openmano first code upload

[osm/RO.git] / nfvo.py

# -*- coding: utf-8 -*-

##
# Copyright 2015 Telefónica Investigación y Desarrollo, S.A.U.
# This file is part of openmano
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
#         http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
#
# For those usages not covered by the Apache License, Version 2.0 please
# contact with: nfvlabs@tid.es
##

'''
NFVO engine, implementing all the methods for the creation, deletion and management of vnfs, scenarios and instances
'''
__author__="Alfonso Tierno, Gerardo Garcia, Pablo Montes"
__date__ ="$16-sep-2014 22:05:01$"

import imp
#import json
import yaml
from utils import auxiliary_functions as af
from nfvo_db import HTTP_Unauthorized, HTTP_Bad_Request, HTTP_Internal_Server_Error, HTTP_Not_Found,\
    HTTP_Conflict, HTTP_Method_Not_Allowed
import console_proxy_thread as cli

global global_config
global vimconn_imported

vimconn_imported={} #dictionary with VIM type as key, loaded module as value

class NfvoException(Exception):
    def __init__(self, error_code, text_message):
        self.error_code = error_code
        Exception.__init__(self, text_message)


def get_flavorlist(mydb, vnf_id, nfvo_tenant=None):
    '''Obtain flavorList
    return result, content:
        <0, error_text upon error
        nb_records, flavor_list on success
    '''
    WHERE_dict={}
    WHERE_dict['vnf_id'] = vnf_id
    if nfvo_tenant is not None:
        WHERE_dict['nfvo_tenant_id'] = nfvo_tenant
    
    #result, content = mydb.get_table(FROM='vms join vnfs on vms.vnf_id = vnfs.uuid',SELECT=('uuid'),WHERE=WHERE_dict )
    #result, content = mydb.get_table(FROM='vms',SELECT=('vim_flavor_id',),WHERE=WHERE_dict )
    result, content = mydb.get_table(FROM='vms join flavors on vms.flavor_id=flavors.uuid',SELECT=('flavor_id',),WHERE=WHERE_dict )
    if result < 0:
        print "nfvo.get_flavorlist error %d %s" % (result, content)
        return -result, content
    print "get_flavor_list result:", result
    print "get_flavor_list content:", content
    flavorList=[]
    for flavor in content:
        flavorList.append(flavor['flavor_id'])
    return result, flavorList

def get_imagelist(mydb, vnf_id, nfvo_tenant=None):
    '''Obtain imageList
    return result, content:
        <0, error_text upon error
        nb_records, flavor_list on success
    '''
    WHERE_dict={}
    WHERE_dict['vnf_id'] = vnf_id
    if nfvo_tenant is not None:
        WHERE_dict['nfvo_tenant_id'] = nfvo_tenant
    
    #result, content = mydb.get_table(FROM='vms join vnfs on vms-vnf_id = vnfs.uuid',SELECT=('uuid'),WHERE=WHERE_dict )
    result, content = mydb.get_table(FROM='vms join images on vms.image_id=images.uuid',SELECT=('image_id',),WHERE=WHERE_dict )
    if result < 0:
        print "nfvo.get_imagelist error %d %s" % (result, content)
        return -result, content
    print "get_image_list result:", result
    print "get_image_list content:", content
    imageList=[]
    for image in content:
        imageList.append(image['image_id'])
    return result, imageList

def get_vim(mydb, nfvo_tenant=None, datacenter_id=None, datacenter_name=None, vim_tenant=None):
    '''Obtain a dictionary of VIM (datacenter) classes with some of the input parameters
    return result, content:
        <0, error_text upon error
        NUMBER, dictionary with datacenter_id: vim_class with these keys: 
            'nfvo_tenant_id','datacenter_id','vim_tenant_id','vim_url','vim_url_admin','datacenter_name','type','user','passwd'
    '''
    WHERE_dict={}
    if nfvo_tenant     is not None:  WHERE_dict['nfvo_tenant_id'] = nfvo_tenant
    if datacenter_id   is not None:  WHERE_dict['d.uuid']  = datacenter_id
    if datacenter_name is not None:  WHERE_dict['d.name']  = datacenter_name
    if vim_tenant      is not None:  WHERE_dict['dt.vim_tenant_id']  = vim_tenant
    if nfvo_tenant or vim_tenant:
        from_= 'tenants_datacenters as td join datacenters as d on td.datacenter_id=d.uuid join datacenter_tenants as dt on td.datacenter_tenant_id=dt.uuid'
        select_ = ('type','config','d.uuid as datacenter_id', 'vim_url', 'vim_url_admin', 'd.name as datacenter_name',
                   'dt.uuid as datacenter_tenant_id','dt.vim_tenant_name as vim_tenant_name','dt.vim_tenant_id as vim_tenant_id',
                   'user','passwd')
    else:
        from_ = 'datacenters as d'
        select_ = ('type','config','d.uuid as datacenter_id', 'vim_url', 'vim_url_admin', 'd.name as datacenter_name')
    result, content = mydb.get_table(FROM=from_, SELECT=select_, WHERE=WHERE_dict )
    if result < 0:
        print "nfvo.get_vim error %d %s" % (result, content)
        return result, content
    #elif result==0:
    #    print "nfvo.get_vim not found a valid VIM with the input params " + str(WHERE_dict)
    #    return -HTTP_Not_Found, "datacenter not found for " +  str(WHERE_dict)
    #print content
    vim_dict={}
    for vim in content:
        extra={'datacenter_tenant_id': vim.get('datacenter_tenant_id')}
        if vim["config"] != None:
            extra.update(yaml.load(vim["config"]))
        if vim["type"] not in vimconn_imported:
            module_info=None
            try:
                module = "vimconn_" + vim["type"]
                module_info = imp.find_module(module)
                vim_conn = imp.load_module(vim["type"], *module_info)
                vimconn_imported[vim["type"]] = vim_conn
            except (IOError, ImportError) as e:
                if module_info and module_info[0]:
                    file.close(module_info[0])
                print "Cannot open VIM module '%s.py'; %s: %s" % ( module, type(e).__name__, str(e))
                return -HTTP_Bad_Request, "Unknown vim type %s" % vim["type"]

        try:
            tenant=vim.get('vim_tenant_id')
            if not tenant:
                tenant=vim.get('vim_tenant_name')
            #if not tenant:
            #    return -HTTP_Bad_Request, "You must provide a valid tenant name or uuid for VIM  %s" % ( vim["type"])
            vim_dict[ vim['datacenter_id'] ] = vimconn_imported[ vim["type"] ].vimconnector(
                            uuid=vim['datacenter_id'], name=vim['datacenter_name'],
                            tenant=tenant, 
                            url=vim['vim_url'], url_admin=vim['vim_url_admin'], 
                            user=vim.get('user'), passwd=vim.get('passwd'),
                            config=extra
                    )
        except Exception as e:
            return -HTTP_Internal_Server_Error, "Error at VIM  %s; %s: %s" % ( vim["type"], type(e).__name__, str(e))
    return len(vim_dict), vim_dict

def rollback(mydb,  vims, rollback_list):
    undeleted_items=[]
    #delete things by reverse order 
    for i in range(len(rollback_list)-1, -1, -1):
        item = rollback_list[i]
        if item["where"]=="vim":
            if item["vim_id"] not in vims:
                continue
            vim=vims[ item["vim_id"] ]
            if item["what"]=="image":
                result, message = vim.delete_tenant_image(item["uuid"])
                if result < 0:
                    print "Error in rollback. Not possible to delete VIM image '%s'. Message: %s" % (item["uuid"],message)
                    undeleted_items.append("image %s from VIM %s" % (item["uuid"],vim["name"]))
                else:
                    result, message = mydb.delete_row_by_dict(FROM="datacenters_images", WEHRE={"datacenter_id": vim["id"], "vim_id":item["uuid"]})
                    if result < 0:
                        print "Error in rollback. Not possible to delete image '%s' from DB.dacenters_images. Message: %s" % (item["uuid"],message)
            elif item["what"]=="flavor":
                result, message = vim.delete_tenant_flavor(item["uuid"])
                if result < 0:
                    print "Error in rollback. Not possible to delete VIM flavor '%s'. Message: %s" % (item["uuid"],message)
                    undeleted_items.append("flavor %s from VIM %s" % (item["uuid"],vim["name"]))
                else:
                    result, message = mydb.delete_row_by_dict(FROM="datacenters_flavos", WEHRE={"datacenter_id": vim["id"], "vim_id":item["uuid"]})
                    if result < 0:
                        print "Error in rollback. Not possible to delete flavor '%s' from DB.dacenters_flavors. Message: %s" % (item["uuid"],message)
            elif item["what"]=="network":
                result, message = vim.delete_tenant_network(item["uuid"])
                if result < 0:
                    print "Error in rollback. Not possible to delete VIM network  '%s'. Message: %s" % (item["uuid"],message)
                    undeleted_items.append("network %s from VIM %s" % (item["uuid"],vim["name"]))
            elif item["what"]=="vm":
                result, message = vim.delete_tenant_vminstance(item["uuid"])
                if result < 0:
                    print "Error in rollback. Not possible to delete VIM VM  '%s'. Message: %s" % (item["uuid"],message)
                    undeleted_items.append("VM %s from VIM %s" % (item["uuid"],vim["name"]))
        else: # where==mano
            if item["what"]=="image":
                result, message = mydb.delete_row_by_dict(FROM="images", WEHRE={"uuid": item["uuid"]})
                if result < 0:
                    print "Error in rollback. Not possible to delete image '%s' from DB.images. Message: %s" % (item["uuid"],message)
                    undeleted_items.append("image %s" % (item["uuid"]))
            elif item["what"]=="flavor":
                result, message = mydb.delete_row_by_dict(FROM="flavors", WEHRE={"uuid": item["uuid"]})
                if result < 0:
                    print "Error in rollback. Not possible to delete flavor '%s' from DB.flavors. Message: %s" % (item["uuid"],message)
                    undeleted_items.append("flavor %s" % (item["uuid"]))
    if len(undeleted_items)==0: 
        return True," Rollback successful."
    else:
        return False," Rollback fails to delete: " + str(undeleted_items)
  
def check_vnf_descriptor(vnf_descriptor):
    global global_config
    #create a dictionary with vnfc-name: vnfc:interface-list  key:values pairs 
    vnfc_interfaces={}
    for vnfc in vnf_descriptor["vnf"]["VNFC"]:
        name_list = []
        #dataplane interfaces
        for numa in vnfc.get("numas",() ):
            for interface in numa.get("interfaces",()):
                if interface["name"] in name_list:
                    return -HTTP_Bad_Request, "Error at vnf:VNFC[name:'%s']:numas:interfaces:name, interface name '%s' already used in this VNFC" %(vnfc["name"], interface["name"])
                name_list.append( interface["name"] ) 
        #bridge interfaces
        for interface in vnfc.get("bridge-ifaces",() ):
            if interface["name"] in name_list:
                return -HTTP_Bad_Request, "Error at vnf:VNFC[name:'%s']:bridge-ifaces:name, interface name '%s' already used in this VNFC" %(vnfc["name"], interface["name"])
            name_list.append( interface["name"] ) 
        vnfc_interfaces[ vnfc["name"] ] = name_list
    
    #check if the info in external_connections matches with the one in the vnfcs
    name_list=[]
    for external_connection in vnf_descriptor["vnf"].get("external-connections",() ):
        if external_connection["name"] in name_list:
            return -HTTP_Bad_Request, "Error at vnf:external-connections:name, value '%s' already used as an external-connection" %(external_connection["name"])
        name_list.append(external_connection["name"])
        if external_connection["VNFC"] not in vnfc_interfaces:
            return -HTTP_Bad_Request, "Error at vnf:external-connections[name:'%s']:VNFC, value '%s' does not match any VNFC" %(external_connection["name"], external_connection["VNFC"])
        if external_connection["local_iface_name"] not in vnfc_interfaces[ external_connection["VNFC"] ]:
            return -HTTP_Bad_Request, "Error at vnf:external-connections[name:'%s']:local_iface_name, value '%s' does not match any interface of this VNFC" %(external_connection["name"], external_connection["local_iface_name"])
    
    #check if the info in internal_connections matches with the one in the vnfcs
    name_list=[]
    for internal_connection in vnf_descriptor["vnf"].get("internal-connections",() ):
        if internal_connection["name"] in name_list:
            return -HTTP_Bad_Request, "Error at vnf:internal-connections:name, value '%s' already used as an internal-connection" %(internal_connection["name"])
        name_list.append(internal_connection["name"])
        #We should check that internal-connections of type "ptp" have only 2 elements
        if len(internal_connection["elements"])>2 and internal_connection["type"] == "ptp":
            return -HTTP_Bad_Request, "Error at vnf:internal-connections[name:'%s']:elements, size must be 2 for a type:'ptp'" %(internal_connection["name"])
        for port in internal_connection["elements"]:
            if port["VNFC"] not in vnfc_interfaces:
                return -HTTP_Bad_Request, "Error at vnf:internal-connections[name:'%s']:elements[]:VNFC, value '%s' does not match any VNFC" %(internal_connection["name"], port["VNFC"])
            if port["local_iface_name"] not in vnfc_interfaces[ port["VNFC"] ]:
                return -HTTP_Bad_Request, "Error at vnf:internal-connections[name:'%s']:elements[]:local_iface_name, value '%s' does not match any interface of this VNFC" %(internal_connection["name"], port["local_iface_name"])

    
    return 200, None

def create_or_use_image(mydb, vims, image_dict, rollback_list, only_create_at_vim=False, return_on_error = False):
    #look if image exist
    if only_create_at_vim:
        image_mano_id = image_dict['uuid']
    else:
        res,content = mydb.get_table(FROM="images", WHERE={'location':image_dict['location'], 'metadata':image_dict['metadata']})
        if res>=1:
            image_mano_id = content[0]['uuid']
        elif res<0:
            return res, content
        else:
            #create image
            temp_image_dict={'name':image_dict['name'],         'description':image_dict.get('description',None),
                            'location':image_dict['location'],  'metadata':image_dict.get('metadata',None)
                            }
            res,content = mydb.new_row('images', temp_image_dict, tenant_id=None, add_uuid=True)
            if res>0:
                image_mano_id= content
                rollback_list.append({"where":"mano", "what":"image","uuid":image_mano_id})
            else:
                return res if res<0 else -1, content
    #create image at every vim
    for vim_id,vim in vims.iteritems():
        image_created="false"
        #look at database
        res_db,image_db = mydb.get_table(FROM="datacenters_images", WHERE={'datacenter_id':vim_id, 'image_id':image_mano_id})
        if res_db<0:
            return res_db, image_db
        #look at VIM if this image exist
        res_vim, image_vim_id = vim.get_image_id_from_path(image_dict['location'])
        if res_vim < 0:
            print "Error contacting VIM to know if the image %s existed previously." %image_vim_id
            continue
        elif res_vim==0:
            #Create the image in VIM
            result, image_vim_id = vim.new_tenant_image(image_dict)
            if result < 0:
                print "Error creating image at VIM: %s." %image_vim_id
                if return_on_error:
                    return result, image_vim_id
                continue
            else:
                rollback_list.append({"where":"vim", "vim_id": vim_id, "what":"image","uuid":image_vim_id})
                image_created="true"
            
