VIM refreshing of VM status at vim_thread
[osm/RO.git] / nfvo.py
diff --git a/nfvo.py b/nfvo.py
index 4565f00..724766b 100644 (file)
--- a/nfvo.py
+++ b/nfvo.py
@@ -40,16 +40,29 @@ import logging
 import collections
 from db_base import db_base_Exception
 
+import nfvo_db
+from threading import Lock
+from time import time
+import openvim.ovim as Ovim
+
 global global_config
 global vimconn_imported
 global logger
 global default_volume_size
 default_volume_size = '5' #size in GB
-
+global ovim
+ovim = None
+global_config = None
 
 vimconn_imported = {}   # dictionary with VIM type as key, loaded module as value
 vim_threads = {"running":{}, "deleting": {}, "names": []}      # threads running for attached-VIMs
+vim_persistent_info = {}
 logger = logging.getLogger('openmano.nfvo')
+task_lock = Lock()
+global_instance_tasks = {}
+last_task_id = 0.0
+db=None
+db_lock=Lock()
 
 class NfvoException(Exception):
     def __init__(self, message, http_code):
@@ -57,12 +70,33 @@ class NfvoException(Exception):
         Exception.__init__(self, message)
 
 
+def get_task_id():
+    global last_task_id
+    task_id = time()
+    if task_id <= last_task_id:
+        task_id = last_task_id + 0.000001
+    last_task_id = task_id
+    return "TASK.{:.6f}".format(task_id)
+
+
+def new_task(name, params, depends=None):
+    task_id = get_task_id()
+    task = {"status": "enqueued", "id": task_id, "name": name, "params": params}
+    if depends:
+        task["depends"] = depends
+    return task
+
+
+def is_task_id(id):
+    return True if id[:5] == "TASK." else False
+
+
 def get_non_used_vim_name(datacenter_name, datacenter_id, tenant_name, tenant_id):
     name = datacenter_name[:16]
     if name not in vim_threads["names"]:
         vim_threads["names"].append(name)
         return name
-    name = datatacenter_name[:16] + "." + tenant_name[:16]
+    name = datacenter_name[:16] + "." + tenant_name[:16]
     if name not in vim_threads["names"]:
         vim_threads["names"].append(name)
         return name
@@ -72,6 +106,34 @@ def get_non_used_vim_name(datacenter_name, datacenter_id, tenant_name, tenant_id
 
 
 def start_service(mydb):
+    global db, global_config
+    db = nfvo_db.nfvo_db()
+    db.connect(global_config['db_host'], global_config['db_user'], global_config['db_passwd'], global_config['db_name'])
+    global ovim
+
+    # Initialize openvim for SDN control
+    # TODO: Avoid static configuration by adding new parameters to openmanod.cfg
+    # TODO: review ovim.py to delete not needed configuration
+    ovim_configuration = {
+        'logger_name': 'openvim',
+        'network_vlan_range_start': 1000,
+        'network_vlan_range_end': 4096,
+        'log_level_db': 'DEBUG',
+        'db_name': 'mano_vim_db',
+        'db_host': 'localhost',
+        'db_user': 'vim',
+        'db_passwd': 'vimpw',
+        'database_version': '0.15',
+        'bridge_ifaces': {},
+        'mode': 'normal',
+        'of_controller_nets_with_same_vlan': True,
+        'network_type': 'bridge',
+        #TODO: log_level_of should not be needed. To be modified in ovim
+        'log_level_of': 'DEBUG'
+    }
+    ovim = Ovim.ovim(ovim_configuration)
+    ovim.start_service()
+
     from_= 'tenants_datacenters as td join datacenters as d on td.datacenter_id=d.uuid join datacenter_tenants as dt on td.datacenter_tenant_id=dt.uuid'
     select_ = ('type','d.config as config','d.uuid as datacenter_id', 'vim_url', 'vim_url_admin', 'd.name as datacenter_name',
                    'dt.uuid as datacenter_tenant_id','dt.vim_tenant_name as vim_tenant_name','dt.vim_tenant_id as vim_tenant_id',
@@ -79,7 +141,8 @@ def start_service(mydb):
     try:
         vims = mydb.get_rows(FROM=from_, SELECT=select_)
         for vim in vims:
-            extra={'datacenter_tenant_id': vim.get('datacenter_tenant_id')}
+            extra={'datacenter_tenant_id': vim.get('datacenter_tenant_id'),
+                   'datacenter_id': vim.get('datacenter_id')}
             if vim["config"]:
                 extra.update(yaml.load(vim["config"]))
             if vim.get('dt_config'):
@@ -95,33 +158,43 @@ def start_service(mydb):
                     if module_info and module_info[0]:
                         file.close(module_info[0])
                     raise NfvoException("Unknown vim type '{}'. Can not open file '{}.py'; {}: {}".format(
-                                            vim["type"], module, type(e).__name__, str(e)), HTTP_Bad_Request)
+                        vim["type"], module, type(e).__name__, str(e)), HTTP_Bad_Request)
 
+            thread_id = vim['datacenter_tenant_id']
+            vim_persistent_info[thread_id] = {}
             try:
                 #if not tenant:
                 #    return -HTTP_Bad_Request, "You must provide a valid tenant name or uuid for VIM  %s" % ( vim["type"])
                 myvim = vimconn_imported[ vim["type"] ].vimconnector(
-                                uuid=vim['datacenter_id'], name=vim['datacenter_name'],
-                                tenant_id=vim['vim_tenant_id'], tenant_name=vim['vim_tenant_name'],
-                                url=vim['vim_url'], url_admin=vim['vim_url_admin'],
-                                user=vim['user'], passwd=vim['passwd'],
-                                config=extra
-                        )
+                    uuid=vim['datacenter_id'], name=vim['datacenter_name'],
+                    tenant_id=vim['vim_tenant_id'], tenant_name=vim['vim_tenant_name'],
+                    url=vim['vim_url'], url_admin=vim['vim_url_admin'],
+                    user=vim['user'], passwd=vim['passwd'],
+                    config=extra, persistent_info=vim_persistent_info[thread_id]
+                )
             except Exception as e:
                 raise NfvoException("Error at VIM  {}; {}: {}".format(vim["type"], type(e).__name__, str(e)), HTTP_Internal_Server_Error)
             thread_name = get_non_used_vim_name(vim['datacenter_name'], vim['vim_tenant_id'], vim['vim_tenant_name'], vim['vim_tenant_id'])
-            new_thread = vim_thread.vim_thread(myvim, thread_name)
+            new_thread = vim_thread.vim_thread(myvim, task_lock, thread_name, vim['datacenter_name'],
+                                               vim['datacenter_tenant_id'], db=db, db_lock=db_lock, ovim=ovim)
             new_thread.start()
-            thread_id = vim["datacenter_id"] + "-" + vim['nfvo_tenant_id']
             vim_threads["running"][thread_id] = new_thread
     except db_base_Exception as e:
         raise NfvoException(str(e) + " at nfvo.get_vim", e.http_code)
 
+
 def stop_service():
+    global ovim, global_config
+    if ovim:
+        ovim.stop_service()
     for thread_id,thread in vim_threads["running"].items():
-        thread.insert_task("exit")
+        thread.insert_task(new_task("exit", None))
         vim_threads["deleting"][thread_id] = thread
-    vim_threads["running"]={}
+    vim_threads["running"] = {}
+    if global_config and global_config.get("console_thread"):
+        for thread in global_config["console_thread"]:
+            thread.terminate = True
+
 
 def get_flavorlist(mydb, vnf_id, nfvo_tenant=None):
     '''Obtain flavorList
@@ -144,6 +217,7 @@ def get_flavorlist(mydb, vnf_id, nfvo_tenant=None):
         flavorList.append(flavor['flavor_id'])
     return flavorList
 
+
 def get_imagelist(mydb, vnf_id, nfvo_tenant=None):
     '''Obtain imageList
     return result, content:
@@ -162,6 +236,7 @@ def get_imagelist(mydb, vnf_id, nfvo_tenant=None):
         imageList.append(image['image_id'])
     return imageList
 
