Changes in vROPs Plugin webservice & install script to use fqdn
[osm/MON.git] / plugins / vRealiseOps / mon_plugin_vrops.py
index a65d01c..309cec9 100644 (file)
 # -*- coding: utf-8 -*-
+
+##
+# Copyright 2016-2017 VMware Inc.
+# This file is part of ETSI OSM
+# 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:  osslegalrouting@vmware.com
+##
+
 """
 Montoring metrics & creating Alarm definations in vROPs
 """
 
 import requests
-import logging as log
+import logging
 from pyvcloud.vcloudair import VCA
 from xml.etree import ElementTree as XmlElementTree
 import traceback
+import time
+import json
+from OpenSSL.crypto import load_certificate, FILETYPE_PEM
+import os
+import datetime
+from socket import getfqdn
 
-OPERATION_MAPPING = {'GE':'GT_EQ', 'LE':'LT_EQ', 'GT':'GT', 'LT':'LT', 'EQ':'EQ'}
-SEVERITY_MAPPING = {'WARNING':'WARNING', 'MINOR':'WARNING', 'MAJOR':"IMMEDIATE", 'CRITICAL':'CRITICAL'}
+from requests.packages.urllib3.exceptions import InsecureRequestWarning
+requests.packages.urllib3.disable_warnings(InsecureRequestWarning)
 
+OPERATION_MAPPING = {'GE':'GT_EQ', 'LE':'LT_EQ', 'GT':'GT', 'LT':'LT', 'EQ':'EQ'}
+severity_mano2vrops = {'WARNING':'WARNING', 'MINOR':'WARNING', 'MAJOR':"IMMEDIATE",\
+                        'CRITICAL':'CRITICAL', 'INDETERMINATE':'UNKNOWN'}
+PERIOD_MSEC = {'HR':3600000,'DAY':86400000,'WEEK':604800000,'MONTH':2678400000,'YEAR':31536000000}
+
+#To Do - Add actual webhook url & certificate
+#SSL_CERTIFICATE_FILE_NAME = 'vROPs_Webservice/SSL_certificate/www.vrops_webservice.com.cert'
+#webhook_url = "https://mano-dev-1:8080/notify/" #for testing
+webhook_url = "https://" + getfqdn() + ":8080/notify/"
+SSL_CERTIFICATE_FILE_NAME = ('vROPs_Webservice/SSL_certificate/' + getfqdn() + ".cert")
+#SSL_CERTIFICATE_FILE_NAME = 'vROPs_Webservice/SSL_certificate/10.172.137.214.cert' #for testing
+
+MODULE_DIR = os.path.dirname(__file__)
+CONFIG_FILE_NAME = 'vrops_config.xml'
+CONFIG_FILE_PATH = os.path.join(MODULE_DIR, CONFIG_FILE_NAME)
+SSL_CERTIFICATE_FILE_PATH = os.path.join(MODULE_DIR, SSL_CERTIFICATE_FILE_NAME)
 
 class MonPlugin():
     """MON Plugin class for vROPs telemetry plugin
-    """ 
-    def __init__(self, access_config={}):
+    """
+    def __init__(self):
         """Constructor of MON plugin
         Params:
-            'access_config': dictionary with VIM access information based on VIM type. 
-            This contains a consolidate version of VIM & monitoring tool config at creation and 
+            'access_config': dictionary with VIM access information based on VIM type.
+            This contains a consolidate version of VIM & monitoring tool config at creation and
             particular VIM config at their attachment.
-            For VIM type: 'vmware', access_config - {'vrops_site':<>, 'vrops_user':<>, 'vrops_password':<>,
-                                                    'vcloud-site':<>,'admin_username':<>,'admin_password':<>,
-                                                    'nsx_manager':<>,'nsx_user':<>,'nsx_password':<>,
-                                                    'vcenter_ip':<>,'vcenter_port':<>,'vcenter_user':<>,'vcenter_password':<>,
-                                                    'vim_tenant_name':<>,'orgname':<>}
+            For VIM type: 'vmware',
+            access_config - {'vrops_site':<>, 'vrops_user':<>, 'vrops_password':<>,
+                            'vcloud-site':<>,'admin_username':<>,'admin_password':<>,
+                            'nsx_manager':<>,'nsx_user':<>,'nsx_password':<>,
+                            'vcenter_ip':<>,'vcenter_port':<>,'vcenter_user':<>,'vcenter_password':<>,
+                            'vim_tenant_name':<>,'orgname':<>}
 
         #To Do
         Returns: Raise an exception if some needed parameter is missing, but it must not do any connectivity
             check against the VIM
         """
+        self.logger = logging.getLogger('PluginReceiver.MonPlugin')
+        self.logger.setLevel(logging.DEBUG)
+
+        access_config = self.get_default_Params('Access_Config')
         self.access_config = access_config
-        self.vrops_site =  access_config['vrops_site']
-        self.vrops_user = access_config['vrops_user']
-        self.vrops_password = access_config['vrops_password']
-        self.vcloud_site = access_config['vcloud_site']
-        self.vcloud_username = access_config['vcloud_username']
-        self.vcloud_password = access_config['vcloud_password']
+        if not bool(access_config):
+            self.logger.error("Access configuration not provided in vROPs Config file")
+            raise KeyError("Access configuration not provided in vROPs Config file")
+
+        try:
+            self.vrops_site =  access_config['vrops_site']
+            self.vrops_user = access_config['vrops_user']
+            self.vrops_password = access_config['vrops_password']
+            self.vcloud_site = access_config['vcloud-site']
+            self.admin_username = access_config['admin_username']
+            self.admin_password = access_config['admin_password']
+            self.tenant_id = access_config['tenant_id']
+        except KeyError as exp:
+            self.logger.error("Check Access configuration in vROPs Config file: {}".format(exp))
+            raise KeyError("Check Access configuration in vROPs Config file: {}".format(exp))
+
 
     def configure_alarm(self, config_dict = {}):
         """Configures or creates a new alarm using the input parameters in config_dict
@@ -48,73 +107,89 @@ class MonPlugin():
         "resource_uuid": Resource UUID for which alarm needs to be configured. in string format
         "Resource type": String resource type: 'VDU' or 'host'
         "Severity": 'WARNING', 'MINOR', 'MAJOR', 'CRITICAL'
-        "metric": Metric key in string format
+        "metric_name": Metric key in string format
         "operation": One of ('GE', 'LE', 'GT', 'LT', 'EQ')
-        "threshold_value": Defines the threshold (up to 2 fraction digits) that, if crossed, will trigger the alarm.
+        "threshold_value": Defines the threshold (up to 2 fraction digits) that,
+                            if crossed, will trigger the alarm.
         "unit": Unit of measurement in string format
         "statistic": AVERAGE, MINIMUM, MAXIMUM, COUNT, SUM
 