        #if reach here the image has been create or exist
        if res_db==0:
            #add new vim_id at datacenters_images
            mydb.new_row('datacenters_images', {'datacenter_id':vim_id, 'image_id':image_mano_id, 'vim_id': image_vim_id, 'created':image_created})
        elif image_db[0]["vim_id"]!=image_vim_id:
            #modify existing vim_id at datacenters_images
            mydb.update_rows('datacenters_images', UPDATE={'vim_id':image_vim_id}, WHERE={'datacenter_id':vim_id, 'image_id':image_mano_id})
            
    return 1, image_vim_id if only_create_at_vim else image_mano_id

def create_or_use_flavor(mydb, vims, flavor_dict, rollback_list, only_create_at_vim=False, return_on_error = False):
    temp_flavor_dict= {'disk':flavor_dict.get('disk',1),
            'ram':flavor_dict.get('ram'),
            'vcpus':flavor_dict.get('vcpus'),
        }
    if 'extended' in flavor_dict and flavor_dict['extended']==None:
        del flavor_dict['extended']
    if 'extended' in flavor_dict:
        temp_flavor_dict['extended']=yaml.safe_dump(flavor_dict['extended'],default_flow_style=True,width=256)

    #look if flavor exist
    if only_create_at_vim:
        flavor_mano_id = flavor_dict['uuid']
    else:
        res,content = mydb.get_table(FROM="flavors", WHERE=temp_flavor_dict)
        if res>=1:
            flavor_mano_id = content[0]['uuid']
        elif res<0:
            return res, content
        else:
            #create flavor
            #create one by one the images of aditional disks
            dev_image_list=[] #list of images
            if 'extended' in flavor_dict and flavor_dict['extended']!=None:
                dev_nb=0
                for device in flavor_dict['extended'].get('devices',[]):
                    if "image" not in device:
                        continue
                    image_dict={'location':device['image'], 'name':flavor_dict['name']+str(dev_nb)+"-img", 'description':flavor_dict.get('description')}
                    image_metadata_dict = device.get('image metadata', None)
                    image_metadata_str = None
                    if image_metadata_dict != None: 
                        image_metadata_str = yaml.safe_dump(image_metadata_dict,default_flow_style=True,width=256)
                    image_dict['metadata']=image_metadata_str
                    res, image_id = create_or_use_image(mydb, vims, image_dict, rollback_list)
                    if res < 0:
                        return res, image_id + rollback(mydb, vims, rollback_list)[1]
                    print "Additional disk image id for VNFC %s: %s" % (flavor_dict['name']+str(dev_nb)+"-img", image_id)
                    dev_image_list.append(image_id)
                    dev_nb += 1                
            temp_flavor_dict['name'] = flavor_dict['name']
            temp_flavor_dict['description'] = flavor_dict.get('description',None)
            res,content = mydb.new_row('flavors', temp_flavor_dict, tenant_id=None, add_uuid=True)
            if res>0:
                flavor_mano_id= content
                rollback_list.append({"where":"mano", "what":"flavor","uuid":flavor_mano_id})
            else:
                return res if res<0 else -1, content
    #create flavor at every vim
    if 'uuid' in flavor_dict:
        del flavor_dict['uuid']
    flavor_vim_id=None
    for vim_id,vim in vims.items():
        flavor_created="false"
        #look at database
        res_db,flavor_db = mydb.get_table(FROM="datacenters_flavors", WHERE={'datacenter_id':vim_id, 'flavor_id':flavor_mano_id})
        if res_db<0:
            return res_db, flavor_db
        #look at VIM if this flavor exist  SKIPPED
        #res_vim, flavor_vim_id = vim.get_flavor_id_from_path(flavor_dict['location'])
        #if res_vim < 0:
        #    print "Error contacting VIM to know if the flavor %s existed previously." %flavor_vim_id
        #    continue
        #elif res_vim==0:
    
        #Create the flavor in VIM
        #Translate images at devices from MANO id to VIM id
        error=False
        if 'extended' in flavor_dict and flavor_dict['extended']!=None and "devices" in flavor_dict['extended']:
            #make a copy of original devices
            devices_original=[]
            for device in flavor_dict["extended"].get("devices",[]):
                dev={}
                dev.update(device)
                devices_original.append(dev)
                if 'image' in device:
                    del device['image']
                if 'image metadata' in device:
                    del device['image metadata']
            dev_nb=0
            for index in range(0,len(devices_original)) :
                device=devices_original[index]
                if "image" not in device:
                    continue
                image_dict={'location':device['image'], 'name':flavor_dict['name']+str(dev_nb)+"-img", 'description':flavor_dict.get('description')}
                image_metadata_dict = device.get('image metadata', None)
                image_metadata_str = None
                if image_metadata_dict != None: 
                    image_metadata_str = yaml.safe_dump(image_metadata_dict,default_flow_style=True,width=256)
                image_dict['metadata']=image_metadata_str
                r,image_mano_id=create_or_use_image(mydb, vims, image_dict, rollback_list, only_create_at_vim=False)
                if r<0:
                    print "Error creating device image for flavor: %s." %image_mano_id
                    error_text = image_mano_id
                    error=True
                    break
                image_dict["uuid"]=image_mano_id
                r,image_vim_id=create_or_use_image(mydb, vims, image_dict, rollback_list, only_create_at_vim=True)
                if r<0:
                    print "Error creating device image for flavor at VIM: %s." %image_vim_id
                    error_text = image_vim_id
                    error=True
                    break
                flavor_dict["extended"]["devices"][index]['imageRef']=image_vim_id
                dev_nb += 1
        if error:
            if return_on_error:
                return r, error_text
            continue
        if res_db>0:
            #check that this vim_id exist in VIM, if not create
            flavor_vim_id=flavor_db[0]["vim_id"]
            result, _ = vim.get_tenant_flavor(flavor_vim_id)
            if result>=0: #flavor exist
                continue
        #create flavor at vim
        print "nfvo.create_or_use_flavor() adding flavor to VIM %s" % vim["name"]
        result, flavor_vim_id = vim.new_tenant_flavor(flavor_dict)
        
        if result < 0:
            print "Error creating flavor at VIM %s: %s." %(vim["name"], flavor_vim_id)
            if return_on_error:
                return result, flavor_vim_id
            continue
        else:
            rollback_list.append({"where":"vim", "vim_id": vim_id, "what":"flavor","uuid":flavor_vim_id})
            flavor_created="true"
        
        #if reach here the flavor has been create or exist
        if res_db==0:
            #add new vim_id at datacenters_flavors
            mydb.new_row('datacenters_flavors', {'datacenter_id':vim_id, 'flavor_id':flavor_mano_id, 'vim_id': flavor_vim_id, 'created':flavor_created})
        elif flavor_db[0]["vim_id"]!=flavor_vim_id:
            #modify existing vim_id at datacenters_flavors
            mydb.update_rows('datacenters_flavors', UPDATE={'vim_id':flavor_vim_id}, WHERE={'datacenter_id':vim_id, 'flavor_id':flavor_mano_id})
            
    return 1, flavor_vim_id if only_create_at_vim else flavor_mano_id

def new_vnf(mydb, tenant_id, vnf_descriptor):
    global global_config
    
    # Step 1. Check the VNF descriptor
    result, message = check_vnf_descriptor(vnf_descriptor)
    if result < 0:
        print "new_vnf error: %s" %message
        return result, message

    # Step 2. Check tenant exist
    if tenant_id != "any":
        if not check_tenant(mydb, tenant_id): 
            print 'nfvo.new_vnf() tenant %s not found' % tenant_id
            return -HTTP_Not_Found, 'Tenant %s not found' % tenant_id
        if "tenant_id" in vnf_descriptor["vnf"]:
            if vnf_descriptor["vnf"]["tenant_id"] != tenant_id:
                print "nfvo.new_vnf() tenant '%s' not found" % tenant_id
                return -HTTP_Unauthorized, "VNF can not have a different tenant owner '%s', must be '%s'" %(vnf_descriptor["vnf"]["tenant_id"], tenant_id)
        else:
            vnf_descriptor['vnf']['tenant_id'] = tenant_id
        # Step 3. Get the URL of the VIM from the nfvo_tenant and the datacenter
        result, vims = get_vim(mydb, tenant_id)
        if result < 0:
            print "nfvo.new_vnf() error. Datacenter not found"
            return result, vims
    else:
        vims={}

    # Step 4. Review the descriptor and add missing  fields
    #print vnf_descriptor
    print "Refactoring VNF descriptor with fields: description, public (default: true)"
    vnf_name = vnf_descriptor['vnf']['name']
    vnf_descriptor['vnf']['description'] = vnf_descriptor['vnf'].get("description", vnf_name)
    if "physical" in vnf_descriptor['vnf']:
        del vnf_descriptor['vnf']['physical']
    #print vnf_descriptor
    # Step 5. Check internal connections
    # TODO: to be moved to step 1????
    internal_connections=vnf_descriptor['vnf'].get('internal_connections',[])
    for ic in internal_connections:
        if len(ic['elements'])>2 and ic['type']=='ptp':
            return -HTTP_Bad_Request, "Mismatch 'type':'ptp' with %d elements at 'vnf':'internal-conections'['name':'%s']. Change 'type' to 'data'" %(len(ic), ic['name'])
        elif len(ic['elements'])==2 and ic['type']=='data':
            return -HTTP_Bad_Request, "Mismatch 'type':'data' with 2 elements at 'vnf':'internal-conections'['name':'%s']. Change 'type' to 'ptp'" %(ic['name'])
    
    # Step 6. For each VNFC in the descriptor, flavors and images are created in the VIM 
    print 'BEGIN creation of VNF "%s"' % vnf_name
    print "VNF %s: consisting of %d VNFC(s)" % (vnf_name,len(vnf_descriptor['vnf']['VNFC']))
    
    #For each VNFC, we add it to the VNFCDict and we  create a flavor.
    VNFCDict = {}     # Dictionary, key: VNFC name, value: dict with the relevant information to create the VNF and VMs in the MANO database
    rollback_list = []    # It will contain the new images created in mano. It is used for rollback

    try:
        print "Creating additional disk images and new flavors in the VIM for each VNFC"
        for vnfc in vnf_descriptor['vnf']['VNFC']:
            VNFCitem={}
            VNFCitem["name"] = vnfc['name']
            VNFCitem["description"] = vnfc.get("description", 'VM %s of the VNF %s' %(vnfc['name'],vnf_name))
            
            print "Flavor name: %s. Description: %s" % (VNFCitem["name"]+"-flv", VNFCitem["description"])
            
            myflavorDict = {}
            myflavorDict["name"] = vnfc['name']+"-flv"
            myflavorDict["description"] = VNFCitem["description"]
            myflavorDict["ram"] = vnfc.get("ram", 0)
            myflavorDict["vcpus"] = vnfc.get("vcpus", 0)
            myflavorDict["disk"] = vnfc.get("disk", 1)
            myflavorDict["extended"] = {}
            
            devices = vnfc.get("devices")
            if devices != None:
                myflavorDict["extended"]["devices"] = devices
            
            # TODO:
            # Mapping from processor models to rankings should be available somehow in the NFVO. They could be taken from VIM or directly from a new database table
            # Another option is that the processor in the VNF descriptor specifies directly the ranking of the host 
            
            # Previous code has been commented
            #if vnfc['processor']['model'] == "Intel(R) Xeon(R) CPU E5-4620 0 @ 2.20GHz" :
            #    myflavorDict["flavor"]['extended']['processor_ranking'] = 200
            #elif vnfc['processor']['model'] == "Intel(R) Xeon(R) CPU E5-2697 v2 @ 2.70GHz" :
            #    myflavorDict["flavor"]['extended']['processor_ranking'] = 300
            #else:
            #    result2, message = rollback(myvim, myvimURL, myvim_tenant, flavorList, imageList)
            #    if result2:
            #        print "Error creating flavor: unknown processor model. Rollback successful."
            #        return -HTTP_Bad_Request, "Error creating flavor: unknown processor model. Rollback successful."
            #    else:
            #        return -HTTP_Bad_Request, "Error creating flavor: unknown processor model. Rollback fail: you need to access VIM and delete the following %s" % message
            myflavorDict['extended']['processor_ranking'] = 100  #Hardcoded value, while we decide when the mapping is done
     
            if 'numas' in vnfc and len(vnfc['numas'])>0:
                myflavorDict['extended']['numas'] = vnfc['numas']

            #print myflavorDict
    
            # Step 6.2 New flavors are created in the VIM
            res, flavor_id = create_or_use_flavor(mydb, vims, myflavorDict, rollback_list)
            if res < 0:
                return res, flavor_id + rollback(mydb, vims, rollback_list)[1]

            print "Flavor id for VNFC %s: %s" % (vnfc['name'],flavor_id)
            VNFCitem["flavor_id"] = flavor_id
            VNFCDict[vnfc['name']] = VNFCitem
            
        print "Creating new images in the VIM for each VNFC"
        # Step 6.3 New images are created in the VIM
        #For each VNFC, we must create the appropriate image.
        #This "for" loop might be integrated with the previous one 
        #In case this integration is made, the VNFCDict might become a VNFClist.
        for vnfc in vnf_descriptor['vnf']['VNFC']:
            print "Image name: %s. Description: %s" % (vnfc['name']+"-img", VNFCDict[vnfc['name']]['description'])
            image_dict={'location':vnfc['VNFC image'], 'name':vnfc['name']+"-img", 'description':VNFCDict[vnfc['name']]['description']}
            image_metadata_dict = vnfc.get('image metadata', None)
            image_metadata_str = None
            if image_metadata_dict is not None: 
                image_metadata_str = yaml.safe_dump(image_metadata_dict,default_flow_style=True,width=256)
            image_dict['metadata']=image_metadata_str
            #print "create_or_use_image", mydb, vims, image_dict, rollback_list
            res, image_id = create_or_use_image(mydb, vims, image_dict, rollback_list)
            if res < 0:
                return res, image_id + rollback(mydb, vims, rollback_list)[1]
            print "Image id for VNFC %s: %s" % (vnfc['name'],image_id)
            VNFCDict[vnfc['name']]["image_id"] = image_id
            VNFCDict[vnfc['name']]["image_path"] = vnfc['VNFC image']

    except KeyError as e:
        print "Error while creating a VNF. KeyError: " + str(e)
        _, message = rollback(mydb, vims, rollback_list)
        return -HTTP_Internal_Server_Error, "Error while creating a VNF. KeyError " + str(e) + "." + message
        