+
 def get_vim(mydb, nfvo_tenant=None, datacenter_id=None, datacenter_name=None, datacenter_tenant_id=None,
             vim_tenant=None, vim_tenant_name=None, vim_user=None, vim_passwd=None):
     '''Obtain a dictionary of VIM (datacenter) classes with some of the input parameters
@@ -188,7 +263,8 @@ def get_vim(mydb, nfvo_tenant=None, datacenter_id=None, datacenter_name=None, da
         vims = mydb.get_rows(FROM=from_, SELECT=select_, WHERE=WHERE_dict )
         vim_dict={}
         for vim in vims:
-            extra={'datacenter_tenant_id': vim.get('datacenter_tenant_id')}
+            extra={'datacenter_tenant_id': vim.get('datacenter_tenant_id'),
+                   'datacenter_id': vim.get('datacenter_id')}
             if vim["config"]:
                 extra.update(yaml.load(vim["config"]))
             if vim.get('dt_config'):
@@ -207,14 +283,22 @@ def get_vim(mydb, nfvo_tenant=None, datacenter_id=None, datacenter_name=None, da
                                             vim["type"], module, type(e).__name__, str(e)), HTTP_Bad_Request)
 
             try:
+                if 'datacenter_tenant_id' in vim:
+                    thread_id = vim["datacenter_tenant_id"]
+                    if thread_id not in vim_persistent_info:
+                        vim_persistent_info[thread_id] = {}
+                    persistent_info = vim_persistent_info[thread_id]
+                else:
+                    persistent_info = {}
                 #if not tenant:
                 #    return -HTTP_Bad_Request, "You must provide a valid tenant name or uuid for VIM  %s" % ( vim["type"])
                 vim_dict[ vim['datacenter_id'] ] = vimconn_imported[ vim["type"] ].vimconnector(
                                 uuid=vim['datacenter_id'], name=vim['datacenter_name'],
-                                tenant_id=vim.get('vim_tenant_id',vim_tenant), tenant_name=vim.get('vim_tenant_name',vim_tenant_name),
+                                tenant_id=vim.get('vim_tenant_id',vim_tenant),
+                                tenant_name=vim.get('vim_tenant_name',vim_tenant_name),
                                 url=vim['vim_url'], url_admin=vim['vim_url_admin'],
                                 user=vim.get('user',vim_user), passwd=vim.get('passwd',vim_passwd),
-                                config=extra
+                                config=extra, persistent_info=persistent_info
                         )
             except Exception as e:
                 raise NfvoException("Error at VIM  {}; {}: {}".format(vim["type"], type(e).__name__, str(e)), HTTP_Internal_Server_Error)
@@ -222,6 +306,7 @@ def get_vim(mydb, nfvo_tenant=None, datacenter_id=None, datacenter_name=None, da
     except db_base_Exception as e:
         raise NfvoException(str(e) + " at nfvo.get_vim", e.http_code)
 
+
 def rollback(mydb,  vims, rollback_list):
     undeleted_items=[]
     #delete things by reverse order
@@ -262,6 +347,7 @@ def rollback(mydb,  vims, rollback_list):
     else:
         return False," Rollback fails to delete: " + str(undeleted_items)
 
+
 def check_vnf_descriptor(vnf_descriptor, vnf_descriptor_version=1):
     global global_config
     #create a dictionary with vnfc-name: vnfc:interface-list  key:values pairs
@@ -458,6 +544,7 @@ def create_or_use_image(mydb, vims, image_dict, rollback_list, only_create_at_vi
 
     return image_vim_id if only_create_at_vim else image_mano_id
 
+
 def create_or_use_flavor(mydb, vims, flavor_dict, rollback_list, only_create_at_vim=False, return_on_error = None):
     temp_flavor_dict= {'disk':flavor_dict.get('disk',1),
             'ram':flavor_dict.get('ram'),
@@ -610,6 +697,7 @@ def create_or_use_flavor(mydb, vims, flavor_dict, rollback_list, only_create_at_
 
     return flavor_vim_id if only_create_at_vim else flavor_mano_id
 
+
 def new_vnf(mydb, tenant_id, vnf_descriptor):
     global global_config
 
@@ -744,6 +832,7 @@ def new_vnf(mydb, tenant_id, vnf_descriptor):
         #logger.error("start_scenario %s", error_text)
         raise NfvoException(error_text, e.http_code)
 
+
 def new_vnf_v02(mydb, tenant_id, vnf_descriptor):
     global global_config
 
@@ -877,6 +966,7 @@ def new_vnf_v02(mydb, tenant_id, vnf_descriptor):
         #logger.error("start_scenario %s", error_text)
         raise NfvoException(error_text, e.http_code)
 
+
 def get_vnf_id(mydb, tenant_id, vnf_id):
     #check valid tenant_id
     check_tenant(mydb, tenant_id)
@@ -1034,6 +1124,7 @@ def delete_vnf(mydb,tenant_id,vnf_id,datacenter=None,vim_tenant=None):
     #if undeletedItems:
     #    return "delete_vnf. Undeleted: %s" %(undeletedItems)
 
+
 def get_hosts_info(mydb, nfvo_tenant_id, datacenter_name=None):
     result, vims = get_vim(mydb, nfvo_tenant_id, None, datacenter_name)
     if result < 0:
@@ -1047,6 +1138,7 @@ def get_hosts_info(mydb, nfvo_tenant_id, datacenter_name=None):
     topology = {'name':myvim['name'] , 'servers': servers}
     return result, topology
 
+
 def get_hosts(mydb, nfvo_tenant_id):
     vims = get_vim(mydb, nfvo_tenant_id)
     if len(vims) == 0:
@@ -1082,6 +1174,7 @@ def get_hosts(mydb, nfvo_tenant_id):
     except vimconn.vimconnException as e:
         raise NfvoException("Not possible to get_host_list from VIM: {}".format(str(e)), e.http_code)
 
+
 def new_scenario(mydb, tenant_id, topo):
 
 #    result, vims = get_vim(mydb, tenant_id)
@@ -1365,6 +1458,7 @@ def new_scenario(mydb, tenant_id, topo):
 
     return c
 
+
 def new_scenario_v02(mydb, tenant_id, scenario_dict, version):
     """ This creates a new scenario for version 0.2 and 0.3"""
     scenario = scenario_dict["scenario"]
@@ -1488,12 +1582,14 @@ def new_scenario_v02(mydb, tenant_id, scenario_dict, version):
     scenario_id = mydb.new_scenario(scenario)
     return scenario_id
 
+
 def edit_scenario(mydb, tenant_id, scenario_id, data):
     data["uuid"] = scenario_id
     data["tenant_id"] = tenant_id
     c = mydb.edit_scenario( data )
     return c
 
+
 def start_scenario(mydb, tenant_id, scenario_id, instance_scenario_name, instance_scenario_description, datacenter=None,vim_tenant=None, startvms=True):
     #print "Checking that nfvo_tenant_id exists and getting the VIM URI and the VIM tenant_id"
     datacenter_id, myvim = get_datacenter_by_name_uuid(mydb, tenant_id, datacenter, vim_tenant=vim_tenant)
@@ -1696,6 +1792,7 @@ def start_scenario(mydb, tenant_id, scenario_id, instance_scenario_name, instanc
         #logger.error("start_scenario %s", error_text)
         raise NfvoException(error_text, e.http_code)
 
+
 def unify_cloud_config(cloud_config_preserve, cloud_config):
     ''' join the cloud config information into cloud_config_preserve.
     In case of conflict cloud_config_preserve preserves
@@ -1772,6 +1869,40 @@ def unify_cloud_config(cloud_config_preserve, cloud_config):
     return new_cloud_config
 
 
+def get_vim_thread(mydb, tenant_id, datacenter_id_name=None, datacenter_tenant_id=None):
+    datacenter_id = None
+    datacenter_name = None
+    thread = None
+    try:
+        if datacenter_tenant_id:
+            thread_id = datacenter_tenant_id
+            thread = vim_threads["running"].get(datacenter_tenant_id)
+        else:
+            where_={"td.nfvo_tenant_id": tenant_id}
+            if datacenter_id_name:
+                if utils.check_valid_uuid(datacenter_id_name):
+                    datacenter_id = datacenter_id_name
+                    where_["dt.datacenter_id"] = datacenter_id
+                else:
+                    datacenter_name = datacenter_id_name
+                    where_["d.name"] = datacenter_name
+            if datacenter_tenant_id:
+                where_["dt.uuid"] = datacenter_tenant_id
+            datacenters = mydb.get_rows(
+                SELECT=("dt.uuid as datacenter_tenant_id",),
+                FROM="datacenter_tenants as dt join tenants_datacenters as td on dt.uuid=td.datacenter_tenant_id "
+                     "join datacenters as d on d.uuid=dt.datacenter_id",
+                WHERE=where_)
+            if len(datacenters) > 1:
+                raise NfvoException("More than one datacenters found, try to identify with uuid", HTTP_Conflict)
+            elif datacenters:
+                thread_id = datacenters[0]["datacenter_tenant_id"]
+                thread = vim_threads["running"].get(thread_id)
+        if not thread:
+            raise NfvoException("datacenter '{}' not found".format(str(datacenter_id_name)), HTTP_Not_Found)
+        return thread_id, thread
+    except db_base_Exception as e:
+        raise NfvoException("{} {}".format(type(e).__name__ , str(e)), e.http_code)
 
 def get_datacenter_by_name_uuid(mydb, tenant_id, datacenter_id_name=None, **extra_filter):
     datacenter_id = None
@@ -1789,6 +1920,7 @@ def get_datacenter_by_name_uuid(mydb, tenant_id, datacenter_id_name=None, **extr
         raise NfvoException("More than one datacenters found, try to identify with uuid", HTTP_Conflict)
     return vims.keys()[0], vims.values()[0]
 
+
 def update(d, u):
     '''Takes dict d and updates it with the values in dict u.'''
     '''It merges all depth levels'''
@@ -1800,18 +1932,22 @@ def update(d, u):
             d[k] = u[k]
     return d
 