         Default parameters for each alarm are read from the plugin specific config file.
         Dict of default parameters is as follows:
-        default_params keys = {'cancel_cycles','wait_cycles','resource_kind','adapter_kind','alarm_type','alarm_subType',impact}
+        default_params keys = {'cancel_cycles','wait_cycles','resource_kind','adapter_kind',
+                               'alarm_type','alarm_subType',impact}
 
         Returns the UUID of created alarm or None
         """
-        alarm_def_uuid = None
+        alarm_def = None
         #1) get alarm & metrics parameters from plugin specific file
-        def_params = self.get_default_Params(config_dict['alarm_name'])
-        metric_key_params = self.get_default_Params(config_dict['metric'])
+        def_a_params = self.get_default_Params(config_dict['alarm_name'])
+        if not def_a_params:
+            self.logger.warn("Alarm not supported: {}".format(config_dict['alarm_name']))
+            return None
+        metric_key_params = self.get_default_Params(config_dict['metric_name'])
+        if not metric_key_params:
+            self.logger.warn("Metric not supported: {}".format(config_dict['metric_name']))
+            return None
         #2) create symptom definition
-        #TO DO - 'metric_key':config_dict['metric'] - mapping from file def_params
-        symptom_params ={'cancel_cycles': (def_params['cancel_period']/300)*def_params['cancel_cycles'],
-                        'wait_cycles': (def_params['period']/300)*def_params['evaluation'],
-                        'resource_kind_key': def_params['resource_kind'],'adapter_kind_key': def_params['adapter_kind'],
-                        'symptom_name':config_dict['alarm_name'],'severity': SEVERITY_MAPPING[config_dict['severity']],
-                        'metric_key':metric_key_params['metric_key'],'operation':OPERATION_MAPPING[config_dict['operation']],
+        vrops_alarm_name = def_a_params['vrops_alarm']+ '-' + config_dict['resource_uuid']
+        symptom_params ={'cancel_cycles': (def_a_params['cancel_period']/300)*def_a_params['cancel_cycles'],
+                        'wait_cycles': (def_a_params['period']/300)*def_a_params['evaluation'],
+                        'resource_kind_key': def_a_params['resource_kind'],
+                        'adapter_kind_key': def_a_params['adapter_kind'],
+                        'symptom_name':vrops_alarm_name,
+                        'severity': severity_mano2vrops[config_dict['severity']],
+                        'metric_key':metric_key_params['metric_key'],
+                        'operation':OPERATION_MAPPING[config_dict['operation']],
                         'threshold_value':config_dict['threshold_value']}
         symptom_uuid = self.create_symptom(symptom_params)
         if symptom_uuid is not None:
-            log.info("Symptom defined: {} with ID: {}".format(symptom_params['symptom_name'],symptom_uuid))
+            self.logger.info("Symptom defined: {} with ID: {}".format(symptom_params['symptom_name'],symptom_uuid))
         else:
-            log.warn("Failed to create Symptom: {}".format(symptom_params['symptom_name']))
+            self.logger.warn("Failed to create Symptom: {}".format(symptom_params['symptom_name']))
             return None
         #3) create alert definition
-        #To Do - Get type & subtypes for all 5 alarms 
-        alarm_params = {'name':config_dict['alarm_name'],
-                        'description':config_dict['description'] if config_dict['description'] is not None else config_dict['alarm_name'],
-                        'adapterKindKey':def_params['adapter_kind'], 'resourceKindKey':def_params['resource_kind'],
+        #To Do - Get type & subtypes for all 5 alarms
+        alarm_params = {'name':vrops_alarm_name,
+                        'description':config_dict['description']\
+                        if config_dict['description'] is not None else config_dict['alarm_name'],
+                        'adapterKindKey':def_a_params['adapter_kind'],
+                        'resourceKindKey':def_a_params['resource_kind'],
                         'waitCycles':1, 'cancelCycles':1,
-                        'type':def_params['alarm_type'], 'subType':def_params['alarm_subType'],
-                        'severity':SEVERITY_MAPPING[config_dict['severity']],
+                        'type':def_a_params['alarm_type'], 'subType':def_a_params['alarm_subType'],
+                        'severity':severity_mano2vrops[config_dict['severity']],
                         'symptomDefinitionId':symptom_uuid,
-                        'impact':def_params['impact']}
+                        'impact':def_a_params['impact']}
 
-        alarm_def_uuid = self.create_alarm_definition(alarm_params)
-        if alarm_def_uuid is None:
-            log.warn("Failed to create Alert: {}".format(alarm_params['name']))
+        alarm_def = self.create_alarm_definition(alarm_params)
+        if alarm_def is None:
+            self.logger.warn("Failed to create Alert: {}".format(alarm_params['name']))
             return None
 
-        log.info("Alarm defined: {} with ID: {}".format(alarm_params['name'],alarm_def_uuid))
+        self.logger.info("Alarm defined: {} with ID: {}".format(alarm_params['name'],alarm_def))
 
         #4) Find vm_moref_id from vApp uuid in vCD
         vm_moref_id = self.get_vm_moref_id(config_dict['resource_uuid'])
         if vm_moref_id is None:
-            log.warn("Failed to find vm morefid for vApp in vCD: {}".format(config_dict['resource_uuid']))
+            self.logger.warn("Failed to find vm morefid for vApp in vCD: {}".format(config_dict['resource_uuid']))
             return None
 