    # Step 7. Storing the VNF descriptor in the repository
    if "descriptor" not in vnf_descriptor["vnf"]:
        vnf_descriptor["vnf"]["descriptor"] = yaml.safe_dump(vnf_descriptor, indent=4, explicit_start=True, default_flow_style=False)

    # Step 8. Adding the VNF to the NFVO DB
    try:
        result, vnf_id = mydb.new_vnf_as_a_whole(tenant_id,vnf_name,vnf_descriptor,VNFCDict)
    except KeyError as e:
        print "Error while creating a VNF. KeyError: " + str(e)
        _, message = rollback(mydb, vims, rollback_list)
        return -HTTP_Internal_Server_Error, "Error while creating a VNF. KeyError " + str(e) + "." + message
    
    if result < 0:
        _, message = rollback(mydb, vims, rollback_list)
        return result, vnf_id + "." + message

    return 200,vnf_id

def get_vnf_id(mydb, tenant_id, vnf_id):
    #check valid tenant_id
    if tenant_id != "any" and not check_tenant(mydb, tenant_id): 
        print 'nfvo.get_vnf_id() tenant %s not found' % tenant_id
        return -HTTP_Not_Found, "Tenant '%s' not found" % tenant_id
    #obtain data
    where_or = {}
    if tenant_id != "any":
        where_or["tenant_id"] = tenant_id
        where_or["public"] = True
    result, content = mydb.get_table_by_uuid_name('vnfs', vnf_id, "VNF", WHERE_OR=where_or, WHERE_AND_OR="AND") 
    if result < 0:
        print "nfvo.get_vnf_id() error %d %s" % (result, content)
        return (result, content)

    
    vnf_id=content["uuid"]
    filter_keys = ('uuid','name','description','public', "tenant_id", "created_at")
    filtered_content = dict( (k,v) for k,v in content.iteritems() if k in filter_keys )
    #change_keys_http2db(filtered_content, http2db_vnf, reverse=True)
    data={'vnf' : filtered_content}
    #GET VM
    result,content = mydb.get_table(FROM='vnfs join vms on vnfs.uuid=vms.vnf_id',
            SELECT=('vms.uuid as uuid','vms.name as name', 'vms.description as description'), 
            WHERE={'vnfs.uuid': vnf_id} )
    if result < 0:
        print "nfvo.get_vnf_id error %d %s" % (result, content)
        return (result, content)
    elif result==0:
        print "nfvo.get_vnf_id vnf '%s' not found" % vnf_id
        return (-HTTP_Not_Found, "vnf %s not found" % vnf_id)

    data['vnf']['VNFC'] = content
    #GET NET
    result,content = mydb.get_table(FROM='vnfs join nets on vnfs.uuid=nets.vnf_id', 
                                    SELECT=('nets.uuid as uuid','nets.name as name','nets.description as description', 'nets.type as type', 'nets.multipoint as multipoint'),
                                    WHERE={'vnfs.uuid': vnf_id} )
    if result < 0:
        print "nfvo.get_vnf_id error %d %s" % (result, content)
        return (result, content)
    else:
        if result==0:
            data['vnf']['nets'] = []
        else:
            data['vnf']['nets'] = content
    #GET Interfaces
    result,content = mydb.get_table(FROM='vnfs join vms on vnfs.uuid=vms.vnf_id join interfaces on vms.uuid=interfaces.vm_id',\
                                    SELECT=('interfaces.uuid as uuid','interfaces.external_name as external_name', 'vms.name as vm_name', 'interfaces.vm_id as vm_id', \
                                            'interfaces.internal_name as internal_name', 'interfaces.type as type', 'interfaces.vpci as vpci','interfaces.bw as bw'),\
                                    WHERE={'vnfs.uuid': vnf_id}, 
                                    WHERE_NOT={'interfaces.external_name': None} )
    #print content
    if result < 0:
        print "nfvo.get_vnf_id error %d %s" % (result, content)
        return (result, content)
    else:
        if result==0:
            data['vnf']['external-connections'] = []
        else:
            data['vnf']['external-connections'] = content
    return 0, data


def delete_vnf(mydb,tenant_id,vnf_id,datacenter=None,vim_tenant=None):
    # Check tenant exist
    if tenant_id != "any":
        if not check_tenant(mydb, tenant_id): 
            print 'nfvo.delete_vnf() tenant %s not found' % tenant_id
            return -HTTP_Not_Found, 'Tenant %s not found' % tenant_id
        # Get the URL of the VIM from the nfvo_tenant and the datacenter
        result, vims = get_vim(mydb, tenant_id)
        if result < 0:
            print "nfvo.delete_vnf() error. Datacenter not found"
            return result, vims
    else:
        vims={}

    # Checking if it is a valid uuid and, if not, getting the uuid assuming that the name was provided"
    where_or = {}
    if tenant_id != "any":
        where_or["tenant_id"] = tenant_id
        where_or["public"] = True
    result, content = mydb.get_table_by_uuid_name('vnfs', vnf_id, "VNF", WHERE_OR=where_or, WHERE_AND_OR="AND") 
    if result < 0: 
        return result, content
    vnf_id = content["uuid"]
    
    # "Getting the list of flavors and tenants of the VNF"
    result,flavorList = get_flavorlist(mydb, vnf_id) 
    if result < 0:
        print flavorList
    elif result==0:
        print "delete_vnf error. No flavors found for the VNF id '%s'" % vnf_id
    
    result,imageList = get_imagelist(mydb, vnf_id)
    print "imageList", imageList
    if result < 0:
        print imageList
    elif result==0:
        print "delete_vnf error. No images found for the VNF id '%s'" % vnf_id
    
    result, content = mydb.delete_row('vnfs', vnf_id, tenant_id)
    if result == 0:
        return -HTTP_Not_Found, content
    elif result >0:
        print content
    else:
        print "delete_vnf error",result, content
        return result, content
    
    undeletedItems = []
    for flavor in flavorList:
        #check if flavor is used by other vnf
        r,c = mydb.get_table(FROM='vms', WHERE={'flavor_id':flavor} )
        if r < 0:
            print 'delete_vnf_error. Not possible to delete VIM flavor "%s". %s' % (flavor,c)
            undeletedItems.append("flavor "+ flavor["flavor_id"])
        elif r > 0:
            print 'Flavor %s not deleted because it is being used by another VNF %s' %(flavor,str(c))
            continue
        #flavor not used, must be deleted
        #delelte at VIM
        r,c = mydb.get_table(FROM='datacenters_flavors', WHERE={'flavor_id':flavor})
        if r>0:
            for flavor_vim in c:
                if flavor_vim["datacenter_id"] not in vims:
                    continue
                if flavor_vim['created']=='false': #skip this flavor because not created by openmano
                    continue
                myvim=vims[ flavor_vim["datacenter_id"] ]
                result, message = myvim.delete_tenant_flavor(flavor_vim["vim_id"])
                if result < 0:
                    print 'delete_vnf_error. Not possible to delete VIM flavor "%s". Message: %s' % (flavor,message)
                    if result != -HTTP_Not_Found:
                        undeletedItems.append("flavor %s from VIM %s" % (flavor_vim["vim_id"], flavor_vim["datacenter_id"] ))
        #delete flavor from Database, using table flavors and with cascade foreign key also at datacenters_flavors
        result, content = mydb.delete_row('flavors', flavor)
        if result <0:
            undeletedItems.append("flavor %s" % flavor)
        
    for image in imageList:
        #check if image is used by other vnf
        r,c = mydb.get_table(FROM='vms', WHERE={'image_id':image} )
        if r < 0:
            print 'delete_vnf_error. Not possible to delete VIM image "%s". %s' % (image,c)
            undeletedItems.append("image "+ image["image_id"])
        elif r > 0:
            print 'Image %s not deleted because it is being used by another VNF %s' %(image,str(c))
            continue
        #image not used, must be deleted
        #delelte at VIM
        r,c = mydb.get_table(FROM='datacenters_images', WHERE={'image_id':image})
        if r>0:
            for image_vim in c:
                if image_vim["datacenter_id"] not in vims:
                    continue
                if image_vim['created']=='false': #skip this image because not created by openmano
                    continue
                myvim=vims[ image_vim["datacenter_id"] ]
                result, message = myvim.delete_tenant_image(image_vim["vim_id"])
                if result < 0:
                    print 'delete_vnf_error. Not possible to delete VIM image "%s". Message: %s' % (image,message)
                    if result != -HTTP_Not_Found:
                        undeletedItems.append("image %s from VIM %s" % (image_vim["vim_id"], image_vim["datacenter_id"] ))
        #delete image from Database, using table images and with cascade foreign key also at datacenters_images
        result, content = mydb.delete_row('images', image)
        if result <0:
            undeletedItems.append("image %s" % image)

    if undeletedItems: 
        return 200, "delete_vnf error. Undeleted: %s" %(undeletedItems)
    
    return 200,vnf_id

def get_hosts_info(mydb, nfvo_tenant_id, datacenter_name=None):
    result, vims = get_vim(mydb, nfvo_tenant_id, None, datacenter_name)
    if result < 0:
        return result, vims
    elif result == 0:
        return -HTTP_Not_Found, "datacenter '%s' not found" % datacenter_name
    myvim = vims.values()[0]
    result,servers =  myvim.get_hosts_info()
    if result < 0:
        return result, servers
    topology = {'name':myvim['name'] , 'servers': servers}
    return result, topology

def get_hosts(mydb, nfvo_tenant_id):
    result, vims = get_vim(mydb, nfvo_tenant_id)
    if result < 0:
        return result, vims
    elif result == 0:
        return -HTTP_Not_Found, "No datacenter found"
    myvim = vims.values()[0]
    result,hosts =  myvim.get_hosts()
    if result < 0:
        return result, hosts
    print '==================='
    print 'hosts '+ yaml.safe_dump(hosts, indent=4, default_flow_style=False)

    datacenter = {'Datacenters': [ {'name':myvim['name'],'servers':[]} ] }
    for host in hosts:
        server={'name':host['name'], 'vms':[]}
        for vm in host['instances']:
            #get internal name and model
            r,c = mydb.get_table(SELECT=('name',), FROM='instance_vms as iv join vms on iv.vm_id=vms.uuid',\
                WHERE={'vim_vm_id':vm['id']} )
            if r==0:
                print "nfvo.get_hosts virtual machine at VIM (%s) not found at tidnfvo" % vm['id']
                continue
            if r<0:
                print "nfvo.get_hosts virtual machine at VIM (%s) error %d %s" % (vm['id'], r, c)
                continue
            server['vms'].append( {'name':vm['name'] , 'model':c[0]['name']} )
        datacenter['Datacenters'][0]['servers'].append(server)
    #return -400, "en construccion"
    
    #print 'datacenters '+ json.dumps(datacenter, indent=4)
    return result, datacenter

def new_scenario(mydb, tenant_id, topo):

#    result, vims = get_vim(mydb, tenant_id)
#    if result < 0:
#        return result, vims
#1: parse input
    if tenant_id != "any":
        if not check_tenant(mydb, tenant_id): 
            print 'nfvo.new_scenario() tenant %s not found' % tenant_id
            return -HTTP_Not_Found, 'Tenant %s not found' % tenant_id
        if "tenant_id" in topo:
            if topo["tenant_id"] != tenant_id:
                print "nfvo.new_scenario() tenant '%s' not found" % tenant_id
                return -HTTP_Unauthorized, "VNF can not have a different tenant owner '%s', must be '%s'" %(topo["tenant_id"], tenant_id)
    else:
        tenant_id=None

#1.1: get VNFs and external_networks (other_nets). 
    vnfs={}
    other_nets={}  #external_networks, bridge_networks and data_networkds
    nodes = topo['topology']['nodes']
    for k in nodes.keys():
        if nodes[k]['type'] == 'VNF':
            vnfs[k] = nodes[k]
            vnfs[k]['ifaces'] = {}
        elif nodes[k]['type'] == 'other_network' or nodes[k]['type'] == 'external_network': 
            other_nets[k] = nodes[k]
            other_nets[k]['external']=True
        elif nodes[k]['type'] == 'network': 
            other_nets[k] = nodes[k]
            other_nets[k]['external']=False
        

#1.2: Check that VNF are present at database table vnfs. Insert uuid, description and external interfaces
    for name,vnf in vnfs.items():
        WHERE_={}
        error_text = ""
        error_pos = "'topology':'nodes':'" + name + "'"
        if 'vnf_id' in vnf:
            error_text += " 'vnf_id' " +  vnf['vnf_id']
            WHERE_['uuid'] = vnf['vnf_id']
        if 'VNF model' in vnf:
            error_text += " 'VNF model' " +  vnf['VNF model']
            WHERE_['name'] = vnf['VNF model']
        if len(WHERE_) == 0:
            return -HTTP_Bad_Request, "needed a 'vnf_id' or 'VNF model' at " + error_pos
        r,vnf_db = mydb.get_table(SELECT=('uuid','name','description'), FROM='vnfs', WHERE=WHERE_)
        if r<0:
            print "nfvo.new_scenario Error getting vnfs",r,vnf_db
        elif r==0:
            print "nfvo.new_scenario Error" + error_text + " is not present at database"
            return -HTTP_Bad_Request, "unknown" + error_text + " at " + error_pos
        elif r>1:
            print "nfvo.new_scenario Error more than one" + error_text + " are present at database"
            return -HTTP_Bad_Request, "more than one" + error_text + " at " + error_pos + " Concrete with 'vnf_id'"
        vnf['uuid']=vnf_db[0]['uuid']
        vnf['description']=vnf_db[0]['description']
        #get external interfaces
        r,ext_ifaces = mydb.get_table(SELECT=('external_name as name','i.uuid as iface_uuid', 'i.type as type'), 
            FROM='vnfs join vms on vnfs.uuid=vms.vnf_id join interfaces as i on vms.uuid=i.vm_id', 
            WHERE={'vnfs.uuid':vnf['uuid']}, WHERE_NOT={'external_name':None} )
        if r<0:
            print "nfvo.new_scenario Error getting external interfaces of vnfs",r,ext_ifaces
            return -HTTP_Internal_Server_Error, "Error getting external interfaces of vnfs: " + ext_ifaces
        for ext_iface in ext_ifaces:
            vnf['ifaces'][ ext_iface['name'] ] = {'uuid':ext_iface['iface_uuid'], 'type':ext_iface['type']}

