osm_openvim/httpserver.py

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

##
# Copyright 2015 Telefónica Investigación y Desarrollo, S.A.U.
# This file is part of openvim
# 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
##

'''
This is the thread for the http server North API. 
Two thread will be launched, with normal and administrative permissions.
'''

__author__="Alfonso Tierno, Gerardo Garcia, Leonardo Mirabal"
__date__ ="$10-jul-2014 12:07:15$"

import bottle
import urlparse
import yaml
import json
import threading
import datetime
import hashlib
import os
import imp
from netaddr import IPNetwork, IPAddress, all_matching_cidrs
#import only if needed because not needed in test mode. To allow an easier installation   import RADclass
from jsonschema import validate as js_v, exceptions as js_e
import host_thread as ht
from vim_schema import host_new_schema, host_edit_schema, tenant_new_schema, \
    tenant_edit_schema, \
    flavor_new_schema, flavor_update_schema, \
    image_new_schema, image_update_schema, \
    server_new_schema, server_action_schema, network_new_schema, network_update_schema, \
    port_new_schema, port_update_schema, openflow_controller_schema, of_port_map_new_schema
import ovim
import logging

global my
global url_base
global config_dic
global RADclass_module
RADclass_module=None  #RADclass module is charged only if not in test mode

url_base="/openvim"

HTTP_Bad_Request =          400
HTTP_Unauthorized =         401
HTTP_Not_Found =            404
HTTP_Forbidden =            403
HTTP_Method_Not_Allowed =   405
HTTP_Not_Acceptable =       406
HTTP_Request_Timeout =      408
HTTP_Conflict =             409
HTTP_Service_Unavailable =  503
HTTP_Internal_Server_Error= 500

def md5(fname):
    hash_md5 = hashlib.md5()
    with open(fname, "rb") as f:
        for chunk in iter(lambda: f.read(4096), b""):
            hash_md5.update(chunk)
    return hash_md5.hexdigest()

def md5_string(fname):
    hash_md5 = hashlib.md5()
    hash_md5.update(fname)
    return hash_md5.hexdigest()

def check_extended(extended, allow_net_attach=False):
    '''Makes and extra checking of extended input that cannot be done using jsonschema
    Attributes: 
        allow_net_attach:  for allowing or not the uuid field at interfaces
        that are allowed for instance, but not for flavors
    Return: (<0, error_text) if error; (0,None) if not error '''
    if "numas" not in extended: return 0, None
    id_s=[]
    numaid=0
    for numa in extended["numas"]:
        nb_formats = 0
        if "cores" in numa:
            nb_formats += 1
            if "cores-id" in numa:
                if len(numa["cores-id"]) != numa["cores"]:
                    return -HTTP_Bad_Request, "different number of cores-id (%d) than cores (%d) at numa %d" % (len(numa["cores-id"]), numa["cores"],numaid)
                id_s.extend(numa["cores-id"])
        if "threads" in numa:
            nb_formats += 1
            if "threads-id" in numa:
                if len(numa["threads-id"]) != numa["threads"]:
                    return -HTTP_Bad_Request, "different number of threads-id (%d) than threads (%d) at numa %d" % (len(numa["threads-id"]), numa["threads"],numaid) 
                id_s.extend(numa["threads-id"])
        if "paired-threads" in numa:
            nb_formats += 1
            if "paired-threads-id" in numa:
                if len(numa["paired-threads-id"]) != numa["paired-threads"]:
                    return -HTTP_Bad_Request, "different number of paired-threads-id (%d) than paired-threads (%d) at numa %d" % (len(numa["paired-threads-id"]), numa["paired-threads"],numaid) 
                for pair in numa["paired-threads-id"]:
                    if len(pair) != 2:
                        return -HTTP_Bad_Request, "paired-threads-id must contain a list of two elements list at numa %d" % (numaid) 
                    id_s.extend(pair)
        if nb_formats > 1:
            return -HTTP_Service_Unavailable, "only one of cores, threads,  paired-threads are allowed in this version at numa %d" % numaid 
        #check interfaces
        if "interfaces" in numa:
            ifaceid=0
            names=[]
            vpcis=[]
            for interface in numa["interfaces"]:
                if "uuid" in interface and not allow_net_attach: 
                    return -HTTP_Bad_Request, "uuid field is not allowed at numa %d interface %s position %d" % (numaid, interface.get("name",""), ifaceid )
                if "mac_address" in interface and interface["dedicated"]=="yes":
                    return -HTTP_Bad_Request, "mac_address can not be set for dedicated (passthrough) at numa %d, interface %s position %d" % (numaid, interface.get("name",""), ifaceid )
                if "name" in interface:
                    if interface["name"] in names:
                        return -HTTP_Bad_Request, "name repeated at numa %d, interface %s position %d" % (numaid, interface.get("name",""), ifaceid )
                    names.append(interface["name"])
                if "vpci" in interface:
                    if interface["vpci"] in vpcis:
                        return -HTTP_Bad_Request, "vpci %s repeated at numa %d, interface %s position %d" % (interface["vpci"], numaid, interface.get("name",""), ifaceid )
                    vpcis.append(interface["vpci"])
                ifaceid+=1
        numaid+=1
    if numaid > 1:
        return -HTTP_Service_Unavailable, "only one numa can be defined in this version " 
    for a in range(0,len(id_s)):
        if a not in id_s:
            return -HTTP_Bad_Request, "core/thread identifiers must start at 0 and gaps are not alloed. Missing id number %d" % a 
    
    return 0, None

#
# dictionaries that change from HTTP API to database naming
#
http2db_id={'id':'uuid'}
http2db_host={'id':'uuid'}
http2db_tenant={'id':'uuid'}
http2db_flavor={'id':'uuid','imageRef':'image_id', 'size': 'image_size'}
http2db_image={'id':'uuid', 'created':'created_at', 'updated':'modified_at', 'public': 'public'}
http2db_server={'id':'uuid','hostId':'host_id','flavorRef':'flavor_id','imageRef':'image_id','created':'created_at'}
http2db_network={'id':'uuid','provider:vlan':'vlan', 'provider:physical': 'provider'}
http2db_ofc = {'id': 'uuid'}
http2db_port={'id':'uuid', 'network_id':'net_id', 'mac_address':'mac', 'device_owner':'type','device_id':'instance_id','binding:switch_port':'switch_port','binding:vlan':'vlan', 'bandwidth':'Mbps'}


def remove_extra_items(data, schema):
    import re

    deleted=[]
    if type(data) is tuple or type(data) is list:
        for d in data:
            a= remove_extra_items(d, schema['items'])
            if a is not None: deleted.append(a)
    elif type(data) is dict:

        for k in data.keys():
            if 'patternProperties' in schema and k not in schema['properties'].keys():
                reg_ex_list = schema['patternProperties'].keys()
                for reg_ex in reg_ex_list:
                    if not re.match(reg_ex, k):
                        del data[k]
                        deleted.append(k)
            elif 'properties' not in schema or k not in schema['properties'].keys(): # or k not in schema['patternProperties'].keys():
                del data[k]
                deleted.append(k)
            else:
                a = remove_extra_items(data[k], schema['properties'][k])
                if a is not None:  deleted.append({k:a})
    if len(deleted) == 0: return None
    elif len(deleted) == 1: return deleted[0]
    else: return deleted


def delete_nulls(var):
    if type(var) is dict:
        for k in var.keys():
            if var[k] is None: del var[k]
            elif type(var[k]) is dict or type(var[k]) is list or type(var[k]) is tuple: 
                if delete_nulls(var[k]): del var[k]
        if len(var) == 0: return True
    elif type(var) is list or type(var) is tuple:
        for k in var:
            if type(k) is dict: delete_nulls(k)
        if len(var) == 0: return True
    return False


class httpserver(threading.Thread):
    def __init__(self, ovim, name="http", host='localhost', port=8080, admin=False, config_=None):
        '''
        Creates a new thread to attend the http connections
        Attributes:
            db_conn: database connection
            name: name of this thread
            host: ip or name where to listen
            port: port where to listen
            admin: if this has privileges of administrator or not 
            config_: unless the first thread must be provided. It is a global dictionary where to allocate the self variable 
        '''
        global url_base
        global config_dic
        
        #initialization
        if config_ is not None:
            config_dic = config_
        if 'http_threads' not in config_dic:
            config_dic['http_threads'] = {}
        threading.Thread.__init__(self)
        self.host = host
        self.port = port  
        self.db = ovim.db  #TODO OVIM remove
        self.ovim = ovim
        self.admin = admin
        if name in config_dic:
            print "httpserver Warning!!! Onether thread with the same name", name
            n=0
            while name+str(n) in config_dic:
                n +=1
            name +=str(n)
        self.name = name
        self.url_preffix = 'http://' + self.host + ':' + str(self.port) + url_base
        config_dic['http_threads'][name] = self

        #Ensure that when the main program exits the thread will also exit
        self.daemon = True      
        self.setDaemon(True)
        self.logger = logging.getLogger("openvim.http")
         
    def run(self):
        bottle.run(host=self.host, port=self.port, debug=True) #quiet=True
           
    def gethost(self, host_id):
        result, content = self.db.get_host(host_id)
        if result < 0:
            print "httpserver.gethost error %d %s" % (result, content)
            bottle.abort(-result, content)
        elif result==0:
            print "httpserver.gethost host '%s' not found" % host_id
            bottle.abort(HTTP_Not_Found, content)
        else:
            data={'host' : content}
            convert_boolean(content, ('admin_state_up',) )
            change_keys_http2db(content, http2db_host, reverse=True)
            print data['host']
            return format_out(data)

@bottle.route(url_base + '/', method='GET')
def http_get():
    print 
    return 'works' #TODO: put links or redirection to /openvim???

#
# Util funcions
#

def change_keys_http2db(data, http_db, reverse=False):
    '''Change keys of dictionary data according to the key_dict values
    This allow change from http interface names to database names.
    When reverse is True, the change is otherwise
    Attributes:
        data: can be a dictionary or a list
        http_db: is a dictionary with hhtp names as keys and database names as value
        reverse: by default change is done from http API to database. If True change is done otherwise
    Return: None, but data is modified'''
    if type(data) is tuple or type(data) is list:
        for d in data:
            change_keys_http2db(d, http_db, reverse)
    elif type(data) is dict or type(data) is bottle.FormsDict:
        if reverse:
            for k,v in http_db.items():
                if v in data: data[k]=data.pop(v)
        else:
            for k,v in http_db.items():
                if k in data: data[v]=data.pop(k)



def format_out(data):
    '''return string of dictionary data according to requested json, yaml, xml. By default json'''
    if 'application/yaml' in bottle.request.headers.get('Accept'):
        bottle.response.content_type='application/yaml'
        return yaml.safe_dump(data, explicit_start=True, indent=4, default_flow_style=False, tags=False, encoding='utf-8', allow_unicode=True) #, canonical=True, default_style='"'
    else: #by default json
        bottle.response.content_type='application/json'
        #return data #json no style
        return json.dumps(data, indent=4) + "\n"

def format_in(schema):
    try:
        error_text = "Invalid header format "
        format_type = bottle.request.headers.get('Content-Type', 'application/json')
        if 'application/json' in format_type:
            error_text = "Invalid json format "
            #Use the json decoder instead of bottle decoder because it informs about the location of error formats with a ValueError exception
            client_data = json.load(bottle.request.body)
            #client_data = bottle.request.json()
        elif 'application/yaml' in format_type:
            error_text = "Invalid yaml format "
            client_data = yaml.load(bottle.request.body)
        elif format_type == 'application/xml':
            bottle.abort(501, "Content-Type: application/xml not supported yet.")
        else:
            print "HTTP HEADERS: " + str(bottle.request.headers.items())
            bottle.abort(HTTP_Not_Acceptable, 'Content-Type ' + str(format_type) + ' not supported.')
            return
        #if client_data == None:
        #    bottle.abort(HTTP_Bad_Request, "Content error, empty")
        #    return
        #check needed_items