         #5) Based on vm_moref_id, find VM's corresponding resource_id in vROPs to set notification
         resource_id = self.get_vm_resource_id(vm_moref_id)
         if resource_id is None:
-            log.warn("Failed to find resource in vROPs: {}".format(config_dict['resource_uuid']))
+            self.logger.warn("Failed to find resource in vROPs: {}".format(config_dict['resource_uuid']))
             return None
 
         #6) Configure alarm notification for a particular VM using it's resource_id
-        notification_id = self.create_alarm_notification(config_dict['alarm_name'], alarm_def_uuid, resource_id)
+        notification_id = self.create_alarm_notification_rule(vrops_alarm_name, alarm_def, resource_id)
         if notification_id is None:
             return None
         else:
-            log.info("Alarm defination created with notification: {} with ID: {}".format(alarm_params['name'],alarm_def_uuid))
-            return alarm_def_uuid
+            alarm_def_uuid = alarm_def.split('-', 1)[1]
+            self.logger.info("Alarm defination created with notification: {} with ID: {}"\
+                    .format(alarm_params['name'],alarm_def_uuid))
+            #Return alarm defination UUID by removing 'AlertDefinition' from UUID
+            return (alarm_def_uuid)
 
     def get_default_Params(self, metric_alarm_name):
         """
@@ -122,25 +197,31 @@ class MonPlugin():
         Params:
             metric_alarm_name: Name of the alarm, whose congif params to be read from the config file.
         """
-        tree = XmlElementTree.parse('vROPs_default_config.xml')
-        alarms = tree.getroot()
         a_params = {}
+        try:
+            source = open(CONFIG_FILE_PATH, 'r')
+        except IOError as exp:
+            msg = ("Could not read Config file: {}, \nException: {}"\
+                        .format(CONFIG_FILE_PATH, exp))
+            self.logger.error(msg)
+            raise IOError(msg)
+
+        tree = XmlElementTree.parse(source)
+        alarms = tree.getroot()
         for alarm in alarms:
             if alarm.tag == metric_alarm_name:
                 for param in alarm:
-                    if param.tag in ("period", "evaluation", "cancel_period", "alarm_type", "cancel_cycles", "alarm_subType"):
+                    if param.tag in ("period", "evaluation", "cancel_period", "alarm_type",\
+                                    "cancel_cycles", "alarm_subType"):
                         a_params[param.tag] = int(param.text)
                     elif param.tag in ("enabled", "repeat"):
-                        if(param.text == "True" or param.text == "true"):
+                        if(param.text.lower() == "true"):
                             a_params[param.tag] = True
                         else:
                             a_params[param.tag] = False
                     else:
                         a_params[param.tag] = param.text
-
-        if not a_params:
-            log.warn("No such '{}' alarm found!.".format(alarm))
-
+        source.close()
         return a_params
 
 
@@ -165,7 +246,11 @@ class MonPlugin():
             api_url = '/suite-api/api/symptomdefinitions'
             headers = {'Content-Type': 'application/xml'}
             data = """<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
-                        <ops:symptom-definition cancelCycles="{0:s}" waitCycles="{1:s}" resourceKindKey="{2:s}" adapterKindKey="{3:s}" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ops="http://webservice.vmware.com/vRealizeOpsMgr/1.0/">
+                        <ops:symptom-definition cancelCycles="{0:s}" waitCycles="{1:s}"
+                            resourceKindKey="{2:s}" adapterKindKey="{3:s}"
+                            xmlns:xs="http://www.w3.org/2001/XMLSchema"
+                            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+                            xmlns:ops="http://webservice.vmware.com/vRealizeOpsMgr/1.0/">
                             <ops:name>{4:s}</ops:name>
                             <ops:state severity="{5:s}">
                                 <ops:condition xsi:type="ops:htCondition">
@@ -177,9 +262,12 @@ class MonPlugin():
                                     <ops:thresholdType>STATIC</ops:thresholdType>
                                 </ops:condition>
                             </ops:state>
-                        </ops:symptom-definition>""".format(str(symptom_params['cancel_cycles']),str(symptom_params['wait_cycles']),symptom_params['resource_kind_key'],
-                                                            symptom_params['adapter_kind_key'],symptom_params['symptom_name'],symptom_params['severity'],
-                                                            symptom_params['metric_key'],symptom_params['operation'],str(symptom_params['threshold_value']))
+                        </ops:symptom-definition>"""\
+                        .format(str(symptom_params['cancel_cycles']),str(symptom_params['wait_cycles']),
+                                symptom_params['resource_kind_key'], symptom_params['adapter_kind_key'],
+                                symptom_params['symptom_name'],symptom_params['severity'],
+                                symptom_params['metric_key'],symptom_params['operation'],
+                                str(symptom_params['threshold_value']))
 
             resp = requests.post(self.vrops_site + api_url,
                                  auth=(self.vrops_user, self.vrops_password),
@@ -188,7 +276,8 @@ class MonPlugin():
                                  data=data)
 
             if resp.status_code != 201:
-                log.warn("Failed to create Symptom definition: {}, response {}".format(symptom_params['symptom_name'], resp.content))
+                self.logger.warn("Failed to create Symptom definition: {}, response {}"\
+                        .format(symptom_params['symptom_name'], resp.content))
                 return None
 
             symptom_xmlroot = XmlElementTree.fromstring(resp.content)
@@ -198,7 +287,8 @@ class MonPlugin():
             return symptom_id
 
         except Exception as exp:
-            log.warn("Error creating symptom definition : {}\n{}".format(exp, traceback.format_exc()))
+            self.logger.warn("Error creating symptom definition : {}\n{}"\
+            .format(exp, traceback.format_exc()))
 