#1.4 get list of connections
    conections = topo['topology']['connections']
    conections_list = []
    for k in conections.keys():
        if type(conections[k]['nodes'])==dict: #dict with node:iface pairs
            ifaces_list = conections[k]['nodes'].items()
        elif type(conections[k]['nodes'])==list: #list with dictionary
            ifaces_list=[]
            conection_pair_list = map(lambda x: x.items(), conections[k]['nodes'] )
            for k2 in conection_pair_list:
                ifaces_list += k2

        con_type = conections[k].get("type", "link")
        if con_type != "link":
            if k in other_nets:
                return -HTTP_Bad_Request, "format error. Reapeted network name at 'topology':'connections':'%s'" % (str(k))
            other_nets[k] = {'external': False}
            if conections[k].get("graph"):
                other_nets[k]["graph"] =   conections[k]["graph"]
            ifaces_list.append( (k, None) )

        
        if con_type == "external_network":
            other_nets[k]['external'] = True
            if conections[k].get("model"):
                other_nets[k]["model"] =   conections[k]["model"]
            else:
                other_nets[k]["model"] =   k
        if con_type == "dataplane_net" or con_type == "bridge_net": 
            other_nets[k]["model"] = con_type
        
        
        conections_list.append(set(ifaces_list)) #from list to set to operate as a set (this conversion removes elements that are repeated in a list)
        #print set(ifaces_list)
    #check valid VNF and iface names
        for iface in ifaces_list:
            if iface[0] not in vnfs and iface[0] not in other_nets :
                return -HTTP_Bad_Request, "format error. Invalid VNF name at 'topology':'connections':'%s':'nodes':'%s'" % (str(k), iface[0])
            if iface[0] in vnfs and iface[1] not in vnfs[ iface[0] ]['ifaces']:
                return -HTTP_Bad_Request, "format error. Invalid interface name at 'topology':'connections':'%s':'nodes':'%s':'%s'" % (str(k), iface[0], iface[1])

#1.5 unify connections from the pair list to a consolidated list
    index=0
    while index < len(conections_list):
        index2 = index+1
        while index2 < len(conections_list):
            if len(conections_list[index] & conections_list[index2])>0: #common interface, join nets
                conections_list[index] |= conections_list[index2]
                del conections_list[index2]
            else:
                index2 += 1
        conections_list[index] = list(conections_list[index])  # from set to list again
        index += 1
    #for k in conections_list:
    #    print k
    


#1.6 Delete non external nets
#    for k in other_nets.keys():
#        if other_nets[k]['model']=='bridge' or other_nets[k]['model']=='dataplane_net' or other_nets[k]['model']=='bridge_net':
#            for con in conections_list:
#                delete_indexes=[]
#                for index in range(0,len(con)):
#                    if con[index][0] == k: delete_indexes.insert(0,index) #order from higher to lower
#                for index in delete_indexes:
#                    del con[index]
#            del other_nets[k]
#1.7: Check external_ports are present at database table datacenter_nets
    for k,net in other_nets.items():
        error_pos = "'topology':'nodes':'" + k + "'"
        if net['external']==False:
            if 'name' not in net:
                net['name']=k
            if 'model' not in net:
                return -HTTP_Bad_Request, "needed a 'model' at " + error_pos
            if net['model']=='bridge_net':
                net['type']='bridge';
            elif net['model']=='dataplane_net':
                net['type']='data';
            else:
                return -HTTP_Bad_Request, "unknown 'model' '"+ net['model'] +"' at " + error_pos
        else: #external
#IF we do not want to check that external network exist at datacenter
            pass
#ELSE    
#             error_text = ""
#             WHERE_={}
#             if 'net_id' in net:
#                 error_text += " 'net_id' " +  net['net_id']
#                 WHERE_['uuid'] = net['net_id']
#             if 'model' in net:
#                 error_text += " 'model' " +  net['model']
#                 WHERE_['name'] = net['model']
#             if len(WHERE_) == 0:
#                 return -HTTP_Bad_Request, "needed a 'net_id' or 'model' at " + error_pos
#             r,net_db = mydb.get_table(SELECT=('uuid','name','description','type','shared'),
#                 FROM='datacenter_nets', WHERE=WHERE_ )
#             if r<0:
#                 print "nfvo.new_scenario Error getting datacenter_nets",r,net_db
#             elif r==0:
#                 print "nfvo.new_scenario Error" +error_text+ " is not present at database"
#                 return -HTTP_Bad_Request, "unknown " +error_text+ " at " + error_pos
#             elif r>1:
#                 print "nfvo.new_scenario Error more than one external_network for " +error_text+ " is present at database" 
#                 return -HTTP_Bad_Request, "more than one external_network for " +error_text+ "at "+ error_pos + " Concrete with 'net_id'" 
#             other_nets[k].update(net_db[0])
#ENDIF    
    net_list={}
    net_nb=0  #Number of nets
    for con in conections_list:
        #check if this is connected to a external net
        other_net_index=-1
        #print
        #print "con", con
        for index in range(0,len(con)):
            #check if this is connected to a external net
            for net_key in other_nets.keys():
                if con[index][0]==net_key:
                    if other_net_index>=0:
                        error_text="There is some interface connected both to net '%s' and net '%s'" % (con[other_net_index][0], net_key) 
                        print "nfvo.new_scenario " + error_text
                        return -HTTP_Bad_Request, error_text
                    else:
                        other_net_index = index
                        net_target = net_key
                    break
        #print "other_net_index", other_net_index
        try:
            if other_net_index>=0:
                del con[other_net_index]
#IF we do not want to check that external network exist at datacenter
                if other_nets[net_target]['external'] :
                    if "name" not in other_nets[net_target]:
                        other_nets[net_target]['name'] =  other_nets[net_target]['model']
                    if other_nets[net_target]["type"] == "external_network":
                        if vnfs[ con[0][0] ]['ifaces'][ con[0][1] ]["type"] == "data":
                            other_nets[net_target]["type"] =  "data"
                        else:
                            other_nets[net_target]["type"] =  "bridge"
#ELSE    
#                 if other_nets[net_target]['external'] :
#                     type_='data' if len(con)>1 else 'ptp'  #an external net is connected to a external port, so it is ptp if only one connection is done to this net
#                     if type_=='data' and other_nets[net_target]['type']=="ptp":
#                         error_text = "Error connecting %d nodes on a not multipoint net %s" % (len(con), net_target)
#                         print "nfvo.new_scenario " + error_text
#                         return -HTTP_Bad_Request, error_text
#ENDIF    
                for iface in con:
                    vnfs[ iface[0] ]['ifaces'][ iface[1] ]['net_key'] = net_target
            else:
                #create a net
                net_type_bridge=False
                net_type_data=False
                net_target = "__-__net"+str(net_nb)
                net_list[net_target] = {'name': "net-"+str(net_nb), 'description':"net-%s in scenario %s" %(net_nb,topo['name']),
                    'external':False} 
                for iface in con:
                    vnfs[ iface[0] ]['ifaces'][ iface[1] ]['net_key'] = net_target
                    iface_type = vnfs[ iface[0] ]['ifaces'][ iface[1] ]['type']
                    if iface_type=='mgmt' or iface_type=='bridge':
                        net_type_bridge = True
                    else:
                        net_type_data = True
                if net_type_bridge and net_type_data:
                    error_text = "Error connection interfaces of bridge type with data type. Firs node %s, iface %s" % (iface[0], iface[1])
                    print "nfvo.new_scenario " + error_text
                    return -HTTP_Bad_Request, error_text
                elif net_type_bridge:
                    type_='bridge'
                else:
                    type_='data' if len(con)>2 else 'ptp'
                net_list[net_target]['type'] = type_
                net_nb+=1
        except Exception:
            error_text = "Error connection node %s : %s does not match any VNF or interface" % (iface[0], iface[1])
            print "nfvo.new_scenario " + error_text
            #raise e
            return -HTTP_Bad_Request, error_text

#1.8: Connect to management net all not already connected interfaces of type 'mgmt'
    #1.8.1 obtain management net 
    r,mgmt_net = mydb.get_table(SELECT=('uuid','name','description','type','shared'),
        FROM='datacenter_nets', WHERE={'name':'mgmt'} )
    #1.8.2 check all interfaces from all vnfs 
    if r>0:
        add_mgmt_net = False
        for vnf in vnfs.values():
            for iface in vnf['ifaces'].values():
                if iface['type']=='mgmt' and 'net_key' not in iface:
                    #iface not connected
                    iface['net_key'] = 'mgmt'
                    add_mgmt_net = True
        if add_mgmt_net and 'mgmt' not in net_list:
            net_list['mgmt']=mgmt_net[0]
            net_list['mgmt']['external']=True
            net_list['mgmt']['graph']={'visible':False}

    net_list.update(other_nets)
    print
    print 'net_list', net_list
    print
    print 'vnfs', vnfs
    print

#2: insert scenario. filling tables scenarios,sce_vnfs,sce_interfaces,sce_nets
    r,c = mydb.new_scenario( { 'vnfs':vnfs, 'nets':net_list,
        'tenant_id':tenant_id, 'name':topo['name'], 'description':topo.get('description',topo['name']) } )
    
    return r,c

def new_scenario_v02(mydb, tenant_id, scenario):

    if tenant_id != "any":
        if not check_tenant(mydb, tenant_id): 
            print 'nfvo.new_scenario_v02() tenant %s not found' % tenant_id
            return -HTTP_Not_Found, 'Tenant %s not found' % tenant_id
        if "tenant_id" in scenario:
            if scenario["tenant_id"] != tenant_id:
                print "nfvo.new_scenario_v02() tenant '%s' not found" % tenant_id
                return -HTTP_Unauthorized, "VNF can not have a different tenant owner '%s', must be '%s'" %(scenario["tenant_id"], tenant_id)
    else:
        tenant_id=None

#1: Check that VNF are present at database table vnfs and update content into scenario dict
    for name,vnf in scenario["vnfs"].iteritems():
        WHERE_={}
        error_text = ""
        error_pos = "'topology':'nodes':'" + name + "'"
        if 'vnf_id' in vnf:
            error_text += " 'vnf_id' " +  vnf['vnf_id']
            WHERE_['uuid'] = vnf['vnf_id']
        if 'vnf_model' in vnf:
            error_text += " 'vnf_model' " +  vnf['vnf_model']
            WHERE_['name'] = vnf['vnf_model']
        if len(WHERE_) == 0:
            return -HTTP_Bad_Request, "needed a 'vnf_id' or 'VNF model' at " + error_pos
        r,vnf_db = mydb.get_table(SELECT=('uuid','name','description'), FROM='vnfs', WHERE=WHERE_)
        if r<0:
            print "nfvo.new_scenario Error getting vnfs",r,vnf_db
        elif r==0:
            print "nfvo.new_scenario Error" + error_text + " is not present at database"
            return -HTTP_Bad_Request, "unknown" + error_text + " at " + error_pos
        elif r>1:
            print "nfvo.new_scenario Error more than one" + error_text + " are present at database"
            return -HTTP_Bad_Request, "more than one" + error_text + " at " + error_pos + " Concrete with 'vnf_id'"
        vnf['uuid']=vnf_db[0]['uuid']
        vnf['description']=vnf_db[0]['description']
        vnf['ifaces'] = {}
        #get external interfaces
        r,ext_ifaces = mydb.get_table(SELECT=('external_name as name','i.uuid as iface_uuid', 'i.type as type'), 
            FROM='vnfs join vms on vnfs.uuid=vms.vnf_id join interfaces as i on vms.uuid=i.vm_id', 
            WHERE={'vnfs.uuid':vnf['uuid']}, WHERE_NOT={'external_name':None} )
        if r<0:
            print "nfvo.new_scenario Error getting external interfaces of vnfs",r,ext_ifaces
            return -HTTP_Internal_Server_Error, "Error getting external interfaces of vnfs: " + ext_ifaces
        for ext_iface in ext_ifaces:
            vnf['ifaces'][ ext_iface['name'] ] = {'uuid':ext_iface['iface_uuid'], 'type':ext_iface['type']}

#2: Insert net_key at every vnf interface
    for net_name,net in scenario["networks"].iteritems():
        net_type_bridge=False
        net_type_data=False
        for iface_dict in net["interfaces"]:
            for vnf,iface in iface_dict.iteritems():
                if vnf not in scenario["vnfs"]:
                    error_text = "Error at 'networks':'%s':'interfaces' VNF '%s' not match any VNF at 'vnfs'" % (net_name, vnf)
                    print "nfvo.new_scenario_v02 " + error_text
                    return -HTTP_Bad_Request, error_text
                if iface not in scenario["vnfs"][vnf]['ifaces']:
                    error_text = "Error at 'networks':'%s':'interfaces':'%s' interface not match any VNF interface" % (net_name, iface)
                    print "nfvo.new_scenario_v02 " + error_text
                    return -HTTP_Bad_Request, error_text
                if "net_key" in scenario["vnfs"][vnf]['ifaces'][iface]:
                    error_text = "Error at 'networks':'%s':'interfaces':'%s' interface already connected at network '%s'" \
                                    % (net_name, iface,scenario["vnfs"][vnf]['ifaces'][iface]['net_key'])
                    print "nfvo.new_scenario_v02 " + error_text
                    return -HTTP_Bad_Request, error_text
                scenario["vnfs"][vnf]['ifaces'][ iface ]['net_key'] = net_name
                iface_type = scenario["vnfs"][vnf]['ifaces'][iface]['type']
                if iface_type=='mgmt' or iface_type=='bridge':
                    net_type_bridge = True
                else:
                    net_type_data = True
        if net_type_bridge and net_type_data:
            error_text = "Error connection interfaces of bridge type and data type at 'networks':'%s':'interfaces'" % (net_name)
            print "nfvo.new_scenario " + error_text
            return -HTTP_Bad_Request, error_text
        elif net_type_bridge:
            type_='bridge'
        else:
            type_='data' if len(net["interfaces"])>2 else 'ptp'
        net['type'] = type_
        net['name'] = net_name
        net['external'] = net.get('external', False)