+
 def create_instance(mydb, tenant_id, instance_dict):
-    #print "Checking that nfvo_tenant_id exists and getting the VIM URI and the VIM tenant_id"
-    #logger.debug("Creating instance...")
+    # print "Checking that nfvo_tenant_id exists and getting the VIM URI and the VIM tenant_id"
+    # logger.debug("Creating instance...")
     scenario = instance_dict["scenario"]
 
     #find main datacenter
     myvims = {}
-    datacenter2tenant = {}
+    myvim_threads_id = {}
+    instance_tasks={}
+    tasks_to_launch={}
     datacenter = instance_dict.get("datacenter")
     default_datacenter_id, vim = get_datacenter_by_name_uuid(mydb, tenant_id, datacenter)
     myvims[default_datacenter_id] = vim
-    datacenter2tenant[default_datacenter_id] = vim['config']['datacenter_tenant_id']
+    myvim_threads_id[default_datacenter_id], _ = get_vim_thread(mydb, tenant_id, default_datacenter_id)
+    tasks_to_launch[myvim_threads_id[default_datacenter_id]] = []
     #myvim_tenant = myvim['tenant_id']
 #    default_datacenter_name = vim['name']
     rollbackList=[]
@@ -1832,9 +1968,9 @@ def create_instance(mydb, tenant_id, instance_dict):
     instance_name = instance_dict["name"]
     instance_description = instance_dict.get("description")
     try:
-    #0 check correct parameters
+        # 0 check correct parameters
         for net_name, net_instance_desc in instance_dict.get("networks",{}).iteritems():
-            found=False
+            found = False
             for scenario_net in scenarioDict['nets']:
                 if net_name == scenario_net["name"]:
                     found = True
@@ -1850,13 +1986,14 @@ def create_instance(mydb, tenant_id, instance_dict):
                         #Add this datacenter to myvims
                         d, v = get_datacenter_by_name_uuid(mydb, tenant_id, site["datacenter"])
                         myvims[d] = v
-                        datacenter2tenant[d] = v['config']['datacenter_tenant_id']
-                        site["datacenter"]  = d #change name to id
+                        myvim_threads_id[d],_ = get_vim_thread(mydb, tenant_id, site["datacenter"])
+                        tasks_to_launch[myvim_threads_id[d]] = []
+                        site["datacenter"] = d #change name to id
                 else:
                     if site_without_datacenter_field:
                         raise NfvoException("Found more than one entries without datacenter field at instance:networks:{}:sites".format(net_name), HTTP_Bad_Request)
                     site_without_datacenter_field = True
-                    site["datacenter"]  = default_datacenter_id #change name to id
+                    site["datacenter"] = default_datacenter_id #change name to id
 
         for vnf_name, vnf_instance_desc in instance_dict.get("vnfs",{}).iteritems():
             found=False
@@ -1867,11 +2004,12 @@ def create_instance(mydb, tenant_id, instance_dict):
             if not found:
                 raise NfvoException("Invalid vnf name '{}' at instance:vnfs".format(vnf_instance_desc), HTTP_Bad_Request)
             if "datacenter" in vnf_instance_desc:
-            #Add this datacenter to myvims
+            # Add this datacenter to myvims
                 if vnf_instance_desc["datacenter"] not in myvims:
                     d, v = get_datacenter_by_name_uuid(mydb, tenant_id, vnf_instance_desc["datacenter"])
                     myvims[d] = v
-                    datacenter2tenant[d] = v['config']['datacenter_tenant_id']
+                    myvim_threads_id[d],_ = get_vim_thread(mydb, tenant_id, vnf_instance_desc["datacenter"])
+                    tasks_to_launch[myvim_threads_id[d]] = []
                 scenario_vnf["datacenter"] = vnf_instance_desc["datacenter"]
 
     #0.1 parse cloud-config parameters
@@ -1910,7 +2048,7 @@ def create_instance(mydb, tenant_id, instance_dict):
         logger.debug("Creating instance scenario-dict MERGED:\n%s", yaml.safe_dump(scenarioDict, indent=4, default_flow_style=False))
 
 
-    #1. Creating new nets (sce_nets) in the VIM"
+        # 1. Creating new nets (sce_nets) in the VIM"
         for sce_net in scenarioDict['nets']:
             sce_net["vim_id_sites"]={}
             descriptor_net =  instance_dict.get("networks",{}).get(sce_net["name"],{})
@@ -1922,9 +2060,11 @@ def create_instance(mydb, tenant_id, instance_dict):
                 if site.get("datacenter"):
                     vim = myvims[ site["datacenter"] ]
                     datacenter_id = site["datacenter"]
+                    myvim_thread_id = myvim_threads_id[ site["datacenter"] ]
                 else:
                     vim = myvims[ default_datacenter_id ]
                     datacenter_id = default_datacenter_id
+                    myvim_thread_id = myvim_threads_id[default_datacenter_id]
                 net_type = sce_net['type']
                 lookfor_filter = {'admin_state_up': True, 'status': 'ACTIVE'} #'shared': True
                 if sce_net["external"]:
@@ -1982,48 +2122,60 @@ def create_instance(mydb, tenant_id, instance_dict):
                         create_network = False
                 if create_network:
                     #if network is not external
-                    network_id = vim.new_network(net_vim_name, net_type, sce_net.get('ip_profile',None))
-                    sce_net["vim_id_sites"][datacenter_id] = network_id
-                    auxNetDict['scenario'][sce_net['uuid']][datacenter_id] = network_id
-                    rollbackList.append({'what':'network', 'where':'vim', 'vim_id':datacenter_id, 'uuid':network_id})
+                    task = new_task("new-net", (net_vim_name, net_type, sce_net.get('ip_profile',None)))
+                    task_id = task["id"]
+                    instance_tasks[task_id] = task
+                    tasks_to_launch[myvim_thread_id].append(task)
+                    #network_id = vim.new_network(net_vim_name, net_type, sce_net.get('ip_profile',None))
+                    sce_net["vim_id_sites"][datacenter_id] = task_id
+                    auxNetDict['scenario'][sce_net['uuid']][datacenter_id] = task_id
+                    rollbackList.append({'what':'network', 'where':'vim', 'vim_id':datacenter_id, 'uuid':task_id})
                     sce_net["created"] = True
 
-    #2. Creating new nets (vnf internal nets) in the VIM"
+        # 2. Creating new nets (vnf internal nets) in the VIM"
         #For each vnf net, we create it and we add it to instanceNetlist.
         for sce_vnf in scenarioDict['vnfs']:
             for net in sce_vnf['nets']:
                 if sce_vnf.get("datacenter"):
                     vim = myvims[ sce_vnf["datacenter"] ]
                     datacenter_id = sce_vnf["datacenter"]
+                    myvim_thread_id = myvim_threads_id[ sce_vnf["datacenter"]]
                 else:
                     vim = myvims[ default_datacenter_id ]
                     datacenter_id = default_datacenter_id
+                    myvim_thread_id = myvim_threads_id[default_datacenter_id]
                 descriptor_net =  instance_dict.get("vnfs",{}).get(sce_vnf["name"],{})
                 net_name = descriptor_net.get("name")
                 if not net_name:
                     net_name = "%s.%s" %(instance_name, net["name"])
                     net_name = net_name[:255]     #limit length
                 net_type = net['type']
-                network_id = vim.new_network(net_name, net_type, net.get('ip_profile',None))
-                net['vim_id'] = network_id
+                task = new_task("new-net", (net_name, net_type, net.get('ip_profile',None)))
+                task_id = task["id"]
+                instance_tasks[task_id] = task
+                tasks_to_launch[myvim_thread_id].append(task)
+                # network_id = vim.new_network(net_name, net_type, net.get('ip_profile',None))
+                net['vim_id'] = task_id
                 if sce_vnf['uuid'] not in auxNetDict:
                     auxNetDict[sce_vnf['uuid']] = {}
-                auxNetDict[sce_vnf['uuid']][net['uuid']] = network_id
-                rollbackList.append({'what':'network','where':'vim','vim_id':datacenter_id,'uuid':network_id})
+                auxNetDict[sce_vnf['uuid']][net['uuid']] = task_id
+                rollbackList.append({'what':'network','where':'vim','vim_id':datacenter_id,'uuid':task_id})
                 net["created"] = True
 
 
         #print "auxNetDict:"
         #print yaml.safe_dump(auxNetDict, indent=4, default_flow_style=False)
 
-    #3. Creating new vm instances in the VIM
+        # 3. Creating new vm instances in the VIM
         #myvim.new_vminstance(self,vimURI,tenant_id,name,description,image_id,flavor_id,net_dict)
         for sce_vnf in scenarioDict['vnfs']:
             if sce_vnf.get("datacenter"):
                 vim = myvims[ sce_vnf["datacenter"] ]
+                myvim_thread_id = myvim_threads_id[ sce_vnf["datacenter"] ]
                 datacenter_id = sce_vnf["datacenter"]
             else:
                 vim = myvims[ default_datacenter_id ]
+                myvim_thread_id = myvim_threads_id[ default_datacenter_id ]
                 datacenter_id = default_datacenter_id
             sce_vnf["datacenter_id"] =  datacenter_id
             i = 0
@@ -2046,9 +2198,6 @@ def create_instance(mydb, tenant_id, instance_dict):
                     flavor_dict['extended']= yaml.load(flavor_dict['extended'])
                 flavor_id = create_or_use_flavor(mydb, {datacenter_id: vim}, flavor_dict, rollbackList, True)
 