        #print "HTTP input data: ", str(client_data)
        error_text = "Invalid content "
        js_v(client_data, schema)

        return client_data
    except (ValueError, yaml.YAMLError) as exc:
        error_text += str(exc)
        print error_text 
        bottle.abort(HTTP_Bad_Request, error_text)
    except js_e.ValidationError as exc:
        print "HTTP validate_in error, jsonschema exception ", exc.message, "at", exc.path
        print "  CONTENT: " + str(bottle.request.body.readlines())
        error_pos = ""
        if len(exc.path)>0: error_pos=" at '" +  ":".join(map(str, exc.path)) + "'"
        bottle.abort(HTTP_Bad_Request, error_text + error_pos+": "+exc.message)
    #except:
    #    bottle.abort(HTTP_Bad_Request, "Content error: Failed to parse Content-Type",  error_pos)
    #    raise

def filter_query_string(qs, http2db, allowed):
    '''Process query string (qs) checking that contains only valid tokens for avoiding SQL injection
    Attributes:
        'qs': bottle.FormsDict variable to be processed. None or empty is considered valid
        'allowed': list of allowed string tokens (API http naming). All the keys of 'qs' must be one of 'allowed'
        'http2db': dictionary with change from http API naming (dictionary key) to database naming(dictionary value)
    Return: A tuple with the (select,where,limit) to be use in a database query. All of then transformed to the database naming
        select: list of items to retrieve, filtered by query string 'field=token'. If no 'field' is present, allowed list is returned
        where: dictionary with key, value, taken from the query string token=value. Empty if nothing is provided
        limit: limit dictated by user with the query string 'limit'. 100 by default
    abort if not permitted, using bottel.abort
    '''
    where = {}
    limit = 100
    select = []
    if type(qs) is not bottle.FormsDict:
        print '!!!!!!!!!!!!!!invalid query string not a dictionary'
        # bottle.abort(HTTP_Internal_Server_Error, "call programmer")
    else:
        for k in qs:
            if k == 'field':
                select += qs.getall(k)
                for v in select:
                    if v not in allowed:
                        bottle.abort(HTTP_Bad_Request, "Invalid query string at 'field=" + v + "'")
            elif k == 'limit':
                try:
                    limit = int(qs[k])
                except:
                    bottle.abort(HTTP_Bad_Request, "Invalid query string at 'limit=" + qs[k] + "'")
            else:
                if k not in allowed:
                    bottle.abort(HTTP_Bad_Request, "Invalid query string at '" + k + "=" + qs[k] + "'")
                if qs[k] != "null":
                    where[k] = qs[k]
                else:
                    where[k] = None
    if len(select) == 0: select += allowed
    # change from http api to database naming
    for i in range(0, len(select)):
        k = select[i]
        if k in http2db:
            select[i] = http2db[k]
    change_keys_http2db(where, http2db)
    # print "filter_query_string", select,where,limit

    return select, where, limit

def convert_bandwidth(data, reverse=False):
    '''Check the field bandwidth recursively and when found, it removes units and convert to number 
    It assumes that bandwidth is well formed
    Attributes:
        'data': dictionary bottle.FormsDict variable to be checked. None or empty is considered valid
        'reverse': by default convert form str to int (Mbps), if True it convert from number to units
    Return:
        None
    '''
    if type(data) is dict:
        for k in data.keys():
            if type(data[k]) is dict or type(data[k]) is tuple or type(data[k]) is list:
                convert_bandwidth(data[k], reverse)
        if "bandwidth" in data:
            try:
                value=str(data["bandwidth"])
                if not reverse:
                    pos = value.find("bps")
                    if pos>0:
                        if value[pos-1]=="G": data["bandwidth"] =  int(data["bandwidth"][:pos-1]) * 1000
                        elif value[pos-1]=="k": data["bandwidth"]= int(data["bandwidth"][:pos-1]) / 1000
                        else: data["bandwidth"]= int(data["bandwidth"][:pos-1])
                else:
                    value = int(data["bandwidth"])
                    if value % 1000 == 0: data["bandwidth"]=str(value/1000) + " Gbps"
                    else: data["bandwidth"]=str(value) + " Mbps"
            except:
                print "convert_bandwidth exception for type", type(data["bandwidth"]), " data", data["bandwidth"]
                return
    if type(data) is tuple or type(data) is list:
        for k in data:
            if type(k) is dict or type(k) is tuple or type(k) is list:
                convert_bandwidth(k, reverse)

def convert_boolean(data, items): #TODO OVIM delete
    '''Check recursively the content of data, and if there is an key contained in items, convert value from string to boolean 
    It assumes that bandwidth is well formed
    Attributes:
        'data': dictionary bottle.FormsDict variable to be checked. None or empty is consideted valid
        'items': tuple of keys to convert
    Return:
        None
    '''
    if type(data) is dict:
        for k in data.keys():
            if type(data[k]) is dict or type(data[k]) is tuple or type(data[k]) is list:
                convert_boolean(data[k], items)
            if k in items:
                if type(data[k]) is str:
                    if   data[k]=="false": data[k]=False
                    elif data[k]=="true":  data[k]=True
    if type(data) is tuple or type(data) is list:
        for k in data:
            if type(k) is dict or type(k) is tuple or type(k) is list:
                convert_boolean(k, items)

def convert_datetime2str(var):
    '''Converts a datetime variable to a string with the format '%Y-%m-%dT%H:%i:%s'
    It enters recursively in the dict var finding this kind of variables
    '''
    if type(var) is dict:
        for k,v in var.items():
            if type(v) is datetime.datetime:
                var[k]= v.strftime('%Y-%m-%dT%H:%M:%S')
            elif type(v) is dict or type(v) is list or type(v) is tuple: 
                convert_datetime2str(v)
        if len(var) == 0: return True
    elif type(var) is list or type(var) is tuple:
        for v in var:
            convert_datetime2str(v)

def check_valid_tenant(my, tenant_id):
    if tenant_id=='any':
        if not my.admin:
            return HTTP_Unauthorized, "Needed admin privileges"
    else:
        result, _ = my.db.get_table(FROM='tenants', SELECT=('uuid',), WHERE={'uuid': tenant_id})
        if result<=0:
            return HTTP_Not_Found, "tenant '%s' not found" % tenant_id
    return 0, None

def is_url(url):
    '''
    Check if string value is a well-wormed url
    :param url: string url
    :return: True if is a valid url, False if is not well-formed
    '''

    parsed_url = urlparse.urlparse(url)
    return parsed_url


@bottle.error(400)
@bottle.error(401) 
@bottle.error(404) 
@bottle.error(403)
@bottle.error(405) 
@bottle.error(406)
@bottle.error(408)
@bottle.error(409)
@bottle.error(503) 
@bottle.error(500)
def error400(error):
    e={"error":{"code":error.status_code, "type":error.status, "description":error.body}}
    return format_out(e)

@bottle.hook('after_request')
def enable_cors():
    #TODO: Alf: Is it needed??
    bottle.response.headers['Access-Control-Allow-Origin'] = '*'

#
# HOSTS
#

@bottle.route(url_base + '/hosts', method='GET')
def http_get_hosts():
    return format_out(get_hosts())


def get_hosts():
    select_, where_, limit_ = filter_query_string(bottle.request.query, http2db_host,
                                                  ('id', 'name', 'description', 'status', 'admin_state_up', 'ip_name'))
    
    myself = config_dic['http_threads'][ threading.current_thread().name ]
    result, content = myself.db.get_table(FROM='hosts', SELECT=select_, WHERE=where_, LIMIT=limit_)
    if result < 0:
        print "http_get_hosts Error", content
        bottle.abort(-result, content)
    else:
        convert_boolean(content, ('admin_state_up',) )
        change_keys_http2db(content, http2db_host, reverse=True)
        for row in content:
            row['links'] = ( {'href': myself.url_preffix + '/hosts/' + str(row['id']), 'rel': 'bookmark'}, )
        data={'hosts' : content}
        return data

@bottle.route(url_base + '/hosts/<host_id>', method='GET')
def http_get_host_id(host_id):
    my = config_dic['http_threads'][ threading.current_thread().name ]
    return my.gethost(host_id)

@bottle.route(url_base + '/hosts', method='POST')
def http_post_hosts():
    '''insert a host into the database. All resources are got and inserted'''
    global RADclass_module
    my = config_dic['http_threads'][ threading.current_thread().name ]
    #check permissions
    if not my.admin:
        bottle.abort(HTTP_Unauthorized, "Needed admin privileges")
    
    #parse input data
    http_content = format_in( host_new_schema )
    r = remove_extra_items(http_content, host_new_schema)
    if r is not None: print "http_post_host_id: Warning: remove extra items ", r
    change_keys_http2db(http_content['host'], http2db_host)

    if 'host' in http_content:
        host = http_content['host']
        if 'host-data' in http_content:
            host.update(http_content['host-data'])
    else:
        host = http_content['host-data']
    warning_text = ""
    ip_name = host['ip_name']
    user = host['user']
    password = host.get('password')
    if host.get('autodiscover'):
        if not RADclass_module:
            try:
                RADclass_module = imp.find_module("RADclass")
            except (IOError, ImportError) as e:
                raise ImportError("Cannot import RADclass.py Openvim not properly installed" +str(e))

        #fill rad info
        rad = RADclass_module.RADclass()
        (return_status, code) = rad.obtain_RAD(user, password, ip_name)
        
        #return 
        if not return_status:
            print 'http_post_hosts ERROR obtaining RAD', code
            bottle.abort(HTTP_Bad_Request, code)
            return
        warning_text=code
        rad_structure = yaml.load(rad.to_text())
        print 'rad_structure\n---------------------'
        print json.dumps(rad_structure, indent=4)
        print '---------------------'
        #return
        WHERE_={"family":rad_structure['processor']['family'], 'manufacturer':rad_structure['processor']['manufacturer'], 'version':rad_structure['processor']['version']} 
        result, content = my.db.get_table(FROM='host_ranking', 
                    SELECT=('ranking',),
                    WHERE=WHERE_)
        if result > 0:
            host['ranking'] = content[0]['ranking']
        else:
            #error_text= "Host " + str(WHERE_)+ " not found in ranking table. Not valid for VIM management"
            #bottle.abort(HTTP_Bad_Request, error_text)
            #return
            warning_text += "Host " + str(WHERE_)+ " not found in ranking table. Assuming lowest value 100\n"
            host['ranking'] = 100 #TODO: as not used in this version, set the lowest value
    
        features = rad_structure['processor'].get('features', ())
        host['features'] = ",".join(features)
        host['numas'] = [] 
        
        for node in (rad_structure['resource topology']['nodes'] or {}).itervalues():
            interfaces= []
            cores = []
            eligible_cores=[]
            count = 0
            for core in node['cpu']['eligible_cores']:
                eligible_cores.extend(core)
            for core in node['cpu']['cores']:
                for thread_id in core:
                    c={'core_id': count, 'thread_id': thread_id}
                    if thread_id not in eligible_cores: c['status'] = 'noteligible'
                    cores.append(c)
                count = count+1 