#3: insert at database
    scenario["nets"] = scenario["networks"]
    scenario['tenant_id'] = tenant_id
    r,c = mydb.new_scenario( scenario)
    
    return r,c

def edit_scenario(mydb, tenant_id, scenario_id, data):
    data["uuid"] = scenario_id
    data["tenant_id"] = tenant_id
    r,c = mydb.edit_scenario( data )
    return r,c

def start_scenario(mydb, tenant_id, scenario_id, instance_scenario_name, instance_scenario_description, datacenter=None,vim_tenant=None, startvms=True):
    print "Checking that nfvo_tenant_id exists and getting the VIM URI and the VIM tenant_id"
    datacenter_id = None
    datacenter_name=None
    if datacenter != None:
        if af.check_valid_uuid(datacenter): 
            datacenter_id = datacenter
        else:
            datacenter_name = datacenter
    result, vims = get_vim(mydb, tenant_id, datacenter_id, datacenter_name, vim_tenant)
    if result < 0:
        print "start_scenario error. Datacenter not found"
        return result, vims
    elif result == 0:
        return -HTTP_Not_Found, "datacenter '%s' not found" % str(datacenter)
    elif result > 1:
        print "start_scenario error. Several datacenters available, you must concrete"
        return -HTTP_Bad_Request, "Several datacenters available, you must concrete"
    myvim = vims.values()[0]
    myvim_tenant = myvim['tenant']
    datacenter_id = myvim['id']
    datacenter_name = myvim['name']
    datacenter_tenant_id = myvim['config']['datacenter_tenant_id']
    rollbackList=[]

    print "Checking that the scenario_id exists and getting the scenario dictionary"
    result, scenarioDict = mydb.get_scenario(scenario_id, tenant_id, datacenter_id)
    if result < 0:
        print "start_scenario error. Error interacting with NFVO DB"
        return result, scenarioDict
    elif result == 0:
        print "start_scenario error. Scenario not found"
        return result, scenarioDict

    scenarioDict['datacenter_tenant_id'] = datacenter_tenant_id
    scenarioDict['datacenter_id'] = datacenter_id
    print '================scenarioDict======================='
    #print json.dumps(scenarioDict, indent=4)
    print 'BEGIN launching instance scenario "%s" based on "%s"' % (instance_scenario_name,scenarioDict['name'])

    print "Scenario %s: consisting of %d VNF(s)" % (scenarioDict['name'],len(scenarioDict['vnfs']))
    print yaml.safe_dump(scenarioDict, indent=4, default_flow_style=False)
    
    auxNetDict = {}   #Auxiliar dictionary. First key:'scenario' or sce_vnf uuid. Second Key: uuid of the net/sce_net. Value: vim_net_id
    auxNetDict['scenario'] = {}
    
    print "1. Creating new nets (sce_nets) in the VIM"
    for sce_net in scenarioDict['nets']:
        print "Net name: %s. Description: %s" % (sce_net["name"], sce_net["description"])
        
        myNetName = "%s.%s" % (instance_scenario_name, sce_net['name'])
        myNetName = myNetName[0:255] #limit length
        myNetType = sce_net['type']
        myNetDict = {}
        myNetDict["name"] = myNetName
        myNetDict["type"] = myNetType
        myNetDict["tenant_id"] = myvim_tenant
        #TODO:
        #We should use the dictionary as input parameter for new_tenant_network
        print myNetDict
        if not sce_net["external"]:
            result, network_id = myvim.new_tenant_network(myNetName, myNetType)
            if result < 0:
                print "Error creating network: %s." %network_id
                _, message = rollback(mydb, vims, rollbackList)
                return result, "Error creating network: "+ network_id + "."+message

            print "New VIM network created for scenario %s. Network id:  %s" % (scenarioDict['name'],network_id)
            sce_net['vim_id'] = network_id
            auxNetDict['scenario'][sce_net['uuid']] = network_id
            rollbackList.append({'what':'network','where':'vim','vim_id':datacenter_id,'uuid':network_id})
        else:
            if sce_net['vim_id'] == None:
                error_text = "Error, datacenter '%s' does not have external network '%s'." % (datacenter_name, sce_net['name'])
                _, message = rollback(mydb, vims, rollbackList)
                print "nfvo.start_scenario: " + error_text
                return -HTTP_Bad_Request, error_text
            print "Using existent VIM network for scenario %s. Network id %s" % (scenarioDict['name'],sce_net['vim_id'])
            auxNetDict['scenario'][sce_net['uuid']] = sce_net['vim_id']
    
    print "2. Creating new nets (vnf internal nets) in the VIM"
    #For each vnf net, we create it and we add it to instanceNetlist.
    for sce_vnf in scenarioDict['vnfs']:
        for net in sce_vnf['nets']:
            print "Net name: %s. Description: %s" % (net["name"], net["description"])
            
            myNetName = "%s.%s" % (instance_scenario_name,net['name'])
            myNetName = myNetName[0:255] #limit length
            myNetType = net['type']
            myNetDict = {}
            myNetDict["name"] = myNetName
            myNetDict["type"] = myNetType
            myNetDict["tenant_id"] = myvim_tenant
            print myNetDict
            #TODO:
            #We should use the dictionary as input parameter for new_tenant_network
            result, network_id = myvim.new_tenant_network(myNetName, myNetType)
            if result < 0:
                error_text="Error creating network: %s." % network_id
                _, message = rollback(mydb, vims, rollbackList)
                error_text += message
                print "start_scenario: " + error_text
                return result, error_text
            print "VIM network id for scenario %s: %s" % (scenarioDict['name'],network_id)
            net['vim_id'] = network_id
            if sce_vnf['uuid'] not in auxNetDict:
                auxNetDict[sce_vnf['uuid']] = {}
            auxNetDict[sce_vnf['uuid']][net['uuid']] = network_id
            rollbackList.append({'what':'network','where':'vim','vim_id':datacenter_id,'uuid':network_id})

    print "auxNetDict:"
    print yaml.safe_dump(auxNetDict, indent=4, default_flow_style=False)
    
    print "3. Creating new vm instances in the VIM"
    #myvim.new_tenant_vminstance(self,vimURI,tenant_id,name,description,image_id,flavor_id,net_dict)
    i = 0
    for sce_vnf in scenarioDict['vnfs']:
        for vm in sce_vnf['vms']:
            i += 1
            myVMDict = {}
            #myVMDict['name'] = "%s-%s-%s" % (scenarioDict['name'],sce_vnf['name'], vm['name'])
            myVMDict['name'] = "%s.%s.%d" % (instance_scenario_name,sce_vnf['name'],i)
            #myVMDict['description'] = vm['description']
            myVMDict['description'] = myVMDict['name'][0:99]
            if not startvms:
                myVMDict['start'] = "no"
            myVMDict['name'] = myVMDict['name'][0:255] #limit name length
            print "VM name: %s. Description: %s" % (myVMDict['name'], myVMDict['name'])
            
            #create image at vim in case it not exist
            res, image_dict = mydb.get_table_by_uuid_name("images", vm['image_id'])
            if res<0:
                print "start_scenario error getting image", image_dict
                return res, image_dict
            res, image_id = create_or_use_image(mydb, vims, image_dict, [], True)                
            if res < 0:
                print "start_scenario error adding image to VIM", image_dict
                return res, image_id
            vm['vim_image_id'] = image_id
                
            #create flavor at vim in case it not exist
            res, flavor_dict = mydb.get_table_by_uuid_name("flavors", vm['flavor_id'])
            if res<0:
                print "start_scenario error getting flavor", flavor_dict
                return res, flavor_dict
            if flavor_dict['extended']!=None:
                flavor_dict['extended']= yaml.load(flavor_dict['extended'])
            res, flavor_id = create_or_use_flavor(mydb, vims, flavor_dict, [], True)                
            if res < 0:
                print "start_scenario error adding flavor to VIM", flavor_dict
                return res, flavor_id
            vm['vim_flavor_id'] = flavor_id

            
            myVMDict['imageRef'] = vm['vim_image_id']
            myVMDict['flavorRef'] = vm['vim_flavor_id']
            myVMDict['networks'] = []
            for iface in vm['interfaces']:
                netDict = {}
                if iface['type']=="data":
                    netDict['type'] = iface['model']
                elif "model" in iface and iface["model"]!=None:
                    netDict['model']=iface['model']
                #TODO in future, remove this because mac_address will not be set, and the type of PV,VF is obtained from iterface table model
                #discover type of interface looking at flavor
                for numa in flavor_dict.get('extended',{}).get('numas',[]):
                    for flavor_iface in numa.get('interfaces',[]):
                        if flavor_iface.get('name') == iface['internal_name']:
                            if flavor_iface['dedicated'] == 'yes':
                                netDict['type']="PF"    #passthrough
                            elif flavor_iface['dedicated'] == 'no':
                                netDict['type']="VF"    #siov
                            elif flavor_iface['dedicated'] == 'yes:sriov':
                                netDict['type']="VFnotShared"   #sriov but only one sriov on the PF
                            netDict["mac_address"] = flavor_iface.get("mac_address")
                            break;
                netDict["use"]=iface['type']
                if netDict["use"]=="data" and not netDict.get("type"):
                    #print "netDict", netDict
                    #print "iface", iface
                    e_text = "Cannot determine the interface type PF or VF of VNF '%s' VM '%s' iface '%s'" %(sce_vnf['name'], vm['name'], iface['internal_name'])
                    if flavor_dict.get('extended')==None:
                        return -HTTP_Conflict, e_text + "After database migration some information is not available. \
                                Try to delete and create the scenarios and VNFs again"
                    else:
                        return -HTTP_Internal_Server_Error, e_text
                if netDict["use"]=="mgmt" or netDict["use"]=="bridge":
                    netDict["type"]="virtual"
                if "vpci" in iface and iface["vpci"] is not None:
                    netDict['vpci'] = iface['vpci']
                if "mac" in iface and iface["mac"] is not None:
                    netDict['mac_address'] = iface['mac']
                netDict['name'] = iface['internal_name']
                if iface['net_id'] is None:
                    for vnf_iface in sce_vnf["interfaces"]:
                        print iface
                        print vnf_iface
                        if vnf_iface['interface_id']==iface['uuid']:
                            netDict['net_id'] = auxNetDict['scenario'][ vnf_iface['sce_net_id'] ]
                            break
                else:
                    netDict['net_id'] = auxNetDict[ sce_vnf['uuid'] ][ iface['net_id'] ]
                #skip bridge ifaces not connected to any net
                #if 'net_id' not in netDict or netDict['net_id']==None:
                #    continue
                myVMDict['networks'].append(netDict)
            print ">>>>>>>>>>>>>>>>>>>>>>>>>>>"
            print myVMDict['name']
            print "networks", yaml.safe_dump(myVMDict['networks'], indent=4, default_flow_style=False)
            print "interfaces", yaml.safe_dump(vm['interfaces'], indent=4, default_flow_style=False)
            print ">>>>>>>>>>>>>>>>>>>>>>>>>>>"
            result, vm_id = myvim.new_tenant_vminstance(myVMDict['name'],myVMDict['description'],myVMDict.get('start', None),
                    myVMDict['imageRef'],myVMDict['flavorRef'],myVMDict['networks'])
            if result < 0:
                error_text = "Error creating vm instance: %s." % vm_id
                _, message = rollback(mydb, vims, rollbackList)
                error_text += message
                print "start_scenario: " + error_text
                return result, error_text
            print "VIM vm instance id (server id) for scenario %s: %s" % (scenarioDict['name'],vm_id)
            vm['vim_id'] = vm_id
            rollbackList.append({'what':'vm','where':'vim','vim_id':datacenter_id,'uuid':vm_id})
            #put interface uuid back to scenario[vnfs][vms[[interfaces]
            for net in myVMDict['networks']:
                if "vim_id" in net:
                    for iface in vm['interfaces']:
                        if net["name"]==iface["internal_name"]:
                            iface["vim_id"]=net["vim_id"]
                            break
    
    print "==================Deployment done=========="
    print yaml.safe_dump(scenarioDict, indent=4, default_flow_style=False)
    #r,c = mydb.new_instance_scenario_as_a_whole(nfvo_tenant,scenarioDict['name'],scenarioDict)
    result,c = mydb.new_instance_scenario_as_a_whole(tenant_id,instance_scenario_name, instance_scenario_description, scenarioDict)
    if result <0:
        error_text = c + "." 
        _, message = rollback(mydb, vims, rollbackList)
        error_text += message
        print "start_scenario: " + error_text
        return result, error_text
        
    return mydb.get_instance_scenario(c)

def create_instance(mydb, tenant_id, instance_dict):
    print "Checking that nfvo_tenant_id exists and getting the VIM URI and the VIM tenant_id"
    scenario = instance_dict["scenario"]
    datacenter_id = None
    datacenter_name=None
    datacenter = instance_dict.get("datacenter")
    if datacenter:
        if af.check_valid_uuid(datacenter): 
            datacenter_id = datacenter
        else:
            datacenter_name = datacenter
    result, vims = get_vim(mydb, tenant_id, datacenter_id, datacenter_name, vim_tenant=None)
    if result < 0:
        print "start_scenario error. Datacenter not found"
        return result, vims
    elif result == 0:
        return -HTTP_Not_Found, "datacenter '%s' not found" % str(datacenter)
    elif result > 1:
        print "start_scenario error. Several datacenters available, you must concrete"
        return -HTTP_Bad_Request, "Several datacenters available, you must concrete"
    myvim = vims.values()[0]
    #myvim_tenant = myvim['tenant']
    datacenter_id = myvim['id']
    datacenter_name = myvim['name']
    datacenter_tenant_id = myvim['config']['datacenter_tenant_id']
    rollbackList=[]

    print "Checking that the scenario exists and getting the scenario dictionary"
    result, scenarioDict = mydb.get_scenario(scenario, tenant_id, datacenter_id)
    if result < 0:
        print "start_scenario error. Error interacting with NFVO DB"
        return result, scenarioDict
    elif result == 0:
        print "start_scenario error. Scenario not found"
        return result, scenarioDict

    scenarioDict['datacenter_tenant_id'] = datacenter_tenant_id
    scenarioDict['datacenter_id'] = datacenter_id
    
    auxNetDict = {}   #Auxiliar dictionary. First key:'scenario' or sce_vnf uuid. Second Key: uuid of the net/sce_net. Value: vim_net_id
    auxNetDict['scenario'] = {}
    
    print "scenario dict: ",yaml.safe_dump(scenarioDict, indent=4, default_flow_style=False) 
    instance_name = instance_dict["name"]
    instance_description = instance_dict.get("description")
    try:
    #0 check correct parameters
        for descriptor_net in instance_dict.get("networks",{}).keys():
            found=False
            for scenario_net in scenarioDict['nets']:
                if descriptor_net == scenario_net["name"]:
                    found = True
                    break
            if not found:
                raise NfvoException(-HTTP_Bad_Request, "Invalid scenario network name '%s' at instance:networks" % descriptor_net )
        for descriptor_vnf in instance_dict.get("vnfs",{}).keys():
            found=False
            for scenario_vnf in scenarioDict['vnfs']:
                if descriptor_vnf == scenario_vnf['name']:
                    found = True
                    break
            if not found:
                raise NfvoException(-HTTP_Bad_Request, "Invalid vnf name '%s' at instance:vnfs" % descriptor_vnf )
        