 
     def create_alarm_definition(self, alarm_params):
@@ -207,12 +297,12 @@ class MonPlugin():
         Params:
             'name': Alarm Name,
             'description':Alarm description,
-            'adapterKindKey': Adapter type in vROPs "VMWARE", 
+            'adapterKindKey': Adapter type in vROPs "VMWARE",
             'resourceKindKey':Resource type in vROPs "VirtualMachine",
-            'waitCycles': No of wait cycles, 
+            'waitCycles': No of wait cycles,
             'cancelCycles': No of cancel cycles,
-            'type': Alarm type: , 
-            'subType': Alarm subtype,
+            'type': Alarm type,
+            'subType': Alarm subtype,
             'severity': Severity in vROPs "CRITICAL",
             'symptomDefinitionId':symptom Definition uuid,
             'impact': impact 'risk'
@@ -226,7 +316,9 @@ class MonPlugin():
             api_url = '/suite-api/api/alertdefinitions'
             headers = {'Content-Type': 'application/xml'}
             data = """<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
-                        <ops:alert-definition xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ops="http://webservice.vmware.com/vRealizeOpsMgr/1.0/">
+                        <ops:alert-definition xmlns:xs="http://www.w3.org/2001/XMLSchema"
+                            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+                            xmlns:ops="http://webservice.vmware.com/vRealizeOpsMgr/1.0/">
                             <ops:name>{0:s}</ops:name>
                             <ops:description>{1:s}</ops:description>
                             <ops:adapterKindKey>{2:s}</ops:adapterKindKey>
@@ -251,9 +343,12 @@ class MonPlugin():
                                     </ops:impact>
                                 </ops:state>
                             </ops:states>
-                        </ops:alert-definition>""".format(alarm_params['name'],alarm_params['description'],alarm_params['adapterKindKey'],
-                                                            alarm_params['resourceKindKey'],str(alarm_params['type']),str(alarm_params['subType']),
-                                                            alarm_params['severity'],alarm_params['symptomDefinitionId'],alarm_params['impact'])
+                        </ops:alert-definition>"""\
+                        .format(alarm_params['name'],alarm_params['description'],
+                                alarm_params['adapterKindKey'],alarm_params['resourceKindKey'],
+                                str(alarm_params['type']),str(alarm_params['subType']),
+                                alarm_params['severity'],alarm_params['symptomDefinitionId'],
+                                alarm_params['impact'])
 
             resp = requests.post(self.vrops_site + api_url,
                                  auth=(self.vrops_user, self.vrops_password),
@@ -262,7 +357,8 @@ class MonPlugin():
                                  data=data)
 
             if resp.status_code != 201:
-                log.warn("Failed to create Alarm definition: {}, response {}".format(alarm_params['name'], resp.content))
+                self.logger.warn("Failed to create Alarm definition: {}, response {}"\
+                        .format(alarm_params['name'], resp.content))
                 return None
 
             alarm_xmlroot = XmlElementTree.fromstring(resp.content)
@@ -273,69 +369,111 @@ class MonPlugin():
             return alarm_uuid
 
         except Exception as exp:
-            log.warn("Error creating alarm definition : {}\n{}".format(exp, traceback.format_exc()))
+            self.logger.warn("Error creating alarm definition : {}\n{}".format(exp, traceback.format_exc()))
 
 
-    def configure_rest_plugin(self, plugin_name, webhook_url, certificate):
+    def configure_rest_plugin(self):
         """
         Creates REST Plug-in for vROPs outbound alerts
 
-        Params:
-        plugin_name: name of REST plugin instance
-        pluginTypeId - RestPlugin
-        Optional configValues 
-        "Url">https://dev14136.service-now.com:8080</ops:configValue> - reqd
-        "Username">admin</ops:configValue>                    - optional
-        "Password">VMware1!</ops:configValue>                - optional
-        "Content-type">application/xml</ops:configValue>    - reqd
-        "Certificate">abcdefgh123456</ops:configValue>        - get n set
-        "ConnectionCount" - 20                                - default
+        Returns Plugin ID
         """
         plugin_id = None
+        plugin_name = 'MON_module_REST_Plugin'
+        plugin_id = self.check_if_plugin_configured(plugin_name)
+
+        #If REST plugin not configured, configure it
+        if plugin_id is not None:
+            return plugin_id
+        else:
+            try:
+                cert_file_string = open(SSL_CERTIFICATE_FILE_PATH, "rb").read()
+            except IOError as exp:
+                msg = ("Could not read SSL certificate file: {}".format(SSL_CERTIFICATE_FILE_PATH))
+                self.logger.error(msg)
+                raise IOError(msg)
+            cert = load_certificate(FILETYPE_PEM, cert_file_string)
+            certificate = cert.digest("sha1")
+            api_url = '/suite-api/api/alertplugins'
+            headers = {'Content-Type': 'application/xml'}
+            data =   """<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+                        <ops:notification-plugin version="0" xmlns:xs="http://www.w3.org/2001/XMLSchema"
+                            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+                            xmlns:ops="http://webservice.vmware.com/vRealizeOpsMgr/1.0/">
+                            <ops:pluginTypeId>RestPlugin</ops:pluginTypeId>
+                            <ops:name>{0:s}</ops:name>
+                            <ops:configValues>
+                                <ops:configValue name="Url">{1:s}</ops:configValue>
+                                <ops:configValue name="Content-type">application/json</ops:configValue>
+                                <ops:configValue name="Certificate">{2:s}</ops:configValue>
+                                <ops:configValue name="ConnectionCount">20</ops:configValue>
+                            </ops:configValues>
+                        </ops:notification-plugin>""".format(plugin_name, webhook_url, certificate)
+
+            resp = requests.post(self.vrops_site + api_url,
+                                 auth=(self.vrops_user, self.vrops_password),
+                                 headers=headers,
+                                 verify = False,
+                                 data=data)
 