            if 'nics' in node:    
                for port_k, port_v in node['nics']['nic 0']['ports'].iteritems():
                    if port_v['virtual']:
                        continue
                    else:
                        sriovs = []
                        for port_k2, port_v2 in node['nics']['nic 0']['ports'].iteritems():
                            if port_v2['virtual'] and port_v2['PF_pci_id']==port_k:
                                sriovs.append({'pci':port_k2, 'mac':port_v2['mac'], 'source_name':port_v2['source_name']})
                        if len(sriovs)>0:
                            #sort sriov according to pci and rename them to the vf number
                            new_sriovs = sorted(sriovs, key=lambda k: k['pci'])
                            index=0 
                            for sriov in new_sriovs:
                                sriov['source_name'] = index
                                index += 1
                            interfaces.append  ({'pci':str(port_k), 'Mbps': port_v['speed']/1000000, 'sriovs': new_sriovs, 'mac':port_v['mac'], 'source_name':port_v['source_name']})
            memory=node['memory']['node_size'] / (1024*1024*1024)
            #memory=get_next_2pow(node['memory']['hugepage_nr'])
            host['numas'].append( {'numa_socket': node['id'], 'hugepages': node['memory']['hugepage_nr'], 'memory':memory, 'interfaces': interfaces, 'cores': cores } )
    # print json.dumps(host, indent=4)
    # insert in data base
    if "created_at" in host:
        del host["created_at"]
    for numa in host.get("numas", ()):
        if "hugepages_consumed" in numa:
            del numa["hugepages_consumed"]
    result, content = my.db.new_host(host)
    if result >= 0:
        if content['admin_state_up']:
            #create thread
            host_test_mode = True if config_dic['mode']=='test' or config_dic['mode']=="OF only" else False
            host_develop_mode = True if config_dic['mode']=='development' else False
            host_develop_bridge_iface = config_dic.get('development_bridge', None)
            thread = ht.host_thread(name=host.get('name',ip_name), user=user, host=ip_name,
                                    password=host.get('password'),
                                    keyfile=host.get('keyfile', config_dic["host_ssh_keyfile"]),
                                    db=config_dic['db'], db_lock=config_dic['db_lock'],
                                    test=host_test_mode, image_path=config_dic['host_image_path'],
                                    version=config_dic['version'], host_id=content['uuid'],
                                    develop_mode=host_develop_mode, develop_bridge_iface=host_develop_bridge_iface)

            thread.start()
            config_dic['host_threads'][content['uuid']] = thread

            if config_dic['network_type'] == 'ovs':
                # create bridge
                create_dhcp_ovs_bridge()
                config_dic['host_threads'][content['uuid']].insert_task("new-ovsbridge")
                # create vlxan bwt OVS controller and computes
                create_vxlan_mesh(content['uuid'])

        # return host data
        change_keys_http2db(content, http2db_host, reverse=True)
        if len(warning_text)>0:
            content["warning"]= warning_text
        data={'host' : content}
        return format_out(data)
    else:
        bottle.abort(HTTP_Bad_Request, content)
        return


def delete_dhcp_ovs_bridge(vlan, net_uuid):
    """
    Delete bridges and port created during dhcp launching at openvim controller
    :param vlan: net vlan id
    :param net_uuid: network identifier
    :return:
    """
    dhcp_path = config_dic['ovs_controller_file_path']

    http_controller = config_dic['http_threads'][threading.current_thread().name]
    dhcp_controller = http_controller.ovim.get_dhcp_controller()

    dhcp_controller.delete_dhcp_server(vlan, net_uuid, dhcp_path)
    dhcp_controller.delete_dhcp_port(vlan, net_uuid)


def create_dhcp_ovs_bridge():
    """
    Initialize bridge to allocate the dhcp server at openvim controller
    :return:
    """
    http_controller = config_dic['http_threads'][threading.current_thread().name]
    dhcp_controller = http_controller.ovim.get_dhcp_controller()

    dhcp_controller.create_ovs_bridge()


def set_mac_dhcp(vm_ip, vlan, first_ip, last_ip, cidr, mac):
    """"
    Launch a dhcpserver base on dnsmasq attached to the net base on vlan id across the the openvim computes
    :param vm_ip: IP address asigned to a VM
    :param vlan: Segmentation id
    :param first_ip: First dhcp range ip
    :param last_ip: Last dhcp range ip
    :param cidr: net cidr
    :param mac: VM vnic mac to be macthed with the IP received
    """
    if not vm_ip:
        return
    ip_tools = IPNetwork(cidr)
    cidr_len = ip_tools.prefixlen
    dhcp_netmask = str(ip_tools.netmask)
    dhcp_path = config_dic['ovs_controller_file_path']

    new_cidr = [first_ip + '/' + str(cidr_len)]
    if not len(all_matching_cidrs(vm_ip, new_cidr)):
        vm_ip = None

    http_controller = config_dic['http_threads'][threading.current_thread().name]
    dhcp_controller = http_controller.ovim.get_dhcp_controller()

    dhcp_controller.set_mac_dhcp_server(vm_ip, mac, vlan, dhcp_netmask, first_ip, dhcp_path)


def delete_mac_dhcp(vm_ip, vlan, mac):
    """
    Delete into dhcp conf file the ip  assigned to a specific MAC address
    :param vm_ip: IP address asigned to a VM
    :param vlan: Segmentation id
    :param mac:  VM vnic mac to be macthed with the IP received
    :return:
    """

    dhcp_path = config_dic['ovs_controller_file_path']

    http_controller = config_dic['http_threads'][threading.current_thread().name]
    dhcp_controller = http_controller.ovim.get_dhcp_controller()

    dhcp_controller.delete_mac_dhcp_server(vm_ip, mac, vlan, dhcp_path)


def create_vxlan_mesh(host_id):
    """
    Create vxlan mesh across all openvimc controller and computes.
    :param host_id: host identifier
    :param host_id: host identifier
    :return:
    """
    dhcp_compute_name = get_vxlan_interface("dhcp")
    existing_hosts = get_hosts()
    if len(existing_hosts['hosts']) > 0:
        # vlxan mesh creation between openvim controller and computes
        computes_available = existing_hosts['hosts']

        http_controller = config_dic['http_threads'][threading.current_thread().name]
        dhcp_controller = http_controller.ovim.get_dhcp_controller()

        for compute in computes_available:
            vxlan_interface_name = get_vxlan_interface(compute['id'][:8])
            config_dic['host_threads'][compute['id']].insert_task("new-vxlan", dhcp_compute_name, dhcp_controller.host)
            dhcp_controller.create_ovs_vxlan_tunnel(vxlan_interface_name, compute['ip_name'])

        # vlxan mesh creation between openvim computes
        for count, compute_owner in enumerate(computes_available):
            for compute in computes_available:
                if compute_owner['id'] == compute['id']:
                    pass
                else:
                    vxlan_interface_name = get_vxlan_interface(compute_owner['id'][:8])
                    dhcp_controller.create_ovs_vxlan_tunnel(vxlan_interface_name, compute_owner['ip_name'])
                    config_dic['host_threads'][compute['id']].insert_task("new-vxlan",
                                                                          vxlan_interface_name,
                                                                          compute_owner['ip_name'])


def delete_vxlan_mesh(host_id):
    """
    Create a task for remove a specific compute of the vlxan mesh
    :param host_id: host id to be deleted.
    """
    existing_hosts = get_hosts()
    computes_available = existing_hosts['hosts']
    #
    vxlan_interface_name = get_vxlan_interface(host_id[:8])

    http_controller = config_dic['http_threads'][threading.current_thread().name]
    dhcp_host = http_controller.ovim.get_dhcp_controller()

    dhcp_host.delete_ovs_vxlan_tunnel(vxlan_interface_name)
    # remove bridge from openvim controller if no more computes exist
    if len(existing_hosts):
        dhcp_host.delete_ovs_bridge()
    # Remove vxlan mesh
    for compute in computes_available:
        if host_id == compute['id']:
            pass
        else:
            dhcp_host.delete_ovs_vxlan_tunnel(vxlan_interface_name)
            config_dic['host_threads'][compute['id']].insert_task("del-vxlan", vxlan_interface_name)


def get_vxlan_interface(local_uuid):
    """
    Genearte a vxlan interface name
    :param local_uuid: host id
    :return: vlxan-8digits
    """
    return 'vxlan-' + local_uuid[:8]


@bottle.route(url_base + '/hosts/<host_id>', method='PUT')
def http_put_host_id(host_id):
    '''modify a host into the database. All resources are got and inserted'''
    my = config_dic['http_threads'][ threading.current_thread().name ]
    #check permissions
    if not my.admin:
        bottle.abort(HTTP_Unauthorized, "Needed admin privileges")
    
    #parse input data
    http_content = format_in( host_edit_schema )
    r = remove_extra_items(http_content, host_edit_schema)
    if r is not None: print "http_post_host_id: Warning: remove extra items ", r
    change_keys_http2db(http_content['host'], http2db_host)

    #insert in data base
    result, content = my.db.edit_host(host_id, http_content['host'])
    if result >= 0:
        convert_boolean(content, ('admin_state_up',) )
        change_keys_http2db(content, http2db_host, reverse=True)
        data={'host' : content}

        if config_dic['network_type'] == 'ovs':
            delete_vxlan_mesh(host_id)
            config_dic['host_threads'][host_id].insert_task("del-ovsbridge")

        #reload thread
        config_dic['host_threads'][host_id].name = content.get('name',content['ip_name'])
        config_dic['host_threads'][host_id].user = content['user']
        config_dic['host_threads'][host_id].host = content['ip_name']
        config_dic['host_threads'][host_id].insert_task("reload")

        if config_dic['network_type'] == 'ovs':
            # create mesh with new host data
            config_dic['host_threads'][host_id].insert_task("new-ovsbridge")
            create_vxlan_mesh(host_id)

        #print data
        return format_out(data)
    else:
        bottle.abort(HTTP_Bad_Request, content)
        return



@bottle.route(url_base + '/hosts/<host_id>', method='DELETE')
def http_delete_host_id(host_id):
    my = config_dic['http_threads'][ threading.current_thread().name ]
    #check permissions
    if not my.admin:
        bottle.abort(HTTP_Unauthorized, "Needed admin privileges")
    result, content = my.db.delete_row('hosts', host_id)
    if result == 0:
        bottle.abort(HTTP_Not_Found, content)
    elif result > 0:
        if config_dic['network_type'] == 'ovs':
            delete_vxlan_mesh(host_id)
        # terminate thread
        if host_id in config_dic['host_threads']:
            if config_dic['network_type'] == 'ovs':
                config_dic['host_threads'][host_id].insert_task("del-ovsbridge")
            config_dic['host_threads'][host_id].insert_task("exit")
        #return data
        data={'result' : content}
        return format_out(data)
    else:
        print "http_delete_host_id error",result, content
        bottle.abort(-result, content)
        return
#
# TENANTS
#


@bottle.route(url_base + '/tenants', method='GET')
def http_get_tenants():
    """
    Retreive tenant list from DB
    :return:
    """
    my = config_dic['http_threads'][threading.current_thread().name]

    try:
        select_, where_, limit_ = filter_query_string(bottle.request.query, http2db_tenant,
                                                      ('id', 'name', 'description', 'enabled'))
        tenants = my.ovim.get_tenants(select_, where_)
        delete_nulls(tenants)
        change_keys_http2db(tenants, http2db_tenant, reverse=True)
        data = {'tenants': tenants}
        return format_out(data)
    except ovim.ovimException as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(e.http_code, str(e))
    except Exception as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(HTTP_Bad_Request, str(e))


@bottle.route(url_base + '/tenants/<tenant_id>', method='GET')
def http_get_tenant_id(tenant_id):
    """
    Get tenant from DB by id
    :param tenant_id: tenant id
    :return:
    """
    my = config_dic['http_threads'][threading.current_thread().name]

    try:
        tenant = my.ovim.show_tenant_id(tenant_id)
        delete_nulls(tenant)
        change_keys_http2db(tenant, http2db_tenant, reverse=True)
        data = {'tenant': tenant}
        return format_out(data)
    except ovim.ovimException as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(e.http_code, str(e))
    except Exception as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(HTTP_Bad_Request, str(e))