    #1. Creating new nets (sce_nets) in the VIM"
        for sce_net in scenarioDict['nets']:
            descriptor_net =  instance_dict.get("networks",{}).get(sce_net["name"],{})
            net_name = descriptor_net.get("name")
            net_type = sce_net['type']
            lookfor_filter = {'admin_state_up': True, 'status': 'ACTIVE'} #'shared': True
            if sce_net["external"]:
                if not net_name:
                    net_name = sce_net["name"] 
                if "netmap-use" in descriptor_net or "netmap-create" in descriptor_net:
                    create_network = False
                    lookfor_network = False
                    if "netmap-use" in descriptor_net:
                        lookfor_network = True
                        if af.check_valid_uuid(descriptor_net["netmap-use"]):
                            filter_text = "scenario id '%s'" % descriptor_net["netmap-use"]
                            lookfor_filter["id"] = descriptor_net["netmap-use"]
                        else: 
                            filter_text = "scenario name '%s'" % descriptor_net["netmap-use"]
                            lookfor_filter["name"] = descriptor_net["netmap-use"]
                    if "netmap-create" in descriptor_net:
                        create_network = True
                        net_vim_name = net_name
                        if descriptor_net["netmap-create"]:
                            net_vim_name= descriptor_net["netmap-create"]
                        
                elif sce_net['vim_id'] != None:
                    #there is a netmap at datacenter_nets database
                    create_network = False
                    lookfor_network = True
                    lookfor_filter["id"] = sce_net['vim_id']
                    filter_text = "vim_id '%s' datacenter_netmap name '%s'. Try to reload vims with datacenter-net-update" % (sce_net['vim_id'], sce_net["name"])
                    #look for network at datacenter and return error
                else:
                    #There is not a netmap, look at datacenter for a net with this name and create if not found
                    create_network = True
                    lookfor_network = True
                    lookfor_filter["name"] = sce_net["name"]
                    net_vim_name = sce_net["name"]
                    filter_text = "scenario name '%s'" % sce_net["name"]
            else:
                if not net_name:
                    net_name = "%s.%s" %(instance_name, sce_net["name"])
                    net_name = net_name[:255]     #limit length
                net_vim_name = net_name
                create_network = True
                lookfor_network = False
                
            if lookfor_network:
                result, vim_nets = myvim.get_network_list(filter_dict=lookfor_filter)
                if result < 0:
                    raise NfvoException(result, "Not possible to get vim network list " + vim_nets)
                elif len(vim_nets) > 1:
                    raise NfvoException(-HTTP_Bad_Request, "More than one candidate VIM network found for " + filter_text )
                elif len(vim_nets) == 0:
                    if not create_network:
                        raise NfvoException(-HTTP_Bad_Request, "No candidate VIM network found for " + filter_text )
                else:
                    sce_net['vim_id'] = vim_nets[0]['id']
                    auxNetDict['scenario'][sce_net['uuid']] = vim_nets[0]['id']
                    create_network = False
            if create_network:
                #if network is not external
                result, network_id = myvim.new_tenant_network(net_vim_name, net_type)
                if result < 0:
                    raise NfvoException(result, "Error creating vim network " + network_id)
                sce_net['vim_id'] = network_id
                auxNetDict['scenario'][sce_net['uuid']] = network_id
                rollbackList.append({'what':'network','where':'vim','vim_id':datacenter_id,'uuid':network_id})
        
    #2. Creating new nets (vnf internal nets) in the VIM"
        #For each vnf net, we create it and we add it to instanceNetlist.
        for sce_vnf in scenarioDict['vnfs']:
            for net in sce_vnf['nets']:
                descriptor_net =  instance_dict.get("vnfs",{}).get(sce_vnf["name"],{})
                net_name = descriptor_net.get("name")
                if not net_name:
                    net_name = "%s.%s" %(instance_name, net["name"])
                    net_name = net_name[:255]     #limit length
                net_type = net['type']
                result, network_id = myvim.new_tenant_network(net_name, net_type)
                if result < 0:
                    raise NfvoException(result, "Error creating vim network " + network_id)
                net['vim_id'] = network_id
                if sce_vnf['uuid'] not in auxNetDict:
                    auxNetDict[sce_vnf['uuid']] = {}
                auxNetDict[sce_vnf['uuid']][net['uuid']] = network_id
                rollbackList.append({'what':'network','where':'vim','vim_id':datacenter_id,'uuid':network_id})
    
        print "auxNetDict:"
        print yaml.safe_dump(auxNetDict, indent=4, default_flow_style=False)
        
    #3. Creating new vm instances in the VIM
        #myvim.new_tenant_vminstance(self,vimURI,tenant_id,name,description,image_id,flavor_id,net_dict)
        for sce_vnf in scenarioDict['vnfs']:
            i = 0
            for vm in sce_vnf['vms']:
                i += 1
                myVMDict = {}
                myVMDict['name'] = "%s.%s.%d" % (instance_name,sce_vnf['name'],i)
                myVMDict['description'] = myVMDict['name'][0:99]
#                if not startvms:
#                    myVMDict['start'] = "no"
                myVMDict['name'] = myVMDict['name'][0:255] #limit name length
                #create image at vim in case it not exist
                res, image_dict = mydb.get_table_by_uuid_name("images", vm['image_id'])
                if res<0:
                    raise NfvoException(result, "Error getting VIM image "+ image_dict)
                res, image_id = create_or_use_image(mydb, vims, image_dict, [], True)                
                if res < 0:
                    raise NfvoException(result, "Error adding image to VIM " + image_dict)
                vm['vim_image_id'] = image_id
                    
                #create flavor at vim in case it not exist
                res, flavor_dict = mydb.get_table_by_uuid_name("flavors", vm['flavor_id'])
                if res<0:
                    raise NfvoException(result, "Error getting VIM flavor "+ flavor_dict)
                if flavor_dict['extended']!=None:
                    flavor_dict['extended']= yaml.load(flavor_dict['extended'])
                res, flavor_id = create_or_use_flavor(mydb, vims, flavor_dict, [], True)                
                if res < 0:
                    raise NfvoException(result, "Error adding flavor to VIM" + flavor_dict)
                vm['vim_flavor_id'] = flavor_id
                
                myVMDict['imageRef'] = vm['vim_image_id']
                myVMDict['flavorRef'] = vm['vim_flavor_id']
                myVMDict['networks'] = []
#TODO ALF. connect_mgmt_interfaces. Connect management interfaces if this is true
                for iface in vm['interfaces']:
                    netDict = {}
                    if iface['type']=="data":
                        netDict['type'] = iface['model']
                    elif "model" in iface and iface["model"]!=None:
                        netDict['model']=iface['model']
                    #TODO in future, remove this because mac_address will not be set, and the type of PV,VF is obtained from iterface table model
                    #discover type of interface looking at flavor
                    for numa in flavor_dict.get('extended',{}).get('numas',[]):
                        for flavor_iface in numa.get('interfaces',[]):
                            if flavor_iface.get('name') == iface['internal_name']:
                                if flavor_iface['dedicated'] == 'yes':
                                    netDict['type']="PF"    #passthrough
                                elif flavor_iface['dedicated'] == 'no':
                                    netDict['type']="VF"    #siov
                                elif flavor_iface['dedicated'] == 'yes:sriov':
                                    netDict['type']="VFnotShared"   #sriov but only one sriov on the PF
                                netDict["mac_address"] = flavor_iface.get("mac_address")
                                break;
                    netDict["use"]=iface['type']
                    if netDict["use"]=="data" and not netDict.get("type"):
                        #print "netDict", netDict
                        #print "iface", iface
                        e_text = "Cannot determine the interface type PF or VF of VNF '%s' VM '%s' iface '%s'" %(sce_vnf['name'], vm['name'], iface['internal_name'])
                        if flavor_dict.get('extended')==None:
                            raise NfvoException(-HTTP_Conflict, e_text + "After database migration some information is not available. \
                                    Try to delete and create the scenarios and VNFs again")
                        else:
                            raise NfvoException(-HTTP_Internal_Server_Error, e_text)
                    if netDict["use"]=="mgmt" or netDict["use"]=="bridge":
                        netDict["type"]="virtual"
                    if "vpci" in iface and iface["vpci"] is not None:
                        netDict['vpci'] = iface['vpci']
                    if "mac" in iface and iface["mac"] is not None:
                        netDict['mac_address'] = iface['mac']
                    netDict['name'] = iface['internal_name']
                    if iface['net_id'] is None:
                        for vnf_iface in sce_vnf["interfaces"]:
                            print iface
                            print vnf_iface
                            if vnf_iface['interface_id']==iface['uuid']:
                                netDict['net_id'] = auxNetDict['scenario'][ vnf_iface['sce_net_id'] ]
                                break
                    else:
                        netDict['net_id'] = auxNetDict[ sce_vnf['uuid'] ][ iface['net_id'] ]
                    #skip bridge ifaces not connected to any net
                    #if 'net_id' not in netDict or netDict['net_id']==None:
                    #    continue
                    myVMDict['networks'].append(netDict)
                print ">>>>>>>>>>>>>>>>>>>>>>>>>>>"
                print myVMDict['name']
                print "networks", yaml.safe_dump(myVMDict['networks'], indent=4, default_flow_style=False)
                print "interfaces", yaml.safe_dump(vm['interfaces'], indent=4, default_flow_style=False)
                print ">>>>>>>>>>>>>>>>>>>>>>>>>>>"
                result, vm_id = myvim.new_tenant_vminstance(myVMDict['name'],myVMDict['description'],myVMDict.get('start', None),
                        myVMDict['imageRef'],myVMDict['flavorRef'],myVMDict['networks'])
                if result < 0:
                    raise NfvoException(result, "Error creating VIM instance" + vm_id)
                vm['vim_id'] = vm_id
                rollbackList.append({'what':'vm','where':'vim','vim_id':datacenter_id,'uuid':vm_id})
                #put interface uuid back to scenario[vnfs][vms[[interfaces]
                for net in myVMDict['networks']:
                    if "vim_id" in net:
                        for iface in vm['interfaces']:
                            if net["name"]==iface["internal_name"]:
                                iface["vim_id"]=net["vim_id"]
                                break
        print "==================Deployment done=========="
        print yaml.safe_dump(scenarioDict, indent=4, default_flow_style=False)
        #r,c = mydb.new_instance_scenario_as_a_whole(nfvo_tenant,scenarioDict['name'],scenarioDict)
        result,c = mydb.new_instance_scenario_as_a_whole(tenant_id,instance_name, instance_description, scenarioDict)
        if result <0:
            raise NfvoException(result, c)
            
        return mydb.get_instance_scenario(c)
    except NfvoException as e:
        error_text = str(e) + ". " 
        _, message = rollback(mydb, vims, rollbackList)
        error_text += message
        print "create_instance: " + error_text
        return e.error_code, error_text

def delete_instance(mydb, tenant_id, instance_id):
    print "Checking that the instance_id exists and getting the instance dictionary"
    result, instanceDict = mydb.get_instance_scenario(instance_id, tenant_id)
    if result < 0:
        print "nfvo.delete_instance() error. Error getting info from database"
        return result, instanceDict
    elif result == 0:
        print "delete_instance error. Instance not found"
        return result, instanceDict
    print yaml.safe_dump(instanceDict, indent=4, default_flow_style=False)
    tenant_id = instanceDict["tenant_id"]
    print "Checking that nfvo_tenant_id exists and getting the VIM URI and the VIM tenant_id"
    result, vims = get_vim(mydb, tenant_id, instanceDict['datacenter_id'])
    if result < 0:
        print "nfvo.delete_instance() error. Datacenter not found"
        return result, vims
    elif result == 0:
        print "!!!!!! nfvo.delete_instance() datacenter not found!!!!" 
        myvim = None
    else:
        myvim = vims.values()[0]
    
    
    #1. Delete from Database

    #result,c = mydb.delete_row('instance_scenarios', instance_id, nfvo_tenant)
    result,c = mydb.delete_instance_scenario(instance_id, tenant_id)
    if result<0:
        return result, c

    #2. delete from VIM
    if not myvim:
        error_msg = "Not possible to delete VIM VMs and networks. Datacenter not found at database!!!"
    else:
        error_msg = ""

    #2.1 deleting VMs
    #vm_fail_list=[]
    for sce_vnf in instanceDict['vnfs']:
        if not myvim:
            continue
        for vm in sce_vnf['vms']:
            result, vm_id = myvim.delete_tenant_vminstance(vm['vim_vm_id'])
            if result < 0:
                error_msg+="\n    Error: " + str(-result) + " VM id=" + vm['vim_vm_id']
                #if result != -HTTP_Not_Found: vm_fail_list.append(vm)
                print "Error " + str(-result) + " deleting VM instance '" + vm['name'] + "', uuid '" + vm['uuid'] + "', VIM id '" + vm['vim_vm_id'] + "', from VNF_id '" + sce_vnf['vnf_id'] + "':"  + vm_id
    
    #2.2 deleting NETS
    #net_fail_list=[]
    for net in instanceDict['nets']:
        if net['external']:
            continue #skip not created nets
        if not myvim:
            continue
        result, net_id = myvim.delete_tenant_network(net['vim_net_id'])
        if result < 0:
            error_msg += "\n    Error: " + str(-result) + " NET id=" + net['vim_net_id']
            #if result == -HTTP_Not_Found: net_fail_list.append(net)
            print "Error " + str(-result) + " deleting NET uuid '" + net['uuid'] + "', VIM id '" + net['vim_net_id'] + "':"  + net_id

    if len(error_msg)>0:
        return 1, 'instance ' + instance_id + ' deleted but some elements could not be deleted, or already deleted (error: 404) from VIM: ' + error_msg
    else:
        return 1, 'instance ' + instance_id + ' deleted'

def refresh_instance(mydb, nfvo_tenant, instanceDict, datacenter=None, vim_tenant=None):
    '''Refreshes a scenario instance. It modifies instanceDict'''
    '''Returns:
         - result: <0 if there is any unexpected error, n>=0 if no errors where n is the number of vms and nets that couldn't be updated in the database
         - error_msg
    '''
    # Assumption: nfvo_tenant and instance_id were checked before entering into this function
    print "nfvo.refresh_instance begins"
    #print json.dumps(instanceDict, indent=4)
    
    print "Getting the VIM URL and the VIM tenant_id"
    result, vims = get_vim(mydb, nfvo_tenant, instanceDict['datacenter_id'])
    if result < 0:
        print "nfvo.refresh_instance() error. Datacenter not found"
        return result, vims
    elif result == 0:
        return -HTTP_Not_Found, "datacenter '%s' not found" % str(instanceDict['datacenter_id'])
    myvim = vims.values()[0]
     
    # 1. Getting the status of all VMs
    vmDict = {}
    netDict = {}
    for sce_vnf in instanceDict['vnfs']:
        for vm in sce_vnf['vms']:
            vmDict[vm['vim_vm_id']]=None
            print "VACA vm", vm
    
    # 2. Getting the status of all nets
    # TODO: update nets inside a vnf
    for net in instanceDict['nets']:
        #if net['external']:
        #    continue #skip not created nets
        netDict[net['vim_net_id']]=None
 
    # 3. Refresh the status of VMs and nets from VIM. IT updates vmDict and netDict
    result, refresh_message = myvim.refresh_tenant_vms_and_nets(vmDict, netDict)
    if result < 0:
        return result, refresh_message
    