+            if resp.status_code is not 201:
+                self.logger.warn("Failed to create REST Plugin: {} for url: {}, \nresponse code: {},"\
+                            "\nresponse content: {}".format(plugin_name, webhook_url,\
+                            resp.status_code, resp.content))
+                return None
+
+            plugin_xmlroot = XmlElementTree.fromstring(resp.content)
+            if plugin_xmlroot is not None:
+                for child in plugin_xmlroot:
+                    if child.tag.split("}")[1] == 'pluginId':
+                        plugin_id = plugin_xmlroot.find('{http://webservice.vmware.com/vRealizeOpsMgr/1.0/}pluginId').text
+
+            if plugin_id is None:
+                self.logger.warn("Failed to get REST Plugin ID for {}, url: {}".format(plugin_name, webhook_url))
+                return None
+            else:
+                self.logger.info("Created REST Plugin: {} with ID : {} for url: {}".format(plugin_name, plugin_id, webhook_url))
+                status = self.enable_rest_plugin(plugin_id, plugin_name)
+                if status is False:
+                    self.logger.warn("Failed to enable created REST Plugin: {} for url: {}".format(plugin_name, webhook_url))
+                    return None
+                else:
+                    self.logger.info("Enabled REST Plugin: {} for url: {}".format(plugin_name, webhook_url))
+                    return plugin_id
+
+    def check_if_plugin_configured(self, plugin_name):
+        """Check if the REST plugin is already created
+        Returns: plugin_id: if already created, None: if needs to be created
+        """
+        plugin_id = None
+        #Find the REST Plugin id details for - MON_module_REST_Plugin
         api_url = '/suite-api/api/alertplugins'
-        headers = {'Content-Type': 'application/xml'}
-        data =   """<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
-                    <ops:notification-plugin version="0" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ops="http://webservice.vmware.com/vRealizeOpsMgr/1.0/">
-                        <ops:pluginTypeId>RestPlugin</ops:pluginTypeId>
-                        <ops:name>{0:s}</ops:name>
-                        <ops:configValues>
-                            <ops:configValue name="Url">{1:s}</ops:configValue>
-                            <ops:configValue name="Content-type">application/xml</ops:configValue>
-                            <ops:configValue name="Certificate">{2:s}</ops:configValue>
-                            <ops:configValue name="ConnectionCount">20</ops:configValue>
-                        </ops:configValues>
-                    </ops:notification-plugin>""".format(plugin_name, webhook_url, certificate)
+        headers = {'Accept': 'application/xml'}
+        namespace = {'params':"http://webservice.vmware.com/vRealizeOpsMgr/1.0/"}
 
-        resp = requests.post(self.vrops_site + api_url,
-                             auth=(self.vrops_user, self.vrops_password),
-                             headers=headers,
-                             verify = False,
-                             data=data)
+        resp = requests.get(self.vrops_site + api_url,
+                            auth=(self.vrops_user, self.vrops_password),
+                            verify = False, headers = headers)
 
-        if resp.status_code is not 201:
-            log.warn("Failed to create REST Plugin: {} for url: {}, \nresponse code: {},\nresponse content: {}"\
-            .format(plugin_name, webhook_url, resp.status_code, resp.content))
-            return None 
+        if resp.status_code is not 200:
+            self.logger.warn("Failed to REST GET Alarm plugin details \nResponse code: {}\nResponse content: {}"\
+            .format(resp.status_code, resp.content))
+            return None
 
-        plugin_xmlroot = XmlElementTree.fromstring(resp.content)
-        if plugin_xmlroot is not None:
-            for child in plugin_xmlroot:
-                if child.tag.split("}")[1] == 'pluginId':
-                    plugin_id = plugin_xmlroot.find('{http://webservice.vmware.com/vRealizeOpsMgr/1.0/}pluginId').text
+        # Look for specific plugin & parse pluginId for 'MON_module_REST_Plugin'
+        xmlroot_resp = XmlElementTree.fromstring(resp.content)
+        for notify_plugin in xmlroot_resp.findall('params:notification-plugin',namespace):
+            if notify_plugin.find('params:name',namespace) is not None and\
+                notify_plugin.find('params:pluginId',namespace) is not None:
+                if notify_plugin.find('params:name',namespace).text == plugin_name:
+                    plugin_id = notify_plugin.find('params:pluginId',namespace).text
 
         if plugin_id is None:
-            log.warn("Failed to get REST Plugin ID for {}, url: {}".format(plugin_name, webhook_url))
+            self.logger.warn("REST plugin {} not found".format('MON_module_REST_Plugin'))
             return None
         else:
-            log.info("Created REST Plugin: {} with ID : {} for url: {}".format(plugin_name, plugin_id, webhook_url))
-            status = self.enable_rest_plugin(plugin_id, plugin_name)
-            if status is False:
-                log.warn("Failed to enable created REST Plugin: {} for url: {}".format(plugin_name, webhook_url))
-                return None
-            else:
-                log.info("Enabled REST Plugin: {} for url: {}".format(plugin_name, webhook_url))
-                return plugin_id
+            self.logger.info("Found REST Plugin: {}".format(plugin_name))
+            return plugin_id
 
 
     def enable_rest_plugin(self, plugin_id, plugin_name):
@@ -346,28 +484,32 @@ class MonPlugin():
         """
 
         if plugin_id is None or plugin_name is None:
-            log.debug("enable_rest_plugin() : Plugin ID or plugin_name not provided for {} plugin".format(plugin_name))
+            self.logger.debug("enable_rest_plugin() : Plugin ID or plugin_name not provided for {} plugin"\
+                        .format(plugin_name))
             return False
 
         try:
             api_url = "/suite-api/api/alertplugins/{}/enable/True".format(plugin_id)
 
-            resp = requests.put(self.vrops_site + api_url, auth=(self.vrops_user, self.vrops_password), verify = False)
+            resp = requests.put(self.vrops_site + api_url,
+                                auth=(self.vrops_user, self.vrops_password),
+                                verify = False)
 
             if resp.status_code is not 204:
-                log.warn("Failed to enable REST plugin {}. \nResponse code {}\nResponse Content: {}"\
-                .format(plugin_name, resp.status_code, resp.content))
+                self.logger.warn("Failed to enable REST plugin {}. \nResponse code {}\nResponse Content: {}"\
+                        .format(plugin_name, resp.status_code, resp.content))
                 return False
 
-            log.info("Enabled REST plugin {}.".format(plugin_name))
+            self.logger.info("Enabled REST plugin {}.".format(plugin_name))
             return True
 
         except Exception as exp:
-            log.warn("Error enabling REST plugin for {} plugin: Exception: {}\n{}".format(plugin_name, exp, traceback.format_exc()))
+            self.logger.warn("Error enabling REST plugin for {} plugin: Exception: {}\n{}"\
+                    .format(plugin_name, exp, traceback.format_exc()))
 