@bottle.route(url_base + '/tenants', method='POST')
def http_post_tenants():
    """
    Insert a tenant into the database.
    :return:
    """
    my = config_dic['http_threads'][threading.current_thread().name]

    try:
        http_content = format_in(tenant_new_schema)
        r = remove_extra_items(http_content, tenant_new_schema)
        if r is not None:
            my.logger.error("http_post_tenants: Warning: remove extra items " + str(r), exc_info=True)
        # insert in data base
        tenant_id = my.ovim.new_tentant(http_content['tenant'])
        tenant = my.ovim.show_tenant_id(tenant_id)
        change_keys_http2db(tenant, http2db_tenant, reverse=True)
        delete_nulls(tenant)
        data = {'tenant': tenant}
        return format_out(data)
    except ovim.ovimException as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(e.http_code, str(e))
    except Exception as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(HTTP_Bad_Request, str(e))

    
@bottle.route(url_base + '/tenants/<tenant_id>', method='PUT')
def http_put_tenant_id(tenant_id):
    """
    Update a tenantinto DB.
    :param tenant_id: tentant id
    :return:
    """

    my = config_dic['http_threads'][threading.current_thread().name]
    try:
        # parse input data
        http_content = format_in(tenant_edit_schema)
        r = remove_extra_items(http_content, tenant_edit_schema)
        if r is not None:
            print "http_put_tenant_id: Warning: remove extra items ", r
        change_keys_http2db(http_content['tenant'], http2db_tenant)
        # insert in data base
        my.ovim.edit_tenant(tenant_id, http_content['tenant'])
        tenant = my.ovim.show_tenant_id(tenant_id)
        change_keys_http2db(tenant, http2db_tenant, reverse=True)
        data = {'tenant': tenant}
        return format_out(data)
    except ovim.ovimException as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(e.http_code, str(e))
    except Exception as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(HTTP_Bad_Request, str(e))


@bottle.route(url_base + '/tenants/<tenant_id>', method='DELETE')
def http_delete_tenant_id(tenant_id):
    """
    Delete a tenant from the database.
    :param tenant_id: tenant id
    :return:
    """
    my = config_dic['http_threads'][threading.current_thread().name]

    try:
        content = my.ovim.delete_tentant(tenant_id)
        data = {'result': content}
        return format_out(data)
    except ovim.ovimException as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(e.http_code, str(e))
    except Exception as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(HTTP_Bad_Request, str(e))
#
# FLAVORS
#


@bottle.route(url_base + '/<tenant_id>/flavors', method='GET')
def http_get_flavors(tenant_id):
    my = config_dic['http_threads'][ threading.current_thread().name ]
    #check valid tenant_id
    result,content = check_valid_tenant(my, tenant_id)
    if result != 0:
        bottle.abort(result, content)
    #obtain data
    select_,where_,limit_ = filter_query_string(bottle.request.query, http2db_flavor,
            ('id','name','description','public') )
    if tenant_id=='any':
        from_  ='flavors'
    else:
        from_  ='tenants_flavors inner join flavors on tenants_flavors.flavor_id=flavors.uuid'
        where_['tenant_id'] = tenant_id
    result, content = my.db.get_table(FROM=from_, SELECT=select_, WHERE=where_, LIMIT=limit_)
    if result < 0:
        print "http_get_flavors Error", content
        bottle.abort(-result, content)
    else:
        change_keys_http2db(content, http2db_flavor, reverse=True)
        for row in content:
            row['links']=[ {'href': "/".join( (my.url_preffix, tenant_id, 'flavors', str(row['id']) ) ), 'rel':'bookmark' } ]
        data={'flavors' : content}
        return format_out(data)

@bottle.route(url_base + '/<tenant_id>/flavors/<flavor_id>', method='GET')
def http_get_flavor_id(tenant_id, flavor_id):
    my = config_dic['http_threads'][ threading.current_thread().name ]
    #check valid tenant_id
    result,content = check_valid_tenant(my, tenant_id)
    if result != 0:
        bottle.abort(result, content)
    #obtain data
    select_,where_,limit_ = filter_query_string(bottle.request.query, http2db_flavor,
            ('id','name','description','ram', 'vcpus', 'extended', 'disk', 'public') )
    if tenant_id=='any':
        from_  ='flavors'
    else:
        from_  ='tenants_flavors as tf inner join flavors as f on tf.flavor_id=f.uuid'
        where_['tenant_id'] = tenant_id
    where_['uuid'] = flavor_id
    result, content = my.db.get_table(SELECT=select_, FROM=from_, WHERE=where_, LIMIT=limit_)

    if result < 0:
        print "http_get_flavor_id error %d %s" % (result, content)
        bottle.abort(-result, content)
    elif result==0:
        print "http_get_flavors_id flavor '%s' not found" % str(flavor_id)
        bottle.abort(HTTP_Not_Found, 'flavor %s not found' % flavor_id)
    else:
        change_keys_http2db(content, http2db_flavor, reverse=True)
        if 'extended' in content[0] and content[0]['extended'] is not None:
            extended = json.loads(content[0]['extended'])
            if 'devices' in extended: 
                change_keys_http2db(extended['devices'], http2db_flavor, reverse=True)
            content[0]['extended']=extended
        convert_bandwidth(content[0], reverse=True)
        content[0]['links']=[ {'href': "/".join( (my.url_preffix, tenant_id, 'flavors', str(content[0]['id']) ) ), 'rel':'bookmark' } ]
        data={'flavor' : content[0]}
        #data['tenants_links'] = dict([('tenant', row['id']) for row in content])
        return format_out(data)


@bottle.route(url_base + '/<tenant_id>/flavors', method='POST')
def http_post_flavors(tenant_id):
    '''insert a flavor into the database, and attach to tenant.'''
    my = config_dic['http_threads'][ threading.current_thread().name ]
    #check valid tenant_id
    result,content = check_valid_tenant(my, tenant_id)
    if result != 0:
        bottle.abort(result, content)
    http_content = format_in( flavor_new_schema )
    r = remove_extra_items(http_content, flavor_new_schema)
    if r is not None: print "http_post_flavors: Warning: remove extra items ", r
    change_keys_http2db(http_content['flavor'], http2db_flavor)
    extended_dict = http_content['flavor'].pop('extended', None)
    if extended_dict is not None: 
        result, content = check_extended(extended_dict)
        if result<0:
            print "http_post_flavors wrong input extended error %d %s" % (result, content)
            bottle.abort(-result, content)
            return
        convert_bandwidth(extended_dict)
        if 'devices' in extended_dict: change_keys_http2db(extended_dict['devices'], http2db_flavor)
        http_content['flavor']['extended'] = json.dumps(extended_dict)
    #insert in data base
    result, content = my.db.new_flavor(http_content['flavor'], tenant_id)
    if result >= 0:
        return http_get_flavor_id(tenant_id, content)
    else:
        print "http_psot_flavors error %d %s" % (result, content)
        bottle.abort(-result, content)
        return
    
@bottle.route(url_base + '/<tenant_id>/flavors/<flavor_id>', method='DELETE')
def http_delete_flavor_id(tenant_id, flavor_id):
    '''Deletes the flavor_id of a tenant. IT removes from tenants_flavors table.'''
    my = config_dic['http_threads'][ threading.current_thread().name ]
    #check valid tenant_id
    result,content = check_valid_tenant(my, tenant_id)
    if result != 0:
        bottle.abort(result, content)
        return
    result, content = my.db.delete_image_flavor('flavor', flavor_id, tenant_id)
    if result == 0:
        bottle.abort(HTTP_Not_Found, content)
    elif result >0:
        data={'result' : content}
        return format_out(data)
    else:
        print "http_delete_flavor_id error",result, content
        bottle.abort(-result, content)
        return

@bottle.route(url_base + '/<tenant_id>/flavors/<flavor_id>/<action>', method='POST')
def http_attach_detach_flavors(tenant_id, flavor_id, action):
    '''attach/detach an existing flavor in this tenant. That is insert/remove at tenants_flavors table.'''
    #TODO alf:  not tested at all!!!
    my = config_dic['http_threads'][ threading.current_thread().name ]
    #check valid tenant_id
    result,content = check_valid_tenant(my, tenant_id)
    if result != 0:
        bottle.abort(result, content)
    if tenant_id=='any':
        bottle.abort(HTTP_Bad_Request, "Invalid tenant 'any' with this command")
    #check valid action
    if action!='attach' and action != 'detach':
        bottle.abort(HTTP_Method_Not_Allowed, "actions can be attach or detach")
        return

    #Ensure that flavor exist 
    from_  ='tenants_flavors as tf right join flavors as f on tf.flavor_id=f.uuid'
    where_={'uuid': flavor_id}
    result, content = my.db.get_table(SELECT=('public','tenant_id'), FROM=from_, WHERE=where_)
    if result==0:
        if action=='attach':
            text_error="Flavor '%s' not found" % flavor_id
        else:
            text_error="Flavor '%s' not found for tenant '%s'" % (flavor_id, tenant_id)
        bottle.abort(HTTP_Not_Found, text_error)
        return
    elif result>0:
        flavor=content[0]
        if action=='attach':
            if flavor['tenant_id']!=None:
                bottle.abort(HTTP_Conflict, "Flavor '%s' already attached to tenant '%s'" % (flavor_id, tenant_id))
            if flavor['public']=='no' and not my.admin:
                #allow only attaching public flavors
                bottle.abort(HTTP_Unauthorized, "Needed admin rights to attach a private flavor")
                return
            #insert in data base
            result, content = my.db.new_row('tenants_flavors', {'flavor_id':flavor_id, 'tenant_id': tenant_id})
            if result >= 0:
                return http_get_flavor_id(tenant_id, flavor_id)
        else: #detach
            if flavor['tenant_id']==None:
                bottle.abort(HTTP_Not_Found, "Flavor '%s' not attached to tenant '%s'" % (flavor_id, tenant_id))
            result, content = my.db.delete_row_by_dict(FROM='tenants_flavors', WHERE={'flavor_id':flavor_id, 'tenant_id':tenant_id})
            if result>=0:
                if flavor['public']=='no':
                    #try to delete the flavor completely to avoid orphan flavors, IGNORE error
                    my.db.delete_row_by_dict(FROM='flavors', WHERE={'uuid':flavor_id})
                data={'result' : "flavor detached"}
                return format_out(data)
    
    #if get here is because an error
    print "http_attach_detach_flavors error %d %s" % (result, content)
    bottle.abort(-result, content)
    return