    # 4. Update the status of VMs in the instanceDict, while collects the VMs whose status changed     
    vms_updated = [] #List of VM instance uuids in openmano that were updated
    vms_notupdated=[]
    for sce_vnf in instanceDict['vnfs']:
        for vm in sce_vnf['vms']:
            vm_id = vm['vim_vm_id']
            interfaces = vmDict[vm_id].pop('interfaces', [])
            #4.0 look if contain manamgement interface, and if not change status from ACTIVE:NoMgmtIP to ACTIVE
            has_mgmt_iface = False
            for iface in vm["interfaces"]:
                if iface["type"]=="mgmt":
                    has_mgmt_iface = True
            if vmDict[vm_id]['status'] == "ACTIVE:NoMgmtIP" and not has_mgmt_iface:
                    vmDict[vm_id]['status'] = "ACTIVE"
            if vm['status'] != vmDict[vm_id]['status'] or vm.get('error_msg')!=vmDict[vm_id].get('error_msg') or vm.get('vim_info')!=vmDict[vm_id].get('vim_info'):
                vm['status']    = vmDict[vm_id]['status']
                vm['error_msg'] = vmDict[vm_id].get('error_msg')
                vm['vim_info']  = vmDict[vm_id].get('vim_info')
                # 4.1. Update in openmano DB the VMs whose status changed
                result2, _ = mydb.update_rows('instance_vms', UPDATE=vmDict[vm_id], WHERE={'uuid':vm["uuid"]})
                if result2<0:
                    vms_notupdated.append(vm["uuid"])
                elif result2>0:
                    vms_updated.append(vm["uuid"])  
            # 4.2. Update in openmano DB the interface VMs
            for interface in interfaces:
                #translate from vim_net_id to instance_net_id
                network_id=None
                for net in instanceDict['nets']:
                    if net["vim_net_id"] == interface["vim_net_id"]:
                        network_id = net["uuid"]
                        break
                if not network_id:
                    continue
                del interface["vim_net_id"]
                result2, _ = mydb.update_rows('instance_interfaces', UPDATE=interface, WHERE={'instance_vm_id':vm["uuid"], "instance_net_id":network_id})
                if result2<0:
                    print "nfvo.refresh_instance error with vm=%s, interface_net_id=%s" % (vm["uuid"], network_id)
    # 5. Update the status of nets in the instanceDict, while collects the nets whose status changed     
    nets_updated = [] #List of net instance uuids in openmano that were updated
    nets_notupdated=[]
    # TODO: update nets inside a vnf  
    for net in instanceDict['nets']:
        net_id = net['vim_net_id']
        if net['status'] != netDict[net_id]['status'] or net.get('error_msg')!=netDict[net_id].get('error_msg') or net.get('vim_info')!=netDict[net_id].get('vim_info'):
            net['status']    = netDict[net_id]['status']
            net['error_msg'] = netDict[net_id].get('error_msg')
            net['vim_info']  = netDict[net_id].get('vim_info')
            # 5.1. Update in openmano DB the nets whose status changed
            result2, _ = mydb.update_rows('instance_nets', UPDATE=netDict[net_id], WHERE={'uuid':net["uuid"]})
            if result2<0:
                nets_notupdated.append(net["uuid"])
            elif result2>0:
                nets_updated.append(net["uuid"])  

    # Returns appropriate output
    print "nfvo.refresh_instance finishes"
    print "VMs updated in the database: %s; nets updated in the database %s; VMs not updated: %s; nets not updated: %s" \
                % (str(vms_updated), str(nets_updated), str(vms_notupdated), str(nets_notupdated)) 
    instance_id = instanceDict['uuid']
    error_msg=refresh_message
    if len(vms_notupdated)+len(nets_notupdated)>0:
        if len(refresh_message)>0:
            error_msg += "; "
        error_msg += "VMs not updated: " + str(vms_notupdated) + "; nets not updated: " + str(nets_notupdated)
        return len(vms_notupdated)+len(nets_notupdated), 'Scenario instance ' + instance_id + ' refreshed but some elements could not be updated in the database: ' + error_msg
    
    return 0, 'Scenario instance ' + instance_id + ' refreshed. ' + error_msg

def instance_action(mydb,nfvo_tenant,instance_id, action_dict):
    print "Checking that the instance_id exists and getting the instance dictionary"
    result, instanceDict = mydb.get_instance_scenario(instance_id, nfvo_tenant)
    if result < 0:
        print "nfvo.instance_action() error. Error getting info from database"
        return result, instanceDict
    elif result == 0:
        print "instance_action error. Instance not found"
        return -HTTP_Not_Found, "instance %s not found" % instance_id
    #print yaml.safe_dump(instanceDict, indent=4, default_flow_style=False)

    print "Checking that nfvo_tenant_id exists and getting the VIM URI and the VIM tenant_id"
    result, vims = get_vim(mydb, nfvo_tenant, instanceDict['datacenter_id'])
    if result < 0:
        print "nfvo.instance_action() error. Datacenter not found"
        return result, vims
    elif result == 0:
        return -HTTP_Not_Found, "datacenter '%s' not found" % str(instanceDict['datacenter_id'])
    myvim = vims.values()[0]
    

    input_vnfs = action_dict.pop("vnfs", [])
    input_vms = action_dict.pop("vms", [])
    action_over_all = True if len(input_vnfs)==0 and len (input_vms)==0 else False
    vm_result = {}
    vm_error = 0
    vm_ok = 0
    for sce_vnf in instanceDict['vnfs']:
        for vm in sce_vnf['vms']:
            if not action_over_all:
                if sce_vnf['uuid'] not in input_vnfs and sce_vnf['vnf_name'] not in input_vnfs and \
                    vm['uuid'] not in input_vms and vm['name'] not in input_vms:
                    continue
            result, data = myvim.action_tenant_vminstance(vm['vim_vm_id'], action_dict)
            if result < 0:
                vm_result[ vm['uuid'] ] = {"vim_result": -result, "name":vm['name'], "description": data}
                vm_error+=1
            else:
                if "console" in action_dict:
                    if data["server"]=="127.0.0.1" or data["server"]=="localhost":
                        vm_result[ vm['uuid'] ] = {"vim_result": -HTTP_Unauthorized,
                                                   "description": "this console is only reachable by local interface",
                                                   "name":vm['name']
                                                }
                        vm_error+=1
                        continue
                    #print "console data", data
                    r2, console_thread = create_or_use_console_proxy_thread(data["server"], data["port"])
                    if r2<0:
                        vm_result[ vm['uuid'] ] = {"vim_result": -r2, "name":vm['name'], "description": console_thread}
                    else:
                        vm_result[ vm['uuid'] ] = {"vim_result": result,
                                                   "description": "%s//%s:%d/%s" %(data["protocol"], console_thread.host, console_thread.port, data["suffix"]),
                                                   "name":vm['name']
                                                }
                        vm_ok +=1
                else:
                    vm_result[ vm['uuid'] ] = {"vim_result": result, "description": "ok", "name":vm['name']}
                    vm_ok +=1

    if vm_ok==0: #all goes wrong
        return 1, vm_result
    else:
        return 1, vm_result
    
def create_or_use_console_proxy_thread(console_server, console_port):
    #look for a non-used port
    console_thread_key = console_server + ":" + str(console_port)
    if console_thread_key in global_config["console_thread"]:
        #global_config["console_thread"][console_thread_key].start_timeout()
        return 1, global_config["console_thread"][console_thread_key]
    
    for port in  global_config["console_port_iterator"]():
        print "create_or_use_console_proxy_thread() port:", port
        if port in global_config["console_ports"]:
            continue
        try:
            clithread = cli.ConsoleProxyThread(global_config['http_host'], port, console_server, console_port)
            clithread.start()
            global_config["console_thread"][console_thread_key] = clithread
            global_config["console_ports"][port] = console_thread_key
            return 1, clithread
        except cli.ConsoleProxyExceptionPortUsed as e:
            #port used, try with onoher
            continue
        except cli.ConsoleProxyException as e:
            return -1, str(e)
    return -1, "Not found any free 'http_console_ports'"

def check_tenant(mydb, tenant_id):
    '''check that tenant exists at database'''
    result, _ = mydb.get_table(FROM='nfvo_tenants', SELECT=('uuid',), WHERE={'uuid': tenant_id})
    if result<=0: return False
    return True

def new_tenant(mydb, tenant_dict):
    result, tenant_id = mydb.new_row("nfvo_tenants", tenant_dict, None, add_uuid=True, log=True)
    if result < 0:
        return result, tenant_id
    return 200,tenant_id

def delete_tenant(mydb, tenant):
    #get nfvo_tenant info
    result,tenant_dict = mydb.get_table_by_uuid_name('nfvo_tenants', tenant, 'tenant')
    if result < 0:
        return result, tenant_dict

    result, tenant_id = mydb.delete_row("nfvo_tenants", tenant_dict['uuid'], None)
    if result < 0:
        return result, tenant_id
    return 200, tenant_dict['uuid']

def new_datacenter(mydb, datacenter_descriptor):
    if "config" in datacenter_descriptor:
        datacenter_descriptor["config"]=yaml.safe_dump(datacenter_descriptor["config"],default_flow_style=True,width=256)
    result, datacenter_id = mydb.new_row("datacenters", datacenter_descriptor, None, add_uuid=True, log=True)
    if result < 0:
        return result, datacenter_id
    return 200,datacenter_id

def edit_datacenter(mydb, datacenter_id_name, datacenter_descriptor):
    #obtain data, check that only one exist
    result, content = mydb.get_table_by_uuid_name('datacenters', datacenter_id_name)
    if result < 0:
        return result, content
    #edit data 
    datacenter_id = content['uuid']
    where={'uuid': content['uuid']}
    if "config" in datacenter_descriptor:
        if datacenter_descriptor['config']!=None:
            try:
                new_config_dict = datacenter_descriptor["config"]
                #delete null fields
                to_delete=[]
                for k in new_config_dict:
                    if new_config_dict[k]==None:
                        to_delete.append(k)
                
                config_dict = yaml.load(content["config"])
                config_dict.update(new_config_dict)
                #delete null fields
                for k in to_delete:
                    del config_dict[k]
            except Exception,e:
                return -HTTP_Bad_Request, "Bad format at datacenter:config " + str(e)
        datacenter_descriptor["config"]= yaml.safe_dump(config_dict,default_flow_style=True,width=256) if len(config_dict)>0 else None
    result, content = mydb.update_rows('datacenters', datacenter_descriptor, where)
    if result < 0:
        return result, datacenter_id
    return 200, datacenter_id

def delete_datacenter(mydb, datacenter):
    #get nfvo_tenant info
    result,datacenter_dict = mydb.get_table_by_uuid_name('datacenters', datacenter, 'datacenter')
    if result < 0:
        return result, datacenter_dict

    result, datacenter_id = mydb.delete_row("datacenters", datacenter_dict['uuid'], None)
    if result < 0:
        return result, datacenter_id
    return 200, datacenter_dict['uuid']

def associate_datacenter_to_tenant(mydb, nfvo_tenant, datacenter, vim_tenant_id=None, vim_tenant_name=None, vim_username=None, vim_password=None):
    #get datacenter info
    if af.check_valid_uuid(datacenter): 
        result, vims = get_vim(mydb, datacenter_id=datacenter)
    else:
        result, vims = get_vim(mydb, datacenter_name=datacenter)
    if result < 0:
        print "nfvo.associate_datacenter_to_tenant() error. Datacenter not found"
        return result, vims
    elif result == 0:
        return -HTTP_Not_Found, "datacenter '%s' not found" % str(datacenter)
    elif result>1:
        print "nfvo.associate_datacenter_to_tenant() error. Several datacenters found"
        #print result, vims
        return -HTTP_Conflict, "More than one datacenters found, try to identify with uuid"
    datacenter_id=vims.keys()[0]
    myvim=vims[datacenter_id]
    datacenter_name=myvim["name"]
    
    create_vim_tenant=True if vim_tenant_id==None and vim_tenant_name==None else False

    #get nfvo_tenant info
    result,tenant_dict = mydb.get_table_by_uuid_name('nfvo_tenants', nfvo_tenant)
    if result < 0:
        return result, tenant_dict
    if vim_tenant_name==None:
        vim_tenant_name=tenant_dict['name']
        
    #check that this association does not exist before
    tenants_datacenter_dict={"nfvo_tenant_id":tenant_dict['uuid'], "datacenter_id":datacenter_id }
    result,content = mydb.get_table(FROM='tenants_datacenters', WHERE=tenants_datacenter_dict)
    if result>0:
        return -HTTP_Conflict, "datacenter %s and tenant %s are already attached" %(datacenter_id, tenant_dict['uuid'])
    elif result<0:
        return result, content

    vim_tenant_id_exist_atdb=False
    if not create_vim_tenant:
        where_={"datacenter_id": datacenter_id}
        if vim_tenant_id!=None:
            where_["vim_tenant_id"] = vim_tenant_id
        if vim_tenant_name!=None:
            where_["vim_tenant_name"] = vim_tenant_name
        #check if vim_tenant_id is already at database
        result,datacenter_tenants_dict = mydb.get_table(FROM='datacenter_tenants', WHERE=where_)
        if result < 0:
            return result, datacenter_tenants_dict
        elif result>=1:
            datacenter_tenants_dict = datacenter_tenants_dict[0]
            vim_tenant_id_exist_atdb=True
            #TODO check if a field has changed and edit entry at datacenter_tenants at DB
        else: #result=0
            datacenter_tenants_dict = {}
            #insert at table datacenter_tenants
    else: #if vim_tenant_id==None:
        #create tenant at VIM if not provided
        res, vim_tenant_id = myvim.new_tenant(vim_tenant_name, "created by openmano for datacenter "+datacenter_name)
        if res < 0:
            return res, "Not possible to create vim_tenant in VIM " + vim_tenant_id
        datacenter_tenants_dict = {}
        datacenter_tenants_dict["created"]="true"
    
    #fill datacenter_tenants table
    if not vim_tenant_id_exist_atdb:
        datacenter_tenants_dict["vim_tenant_id"]   = vim_tenant_id
        datacenter_tenants_dict["vim_tenant_name"] = vim_tenant_name
        datacenter_tenants_dict["user"]            = vim_username
        datacenter_tenants_dict["passwd"]          = vim_password
        datacenter_tenants_dict["datacenter_id"]   = datacenter_id
        res,id_ = mydb.new_row('datacenter_tenants', datacenter_tenants_dict, tenant_dict['uuid'], True, True)
        if res<1:
            return -HTTP_Bad_Request, "Not possible to add %s to database datacenter_tenants table %s " %(vim_tenant_id, id_)
        datacenter_tenants_dict["uuid"] = id_
    