-    def create_alarm_notification(self, alarm_name, alarm_id, resource_id):
+    def create_alarm_notification_rule(self, alarm_name, alarm_id, resource_id):
         """
-        Create notification for each alarm
+        Create notification rule for each alarm
         Params:
             alarm_name
             alarm_id
@@ -378,37 +520,21 @@ class MonPlugin():
         """
         notification_name = 'notify_' + alarm_name
         notification_id = None
+        plugin_name = 'MON_module_REST_Plugin'
 
         #1) Find the REST Plugin id details for - MON_module_REST_Plugin
-        api_url = '/suite-api/api/alertplugins'
-        headers = {'Accept': 'application/xml'}
-        namespace = {'params':"http://webservice.vmware.com/vRealizeOpsMgr/1.0/"}
-
-        resp = requests.get(self.vrops_site + api_url,
-                            auth=(self.vrops_user, self.vrops_password),
-                            verify = False, headers = headers)
-
-        if resp.status_code is not 200:
-            log.warn("Failed to REST GET Alarm plugin details \nResponse code: {}\nResponse content: {}"\
-            .format(resp.status_code, resp.content))
-            return None
-
-        # Look for specific plugin & parse pluginId for 'MON_module_REST_Plugin'
-        xmlroot_resp = XmlElementTree.fromstring(resp.content)
-        for notify_plugin in xmlroot_resp.findall('params:notification-plugin',namespace):
-            if notify_plugin.find('params:name',namespace) is not None and notify_plugin.find('params:pluginId',namespace) is not None:
-                if notify_plugin.find('params:name',namespace).text == 'MON_module_REST_Plugin':
-                    plugin_id = notify_plugin.find('params:pluginId',namespace).text
-
+        plugin_id = self.check_if_plugin_configured(plugin_name)
         if plugin_id is None:
-            log.warn("Failed to get REST plugin_id for : {}".format('MON_module_REST_Plugin'))
+            self.logger.warn("Failed to get REST plugin_id for : {}".format('MON_module_REST_Plugin'))
             return None
 
         #2) Create Alarm notification rule
         api_url = '/suite-api/api/notifications/rules'
         headers = {'Content-Type': 'application/xml'}
         data = """<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
-                    <ops:notification-rule xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ops="http://webservice.vmware.com/vRealizeOpsMgr/1.0/">
+                    <ops:notification-rule xmlns:xs="http://www.w3.org/2001/XMLSchema"
+                        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+                        xmlns:ops="http://webservice.vmware.com/vRealizeOpsMgr/1.0/">
                         <ops:name>{0:s}</ops:name>
                         <ops:pluginId>{1:s}</ops:pluginId>
                         <ops:resourceFilter resourceId="{2:s}">
@@ -417,7 +543,8 @@ class MonPlugin():
                         <ops:alertDefinitionIdFilters>
                             <ops:values>{3:s}</ops:values>
                         </ops:alertDefinitionIdFilters>
-                    </ops:notification-rule>""".format(notification_name, plugin_id, resource_id, alarm_id)
+                    </ops:notification-rule>"""\
+                    .format(notification_name, plugin_id, resource_id, alarm_id)
 
         resp = requests.post(self.vrops_site + api_url,
                              auth=(self.vrops_user, self.vrops_password),
@@ -426,8 +553,9 @@ class MonPlugin():
                              data=data)
 
         if resp.status_code is not 201:
-            log.warn("Failed to create Alarm notification {} for {} alarm. \nResponse code: {}\nResponse content: {}"\
-            .format(notification_name, alarm_name, resp.status_code, resp.content))
+            self.logger.warn("Failed to create Alarm notification rule {} for {} alarm."\
+                        "\nResponse code: {}\nResponse content: {}"\
+                        .format(notification_name, alarm_name, resp.status_code, resp.content))
             return None
 
         #parse notification id from response
@@ -435,7 +563,7 @@ class MonPlugin():
         if xmlroot_resp is not None and 'id' in xmlroot_resp.attrib:
             notification_id = xmlroot_resp.attrib.get('id')
 
-        log.info("Created Alarm notification rule {} for {} alarm.".format(notification_name, alarm_name))
+        self.logger.info("Created Alarm notification rule {} for {} alarm.".format(notification_name, alarm_name))
         return notification_id
 
     def get_vm_moref_id(self, vapp_uuid):
@@ -448,11 +576,12 @@ class MonPlugin():
                 if vm_details and "vm_vcenter_info" in vm_details:
                     vm_moref_id = vm_details["vm_vcenter_info"].get("vm_moref_id", None)
 
-            log.info("Found vm_moref_id: {} for vApp UUID: {}".format(vm_moref_id, vapp_uuid))
+            self.logger.info("Found vm_moref_id: {} for vApp UUID: {}".format(vm_moref_id, vapp_uuid))
             return vm_moref_id
 
         except Exception as exp:
-            log.warn("Error occurred while getting VM moref ID for VM : {}\n{}".format(exp, traceback.format_exc()))
+            self.logger.warn("Error occurred while getting VM moref ID for VM : {}\n{}"\
+                        .format(exp, traceback.format_exc()))
 
 
     def get_vapp_details_rest(self, vapp_uuid=None):
@@ -472,7 +601,7 @@ class MonPlugin():
         vca = self.connect_as_admin()
 
         if not vca:
-            log.warn("connect() to vCD is failed")
+            self.logger.warn("connect() to vCD is failed")
         if vapp_uuid is None:
             return None
 
@@ -485,7 +614,8 @@ class MonPlugin():
                                     verify=vca.verify)
 
             if response.status_code != 200:
-                log.warn("REST API call {} failed. Return status code {}".format(get_vapp_restcall, response.content))
+                self.logger.warn("REST API call {} failed. Return status code {}"\
+                            .format(get_vapp_restcall, response.content))
                 return parsed_respond
 
             try:
@@ -509,7 +639,8 @@ class MonPlugin():
                         parsed_respond["vm_vcenter_info"]= vm_vcenter_info
 
             except Exception as exp :
-                log.warn("Error occurred calling rest api for getting vApp details: {}\n{}".format(exp, traceback.format_exc()))
+                self.logger.warn("Error occurred calling rest api for getting vApp details: {}\n{}"\
+                            .format(exp, traceback.format_exc()))
 
         return parsed_respond
 
@@ -523,20 +654,21 @@ class MonPlugin():
                 The return vca object that letter can be used to connect to vcloud direct as admin for provider vdc
         """
 