@bottle.route(url_base + '/<tenant_id>/flavors/<flavor_id>', method='PUT')
def http_put_flavor_id(tenant_id, flavor_id):
    '''update a flavor_id into the database.'''
    my = config_dic['http_threads'][ threading.current_thread().name ]
    #check valid tenant_id
    result,content = check_valid_tenant(my, tenant_id)
    if result != 0:
        bottle.abort(result, content)
    #parse input data
    http_content = format_in( flavor_update_schema )
    r = remove_extra_items(http_content, flavor_update_schema)
    if r is not None: print "http_put_flavor_id: Warning: remove extra items ", r
    change_keys_http2db(http_content['flavor'], http2db_flavor)
    extended_dict = http_content['flavor'].pop('extended', None)
    if extended_dict is not None: 
        result, content = check_extended(extended_dict)
        if result<0:
            print "http_put_flavor_id wrong input extended error %d %s" % (result, content)
            bottle.abort(-result, content)
            return
        convert_bandwidth(extended_dict)
        if 'devices' in extended_dict: change_keys_http2db(extended_dict['devices'], http2db_flavor)
        http_content['flavor']['extended'] = json.dumps(extended_dict)
    #Ensure that flavor exist 
    where_={'uuid': flavor_id}
    if tenant_id=='any':
        from_  ='flavors'
    else:
        from_  ='tenants_flavors as ti inner join flavors as i on ti.flavor_id=i.uuid'
        where_['tenant_id'] = tenant_id
    result, content = my.db.get_table(SELECT=('public',), FROM=from_, WHERE=where_)
    if result==0:
        text_error="Flavor '%s' not found" % flavor_id
        if tenant_id!='any':
            text_error +=" for tenant '%s'" % flavor_id
        bottle.abort(HTTP_Not_Found, text_error)
        return
    elif result>0:
        if content[0]['public']=='yes' and not my.admin:
            #allow only modifications over private flavors
            bottle.abort(HTTP_Unauthorized, "Needed admin rights to edit a public flavor")
            return
        #insert in data base
        result, content = my.db.update_rows('flavors', http_content['flavor'], {'uuid': flavor_id})

    if result < 0:
        print "http_put_flavor_id error %d %s" % (result, content)
        bottle.abort(-result, content)
        return
    else:
        return http_get_flavor_id(tenant_id, flavor_id)



#
# IMAGES
#

@bottle.route(url_base + '/<tenant_id>/images', method='GET')
def http_get_images(tenant_id):
    my = config_dic['http_threads'][ threading.current_thread().name ]
    #check valid tenant_id
    result,content = check_valid_tenant(my, tenant_id)
    if result != 0:
        bottle.abort(result, content)
    #obtain data
    select_,where_,limit_ = filter_query_string(bottle.request.query, http2db_image,
            ('id','name','checksum','description','path','public') )
    if tenant_id=='any':
        from_  ='images'
        where_or_ = None
    else:
        from_  ='tenants_images right join images on tenants_images.image_id=images.uuid'
        where_or_ = {'tenant_id': tenant_id, 'public': 'yes'}
    result, content = my.db.get_table(SELECT=select_, DISTINCT=True, FROM=from_, WHERE=where_, WHERE_OR=where_or_, WHERE_AND_OR="AND", LIMIT=limit_)
    if result < 0:
        print "http_get_images Error", content
        bottle.abort(-result, content)
    else:
        change_keys_http2db(content, http2db_image, reverse=True)
        #for row in content: row['links']=[ {'href': "/".join( (my.url_preffix, tenant_id, 'images', str(row['id']) ) ), 'rel':'bookmark' } ]
        data={'images' : content}
        return format_out(data)

@bottle.route(url_base + '/<tenant_id>/images/<image_id>', method='GET')
def http_get_image_id(tenant_id, image_id):
    my = config_dic['http_threads'][ threading.current_thread().name ]
    #check valid tenant_id
    result,content = check_valid_tenant(my, tenant_id)
    if result != 0:
        bottle.abort(result, content)
    #obtain data
    select_,where_,limit_ = filter_query_string(bottle.request.query, http2db_image,
            ('id','name','checksum','description','progress', 'status','path', 'created', 'updated','public') )
    if tenant_id=='any':
        from_  ='images'
        where_or_ = None
    else:
        from_  ='tenants_images as ti right join images as i on ti.image_id=i.uuid'
        where_or_ = {'tenant_id': tenant_id, 'public': "yes"}
    where_['uuid'] = image_id
    result, content = my.db.get_table(SELECT=select_, DISTINCT=True, FROM=from_, WHERE=where_, WHERE_OR=where_or_, WHERE_AND_OR="AND", LIMIT=limit_)

    if result < 0:
        print "http_get_images error %d %s" % (result, content)
        bottle.abort(-result, content)
    elif result==0:
        print "http_get_images image '%s' not found" % str(image_id)
        bottle.abort(HTTP_Not_Found, 'image %s not found' % image_id)
    else:
        convert_datetime2str(content)
        change_keys_http2db(content, http2db_image, reverse=True)
        if 'metadata' in content[0] and content[0]['metadata'] is not None:
            metadata = json.loads(content[0]['metadata'])
            content[0]['metadata']=metadata
        content[0]['links']=[ {'href': "/".join( (my.url_preffix, tenant_id, 'images', str(content[0]['id']) ) ), 'rel':'bookmark' } ]
        data={'image' : content[0]}
        #data['tenants_links'] = dict([('tenant', row['id']) for row in content])
        return format_out(data)

@bottle.route(url_base + '/<tenant_id>/images', method='POST')
def http_post_images(tenant_id):
    '''insert a image into the database, and attach to tenant.'''
    my = config_dic['http_threads'][ threading.current_thread().name ]
    #check valid tenant_id
    result,content = check_valid_tenant(my, tenant_id)
    if result != 0:
        bottle.abort(result, content)
    http_content = format_in(image_new_schema)
    r = remove_extra_items(http_content, image_new_schema)
    if r is not None: print "http_post_images: Warning: remove extra items ", r
    change_keys_http2db(http_content['image'], http2db_image)
    metadata_dict = http_content['image'].pop('metadata', None)
    if metadata_dict is not None: 
        http_content['image']['metadata'] = json.dumps(metadata_dict)
    #calculate checksum
    try:
        image_file = http_content['image'].get('path',None)
        parsed_url = urlparse.urlparse(image_file)
        if parsed_url.scheme == "" and parsed_url.netloc == "":
            # The path is a local file
            if os.path.exists(image_file):
                http_content['image']['checksum'] = md5(image_file)
        else:
            # The path is a URL. Code should be added to download the image and calculate the checksum
            #http_content['image']['checksum'] = md5(downloaded_image)
            pass
        # Finally, only if we are in test mode and checksum has not been calculated, we calculate it from the path
        host_test_mode = True if config_dic['mode']=='test' or config_dic['mode']=="OF only" else False
        if host_test_mode:
            if 'checksum' not in http_content['image']:
                http_content['image']['checksum'] = md5_string(image_file)
        else:
            # At this point, if the path is a local file and no chechsum has been obtained yet, an error is sent back.
            # If it is a URL, no error is sent. Checksum will be an empty string
            if parsed_url.scheme == "" and parsed_url.netloc == "" and 'checksum' not in http_content['image']:
                content = "Image file not found"
                print "http_post_images error: %d %s" % (HTTP_Bad_Request, content)
                bottle.abort(HTTP_Bad_Request, content)
    except Exception as e:
        print "ERROR. Unexpected exception: %s" % (str(e))
        bottle.abort(HTTP_Internal_Server_Error, type(e).__name__ + ": " + str(e))
    #insert in data base
    result, content = my.db.new_image(http_content['image'], tenant_id)
    if result >= 0:
        return http_get_image_id(tenant_id, content)
    else:
        print "http_post_images error %d %s" % (result, content)
        bottle.abort(-result, content)
        return
    
@bottle.route(url_base + '/<tenant_id>/images/<image_id>', method='DELETE')
def http_delete_image_id(tenant_id, image_id):
    '''Deletes the image_id of a tenant. IT removes from tenants_images table.'''
    my = config_dic['http_threads'][ threading.current_thread().name ]
    #check valid tenant_id
    result,content = check_valid_tenant(my, tenant_id)
    if result != 0:
        bottle.abort(result, content)
    result, content = my.db.delete_image_flavor('image', image_id, tenant_id)
    if result == 0:
        bottle.abort(HTTP_Not_Found, content)
    elif result >0:
        data={'result' : content}
        return format_out(data)
    else:
        print "http_delete_image_id error",result, content
        bottle.abort(-result, content)
        return

@bottle.route(url_base + '/<tenant_id>/images/<image_id>/<action>', method='POST')
def http_attach_detach_images(tenant_id, image_id, action):
    '''attach/detach an existing image in this tenant. That is insert/remove at tenants_images table.'''
    #TODO alf:  not tested at all!!!
    my = config_dic['http_threads'][ threading.current_thread().name ]
    #check valid tenant_id
    result,content = check_valid_tenant(my, tenant_id)
    if result != 0:
        bottle.abort(result, content)
    if tenant_id=='any':
        bottle.abort(HTTP_Bad_Request, "Invalid tenant 'any' with this command")
    #check valid action
    if action!='attach' and action != 'detach':
        bottle.abort(HTTP_Method_Not_Allowed, "actions can be attach or detach")
        return

    #Ensure that image exist 
    from_  ='tenants_images as ti right join images as i on ti.image_id=i.uuid'
    where_={'uuid': image_id}
    result, content = my.db.get_table(SELECT=('public','tenant_id'), FROM=from_, WHERE=where_)
    if result==0:
        if action=='attach':
            text_error="Image '%s' not found" % image_id
        else:
            text_error="Image '%s' not found for tenant '%s'" % (image_id, tenant_id)
        bottle.abort(HTTP_Not_Found, text_error)
        return
    elif result>0:
        image=content[0]
        if action=='attach':
            if image['tenant_id']!=None:
                bottle.abort(HTTP_Conflict, "Image '%s' already attached to tenant '%s'" % (image_id, tenant_id))
            if image['public']=='no' and not my.admin:
                #allow only attaching public images
                bottle.abort(HTTP_Unauthorized, "Needed admin rights to attach a private image")
                return
            #insert in data base
            result, content = my.db.new_row('tenants_images', {'image_id':image_id, 'tenant_id': tenant_id})
            if result >= 0:
                return http_get_image_id(tenant_id, image_id)
        else: #detach
            if image['tenant_id']==None:
                bottle.abort(HTTP_Not_Found, "Image '%s' not attached to tenant '%s'" % (image_id, tenant_id))
            result, content = my.db.delete_row_by_dict(FROM='tenants_images', WHERE={'image_id':image_id, 'tenant_id':tenant_id})
            if result>=0:
                if image['public']=='no':
                    #try to delete the image completely to avoid orphan images, IGNORE error
                    my.db.delete_row_by_dict(FROM='images', WHERE={'uuid':image_id})
                data={'result' : "image detached"}
                return format_out(data)
    
    #if get here is because an error
    print "http_attach_detach_images error %d %s" % (result, content)
    bottle.abort(-result, content)
    return

@bottle.route(url_base + '/<tenant_id>/images/<image_id>', method='PUT')
def http_put_image_id(tenant_id, image_id):
    '''update a image_id into the database.'''
    my = config_dic['http_threads'][ threading.current_thread().name ]
    #check valid tenant_id
    result,content = check_valid_tenant(my, tenant_id)
    if result != 0:
        bottle.abort(result, content)
    #parse input data
    http_content = format_in( image_update_schema )
    r = remove_extra_items(http_content, image_update_schema)
    if r is not None: print "http_put_image_id: Warning: remove extra items ", r
    change_keys_http2db(http_content['image'], http2db_image)
    metadata_dict = http_content['image'].pop('metadata', None)
    if metadata_dict is not None: 
        http_content['image']['metadata'] = json.dumps(metadata_dict)
    #Ensure that image exist 
    where_={'uuid': image_id}
    if tenant_id=='any':
        from_  ='images'
        where_or_ = None
    else:
        from_  ='tenants_images as ti right join images as i on ti.image_id=i.uuid'
        where_or_ = {'tenant_id': tenant_id, 'public': 'yes'}
    result, content = my.db.get_table(SELECT=('public',), DISTINCT=True, FROM=from_, WHERE=where_, WHERE_OR=where_or_, WHERE_AND_OR="AND")
    if result==0:
        text_error="Image '%s' not found" % image_id
        if tenant_id!='any':
            text_error +=" for tenant '%s'" % image_id
        bottle.abort(HTTP_Not_Found, text_error)
        return
    elif result>0:
        if content[0]['public']=='yes' and not my.admin:
            #allow only modifications over private images
            bottle.abort(HTTP_Unauthorized, "Needed admin rights to edit a public image")
            return
        #insert in data base
        result, content = my.db.update_rows('images', http_content['image'], {'uuid': image_id})

    if result < 0:
        print "http_put_image_id error %d %s" % (result, content)
        bottle.abort(-result, content)
        return
    else:
        return http_get_image_id(tenant_id, image_id)