-
-
-
                 #Obtain information for additional disks
                 extended_flavor_dict = mydb.get_rows(FROM='datacenters_flavors', SELECT=('extended',), WHERE={'vim_id': flavor_id})
                 if not extended_flavor_dict:
@@ -2063,14 +2212,11 @@ def create_instance(mydb, tenant_id, instance_dict):
                     if 'disks' in extended_flavor_dict_yaml:
                         myVMDict['disks'] = extended_flavor_dict_yaml['disks']
 
-
-
-
                 vm['vim_flavor_id'] = flavor_id
-
                 myVMDict['imageRef'] = vm['vim_image_id']
                 myVMDict['flavorRef'] = vm['vim_flavor_id']
                 myVMDict['networks'] = []
+                task_depends = {}
                 #TODO ALF. connect_mgmt_interfaces. Connect management interfaces if this is true
                 for iface in vm['interfaces']:
                     netDict = {}
@@ -2121,6 +2267,8 @@ def create_instance(mydb, tenant_id, instance_dict):
                                 break
                     else:
                         netDict['net_id'] = auxNetDict[ sce_vnf['uuid'] ][ iface['net_id'] ]
+                    if netDict.get('net_id') and is_task_id(netDict['net_id']):
+                        task_depends[netDict['net_id']] = instance_tasks[netDict['net_id']]
                     #skip bridge ifaces not connected to any net
                     #if 'net_id' not in netDict or netDict['net_id']==None:
                     #    continue
@@ -2134,10 +2282,12 @@ def create_instance(mydb, tenant_id, instance_dict):
                     cloud_config_vm = unify_cloud_config(vm["boot_data"], cloud_config)
                 else:
                     cloud_config_vm = cloud_config
-                vm_id = vim.new_vminstance(myVMDict['name'],myVMDict['description'],myVMDict.get('start', None),
-                        myVMDict['imageRef'],myVMDict['flavorRef'],myVMDict['networks'], cloud_config = cloud_config_vm,
-                        disk_list = myVMDict['disks'])
-
+                task = new_task("new-vm", (myVMDict['name'], myVMDict['description'], myVMDict.get('start', None),
+                                           myVMDict['imageRef'], myVMDict['flavorRef'], myVMDict['networks'],
+                                           cloud_config_vm, myVMDict['disks']), depends=task_depends)
+                instance_tasks[task["id"]] = task
+                tasks_to_launch[myvim_thread_id].append(task)
+                vm_id = task["id"]
                 vm['vim_id'] = vm_id
                 rollbackList.append({'what':'vm','where':'vim','vim_id':datacenter_id,'uuid':vm_id})
                 #put interface uuid back to scenario[vnfs][vms[[interfaces]
@@ -2147,10 +2297,24 @@ def create_instance(mydb, tenant_id, instance_dict):
                             if net["name"]==iface["internal_name"]:
                                 iface["vim_id"]=net["vim_id"]
                                 break
-        scenarioDict["datacenter2tenant"] = datacenter2tenant
+        scenarioDict["datacenter2tenant"] = myvim_threads_id
         logger.debug("create_instance Deployment done scenarioDict: %s",
                     yaml.safe_dump(scenarioDict, indent=4, default_flow_style=False) )
         instance_id = mydb.new_instance_scenario_as_a_whole(tenant_id,instance_name, instance_description, scenarioDict)
+        for myvim_thread_id,task_list in tasks_to_launch.items():
+            for task in task_list:
+                vim_threads["running"][myvim_thread_id].insert_task(task)
+
+        global_instance_tasks[instance_id] = instance_tasks
+        # Update database with those ended instance_tasks
+        # for task in instance_tasks.values():
+        #     if task["status"] == "ok":
+        #         if task["name"] == "new-vm":
+        #             mydb.update_rows("instance_vms", UPDATE={"vim_vm_id": task["result"]},
+        #                             WHERE={"vim_vm_id": task["id"]})
+        #         elif task["name"] == "new-net":
+        #             mydb.update_rows("instance_nets", UPDATE={"vim_net_id": task["result"]},
+        #                              WHERE={"vim_net_id": task["id"]})
         return mydb.get_instance_scenario(instance_id)
     except (NfvoException, vimconn.vimconnException,db_base_Exception)  as e:
         message = rollback(mydb, myvims, rollbackList)
@@ -2164,6 +2328,7 @@ def create_instance(mydb, tenant_id, instance_dict):
         #logger.error("create_instance: %s", error_text)
         raise NfvoException(error_text, e.http_code)
 
+
 def delete_instance(mydb, tenant_id, instance_id):
     #print "Checking that the instance_id exists and getting the instance dictionary"
     instanceDict = mydb.get_instance_scenario(instance_id, tenant_id)
@@ -2176,13 +2341,20 @@ def delete_instance(mydb, tenant_id, instance_id):
 
     #2. delete from VIM
     error_msg = ""
-    myvims={}
+    myvims = {}
+    myvim_threads = {}
 
     #2.1 deleting VMs
     #vm_fail_list=[]
     for sce_vnf in instanceDict['vnfs']:
         datacenter_key = (sce_vnf["datacenter_id"], sce_vnf["datacenter_tenant_id"])
         if datacenter_key not in myvims:
+            try:
+                _,myvim_thread = get_vim_thread(mydb, tenant_id, sce_vnf["datacenter_id"], sce_vnf["datacenter_tenant_id"])
+            except NfvoException as e:
+                logger.error(str(e))
+                myvim_thread = None
+            myvim_threads[datacenter_key] = myvim_thread
             vims = get_vim(mydb, tenant_id, datacenter_id=sce_vnf["datacenter_id"],
                        datacenter_tenant_id=sce_vnf["datacenter_tenant_id"])
             if len(vims) == 0:
@@ -2192,12 +2364,32 @@ def delete_instance(mydb, tenant_id, instance_id):
             else:
                 myvims[datacenter_key] = vims.values()[0]
         myvim = myvims[datacenter_key]
+        myvim_thread = myvim_threads[datacenter_key]
         for vm in sce_vnf['vms']:
             if not myvim:
                 error_msg += "\n    VM id={} cannot be deleted because datacenter={} not found".format(vm['vim_vm_id'], sce_vnf["datacenter_id"])
                 continue
             try:
-                myvim.delete_vminstance(vm['vim_vm_id'])
+                task=None
+                if is_task_id(vm['vim_vm_id']):
+                    task_id = vm['vim_vm_id']
+                    old_task = global_instance_tasks[instance_id].get(task_id)
+                    if not old_task:
+                        error_msg += "\n    VM was scheduled for create, but task {} is not found".format(task_id)
+                        continue
+                    with task_lock:
+                        if old_task["status"] == "enqueued":
+                            old_task["status"] = "deleted"
+                        elif old_task["status"] == "error":
+                            continue
+                        elif old_task["status"] == "processing":
+                            task = new_task("del-vm", (task_id, vm["interfaces"]), depends={task_id: old_task})
+                        else: #ok
+                            task = new_task("del-vm", (old_task["result"], vm["interfaces"]))
+                else:
+                    task = new_task("del-vm", (vm['vim_vm_id'], vm["interfaces"]) )
+                if task:
+                    myvim_thread.insert_task(task)
             except vimconn.vimconnNotFoundException as e:
                 error_msg+="\n    VM VIM_id={} not found at datacenter={}".format(vm['vim_vm_id'], sce_vnf["datacenter_id"])
                 logger.warn("VM instance '%s'uuid '%s', VIM id '%s', from VNF_id '%s' not found",
@@ -2214,6 +2406,12 @@ def delete_instance(mydb, tenant_id, instance_id):
             continue #skip not created nets
         datacenter_key = (net["datacenter_id"], net["datacenter_tenant_id"])
         if datacenter_key not in myvims:
+            try:
+                _,myvim_thread = get_vim_thread(mydb, tenant_id, sce_vnf["datacenter_id"], sce_vnf["datacenter_tenant_id"])
+            except NfvoException as e:
+                logger.error(str(e))
+                myvim_thread = None
+            myvim_threads[datacenter_key] = myvim_thread
             vims = get_vim(mydb, tenant_id, datacenter_id=net["datacenter_id"],
                            datacenter_tenant_id=net["datacenter_tenant_id"])
             if len(vims) == 0:
@@ -2222,189 +2420,213 @@ def delete_instance(mydb, tenant_id, instance_id):
             else:
                 myvims[datacenter_key] = vims.values()[0]
         myvim = myvims[datacenter_key]
+        myvim_thread = myvim_threads[datacenter_key]
 