-        log.info("Logging in to a VCD org as admin.")
+        self.logger.info("Logging in to a VCD org as admin.")
 
         vca_admin = VCA(host=self.vcloud_site,
-                        username=self.vcloud_username,
+                        username=self.admin_username,
                         service_type='standalone',
                         version='5.9',
                         verify=False,
                         log=False)
-        result = vca_admin.login(password=self.vcloud_password, org='System')
+        result = vca_admin.login(password=self.admin_password, org='System')
         if not result:
-            log.warn("Can't connect to a vCloud director as: {}".format(self.vcloud_username))
+            self.logger.warn("Can't connect to a vCloud director as: {}".format(self.admin_username))
         result = vca_admin.login(token=vca_admin.token, org='System', org_url=vca_admin.vcloud_session.org_url)
         if result is True:
-            log.info("Successfully logged to a vcloud direct org: {} as user: {}".format('System', self.vcloud_username))
+            self.logger.info("Successfully logged to a vcloud direct org: {} as user: {}"\
+                        .format('System', self.admin_username))
 
         return vca_admin
 
@@ -556,7 +688,7 @@ class MonPlugin():
                             verify = False, headers = headers)
 
         if resp.status_code is not 200:
-            log.warn("Failed to get resource details from vROPs for {}\nResponse code:{}\nResponse Content: {}"\
+            self.logger.warn("Failed to get resource details from vROPs for {}\nResponse code:{}\nResponse Content: {}"\
                     .format(vm_moref_id, resp.status_code, resp.content))
             return None
 