#
# SERVERS
#

@bottle.route(url_base + '/<tenant_id>/servers', method='GET')
def http_get_servers(tenant_id):
    my = config_dic['http_threads'][ threading.current_thread().name ]
    result,content = check_valid_tenant(my, tenant_id)
    if result != 0:
        bottle.abort(result, content)
        return
    #obtain data
    select_,where_,limit_ = filter_query_string(bottle.request.query, http2db_server,
            ('id','name','description','hostId','imageRef','flavorRef','status', 'tenant_id') )
    if tenant_id!='any':
        where_['tenant_id'] = tenant_id
    result, content = my.db.get_table(SELECT=select_, FROM='instances', WHERE=where_, LIMIT=limit_)
    if result < 0:
        print "http_get_servers Error", content
        bottle.abort(-result, content)
    else:
        change_keys_http2db(content, http2db_server, reverse=True)
        for row in content:
            tenant_id = row.pop('tenant_id')
            row['links']=[ {'href': "/".join( (my.url_preffix, tenant_id, 'servers', str(row['id']) ) ), 'rel':'bookmark' } ]
        data={'servers' : content}
        return format_out(data)

@bottle.route(url_base + '/<tenant_id>/servers/<server_id>', method='GET')
def http_get_server_id(tenant_id, server_id):
    my = config_dic['http_threads'][ threading.current_thread().name ]
    #check valid tenant_id
    result,content = check_valid_tenant(my, tenant_id)
    if result != 0:
        bottle.abort(result, content)
        return
    #obtain data
    result, content = my.db.get_instance(server_id)
    if result == 0:
        bottle.abort(HTTP_Not_Found, content)
    elif result >0:
        #change image/flavor-id to id and link
        convert_bandwidth(content, reverse=True)
        convert_datetime2str(content)
        if content["ram"]==0 : del content["ram"]
        if content["vcpus"]==0 : del content["vcpus"]
        if 'flavor_id' in content:
            if content['flavor_id'] is not None:
                content['flavor'] = {'id':content['flavor_id'], 
                                     'links':[{'href':  "/".join( (my.url_preffix, content['tenant_id'], 'flavors', str(content['flavor_id']) ) ), 'rel':'bookmark'}] 
                                }
            del content['flavor_id']
        if 'image_id' in content:
            if content['image_id'] is not None:
                content['image'] = {'id':content['image_id'], 
                                    'links':[{'href':  "/".join( (my.url_preffix, content['tenant_id'], 'images', str(content['image_id']) ) ), 'rel':'bookmark'}]
                                }
            del content['image_id']
        change_keys_http2db(content, http2db_server, reverse=True)
        if 'extended' in content:
            if 'devices' in content['extended']: change_keys_http2db(content['extended']['devices'], http2db_server, reverse=True)
            
        data={'server' : content}
        return format_out(data)
    else:
        bottle.abort(-result, content)
        return

@bottle.route(url_base + '/<tenant_id>/servers', method='POST')
def http_post_server_id(tenant_id):
    '''deploys a new server'''
    my = config_dic['http_threads'][ threading.current_thread().name ]
    #check valid tenant_id
    result,content = check_valid_tenant(my, tenant_id)
    if result != 0:
        bottle.abort(result, content)
        return
    if tenant_id=='any':
        bottle.abort(HTTP_Bad_Request, "Invalid tenant 'any' with this command")
    #chek input
    http_content = format_in( server_new_schema )
    r = remove_extra_items(http_content, server_new_schema)
    if r is not None: print "http_post_serves: Warning: remove extra items ", r
    change_keys_http2db(http_content['server'], http2db_server)
    extended_dict = http_content['server'].get('extended', None)
    if extended_dict is not None:
        result, content = check_extended(extended_dict, True)
        if result<0:
            print "http_post_servers wrong input extended error %d %s" % (result, content)
            bottle.abort(-result, content)
            return
        convert_bandwidth(extended_dict)
        if 'devices' in extended_dict: change_keys_http2db(extended_dict['devices'], http2db_server)

    server = http_content['server']
    server_start = server.get('start', 'yes')
    server['tenant_id'] = tenant_id
    #check flavor valid and take info
    result, content = my.db.get_table(FROM='tenants_flavors as tf join flavors as f on tf.flavor_id=f.uuid',
             SELECT=('ram','vcpus','extended'), WHERE={'uuid':server['flavor_id'], 'tenant_id':tenant_id})
    if result<=0:
        bottle.abort(HTTP_Not_Found, 'flavor_id %s not found' % server['flavor_id'])
        return
    server['flavor']=content[0]
    #check image valid and take info
    result, content = my.db.get_table(FROM='tenants_images as ti right join images as i on ti.image_id=i.uuid',
                                      SELECT=('path', 'metadata', 'image_id'),
                                      WHERE={'uuid':server['image_id'], "status":"ACTIVE"},
                                      WHERE_OR={'tenant_id':tenant_id, 'public': 'yes'},
                                      WHERE_AND_OR="AND",
                                      DISTINCT=True)
    if result<=0:
        bottle.abort(HTTP_Not_Found, 'image_id %s not found or not ACTIVE' % server['image_id'])
        return
    for image_dict in content:
        if image_dict.get("image_id"):
            break
    else:
        # insert in data base tenants_images
        r2, c2 = my.db.new_row('tenants_images', {'image_id': server['image_id'], 'tenant_id': tenant_id})
        if r2<=0:
            bottle.abort(HTTP_Not_Found, 'image_id %s cannot be used. Error %s' % (server['image_id'], c2))
            return
    server['image']={"path": content[0]["path"], "metadata": content[0]["metadata"]}
    if "hosts_id" in server:
        result, content = my.db.get_table(FROM='hosts', SELECT=('uuid',), WHERE={'uuid': server['host_id']})
        if result<=0:
            bottle.abort(HTTP_Not_Found, 'hostId %s not found' % server['host_id'])
            return
    #print json.dumps(server, indent=4)
     
    result, content = ht.create_server(server, config_dic['db'], config_dic['db_lock'], config_dic['mode']=='normal')

    if result >= 0:
    #Insert instance to database
        nets=[]
        print
        print "inserting at DB"
        print
        if server_start == 'no':
            content['status'] = 'INACTIVE'
        dhcp_nets_id = []
        for net in http_content['server']['networks']:
            if net['type'] == 'instance:ovs':
                dhcp_nets_id.append(get_network_id(net['net_id']))

        ports_to_free = []
        new_instance_result, new_instance = my.db.new_instance(content, nets, ports_to_free)
        if new_instance_result < 0:
            print "Error http_post_servers() :", new_instance_result, new_instance
            bottle.abort(-new_instance_result, new_instance)
            return
        print
        print "inserted at DB"
        print


        for port in ports_to_free:
            r,c = config_dic['host_threads'][ server['host_id'] ].insert_task( 'restore-iface',*port )
            if r < 0:
                print ' http_post_servers ERROR RESTORE IFACE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!' +  c
        # update nets
        for net_id in nets:
            try:
                my.ovim.net_update_ofc_thread(net_id)
            except ovim.ovimException as e:
                my.logger.error("http_post_servers, Error updating network with id '{}', '{}'".format(net_id, str(e)))

        # look for dhcp ip address
        r2, c2 = my.db.get_table(FROM="ports", SELECT=["mac", "ip_address", "net_id"], WHERE={"instance_id": new_instance})
        if r2 >0:
            for iface in c2:
                if config_dic.get("dhcp_server") and iface["net_id"] in config_dic["dhcp_nets"]:
                    #print "dhcp insert add task"
                    r,c = config_dic['dhcp_thread'].insert_task("add", iface["mac"])
                    if r < 0:
                        print ':http_post_servers ERROR UPDATING dhcp_server !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!' +  c

                #ensure compute contain the bridge for ovs networks:
                if iface.get("net_id"):
                    server_net = get_network_id(iface['net_id'])
                    if server_net["network"].get('provider:physical', "")[:3] == 'OVS':
                        vlan = str(server_net['network']['provider:vlan'])
                        dhcp_enable = bool(server_net['network']['enable_dhcp'])
                        vm_dhcp_ip = c2[0]["ip_address"]
                        config_dic['host_threads'][server['host_id']].insert_task("create-ovs-bridge-port", vlan)

                        dns = yaml.safe_load(server_net['network'].get("dns"))
                        routes = yaml.safe_load(server_net['network'].get("routes"))
                        links = yaml.safe_load(server_net['network'].get("links"))
                        if dhcp_enable:
                            dhcp_firt_ip = str(server_net['network']['dhcp_first_ip'])
                            dhcp_last_ip = str(server_net['network']['dhcp_last_ip'])
                            dhcp_cidr = str(server_net['network']['cidr'])
                            gateway = str(server_net['network']['gateway_ip'])

                            http_controller = config_dic['http_threads'][threading.current_thread().name]
                            http_controller.ovim.launch_dhcp_server(vlan, dhcp_firt_ip, dhcp_last_ip,
                                                                    dhcp_cidr, gateway, dns, routes)
                            set_mac_dhcp(vm_dhcp_ip, vlan, dhcp_firt_ip, dhcp_last_ip, dhcp_cidr, c2[0]['mac'])

                        if links:
                            http_controller.ovim.launch_link_bridge_to_ovs(vlan, gateway, dhcp_cidr, links, routes)


        #Start server
        server['uuid'] = new_instance
        server_start = server.get('start', 'yes')

        if server_start != 'no':
            server['paused'] = True if server_start == 'paused' else False
            server['action'] = {"start":None}
            server['status'] = "CREATING"
            #Program task
            r,c = config_dic['host_threads'][ server['host_id'] ].insert_task( 'instance',server )
            if r<0:
                my.db.update_rows('instances', {'status':"ERROR"}, {'uuid':server['uuid'], 'last_error':c}, log=True)
        
        return http_get_server_id(tenant_id, new_instance)
    else:
        bottle.abort(HTTP_Bad_Request, content)
        return


def http_server_action(server_id, tenant_id, action):
    '''Perform actions over a server as resume, reboot, terminate, ...'''
    my = config_dic['http_threads'][ threading.current_thread().name ]
    server={"uuid": server_id, "action":action}
    where={'uuid': server_id}
    if tenant_id!='any':
        where['tenant_id']= tenant_id
    result, content = my.db.get_table(FROM='instances', WHERE=where)
    if result == 0:
        bottle.abort(HTTP_Not_Found, "server %s not found" % server_id)
        return
    if result < 0:
        print "http_post_server_action error getting data %d %s" % (result, content)
        bottle.abort(HTTP_Internal_Server_Error, content)
        return
    server.update(content[0])
    tenant_id = server["tenant_id"]