         if not myvim:
             error_msg += "\n    Net VIM_id={} cannot be deleted because datacenter={} not found".format(net['vim_net_id'], net["datacenter_id"])
             continue
         try:
-            myvim.delete_network(net['vim_net_id'])
+            task = None
+            if is_task_id(net['vim_net_id']):
+                task_id = net['vim_net_id']
+                old_task = global_instance_tasks[instance_id].get(task_id)
+                if not old_task:
+                    error_msg += "\n    NET was scheduled for create, but task {} is not found".format(task_id)
+                    continue
+                with task_lock:
+                    if old_task["status"] == "enqueued":
+                        old_task["status"] = "deleted"
+                    elif old_task["status"] == "error":
+                        continue
+                    elif old_task["status"] == "processing":
+                        task = new_task("del-net", task_id, depends={task_id: old_task})
+                    else:  # ok
+                        task = new_task("del-net", old_task["result"])
+            else:
+                task = new_task("del-net", (net['vim_net_id'], net['sdn_net_id']))
+            if task:
+                myvim_thread.insert_task(task)
         except vimconn.vimconnNotFoundException as e:
-            error_msg+="\n    NET VIM_id={} not found at datacenter={}".format(net['vim_net_id'], net["datacenter_id"])
+            error_msg += "\n    NET VIM_id={} not found at datacenter={}".format(net['vim_net_id'], net["datacenter_id"])
             logger.warn("NET '%s', VIM_id '%s', from VNF_net_id '%s' not found",
-                net['uuid'], net['vim_net_id'], str(net['vnf_net_id']))
+                        net['uuid'], net['vim_net_id'], str(net['vnf_net_id']))
         except vimconn.vimconnException as e:
-            error_msg+="\n    NET VIM_id={} at datacenter={} Error: {} {}".format(net['vim_net_id'], net["datacenter_id"], e.http_code, str(e))
+            error_msg += "\n    NET VIM_id={} at datacenter={} Error: {} {}".format(net['vim_net_id'],
+                                                                                    net["datacenter_id"],
+                                                                                    e.http_code, str(e))
             logger.error("Error %d deleting NET '%s', VIM_id '%s', from VNF_net_id '%s': %s",
-                e.http_code, net['uuid'], net['vim_net_id'], str(net['vnf_net_id']), str(e))
-    if len(error_msg)>0:
+                         e.http_code, net['uuid'], net['vim_net_id'], str(net['vnf_net_id']), str(e))
+    if len(error_msg) > 0:
         return 'instance ' + message + ' deleted but some elements could not be deleted, or already deleted (error: 404) from VIM: ' + error_msg
     else:
         return 'instance ' + message + ' deleted'
 