    #fill tenants_datacenters table
    tenants_datacenter_dict["datacenter_tenant_id"]=datacenter_tenants_dict["uuid"]
    res,id_ = mydb.new_row('tenants_datacenters', tenants_datacenter_dict, tenant_dict['uuid'], False, True)
    if res<1:
        return -HTTP_Bad_Request, "Not possible to create an entry at database table datacenter_tenants: " + id_
    return 200, datacenter_id

def deassociate_datacenter_to_tenant(mydb, tenant_id, datacenter, vim_tenant_id=None):
    #get datacenter info
    if af.check_valid_uuid(datacenter): 
        result, vims = get_vim(mydb, datacenter_id=datacenter)
    else:
        result, vims = get_vim(mydb, datacenter_name=datacenter)
    if result < 0:
        print "nfvo.deassociate_datacenter_to_tenant() error. Datacenter not found"
        return result, vims
    elif result == 0:
        return -HTTP_Not_Found, "datacenter '%s' not found" % str(datacenter)
    elif result>1:
        print "nfvo.deassociate_datacenter_to_tenant() error. Several datacenters found"
        return -HTTP_Conflict, "More than one datacenters found, try to identify with uuid"
    datacenter_id=vims.keys()[0]
    myvim=vims[datacenter_id]

    #get nfvo_tenant info
    if not tenant_id or tenant_id=="any":
        tenant_uuid = None
    else:
        result,tenant_dict = mydb.get_table_by_uuid_name('nfvo_tenants', tenant_id)
        if result < 0:
            return result, tenant_dict
        tenant_uuid = tenant_dict['uuid']

    #check that this association exist before
    tenants_datacenter_dict={"datacenter_id":datacenter_id }
    if tenant_uuid:
        tenants_datacenter_dict["nfvo_tenant_id"] = tenant_uuid
    result,tenant_datacenter_list = mydb.get_table(FROM='tenants_datacenters', WHERE=tenants_datacenter_dict)
    if result==0 and tenant_uuid:
        return -HTTP_Not_Found, "datacenter %s and tenant %s are not  attached" %(datacenter_id, tenant_dict['uuid'])
    elif result<0:
        return result, tenant_datacenter_list

    #delete this association
    result,data = mydb.delete_row_by_dict(FROM='tenants_datacenters', WHERE=tenants_datacenter_dict)
    if result<0:
        return result,data

    #get vim_tenant info and deletes
    warning=''
    for tenant_datacenter_item in tenant_datacenter_list:
        result,vim_tenant_dict = mydb.get_table_by_uuid_name('datacenter_tenants', tenant_datacenter_item['datacenter_tenant_id'])
        if result > 0:
            #try to delete vim:tenant
            result,data = mydb.delete_row('datacenter_tenants', tenant_datacenter_item['datacenter_tenant_id'], tenant_uuid)
            if result<0:
                pass #the error will be caused because dependencies, vim_tenant can not be deleted
            elif vim_tenant_dict['created']=='true':
                #delete tenant at VIM if created by NFVO
                res, vim_tenant_id = myvim.delete_tenant(vim_tenant_dict['vim_tenant_id'])
                if res < 0:
                    warning = " Not possible to delete vim_tenant id %s name %s from VIM: %s " % (vim_tenant_dict['vim_tenant_id'], vim_tenant_dict['vim_tenant_name'], vim_tenant_id)
                    print res, warning

    return 200, "datacenter %s detached.%s" %(datacenter_id, warning)

def datacenter_action(mydb, tenant_id, datacenter, action_dict):
    #DEPRECATED
    #get datacenter info    
    if af.check_valid_uuid(datacenter): 
        result, vims = get_vim(mydb, nfvo_tenant=tenant_id, datacenter_id=datacenter)
    else:
        result, vims = get_vim(mydb, nfvo_tenant=tenant_id, datacenter_name=datacenter)
    if result < 0:
        print "nfvo.datacenter_action() error. Datacenter not found"
        return result, vims
    elif result == 0:
        return -HTTP_Not_Found, "datacenter '%s' not found" % str(datacenter)
    elif result>1:
        print "nfvo.datacenter_action() error. Several datacenters found"
        return -HTTP_Conflict, "More than one datacenters found, try to identify with uuid"
    datacenter_id=vims.keys()[0]
    myvim=vims[datacenter_id]

    if 'net-update' in action_dict:
        result, content = myvim.get_network_list(filter_dict={'shared': True, 'admin_state_up': True, 'status': 'ACTIVE'})
        print content
        if result < 0:
            print " Not possible to get_network_list from VIM: %s " % (content)
            return -HTTP_Internal_Server_Error, content
        #update nets Change from VIM format to NFVO format
        net_list=[]
        for net in content:
            net_nfvo={'datacenter_id': datacenter_id}
            net_nfvo['name']       = net['name']
            #net_nfvo['description']= net['name']
            net_nfvo['vim_net_id'] = net['id']
            net_nfvo['type']       = net['type'][0:6] #change from ('ptp','data','bridge_data','bridge_man')  to ('bridge','data','ptp')
            net_nfvo['shared']     = net['shared']
            net_nfvo['multipoint'] = False if net['type']=='ptp' else True
            net_list.append(net_nfvo)
        result, content = mydb.update_datacenter_nets(datacenter_id, net_list)
        if result < 0:
            return -HTTP_Internal_Server_Error, content
        print "Inserted %d nets, deleted %d old nets" % (result, content)
                
        return 200, result
    elif 'net-edit' in action_dict:
        net = action_dict['net-edit'].pop('net')
        what = 'vim_net_id' if af.check_valid_uuid(net) else 'name'
        result, content = mydb.update_rows('datacenter_nets', action_dict['net-edit'], 
                                WHERE={'datacenter_id':datacenter_id, what: net})
        return result, content
    elif 'net-delete' in action_dict:
        net = action_dict['net-deelte'].get('net')
        what = 'vim_net_id' if af.check_valid_uuid(net) else 'name'
        result, content = mydb.delete_row_by_dict(FROM='datacenter_nets', 
                                WHERE={'datacenter_id':datacenter_id, what: net})
        return result, content

    else:
        return -HTTP_Bad_Request, "Unknown action " + str(action_dict)

def datacenter_edit_netmap(mydb, tenant_id, datacenter, netmap, action_dict):
    #get datacenter info
    if af.check_valid_uuid(datacenter): 
        result, vims = get_vim(mydb, nfvo_tenant=tenant_id, datacenter_id=datacenter)
    else:
        result, vims = get_vim(mydb, nfvo_tenant=tenant_id, datacenter_name=datacenter)
    if result < 0:
        print "nfvo.datacenter_action() error. Datacenter not found"
        return result, vims
    elif result == 0:
        return -HTTP_Not_Found, "datacenter '%s' not found" % str(datacenter)
    elif result>1:
        print "nfvo.datacenter_action() error. Several datacenters found"
        return -HTTP_Conflict, "More than one datacenters found, try to identify with uuid"
    datacenter_id=vims.keys()[0]

    what = 'uuid' if af.check_valid_uuid(netmap) else 'name'
    result, content = mydb.update_rows('datacenter_nets', action_dict['netmap'], 
                            WHERE={'datacenter_id':datacenter_id, what: netmap})
    return result, content

def datacenter_new_netmap(mydb, tenant_id, datacenter, action_dict=None):
    #get datacenter info
    if af.check_valid_uuid(datacenter): 
        result, vims = get_vim(mydb, nfvo_tenant=tenant_id, datacenter_id=datacenter)
    else:
        result, vims = get_vim(mydb, nfvo_tenant=tenant_id, datacenter_name=datacenter)
    if result < 0:
        print "nfvo.datacenter_new_netmap() error. Datacenter not found"
        return result, vims
    elif result == 0:
        return -HTTP_Not_Found, "datacenter '%s' not found" % str(datacenter)
    elif result>1:
        print "nfvo.datacenter_new_netmap() error. Several datacenters found"
        return -HTTP_Conflict, "More than one datacenters found, try to identify with uuid"
    datacenter_id=vims.keys()[0]
    myvim=vims[datacenter_id]
    filter_dict={}
    if action_dict:
        action_dict = action_dict["netmap"]
        if 'vim_id' in action_dict:
            filter_dict["id"] = action_dict['vim_id']
        if 'vim_name' in action_dict:
            filter_dict["name"] = action_dict['vim_name']
    else:
        filter_dict["shared"] = True
    
    result, content = myvim.get_network_list(filter_dict=filter_dict)
    print content
    if result != 200:
        print " Not possible to get_network_list from VIM: %s " % (content)
        return -HTTP_Internal_Server_Error, content
    elif len(content)>1 and action_dict:
        return -HTTP_Conflict, "more than two networks found, specify with vim_id"
    elif len(content)==0: # and action_dict:
        return -HTTP_Not_Found, "Not found a network at VIM with " + str(filter_dict)
    net_list=[]
    for net in content:
        net_nfvo={'datacenter_id': datacenter_id}
        if action_dict and "name" in action_dict:
            net_nfvo['name']       = action_dict['name']
        else:
            net_nfvo['name']       = net['name']
        #net_nfvo['description']= net['name']
        net_nfvo['vim_net_id'] = net['id']
        net_nfvo['type']       = net['type'][0:6] #change from ('ptp','data','bridge_data','bridge_man')  to ('bridge','data','ptp')
        net_nfvo['shared']     = net['shared']
        net_nfvo['multipoint'] = False if net['type']=='ptp' else True
        result, content = mydb.new_row("datacenter_nets", net_nfvo, add_uuid=True)
        if action_dict and result < 0 :
            return result, content
        if result < 0:
            net_nfvo["status"] = "FAIL: " + content
        else:
            net_nfvo["status"] = "OK"
            net_nfvo["uuid"] = content
        net_list.append(net_nfvo)                         
    return 200, net_list        

def vim_action_get(mydb, tenant_id, datacenter, item, name):
    #get datacenter info
    if af.check_valid_uuid(datacenter): 
        result, vims = get_vim(mydb, nfvo_tenant=tenant_id, datacenter_id=datacenter)
    else:
        result, vims = get_vim(mydb, nfvo_tenant=tenant_id, datacenter_name=datacenter)
    if result < 0:
        print "nfvo.datacenter_action() error. Datacenter not found"
        return result, vims
    elif result == 0:
        return -HTTP_Not_Found, "datacenter '%s' not found" % str(datacenter)
    elif result>1:
        print "nfvo.datacenter_action() error. Several datacenters found"
        return -HTTP_Conflict, "More than one datacenters found, try to identify with uuid"
    datacenter_id=vims.keys()[0]
    myvim=vims[datacenter_id]
    filter_dict={}
    if name:
        if af.check_valid_uuid(name):
            filter_dict["id"] = name
        else:
            filter_dict["name"] = name
    if item=="networks":
        filter_dict['tenant_id'] = myvim["tenant"]
        result, content = myvim.get_network_list(filter_dict=filter_dict)
    elif item=="tenants":
        result, content = myvim.get_tenant_list(filter_dict=filter_dict)
    else:
        return -HTTP_Method_Not_Allowed, item + "?" 
    if result < 0:
        print "vim_action Not possible to get_%s_list from VIM: %s " % (item, content)
        return -HTTP_Internal_Server_Error, content
    print "vim_action response ", content #update nets Change from VIM format to NFVO format
    if name and len(content)==1:
        return 200, {item[:-1]: content[0]}
    elif name and len(content)==0:
        return -HTTP_Not_Found, "No %s found with %s" % (item[:-1], " and ".join(map(lambda x: str(x[0])+": "+str(x[1]), filter_dict.iteritems())))
    else:
        return 200, {item: content}
    
def vim_action_delete(mydb, tenant_id, datacenter, item, name):
    #get datacenter info
    if af.check_valid_uuid(datacenter): 
        result, vims = get_vim(mydb, nfvo_tenant=tenant_id, datacenter_id=datacenter)
    else:
        result, vims = get_vim(mydb, nfvo_tenant=tenant_id, datacenter_name=datacenter)
    if result < 0:
        print "nfvo.datacenter_action() error. Datacenter not found"
        return result, vims
    elif result == 0:
        return -HTTP_Not_Found, "datacenter '%s' not found" % str(datacenter)
    elif result>1:
        print "nfvo.datacenter_action() error. Several datacenters found"
        return -HTTP_Conflict, "More than one datacenters found, try to identify with uuid"
    datacenter_id=vims.keys()[0]
    myvim=vims[datacenter_id]
    #get uuid
    if not af.check_valid_uuid(name):
        result, content = vim_action_get(mydb, tenant_id, datacenter, item, name)
        print content
        if result < 0:
            return result, content
        items = content.values()[0]
        if type(items)==list and len(items)==0:
            return -HTTP_Not_Found, "Not found " + item
        elif type(items)==list and len(items)>1:
            return -HTTP_Not_Found, "Found more than one %s with this name. Use uuid." % item
        else: # it is a dict
            item_id = items["id"]
            item_name = str(items.get("name"))
        
    if item=="networks":
        result, content = myvim.delete_tenant_network(item_id)
    elif item=="tenants":
        result, content = myvim.delete_tenant(item_id)
    else:
        return -HTTP_Method_Not_Allowed, item + "?"    
    if result < 0:
        print "vim_action Not possible to delete %s %s from VIM: %s " % (item, name, content)
        return result, content
    return 200, "%s %s %s deleted" %( item[:-1], item_id,item_name)
    
def vim_action_create(mydb, tenant_id, datacenter, item, descriptor):
    #get datacenter info
    print "vim_action_create descriptor", descriptor
    if af.check_valid_uuid(datacenter): 
        result, vims = get_vim(mydb, nfvo_tenant=tenant_id, datacenter_id=datacenter)
    else:
        result, vims = get_vim(mydb, nfvo_tenant=tenant_id, datacenter_name=datacenter)
    if result < 0:
        print "nfvo.datacenter_action() error. Datacenter not found"
        return result, vims
    elif result == 0:
        return -HTTP_Not_Found, "datacenter '%s' not found" % str(datacenter)
    elif result>1:
        print "nfvo.datacenter_action() error. Several datacenters found"
        return -HTTP_Conflict, "More than one datacenters found, try to identify with uuid"
    datacenter_id=vims.keys()[0]
    myvim=vims[datacenter_id]
    
    if item=="networks":
        net = descriptor["network"]
        net_name = net.pop("name")
        net_type = net.pop("type", "bridge")
        net_public=net.pop("shared", False)
        result, content = myvim.new_tenant_network(net_name, net_type, net_public, **net)
    elif item=="tenants":
        tenant = descriptor["tenant"]
        result, content = myvim.new_tenant(tenant["name"], tenant.get("description"))
    else:
        return -HTTP_Method_Not_Allowed, item + "?"    
    if result < 0:
        print "vim_action Not possible to create %s at VIM: %s " % (item, content)
        return result, content
    return vim_action_get(mydb, tenant_id, datacenter, item, content)