    #TODO check a right content
    new_status = None
    if 'terminate' in action:
        new_status='DELETING'
    elif server['status'] == 'ERROR': #or server['status'] == 'CREATING':
        if 'terminate' not in action and 'rebuild' not in action:
            bottle.abort(HTTP_Method_Not_Allowed, "Server is in ERROR status, must be rebuit or deleted ")
            return
#     elif server['status'] == 'INACTIVE':
#         if 'start' not in action and 'createImage' not in action:
#             bottle.abort(HTTP_Method_Not_Allowed, "The only possible action over an instance in 'INACTIVE' status is 'start'")
#             return
#         if 'start' in action:
#             new_status='CREATING'
#             server['paused']='no'
#     elif server['status'] == 'PAUSED':
#         if 'resume' not in action:
#             bottle.abort(HTTP_Method_Not_Allowed, "The only possible action over an instance in 'PAUSED' status is 'resume'")
#             return
#     elif server['status'] == 'ACTIVE':
#         if 'pause' not in action and 'reboot'not in action and 'shutoff'not in action:
#             bottle.abort(HTTP_Method_Not_Allowed, "The only possible action over an instance in 'ACTIVE' status is 'pause','reboot' or 'shutoff'")
#             return

    if 'start' in action or 'createImage' in action or 'rebuild' in action:
        #check image valid and take info
        image_id = server['image_id']
        if 'createImage' in action:
            if 'imageRef' in action['createImage']:
                image_id = action['createImage']['imageRef']
            elif 'disk' in action['createImage']:
                result, content = my.db.get_table(FROM='instance_devices',
                    SELECT=('image_id','dev'), WHERE={'instance_id':server['uuid'],"type":"disk"})
                if result<=0:
                    bottle.abort(HTTP_Not_Found, 'disk not found for server')
                    return
                elif result>1:
                    disk_id=None
                    if action['createImage']['imageRef']['disk'] != None:
                        for disk in content:
                            if disk['dev'] == action['createImage']['imageRef']['disk']:
                                disk_id = disk['image_id']
                                break
                        if disk_id == None:
                            bottle.abort(HTTP_Not_Found, 'disk %s not found for server' % action['createImage']['imageRef']['disk'])
                            return
                    else:
                        bottle.abort(HTTP_Not_Found, 'more than one disk found for server' )
                        return
                    image_id = disk_id    
                else: #result==1
                    image_id = content[0]['image_id']    
                
        result, content = my.db.get_table(FROM='tenants_images as ti right join images as i on ti.image_id=i.uuid',
            SELECT=('path','metadata'), WHERE={'uuid':image_id, "status":"ACTIVE"},
            WHERE_OR={'tenant_id':tenant_id, 'public': 'yes'}, WHERE_AND_OR="AND", DISTINCT=True)
        if result<=0:
            bottle.abort(HTTP_Not_Found, 'image_id %s not found or not ACTIVE' % image_id)
            return
        if content[0]['metadata'] is not None:
            try:
                metadata = json.loads(content[0]['metadata'])
            except:
                return -HTTP_Internal_Server_Error, "Can not decode image metadata"
            content[0]['metadata']=metadata
        else:
            content[0]['metadata'] = {}
        server['image']=content[0]
        if 'createImage' in action:
            action['createImage']['source'] = {'image_id': image_id, 'path': content[0]['path']}
    if 'createImage' in action:
        #Create an entry in Database for the new image
        new_image={'status':'BUILD', 'progress': 0 }
        new_image_metadata=content[0]
        if 'metadata' in server['image'] and server['image']['metadata'] != None:
            new_image_metadata.update(server['image']['metadata'])
        new_image_metadata = {"use_incremental":"no"}
        if 'metadata' in action['createImage']:
            new_image_metadata.update(action['createImage']['metadata'])
        new_image['metadata'] = json.dumps(new_image_metadata)
        new_image['name'] = action['createImage'].get('name', None)
        new_image['description'] = action['createImage'].get('description', None)
        new_image['uuid']=my.db.new_uuid()
        if 'path' in action['createImage']:
            new_image['path'] = action['createImage']['path']
        else:
            new_image['path']="/provisional/path/" + new_image['uuid']
        result, image_uuid = my.db.new_image(new_image, tenant_id)
        if result<=0:
            bottle.abort(HTTP_Bad_Request, 'Error: ' + image_uuid)
            return
        server['new_image'] = new_image

                
    #Program task
    r,c = config_dic['host_threads'][ server['host_id'] ].insert_task( 'instance',server )
    if r<0:
        print "Task queue full at host ", server['host_id']
        bottle.abort(HTTP_Request_Timeout, c)
    if 'createImage' in action and result >= 0:
        return http_get_image_id(tenant_id, image_uuid)
    
    #Update DB only for CREATING or DELETING status
    data={'result' : 'deleting in process'}
    warn_text=""
    if new_status != None and new_status == 'DELETING':
        nets=[]
        ports_to_free=[]

        net_ovs_list = []
        #look for dhcp ip address
        r2, c2 = my.db.get_table(FROM="ports", SELECT=["mac", "net_id"], WHERE={"instance_id": server_id})
        r, c = my.db.delete_instance(server_id, tenant_id, nets, ports_to_free, net_ovs_list, "requested by http")
        for port in ports_to_free:
            r1,c1 = config_dic['host_threads'][ server['host_id'] ].insert_task( 'restore-iface',*port )
            if r1 < 0:
                my.logger.error("http_post_server_action server deletion ERROR at resore-iface!!!! " + c1)
                warn_text += "; Error iface '{}' cannot be restored '{}'".format(str(port), str(e))
        for net_id in nets:
            try:
                my.ovim.net_update_ofc_thread(net_id)
            except ovim.ovimException as e:
                my.logger.error("http_server_action, Error updating network with id '{}', '{}'".format(net_id, str(e)))
                warn_text += "; Error openflow rules of network '{}' cannot be restore '{}'".format(net_id, str (e))

        # look for dhcp ip address
        if r2 >0 and config_dic.get("dhcp_server"):
            for iface in c2:
                if iface["net_id"] in config_dic["dhcp_nets"]:
                    r,c = config_dic['dhcp_thread'].insert_task("del", iface["mac"])
                    #print "dhcp insert del task"
                    if r < 0:
                        print ':http_post_servers ERROR UPDATING dhcp_server !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!' +  c 
        # delete ovs-port and linux bridge, contains a list of tuple (net_id,vlan, vm_ip, mac)

        for net in net_ovs_list:
            mac = str(net[3])
            vm_ip = str(net[2])
            vlan = str(net[1])
            net_id = net[0]

            delete_dhcp_ovs_bridge(vlan, net_id)
            delete_mac_dhcp(vm_ip, vlan, mac)

            net_data = my.ovim.show_network(net_id)
            if net_data.get('links'):
                links = yaml.load(net_data.get('links'))
                my.ovim.delete_link_bridge_to_ovs(vlan, links)

            config_dic['host_threads'][server['host_id']].insert_task('del-ovs-port', vlan, net_id)
    if warn_text:
        data["result"] += warn_text
    return format_out(data)



@bottle.route(url_base + '/<tenant_id>/servers/<server_id>', method='DELETE')
def http_delete_server_id(tenant_id, server_id):
    '''delete a server'''
    my = config_dic['http_threads'][ threading.current_thread().name ]
    #check valid tenant_id
    result,content = check_valid_tenant(my, tenant_id)
    if result != 0:
        bottle.abort(result, content)
        return

    return http_server_action(server_id, tenant_id, {"terminate":None} )

    
@bottle.route(url_base + '/<tenant_id>/servers/<server_id>/action', method='POST')
def http_post_server_action(tenant_id, server_id):
    '''take an action over a server'''
    my = config_dic['http_threads'][ threading.current_thread().name ]
    #check valid tenant_id
    result,content = check_valid_tenant(my, tenant_id)
    if result != 0:
        bottle.abort(result, content)
        return
    http_content = format_in( server_action_schema )
    #r = remove_extra_items(http_content, server_action_schema)
    #if r is not None: print "http_post_server_action: Warning: remove extra items ", r
    
    return http_server_action(server_id, tenant_id, http_content)

#
# NETWORKS
#


@bottle.route(url_base + '/networks', method='GET')
def http_get_networks():
    """
    Get all networks available
    :return:
    """
    my = config_dic['http_threads'][threading.current_thread().name]

    try:
        # obtain data
        select_, where_, limit_ = filter_query_string(bottle.request.query, http2db_network,
                                                      ('id', 'name', 'tenant_id', 'type',
                                                       'shared', 'provider:vlan', 'status', 'last_error',
                                                       'admin_state_up', 'provider:physical'))
        if "tenant_id" in where_:
            del where_["tenant_id"]

        content = my.ovim.get_networks(select_, where_, limit_)

        delete_nulls(content)
        change_keys_http2db(content, http2db_network, reverse=True)
        data = {'networks': content}
        return format_out(data)

    except ovim.ovimException as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(e.http_code, str(e))
    except Exception as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(HTTP_Bad_Request, str(e))


@bottle.route(url_base + '/networks/<network_id>', method='GET')
def http_get_network_id(network_id):
    """
    Get a network data by id
    :param network_id:
    :return:
    """
    data = get_network_id(network_id)
    return format_out(data)


def get_network_id(network_id):
    """
    Get network from DB by id
    :param network_id: network Id
    :return:
    """
    my = config_dic['http_threads'][threading.current_thread().name]

    try:
        # obtain data
        where_ = bottle.request.query
        content = my.ovim.show_network(network_id, where_)

        change_keys_http2db(content, http2db_network, reverse=True)
        delete_nulls(content)
        data = {'network': content}
        return data
    except ovim.ovimException as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(e.http_code, str(e))
    except Exception as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(HTTP_Bad_Request, str(e))


@bottle.route(url_base + '/networks', method='POST')
def http_post_networks():
    """
    Insert a network into the database.
    :return:
    """
    my = config_dic['http_threads'][threading.current_thread().name]

    try:
        # parse input data
        http_content = format_in(network_new_schema)
        r = remove_extra_items(http_content, network_new_schema)
        if r is not None:
            print "http_post_networks: Warning: remove extra items ", r
        change_keys_http2db(http_content['network'], http2db_network)
        network = http_content['network']
        content = my.ovim.new_network(network)
        return format_out(get_network_id(content))
    except ovim.ovimException as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(e.http_code, str(e))
    except Exception as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(HTTP_Bad_Request, str(e))


@bottle.route(url_base + '/networks/<network_id>', method='PUT')
def http_put_network_id(network_id):
    """
    Update a network_id into DB.
    :param network_id: network id
    :return:
    """
    my = config_dic['http_threads'][threading.current_thread().name]
    
    try:
        # parse input data
        http_content = format_in(network_update_schema)
        change_keys_http2db(http_content['network'], http2db_network)
        network = http_content['network']
        return format_out(my.ovim.edit_network(network_id, network))

    except ovim.ovimException as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(e.http_code, str(e))
    except Exception as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(HTTP_Bad_Request, str(e))


@bottle.route(url_base + '/networks/<network_id>', method='DELETE')
def http_delete_network_id(network_id):
    """
    Delete a network_id from the database.
    :param network_id: Network id
    :return:
    """
    my = config_dic['http_threads'][threading.current_thread().name]

    try:
        # delete from the data base
        content = my.ovim.delete_network(network_id)
        data = {'result': content}
        return format_out(data)

    except ovim.ovimException as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(e.http_code, str(e))
    except Exception as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(HTTP_Bad_Request, str(e))

#
# OPENFLOW
#


@bottle.route(url_base + '/openflow/controller', method='GET')
def http_get_openflow_controller():
    """
    Retrieve a openflow controllers list from DB.
    :return:
    """
    # TODO check if show a proper list
    my = config_dic['http_threads'][threading.current_thread().name]

    try:
        select_, where_, limit_ = filter_query_string(bottle.request.query, http2db_ofc,
                                                      ('id', 'name', 'dpid', 'ip', 'port', 'type',
                                                       'version', 'user', 'password'))

        content = my.ovim.get_of_controllers(select_, where_)
        delete_nulls(content)
        change_keys_http2db(content, http2db_ofc, reverse=True)
        data = {'ofcs': content}
        return format_out(data)
    except ovim.ovimException as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(e.http_code, str(e))
    except Exception as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(HTTP_Bad_Request, str(e))