+
 def refresh_instance(mydb, nfvo_tenant, instanceDict, datacenter=None, vim_tenant=None):
     '''Refreshes a scenario instance. It modifies instanceDict'''
     '''Returns:
          - result: <0 if there is any unexpected error, n>=0 if no errors where n is the number of vms and nets that couldn't be updated in the database
          - error_msg
     '''
-    # Assumption: nfvo_tenant and instance_id were checked before entering into this function
-    #print "nfvo.refresh_instance begins"
-    #print json.dumps(instanceDict, indent=4)
-
-    #print "Getting the VIM URL and the VIM tenant_id"
-    myvims={}
-
-    # 1. Getting VIM vm and net list
-    vms_updated = [] #List of VM instance uuids in openmano that were updated
-    vms_notupdated=[]
-    vm_list = {}
-    for sce_vnf in instanceDict['vnfs']:
-        datacenter_key = (sce_vnf["datacenter_id"], sce_vnf["datacenter_tenant_id"])
-        if datacenter_key not in vm_list:
-            vm_list[datacenter_key] = []
-        if datacenter_key not in myvims:
-            vims = get_vim(mydb, nfvo_tenant, datacenter_id=sce_vnf["datacenter_id"],
-                           datacenter_tenant_id=sce_vnf["datacenter_tenant_id"])
-            if len(vims) == 0:
-                logger.error("datacenter '{}' with datacenter_tenant_id '{}' not found".format(sce_vnf["datacenter_id"], sce_vnf["datacenter_tenant_id"]))
-                myvims[datacenter_key] = None
-            else:
-                myvims[datacenter_key] = vims.values()[0]
-        for vm in sce_vnf['vms']:
-            vm_list[datacenter_key].append(vm['vim_vm_id'])
-            vms_notupdated.append(vm["uuid"])
-
-    nets_updated = [] #List of VM instance uuids in openmano that were updated
-    nets_notupdated=[]
-    net_list = {}
-    for net in instanceDict['nets']:
-        datacenter_key = (net["datacenter_id"], net["datacenter_tenant_id"])
-        if datacenter_key not in net_list:
-            net_list[datacenter_key] = []
-        if datacenter_key not in myvims:
-            vims = get_vim(mydb, nfvo_tenant, datacenter_id=net["datacenter_id"],
-                           datacenter_tenant_id=net["datacenter_tenant_id"])
-            if len(vims) == 0:
-                logger.error("datacenter '{}' with datacenter_tenant_id '{}' not found".format(net["datacenter_id"], net["datacenter_tenant_id"]))
-                myvims[datacenter_key] = None
-            else:
-                myvims[datacenter_key] = vims.values()[0]
-
-        net_list[datacenter_key].append(net['vim_net_id'])
-        nets_notupdated.append(net["uuid"])
-
-    # 1. Getting the status of all VMs
-    vm_dict={}
-    for datacenter_key in myvims:
-        if not vm_list.get(datacenter_key):
-            continue
-        failed = True
-        failed_message=""
-        if not myvims[datacenter_key]:
-            failed_message = "datacenter '{}' with datacenter_tenant_id '{}' not found".format(net["datacenter_id"], net["datacenter_tenant_id"])
-        else:
-            try:
-                vm_dict.update(myvims[datacenter_key].refresh_vms_status(vm_list[datacenter_key]) )
-                failed = False
-            except vimconn.vimconnException as e:
-                logger.error("VIM exception %s %s", type(e).__name__, str(e))
-                failed_message = str(e)
-        if failed:
-            for vm in vm_list[datacenter_key]:
-                vm_dict[vm] = {'status': "VIM_ERROR", 'error_msg': failed_message}
-
-    # 2. Update the status of VMs in the instanceDict, while collects the VMs whose status changed
-    for sce_vnf in instanceDict['vnfs']:
-        for vm in sce_vnf['vms']:
-            vm_id = vm['vim_vm_id']
-            interfaces = vm_dict[vm_id].pop('interfaces', [])
-            #2.0 look if contain manamgement interface, and if not change status from ACTIVE:NoMgmtIP to ACTIVE
-            has_mgmt_iface = False
-            for iface in vm["interfaces"]:
-                if iface["type"]=="mgmt":
-                    has_mgmt_iface = True
-            if vm_dict[vm_id]['status'] == "ACTIVE:NoMgmtIP" and not has_mgmt_iface:
-                vm_dict[vm_id]['status'] = "ACTIVE"
-            if vm_dict[vm_id].get('error_msg') and len(vm_dict[vm_id]['error_msg']) >= 1024:
-                vm_dict[vm_id]['error_msg'] = vm_dict[vm_id]['error_msg'][:516] + " ... " + vm_dict[vm_id]['error_msg'][-500:]
-            if vm['status'] != vm_dict[vm_id]['status'] or vm.get('error_msg')!=vm_dict[vm_id].get('error_msg') or vm.get('vim_info')!=vm_dict[vm_id].get('vim_info'):
-                vm['status']    = vm_dict[vm_id]['status']
-                vm['error_msg'] = vm_dict[vm_id].get('error_msg')
-                vm['vim_info']  = vm_dict[vm_id].get('vim_info')
-                # 2.1. Update in openmano DB the VMs whose status changed
-                try:
-                    updates = mydb.update_rows('instance_vms', UPDATE=vm_dict[vm_id], WHERE={'uuid':vm["uuid"]})
-                    vms_notupdated.remove(vm["uuid"])
-                    if updates>0:
-                        vms_updated.append(vm["uuid"])
-                except db_base_Exception as e:
-                    logger.error("nfvo.refresh_instance error database update: %s", str(e))
-            # 2.2. Update in openmano DB the interface VMs
-            for interface in interfaces:
-                #translate from vim_net_id to instance_net_id
-                network_id_list=[]
-                for net in instanceDict['nets']:
-                    if net["vim_net_id"] == interface["vim_net_id"]:
-                        network_id_list.append(net["uuid"])
-                if not network_id_list:
-                    continue
-                del interface["vim_net_id"]
-                try:
-                    for network_id in network_id_list:
-                        mydb.update_rows('instance_interfaces', UPDATE=interface, WHERE={'instance_vm_id':vm["uuid"], "instance_net_id":network_id})
-                except db_base_Exception as e:
-                    logger.error( "nfvo.refresh_instance error with vm=%s, interface_net_id=%s", vm["uuid"], network_id)
-
-    # 3. Getting the status of all nets
-    net_dict = {}
-    for datacenter_key in myvims:
-        if not net_list.get(datacenter_key):
-            continue
-        failed = True
-        failed_message = ""
-        if not myvims[datacenter_key]:
-            failed_message = "datacenter '{}' with datacenter_tenant_id '{}' not found".format(net["datacenter_id"], net["datacenter_tenant_id"])
-        else:
-            try:
-                net_dict.update(myvims[datacenter_key].refresh_nets_status(net_list[datacenter_key]) )
-                failed = False
-            except vimconn.vimconnException as e:
-                logger.error("VIM exception %s %s", type(e).__name__, str(e))
-                failed_message = str(e)
-        if failed:
-            for net in net_list[datacenter_key]:
-                net_dict[net] = {'status': "VIM_ERROR", 'error_msg': failed_message}
-
-    # 4. Update the status of nets in the instanceDict, while collects the nets whose status changed
-    # TODO: update nets inside a vnf
-    for net in instanceDict['nets']:
-        net_id = net['vim_net_id']
-        if net_dict[net_id].get('error_msg') and len(net_dict[net_id]['error_msg']) >= 1024:
-            net_dict[net_id]['error_msg'] = net_dict[net_id]['error_msg'][:516] + " ... " + net_dict[vm_id]['error_msg'][-500:]
-        if net['status'] != net_dict[net_id]['status'] or net.get('error_msg')!=net_dict[net_id].get('error_msg') or net.get('vim_info')!=net_dict[net_id].get('vim_info'):
-            net['status']    = net_dict[net_id]['status']
-            net['error_msg'] = net_dict[net_id].get('error_msg')
-            net['vim_info']  = net_dict[net_id].get('vim_info')
-            # 5.1. Update in openmano DB the nets whose status changed
-            try:
-                updated = mydb.update_rows('instance_nets', UPDATE=net_dict[net_id], WHERE={'uuid':net["uuid"]})
-                nets_notupdated.remove(net["uuid"])
-                if updated>0:
-                    nets_updated.append(net["uuid"])
-            except db_base_Exception as e:
-                logger.error("nfvo.refresh_instance error database update: %s", str(e))
-
-    # Returns appropriate output
-    #print "nfvo.refresh_instance finishes"
-    logger.debug("VMs updated in the database: %s; nets updated in the database %s; VMs not updated: %s; nets not updated: %s",
-                str(vms_updated), str(nets_updated), str(vms_notupdated), str(nets_notupdated))
+    # Assumption: nfvo_tenant and instance_id were checked before entering into this function
+    # #print "nfvo.refresh_instance begins"
+    # #print json.dumps(instanceDict, indent=4)
+    #
+    # #print "Getting the VIM URL and the VIM tenant_id"
+    myvims={}
+    #
+    # 1. Getting VIM vm and net list
+    vms_updated = [] #List of VM instance uuids in openmano that were updated
+    vms_notupdated=[]
+    vm_list = {}
+    for sce_vnf in instanceDict['vnfs']:
+        datacenter_key = (sce_vnf["datacenter_id"], sce_vnf["datacenter_tenant_id"])
+        if datacenter_key not in vm_list:
+            vm_list[datacenter_key] = []
+        if datacenter_key not in myvims:
+            vims = get_vim(mydb, nfvo_tenant, datacenter_id=sce_vnf["datacenter_id"],
+                           datacenter_tenant_id=sce_vnf["datacenter_tenant_id"])
+            if len(vims) == 0:
+                logger.error("datacenter '{}' with datacenter_tenant_id '{}' not found".format(sce_vnf["datacenter_id"], sce_vnf["datacenter_tenant_id"]))
+                myvims[datacenter_key] = None
+            else:
+                myvims[datacenter_key] = vims.values()[0]
+        for vm in sce_vnf['vms']:
+            vm_list[datacenter_key].append(vm['vim_vm_id'])
+            vms_notupdated.append(vm["uuid"])
+    #
+    nets_updated = [] #List of VM instance uuids in openmano that were updated
+    nets_notupdated=[]
+    net_list = {}
+    for net in instanceDict['nets']:
+        datacenter_key = (net["datacenter_id"], net["datacenter_tenant_id"])
+        if datacenter_key not in net_list:
+            net_list[datacenter_key] = []
+        if datacenter_key not in myvims:
+            vims = get_vim(mydb, nfvo_tenant, datacenter_id=net["datacenter_id"],
+                           datacenter_tenant_id=net["datacenter_tenant_id"])
+            if len(vims) == 0:
+                logger.error("datacenter '{}' with datacenter_tenant_id '{}' not found".format(net["datacenter_id"], net["datacenter_tenant_id"]))
+                myvims[datacenter_key] = None
+            else:
+                myvims[datacenter_key] = vims.values()[0]
+    #
+        net_list[datacenter_key].append(net['vim_net_id'])
+        nets_notupdated.append(net["uuid"])
+    #
+    # 1. Getting the status of all VMs
+    vm_dict={}
+    for datacenter_key in myvims:
+        if not vm_list.get(datacenter_key):
+            continue
+        failed = True
+        failed_message=""
+        if not myvims[datacenter_key]:
+            failed_message = "datacenter '{}' with datacenter_tenant_id '{}' not found".format(net["datacenter_id"], net["datacenter_tenant_id"])
+        else:
+            try:
+                vm_dict.update(myvims[datacenter_key].refresh_vms_status(vm_list[datacenter_key]) )
+                failed = False
+            except vimconn.vimconnException as e:
+                logger.error("VIM exception %s %s", type(e).__name__, str(e))
+                failed_message = str(e)
+        if failed:
+            for vm in vm_list[datacenter_key]:
+                vm_dict[vm] = {'status': "VIM_ERROR", 'error_msg': failed_message}
+    #
+    # 2. Update the status of VMs in the instanceDict, while collects the VMs whose status changed
+    for sce_vnf in instanceDict['vnfs']:
+        for vm in sce_vnf['vms']:
+            vm_id = vm['vim_vm_id']
+            interfaces = vm_dict[vm_id].pop('interfaces', [])
+            #2.0 look if contain manamgement interface, and if not change status from ACTIVE:NoMgmtIP to ACTIVE
+            has_mgmt_iface = False
+            for iface in vm["interfaces"]:
+                if iface["type"]=="mgmt":
+                    has_mgmt_iface = True
+            if vm_dict[vm_id]['status'] == "ACTIVE:NoMgmtIP" and not has_mgmt_iface:
+                vm_dict[vm_id]['status'] = "ACTIVE"
+            if vm_dict[vm_id].get('error_msg') and len(vm_dict[vm_id]['error_msg']) >= 1024:
+                vm_dict[vm_id]['error_msg'] = vm_dict[vm_id]['error_msg'][:516] + " ... " + vm_dict[vm_id]['error_msg'][-500:]
+            if vm['status'] != vm_dict[vm_id]['status'] or vm.get('error_msg')!=vm_dict[vm_id].get('error_msg') or vm.get('vim_info')!=vm_dict[vm_id].get('vim_info'):
+                vm['status']    = vm_dict[vm_id]['status']
+                vm['error_msg'] = vm_dict[vm_id].get('error_msg')
+                vm['vim_info']  = vm_dict[vm_id].get('vim_info')
+                # 2.1. Update in openmano DB the VMs whose status changed
+                try:
+                    updates = mydb.update_rows('instance_vms', UPDATE=vm_dict[vm_id], WHERE={'uuid':vm["uuid"]})
+                    vms_notupdated.remove(vm["uuid"])
+                    if updates>0:
+                        vms_updated.append(vm["uuid"])
+                except db_base_Exception as e:
+                    logger.error("nfvo.refresh_instance error database update: %s", str(e))
+            # 2.2. Update in openmano DB the interface VMs
+            for interface in interfaces:
+                #translate from vim_net_id to instance_net_id
+                network_id_list=[]
+                for net in instanceDict['nets']:
+                    if net["vim_net_id"] == interface["vim_net_id"]:
+                        network_id_list.append(net["uuid"])
+                if not network_id_list:
+                    continue
+                del interface["vim_net_id"]
+                try:
+                    for network_id in network_id_list:
+                        mydb.update_rows('instance_interfaces', UPDATE=interface, WHERE={'instance_vm_id':vm["uuid"], "instance_net_id":network_id})
+                except db_base_Exception as e:
+                    logger.error( "nfvo.refresh_instance error with vm=%s, interface_net_id=%s", vm["uuid"], network_id)
+    #
+    # 3. Getting the status of all nets
+    net_dict = {}
+    for datacenter_key in myvims:
+        if not net_list.get(datacenter_key):
+            continue
+        failed = True
+        failed_message = ""
+        if not myvims[datacenter_key]:
+            failed_message = "datacenter '{}' with datacenter_tenant_id '{}' not found".format(net["datacenter_id"], net["datacenter_tenant_id"])
+        else:
+            try:
+                net_dict.update(myvims[datacenter_key].refresh_nets_status(net_list[datacenter_key]) )
+                failed = False
+            except vimconn.vimconnException as e:
+                logger.error("VIM exception %s %s", type(e).__name__, str(e))
+                failed_message = str(e)
+        if failed:
+            for net in net_list[datacenter_key]:
+                net_dict[net] = {'status': "VIM_ERROR", 'error_msg': failed_message}
+    #
+    # 4. Update the status of nets in the instanceDict, while collects the nets whose status changed
+    # TODO: update nets inside a vnf
+    for net in instanceDict['nets']:
+        net_id = net['vim_net_id']
+        if net_dict[net_id].get('error_msg') and len(net_dict[net_id]['error_msg']) >= 1024:
+            net_dict[net_id]['error_msg'] = net_dict[net_id]['error_msg'][:516] + " ... " + net_dict[vm_id]['error_msg'][-500:]
+        if net['status'] != net_dict[net_id]['status'] or net.get('error_msg')!=net_dict[net_id].get('error_msg') or net.get('vim_info')!=net_dict[net_id].get('vim_info'):
+            net['status']    = net_dict[net_id]['status']
+            net['error_msg'] = net_dict[net_id].get('error_msg')
+            net['vim_info']  = net_dict[net_id].get('vim_info')
+            # 5.1. Update in openmano DB the nets whose status changed
+            try:
+                updated = mydb.update_rows('instance_nets', UPDATE=net_dict[net_id], WHERE={'uuid':net["uuid"]})
+                nets_notupdated.remove(net["uuid"])
+                if updated>0:
+                    nets_updated.append(net["uuid"])
+            except db_base_Exception as e:
+                logger.error("nfvo.refresh_instance error database update: %s", str(e))
+    #
+    # Returns appropriate output
+    # #print "nfvo.refresh_instance finishes"
+    logger.debug("VMs updated in the database: %s; nets updated in the database %s; VMs not updated: %s; nets not updated: %s",
+                str(vms_updated), str(nets_updated), str(vms_notupdated), str(nets_notupdated))
     instance_id = instanceDict['uuid']
-    if len(vms_notupdated)+len(nets_notupdated)>0:
-        error_msg = "VMs not updated: " + str(vms_notupdated) + "; nets not updated: " + str(nets_notupdated)
-        return len(vms_notupdated)+len(nets_notupdated), 'Scenario instance ' + instance_id + ' refreshed but some elements could not be updated in the database: ' + error_msg
+    if len(vms_notupdated)+len(nets_notupdated)>0:
+        error_msg = "VMs not updated: " + str(vms_notupdated) + "; nets not updated: " + str(nets_notupdated)
+        return len(vms_notupdated)+len(nets_notupdated), 'Scenario instance ' + instance_id + ' refreshed but some elements could not be updated in the database: ' + error_msg
 
     return 0, 'Scenario instance ' + instance_id + ' refreshed.'
 
+
 def instance_action(mydb,nfvo_tenant,instance_id, action_dict):
     #print "Checking that the instance_id exists and getting the instance dictionary"
     instanceDict = mydb.get_instance_scenario(instance_id, nfvo_tenant)
@@ -2477,6 +2699,7 @@ def instance_action(mydb,nfvo_tenant,instance_id, action_dict):
     else:
         return vm_result
 
+
 def create_or_use_console_proxy_thread(console_server, console_port):
     #look for a non-used port
     console_thread_key = console_server + ":" + str(console_port)
@@ -2501,6 +2724,7 @@ def create_or_use_console_proxy_thread(console_server, console_port):
             raise NfvoException(str(e), HTTP_Bad_Request)
     raise NfvoException("Not found any free 'http_console_ports'", HTTP_Conflict)
 
+
 def check_tenant(mydb, tenant_id):
     '''check that tenant exists at database'''
     tenant = mydb.get_rows(FROM='nfvo_tenants', SELECT=('uuid',), WHERE={'uuid': tenant_id})
@@ -2508,10 +2732,12 @@ def check_tenant(mydb, tenant_id):
         raise NfvoException("tenant '{}' not found".format(tenant_id), HTTP_Not_Found)
     return
 
+
 def new_tenant(mydb, tenant_dict):
     tenant_id = mydb.new_row("nfvo_tenants", tenant_dict, add_uuid=True)
     return tenant_id
 
+
 def delete_tenant(mydb, tenant):
     #get nfvo_tenant info
 
@@ -2519,6 +2745,7 @@ def delete_tenant(mydb, tenant):
     mydb.delete_row_by_id("nfvo_tenants", tenant_dict['uuid'])
     return tenant_dict['uuid'] + " " + tenant_dict["name"]
 
+
 def new_datacenter(mydb, datacenter_descriptor):
     if "config" in datacenter_descriptor:
         datacenter_descriptor["config"]=yaml.safe_dump(datacenter_descriptor["config"],default_flow_style=True,width=256)
@@ -2536,6 +2763,7 @@ def new_datacenter(mydb, datacenter_descriptor):
     datacenter_id = mydb.new_row("datacenters", datacenter_descriptor, add_uuid=True)
     return datacenter_id
 
+
 def edit_datacenter(mydb, datacenter_id_name, datacenter_descriptor):
     #obtain data, check that only one exist
     datacenter = mydb.get_table_by_uuid_name('datacenters', datacenter_id_name)
@@ -2552,7 +2780,10 @@ def edit_datacenter(mydb, datacenter_id_name, datacenter_descriptor):
                     if new_config_dict[k]==None:
                         to_delete.append(k)
 
-                config_dict = yaml.load(datacenter["config"])
+                config_text = datacenter.get("config")
+                if not config_text:
+                    config_text = '{}'
+                config_dict = yaml.load(config_text)
                 config_dict.update(new_config_dict)
                 #delete null fields
                 for k in to_delete:
@@ -2563,12 +2794,14 @@ def edit_datacenter(mydb, datacenter_id_name, datacenter_descriptor):
     mydb.update_rows('datacenters', datacenter_descriptor, where)
     return datacenter_id
 
+
 def delete_datacenter(mydb, datacenter):
     #get nfvo_tenant info
     datacenter_dict = mydb.get_table_by_uuid_name('datacenters', datacenter, 'datacenter')
     mydb.delete_row_by_id("datacenters", datacenter_dict['uuid'])
     return datacenter_dict['uuid'] + " " + datacenter_dict['name']
 
+
 def associate_datacenter_to_tenant(mydb, nfvo_tenant, datacenter, vim_tenant_id=None, vim_tenant_name=None, vim_username=None, vim_password=None, config=None):
     #get datacenter info
     datacenter_id, myvim = get_datacenter_by_name_uuid(mydb, None, datacenter)
@@ -2630,9 +2863,46 @@ def associate_datacenter_to_tenant(mydb, nfvo_tenant, datacenter, vim_tenant_id=
     # create thread
     datacenter_id, myvim = get_datacenter_by_name_uuid(mydb, tenant_dict['uuid'], datacenter_id)  # reload data
     thread_name = get_non_used_vim_name(datacenter_name, datacenter_id, tenant_dict['name'], tenant_dict['uuid'])
-    new_thread = vim_thread.vim_thread(myvim, thread_name)
+    new_thread = vim_thread.vim_thread(myvim, task_lock, thread_name, datacenter_name, db=db, db_lock=db_lock, ovim=ovim)
     new_thread.start()
-    vim_threads["running"][datacenter_id + "-" + tenant_dict['uuid']] = new_thread
+    thread_id = datacenter_tenants_dict["uuid"]
+    vim_threads["running"][thread_id] = new_thread
+    return datacenter_id
+
+def edit_datacenter_to_tenant(mydb, nfvo_tenant, datacenter_id, vim_tenant_id=None, vim_tenant_name=None, vim_username=None, vim_password=None, config=None):
+    #Obtain the data of this datacenter_tenant_id
+    vim_data = mydb.get_rows(
+        SELECT=("datacenter_tenants.vim_tenant_name", "datacenter_tenants.vim_tenant_id", "datacenter_tenants.user",
+                "datacenter_tenants.passwd", "datacenter_tenants.config"),
+        FROM="datacenter_tenants JOIN tenants_datacenters ON datacenter_tenants.uuid=tenants_datacenters.datacenter_tenant_id",
+        WHERE={"tenants_datacenters.nfvo_tenant_id": nfvo_tenant,
+               "tenants_datacenters.datacenter_id": datacenter_id})
+
+    logger.debug(str(vim_data))
+    if len(vim_data) < 1:
+        raise NfvoException("Datacenter {} is not attached for tenant {}".format(datacenter_id, nfvo_tenant), HTTP_Conflict)
+
+    v = vim_data[0]
+    if v['config']:
+        v['config'] = yaml.load(v['config'])
+
+    if vim_tenant_id:
+        v['vim_tenant_id'] = vim_tenant_id
+    if vim_tenant_name:
+        v['vim_tenant_name'] = vim_tenant_name
+    if vim_username:
+        v['user'] = vim_username
+    if vim_password:
+        v['passwd'] = vim_password
+    if config:
+        if not v['config']:
+            v['config'] = {}
+        v['config'].update(config)
+
+    logger.debug(str(v))
+    deassociate_datacenter_to_tenant(mydb, nfvo_tenant, datacenter_id, vim_tenant_id=v['vim_tenant_id'])
+    associate_datacenter_to_tenant(mydb, nfvo_tenant, datacenter_id, vim_tenant_id=v['vim_tenant_id'], vim_tenant_name=v['vim_tenant_name'],
+                                   vim_username=v['user'], vim_password=v['passwd'], config=v['config'])
 
     return datacenter_id
 
@@ -2675,12 +2945,13 @@ def deassociate_datacenter_to_tenant(mydb, tenant_id, datacenter, vim_tenant_id=
         except db_base_Exception as e:
             logger.error("Cannot delete datacenter_tenants " + str(e))
             pass  # the error will be caused because dependencies, vim_tenant can not be deleted
-        thread_id = datacenter_id + "-" + tenant_datacenter_item["nfvo_tenant_id"]
+        thread_id = tenant_datacenter_item["datacenter_tenant_id"]
         thread = vim_threads["running"][thread_id]
-        thread.insert_task("exit")
+        thread.insert_task(new_task("exit", None))
         vim_threads["deleting"][thread_id] = thread
     return "datacenter {} detached. {}".format(datacenter_id, warning)
 