@bottle.route(url_base + '/openflow/controller/<uuid>', method='GET')
def http_get_openflow_controller_id(uuid):
    """
    Get an openflow controller by dpid from DB.get_of_controllers
    """
    my = config_dic['http_threads'][threading.current_thread().name]

    try:

        content = my.ovim.show_of_controller(uuid)
        delete_nulls(content)
        change_keys_http2db(content, http2db_ofc, reverse=True)
        data = {'ofc': content}
        return format_out(data)
    except ovim.ovimException as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(e.http_code, str(e))
    except Exception as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(HTTP_Bad_Request, str(e))


@bottle.route(url_base + '/openflow/controller/', method='POST')
def http_post_openflow_controller():
    """
    Create a new openflow controller into DB
    :return:
    """
    my = config_dic['http_threads'][threading.current_thread().name]

    try:
        http_content = format_in(openflow_controller_schema)
        of_c = http_content['ofc']
        uuid = my.ovim.new_of_controller(of_c)
        content = my.ovim.show_of_controller(uuid)
        delete_nulls(content)
        change_keys_http2db(content, http2db_ofc, reverse=True)
        data = {'ofc': content}
        return format_out(data)
    except ovim.ovimException as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(e.http_code, str(e))
    except Exception as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(HTTP_Bad_Request, str(e))


@bottle.route(url_base + '/openflow/controller/<of_controller_id>', method='PUT')
def http_put_openflow_controller_by_id(of_controller_id):
    """
    Create an openflow controller into DB
    :param of_controller_id: openflow controller dpid
    :return:
    """
    my = config_dic['http_threads'][threading.current_thread().name]

    try:
        http_content = format_in(openflow_controller_schema)
        of_c = http_content['ofc']

        content = my.ovim.edit_of_controller(of_controller_id, of_c)
        delete_nulls(content)
        change_keys_http2db(content, http2db_ofc, reverse=True)
        data = {'ofc': content}
        return format_out(data)
    except ovim.ovimException as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(e.http_code, str(e))
    except Exception as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(HTTP_Bad_Request, str(e))


@bottle.route(url_base + '/openflow/controller/<of_controller_id>', method='DELETE')
def http_delete_openflow_controller(of_controller_id):
    """
    Delete  an openflow controller from DB.
    :param of_controller_id: openflow controller dpid
    :return:
    """
    my = config_dic['http_threads'][threading.current_thread().name]

    try:
        content = my.ovim.delete_of_controller(of_controller_id)
        data = {'result': content}
        return format_out(data)
    except ovim.ovimException as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(e.http_code, str(e))
    except Exception as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(HTTP_Bad_Request, str(e))


@bottle.route(url_base + '/networks/<network_id>/openflow', method='GET')
def http_get_openflow_id(network_id):
    """
    To obtain the list of openflow rules of a network
    :param network_id: network id
    :return:
    """
    my = config_dic['http_threads'][threading.current_thread().name]

    # ignore input data
    if network_id == 'all':
        network_id = None
    try:
        content = my.ovim.get_openflow_rules(network_id)
        data = {'openflow-rules': content}
    except ovim.ovimException as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(e.http_code, str(e))
    except Exception as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(HTTP_Bad_Request, str(e))

    return format_out(data)


@bottle.route(url_base + '/networks/<network_id>/openflow', method='PUT')
def http_put_openflow_id(network_id):
    """
    To make actions over the net. The action is to reinstall the openflow rules
    network_id can be 'all'
    :param network_id: network id
    :return:
    """
    my = config_dic['http_threads'][threading.current_thread().name]

    if not my.admin:
        bottle.abort(HTTP_Unauthorized, "Needed admin privileges")

    if network_id == 'all':
        network_id = None

    try:
        result = my.ovim.edit_openflow_rules(network_id)
    except ovim.ovimException as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(e.http_code, str(e))
    except Exception as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(HTTP_Bad_Request, str(e))

    data = {'result': str(result) + " nets updates"}
    return format_out(data)

@bottle.route(url_base + '/networks/clear/openflow/<ofc_id>', method='DELETE')
@bottle.route(url_base + '/networks/clear/openflow', method='DELETE')
def http_clear_openflow_rules(ofc_id=None):
    """
    To make actions over the net. The action is to delete ALL openflow rules
    :return:
    """
    my = config_dic['http_threads'][ threading.current_thread().name]

    if not my.admin:
        bottle.abort(HTTP_Unauthorized, "Needed admin privileges")
    try:
        my.ovim.delete_openflow_rules(ofc_id)
    except ovim.ovimException as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(e.http_code, str(e))
    except Exception as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(HTTP_Bad_Request, str(e))

    data = {'result': " Clearing openflow rules in process"}
    return format_out(data)

@bottle.route(url_base + '/networks/openflow/ports/<ofc_id>', method='GET')
@bottle.route(url_base + '/networks/openflow/ports', method='GET')
def http_get_openflow_ports(ofc_id=None):
    """
    Obtain switch ports names of openflow controller
    :return:
    """
    my = config_dic['http_threads'][threading.current_thread().name]

    try:
        ports = my.ovim.get_openflow_ports(ofc_id)
        data = {'ports': ports}
    except ovim.ovimException as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(e.http_code, str(e))
    except Exception as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(HTTP_Bad_Request, str(e))

    return format_out(data)
#
# PORTS
#


@bottle.route(url_base + '/ports', method='GET')
def http_get_ports():
    #obtain data
    my = config_dic['http_threads'][ threading.current_thread().name ]
    select_,where_,limit_ = filter_query_string(bottle.request.query, http2db_port,
            ('id','name','tenant_id','network_id','vpci','mac_address','device_owner','device_id',
             'binding:switch_port','binding:vlan','bandwidth','status','admin_state_up','ip_address') )
    try:
        ports = my.ovim.get_ports(columns=select_, filter=where_, limit=limit_)
        delete_nulls(ports)
        change_keys_http2db(ports, http2db_port, reverse=True)
        data={'ports' : ports}
        return format_out(data)
    except ovim.ovimException as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(e.http_code, str(e))
    except Exception as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(HTTP_Bad_Request, str(e))

@bottle.route(url_base + '/ports/<port_id>', method='GET')
def http_get_port_id(port_id):
    my = config_dic['http_threads'][ threading.current_thread().name ]
    try:
        ports = my.ovim.get_ports(filter={"uuid": port_id})
        if not ports:
            bottle.abort(HTTP_Not_Found, 'port %s not found' % port_id)
            return
        delete_nulls(ports)
        change_keys_http2db(ports, http2db_port, reverse=True)
        data = {'port': ports[0]}
        return format_out(data)
    except ovim.ovimException as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(e.http_code, str(e))
    except Exception as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(HTTP_Bad_Request, str(e))

@bottle.route(url_base + '/ports', method='POST')
def http_post_ports():
    '''insert an external port into the database.'''
    my = config_dic['http_threads'][ threading.current_thread().name ]
    if not my.admin:
        bottle.abort(HTTP_Unauthorized, "Needed admin privileges")
    #parse input data
    http_content = format_in( port_new_schema )
    r = remove_extra_items(http_content, port_new_schema)
    if r is not None: print "http_post_ports: Warning: remove extra items ", r
    change_keys_http2db(http_content['port'], http2db_port)
    port=http_content['port']
    try:
        port_id = my.ovim.new_port(port)
        ports = my.ovim.get_ports(filter={"uuid": port_id})
        if not ports:
            bottle.abort(HTTP_Internal_Server_Error, "port '{}' inserted but not found at database".format(port_id))
            return
        delete_nulls(ports)
        change_keys_http2db(ports, http2db_port, reverse=True)
        data = {'port': ports[0]}
        return format_out(data)
    except ovim.ovimException as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(e.http_code, str(e))
    except Exception as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(HTTP_Bad_Request, str(e))

@bottle.route(url_base + '/ports/<port_id>', method='PUT')
def http_put_port_id(port_id):
    '''update a port_id into the database.'''
    my = config_dic['http_threads'][ threading.current_thread().name ]
    #parse input data
    http_content = format_in( port_update_schema )
    change_keys_http2db(http_content['port'], http2db_port)
    port_dict=http_content['port']

    for k in ('vlan', 'switch_port', 'mac_address', 'tenant_id'):
        if k in port_dict and not my.admin:
            bottle.abort(HTTP_Unauthorized, "Needed admin privileges for changing " + k)
            return
    try:
        port_id = my.ovim.edit_port(port_id, port_dict, my.admin)
        ports = my.ovim.get_ports(filter={"uuid": port_id})
        if not ports:
            bottle.abort(HTTP_Internal_Server_Error, "port '{}' edited but not found at database".format(port_id))
            return
        delete_nulls(ports)
        change_keys_http2db(ports, http2db_port, reverse=True)
        data = {'port': ports[0]}
        return format_out(data)
    except ovim.ovimException as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(e.http_code, str(e))
    except Exception as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(HTTP_Bad_Request, str(e))


@bottle.route(url_base + '/ports/<port_id>', method='DELETE')
def http_delete_port_id(port_id):
    '''delete a port_id from the database.'''
    my = config_dic['http_threads'][ threading.current_thread().name ]
    if not my.admin:
        bottle.abort(HTTP_Unauthorized, "Needed admin privileges")
        return
    try:
        result = my.ovim.delete_port(port_id)
        data = {'result': result}
        return format_out(data)
    except ovim.ovimException as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(e.http_code, str(e))
    except Exception as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(HTTP_Bad_Request, str(e))


@bottle.route(url_base + '/openflow/mapping', method='POST')
def http_of_port_mapping():
    """
    Create new compute port mapping entry
    :return:
    """
    my = config_dic['http_threads'][threading.current_thread().name]

    try:
        http_content = format_in(of_port_map_new_schema)
        r = remove_extra_items(http_content, of_port_map_new_schema)
        if r is not None:
            my.logger.error("http_of_port_mapping: Warning: remove extra items " + str(r), exc_info=True)

        # insert in data base
        port_mapping = my.ovim.set_of_port_mapping(http_content['of_port_mapings'])
        change_keys_http2db(port_mapping, http2db_id, reverse=True)
        delete_nulls(port_mapping)
        data = {'of_port_mappings': port_mapping}
        return format_out(data)
    except ovim.ovimException as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(e.http_code, str(e))
    except Exception as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(HTTP_Bad_Request, str(e))


@bottle.route(url_base + '/openflow/mapping', method='GET')
def get_of_port_mapping():
    """
    Get compute port mapping
    :return:
    """
    my = config_dic['http_threads'][threading.current_thread().name]

    try:
        select_, where_, limit_ = filter_query_string(bottle.request.query, http2db_id,
                                                      ('id', 'ofc_id', 'region', 'compute_node', 'pci',
                                                       'switch_dpid', 'switch_port', 'switch_mac'))
        # insert in data base
        port_mapping = my.ovim.get_of_port_mappings(select_, where_)
        change_keys_http2db(port_mapping, http2db_id, reverse=True)
        delete_nulls(port_mapping)
        data = {'of_port_mappings': port_mapping}
        return format_out(data)
    except ovim.ovimException as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(e.http_code, str(e))
    except Exception as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(HTTP_Bad_Request, str(e))


@bottle.route(url_base + '/openflow/mapping/<region>', method='DELETE')
def delete_of_port_mapping(region):
    """
    Insert a tenant into the database.
    :return:
    """
    my = config_dic['http_threads'][threading.current_thread().name]

    try:
        # insert in data base
        db_filter = {'region': region}
        result = my.ovim.clear_of_port_mapping(db_filter)
        data = {'result': result}
        return format_out(data)
    except ovim.ovimException as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(e.http_code, str(e))
    except Exception as e:
        my.logger.error(str(e), exc_info=True)
        bottle.abort(HTTP_Bad_Request, str(e))