+
 def datacenter_action(mydb, tenant_id, datacenter, action_dict):
     #DEPRECATED
     #get datacenter info
@@ -2723,6 +2994,7 @@ def datacenter_action(mydb, tenant_id, datacenter, action_dict):
     else:
         raise NfvoException("Unknown action " + str(action_dict), HTTP_Bad_Request)
 
+
 def datacenter_edit_netmap(mydb, tenant_id, datacenter, netmap, action_dict):
     #get datacenter info
     datacenter_id, _  = get_datacenter_by_name_uuid(mydb, tenant_id, datacenter)
@@ -2732,6 +3004,7 @@ def datacenter_edit_netmap(mydb, tenant_id, datacenter, netmap, action_dict):
                             WHERE={'datacenter_id':datacenter_id, what: netmap})
     return result
 
+
 def datacenter_new_netmap(mydb, tenant_id, datacenter, action_dict=None):
     #get datacenter info
     datacenter_id, myvim  = get_datacenter_by_name_uuid(mydb, tenant_id, datacenter)
@@ -2778,6 +3051,7 @@ def datacenter_new_netmap(mydb, tenant_id, datacenter, action_dict=None):
         net_list.append(net_nfvo)
     return net_list
 
+
 def vim_action_get(mydb, tenant_id, datacenter, item, name):
     #get datacenter info
     datacenter_id, myvim  = get_datacenter_by_name_uuid(mydb, tenant_id, datacenter)
@@ -2809,6 +3083,7 @@ def vim_action_get(mydb, tenant_id, datacenter, item, name):
         print "vim_action Not possible to get_%s_list from VIM: %s " % (item, str(e))
         raise NfvoException("Not possible to get_{}_list from VIM: {}".format(item, str(e)), e.http_code)
 
+
 def vim_action_delete(mydb, tenant_id, datacenter, item, name):
     #get datacenter info
     if tenant_id == "any":
@@ -2842,6 +3117,7 @@ def vim_action_delete(mydb, tenant_id, datacenter, item, name):
 
     return "{} {} {} deleted".format(item[:-1], item_id,item_name)
 
+
 def vim_action_create(mydb, tenant_id, datacenter, item, descriptor):
     #get datacenter info
     logger.debug("vim_action_create descriptor %s", str(descriptor))
@@ -2855,7 +3131,8 @@ def vim_action_create(mydb, tenant_id, datacenter, item, descriptor):
             net_type = net.pop("type", "bridge")
             net_public = net.pop("shared", False)
             net_ipprofile = net.pop("ip_profile", None)
-            content = myvim.new_network(net_name, net_type, net_ipprofile, shared=net_public, **net)
+            net_vlan = net.pop("vlan", None)
+            content = myvim.new_network(net_name, net_type, net_ipprofile, shared=net_public, vlan=net_vlan) #, **net)
         elif item=="tenants":
             tenant = descriptor["tenant"]
             content = myvim.new_tenant(tenant["name"], tenant.get("description"))
@@ -2865,3 +3142,122 @@ def vim_action_create(mydb, tenant_id, datacenter, item, descriptor):
         raise NfvoException("Not possible to create {} at VIM: {}".format(item, str(e)), e.http_code)
 
     return vim_action_get(mydb, tenant_id, datacenter, item, content)
+
+def sdn_controller_create(mydb, tenant_id, sdn_controller):
+    data = ovim.new_of_controller(sdn_controller)
+    logger.debug('New SDN controller created with uuid {}'.format(data))
+    return data
+
+def sdn_controller_update(mydb, tenant_id, controller_id, sdn_controller):
+    data = ovim.edit_of_controller(controller_id, sdn_controller)
+    msg = 'SDN controller {} updated'.format(data)
+    logger.debug(msg)
+    return msg
+
+def sdn_controller_list(mydb, tenant_id, controller_id=None):
+    if controller_id == None:
+        data = ovim.get_of_controllers()
+    else:
+        data = ovim.show_of_controller(controller_id)
+
+    msg = 'SDN controller list:\n {}'.format(data)
+    logger.debug(msg)
+    return data
+
+def sdn_controller_delete(mydb, tenant_id, controller_id):
+    select_ = ('uuid', 'config')
+    datacenters = mydb.get_rows(FROM='datacenters', SELECT=select_)
+    for datacenter in datacenters:
+        if datacenter['config']:
+            config = yaml.load(datacenter['config'])
+            if 'sdn-controller' in config and config['sdn-controller'] == controller_id:
+                raise NfvoException("SDN controller {} is in use by datacenter {}".format(controller_id, datacenter['uuid']), HTTP_Conflict)
+
+    data = ovim.delete_of_controller(controller_id)
+    msg = 'SDN controller {} deleted'.format(data)
+    logger.debug(msg)
+    return msg
+
+def datacenter_sdn_port_mapping_set(mydb, tenant_id, datacenter_id, sdn_port_mapping):
+    controller = mydb.get_rows(FROM="datacenters", SELECT=("config",), WHERE={"uuid":datacenter_id})
+    if len(controller) < 1:
+        raise NfvoException("Datacenter {} not present in the database".format(datacenter_id), HTTP_Not_Found)
+
+    try:
+        sdn_controller_id = yaml.load(controller[0]["config"])["sdn-controller"]
+    except:
+        raise NfvoException("The datacenter {} has not an SDN controller associated".format(datacenter_id), HTTP_Bad_Request)
+
+    sdn_controller = ovim.show_of_controller(sdn_controller_id)
+    switch_dpid = sdn_controller["dpid"]
+
+    maps = list()
+    for compute_node in sdn_port_mapping:
+        #element = {"ofc_id": sdn_controller_id, "region": datacenter_id, "switch_dpid": switch_dpid}
+        element = dict()
+        element["compute_node"] = compute_node["compute_node"]
+        for port in compute_node["ports"]:
+            element["pci"] = port.get("pci")
+            element["switch_port"] = port.get("switch_port")
+            element["switch_mac"] = port.get("switch_mac")
+            if not element["pci"] or not (element["switch_port"] or element["switch_mac"]):
+                raise NfvoException ("The mapping must contain the 'pci' and at least one of the elements 'switch_port'"
+                                     " or 'switch_mac'", HTTP_Bad_Request)
+            maps.append(dict(element))
+
+    return ovim.set_of_port_mapping(maps, ofc_id=sdn_controller_id, switch_dpid=switch_dpid, region=datacenter_id)
+
+def datacenter_sdn_port_mapping_list(mydb, tenant_id, datacenter_id):
+    maps = ovim.get_of_port_mappings(db_filter={"region": datacenter_id})
+
+    result = {
+        "sdn-controller": None,
+        "datacenter-id": datacenter_id,
+        "dpid": None,
+        "ports_mapping": list()
+    }
+
+    datacenter = mydb.get_table_by_uuid_name('datacenters', datacenter_id)
+    if datacenter['config']:
+        config = yaml.load(datacenter['config'])
+        if 'sdn-controller' in config:
+            controller_id = config['sdn-controller']
+            sdn_controller = sdn_controller_list(mydb, tenant_id, controller_id)
+            result["sdn-controller"] = controller_id
+            result["dpid"] = sdn_controller["dpid"]
+
+    if result["sdn-controller"] == None or result["dpid"] == None:
+        raise NfvoException("Not all SDN controller information for datacenter {} could be found: {}".format(datacenter_id, result),
+                            HTTP_Internal_Server_Error)
+
+    if len(maps) == 0:
+        return result
+
+    ports_correspondence_dict = dict()
+    for link in maps:
+        if result["sdn-controller"] != link["ofc_id"]:
+            raise NfvoException("The sdn-controller specified for different port mappings differ", HTTP_Internal_Server_Error)
+        if result["dpid"] != link["switch_dpid"]:
+            raise NfvoException("The dpid specified for different port mappings differ", HTTP_Internal_Server_Error)
+        element = dict()
+        element["pci"] = link["pci"]
+        if link["switch_port"]:
+            element["switch_port"] = link["switch_port"]
+        if link["switch_mac"]:
+            element["switch_mac"] = link["switch_mac"]
+
+        if not link["compute_node"] in ports_correspondence_dict:
+            content = dict()
+            content["compute_node"] = link["compute_node"]
+            content["ports"] = list()
+            ports_correspondence_dict[link["compute_node"]] = content
+
+        ports_correspondence_dict[link["compute_node"]]["ports"].append(element)
+
+    for key in sorted(ports_correspondence_dict):
+        result["ports_mapping"].append(ports_correspondence_dict[key])
+
+    return result
+
+def datacenter_sdn_port_mapping_delete(mydb, tenant_id, datacenter_id):
+    return ovim.clear_of_port_mapping(db_filter={"region":datacenter_id})
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