@@ -573,8 +705,516 @@ class MonPlugin():
                                     resourceIdentifiers = child
                                     for r_id in resourceIdentifiers:
                                         if r_id.find('params:value',namespace).text == vm_moref_id:
-                                            log.info("Found Resource ID : {} in vROPs for {}".format(resource.attrib['identifier'], vm_moref_id))
+                                            self.logger.info("Found Resource ID : {} in vROPs for {}"\
+                                                    .format(resource.attrib['identifier'], vm_moref_id))
                                             return resource.attrib['identifier']
         except Exception as exp:
-            log.warn("Error in parsing {}\n{}".format(exp, traceback.format_exc()))
+            self.logger.warn("Error in parsing {}\n{}".format(exp, traceback.format_exc()))
+
+
+    def get_metrics_data(self, metric={}):
+        """Get an individual metric's data of a resource.
+        Params:
+            'metric_name': Normalized name of metric (string)
+            'resource_uuid': Resource UUID (string)
+            'period': Time period in Period Unit for which metrics data to be collected from
+                        Monitoring tool from now.
+            'period_unit': Period measurement unit can be one of 'HR', 'DAY', 'MONTH', 'YEAR'
+
+        Return a dict that contains:
+            'metric_name': Normalized name of metric (string)
+            'resource_uuid': Resource UUID (string)
+            'tenant_id': tenent id name in which the resource is present in string format
+            'metrics_data': Dictionary containing time_series & metric_series data.
+                'time_series': List of individual time stamp values in msec
+                'metric_series': List of individual metrics data values
+        Raises an exception upon error or when network is not found
+        """
+        return_data = {}
+        return_data['schema_version'] = 1.0
+        return_data['schema_type'] = 'read_metric_data_response'
+        return_data['metric_name'] = metric['metric_name']
+        #To do - No metric_uuid in vROPs, thus returning '0'
+        return_data['metric_uuid'] = '0'
+        return_data['correlation_id'] = metric['correlation_id']
+        return_data['resource_uuid'] = metric['resource_uuid']
+        return_data['metrics_data'] = {'time_series':[], 'metric_series':[]}
+        #To do - Need confirmation about uuid & id
+        if 'tenant_uuid' in metric and metric['tenant_uuid'] is not None:
+            return_data['tenant_uuid'] = metric['tenant_uuid']
+        else:
+            return_data['tenant_uuid'] = None
+        return_data['unit'] = None
+        #return_data['tenant_id'] = self.tenant_id
+        #self.logger.warn("return_data: {}".format(return_data))
+
+        #1) Get metric details from plugin specific file & format it into vROPs metrics
+        metric_key_params = self.get_default_Params(metric['metric_name'])
+
+        if not metric_key_params:
+            self.logger.warn("Metric not supported: {}".format(metric['metric_name']))
+            #To Do: Return message
+            return return_data
+
+        return_data['unit'] = metric_key_params['unit']
+
+        #2) Find the resource id in vROPs based on OSM resource_uuid
+        #2.a) Find vm_moref_id from vApp uuid in vCD
+        vm_moref_id = self.get_vm_moref_id(metric['resource_uuid'])
+        if vm_moref_id is None:
+            self.logger.warn("Failed to find vm morefid for vApp in vCD: {}".format(config_dict['resource_uuid']))
+            return return_data
+        #2.b) Based on vm_moref_id, find VM's corresponding resource_id in vROPs to set notification
+        resource_id = self.get_vm_resource_id(vm_moref_id)
+        if resource_id is None:
+            self.logger.warn("Failed to find resource in vROPs: {}".format(config_dict['resource_uuid']))
+            return return_data
+
+        #3) Calculate begin & end time for period & period unit
+        end_time = int(round(time.time() * 1000))
+        if metric['collection_unit'] == 'YR':
+            time_diff = PERIOD_MSEC[metric['collection_unit']]
+        else:
+            time_diff = metric['collection_period']* PERIOD_MSEC[metric['collection_unit']]
+        begin_time = end_time - time_diff
+
+        #4) Get the metrics data
+        self.logger.info("metric_key_params['metric_key'] = {}".format(metric_key_params['metric_key']))
+        self.logger.info("end_time: {}, begin_time: {}".format(end_time, begin_time))
+
+        url_list = ['/suite-api/api/resources/', resource_id, '/stats?statKey=',\
+                    metric_key_params['metric_key'], '&begin=', str(begin_time),'&end=',str(end_time)]
+        api_url = ''.join(url_list)
+        headers = {'Accept': 'application/json'}
+
+        resp = requests.get(self.vrops_site + api_url,
+                            auth=(self.vrops_user, self.vrops_password),
+                            verify = False, headers = headers)
+
+        if resp.status_code is not 200:
+            self.logger.warn("Failed to retrive Metric data from vROPs for {}\nResponse code:{}\nResponse Content: {}"\
+                    .format(metric['metric_name'], resp.status_code, resp.content))
+            return return_data
+
+        #5) Convert to required format
+        metrics_data = {}
+        json_data = json.loads(resp.content)
+        for resp_key,resp_val in json_data.iteritems():
+            if resp_key == 'values':
+                data = json_data['values'][0]
+                for data_k,data_v in data.iteritems():
+                    if data_k == 'stat-list':
+                        stat_list = data_v
+                        for stat_list_k,stat_list_v in stat_list.iteritems():
+                            for stat_keys,stat_vals in stat_list_v[0].iteritems():
+                                if stat_keys == 'timestamps':
+                                    metrics_data['time_series'] = stat_list_v[0]['timestamps']
+                                if stat_keys == 'data':
+                                    metrics_data['metric_series'] = stat_list_v[0]['data']
+
+        return_data['metrics_data'] = metrics_data
+
+        return return_data
+
+    def update_alarm_configuration(self, new_alarm_config):
+        """Update alarm configuration (i.e. Symptom & alarm) as per request
+        """
+        #1) Get Alarm details from it's uuid & find the symptom defination
+        alarm_details_json, alarm_details = self.get_alarm_defination_details(new_alarm_config['alarm_uuid'])
+        if alarm_details_json is None:
+            return None
+
+        try:
+            #2) Update the symptom defination
+            if alarm_details['alarm_id'] is not None and alarm_details['symptom_definition_id'] is not None:
+                symptom_defination_id = alarm_details['symptom_definition_id']
+            else:
+                self.logger.info("Symptom Defination ID not found for {}".format(new_alarm_config['alarm_uuid']))
+                return None
+
+            symptom_uuid = self.update_symptom_defination(symptom_defination_id, new_alarm_config)
+
+            #3) Update the alarm defination & Return UUID if successful update
+            if symptom_uuid is None:
+                self.logger.info("Symptom Defination details not found for {}"\
+                                .format(new_alarm_config['alarm_uuid']))
+                return None
+            else:
+                alarm_uuid = self.reconfigure_alarm(alarm_details_json, new_alarm_config)
+                if alarm_uuid is None:
+                    return None
+                else:
+                    return alarm_uuid
+        except:
+            self.logger.error("Exception while updating alarm: {}".format(traceback.format_exc()))
+
+    def get_alarm_defination_details(self, alarm_uuid):
+        """Get alarm details based on alarm UUID
+        """
+        if alarm_uuid is None:
+            self.logger.warn("get_alarm_defination_details: Alarm UUID not provided")
+            return None, None
+
+        alarm_details = {}
+        json_data = {}
+        api_url = '/suite-api/api/alertdefinitions/AlertDefinition-'
+        headers = {'Accept': 'application/json'}
+
+        resp = requests.get(self.vrops_site + api_url + alarm_uuid,
+                            auth=(self.vrops_user, self.vrops_password),
+                            verify = False, headers = headers)
+
+        if resp.status_code is not 200:
+            self.logger.warn("Alarm to be updated not found: {}\nResponse code:{}\nResponse Content: {}"\
+                    .format(alarm_uuid, resp.status_code, resp.content))
+            return None, None
+
+        try:
+            json_data = json.loads(resp.content)
+            if json_data['id'] is not None:
+                alarm_details['alarm_id'] = json_data['id']
+                alarm_details['alarm_name'] = json_data['name']
+                alarm_details['adapter_kind'] = json_data['adapterKindKey']
+                alarm_details['resource_kind'] = json_data['resourceKindKey']
+                alarm_details['type'] = json_data['type']
+                alarm_details['sub_type'] = json_data['subType']
+                alarm_details['symptom_definition_id'] = json_data['states'][0]['base-symptom-set']['symptomDefinitionIds'][0]
+        except exception as exp:
+            self.logger.warn("Exception while retriving alarm defination details: {}".format(exp))
+            return None, None
+
+        return json_data, alarm_details
+
+
+    def update_symptom_defination(self, symptom_uuid, new_alarm_config):
+        """Update symptom defination based on new alarm input configuration
+        """
+        #1) Get symptom defination details
+        symptom_details = self.get_symptom_defination_details(symptom_uuid)
+        #print "\n\nsymptom_details: {}".format(symptom_details)
+        if symptom_details is None:
+            return None
+
+        if new_alarm_config.has_key('severity') and new_alarm_config['severity'] is not None:
+            symptom_details['state']['severity'] = severity_mano2vrops[new_alarm_config['severity']]
+        if new_alarm_config.has_key('operation') and new_alarm_config['operation'] is not None:
+            symptom_details['state']['condition']['operator'] = OPERATION_MAPPING[new_alarm_config['operation']]
+        if new_alarm_config.has_key('threshold_value') and new_alarm_config['threshold_value'] is not None:
+            symptom_details['state']['condition']['value'] = new_alarm_config['threshold_value']
+        #Find vrops metric key from metric_name, if required
+        """
+        if new_alarm_config.has_key('metric_name') and new_alarm_config['metric_name'] is not None:
+            metric_key_params = self.get_default_Params(new_alarm_config['metric_name'])
+            if not metric_key_params:
+                self.logger.warn("Metric not supported: {}".format(config_dict['metric_name']))
+                return None
+            symptom_details['state']['condition']['key'] = metric_key_params['metric_key']
+        """
+        self.logger.info("Fetched Symptom details : {}".format(symptom_details))
+
+        api_url = '/suite-api/api/symptomdefinitions'
+        headers = {'Content-Type': 'application/json', 'Accept':'application/json'}
+        data = json.dumps(symptom_details)
+        resp = requests.put(self.vrops_site + api_url,
+                             auth=(self.vrops_user, self.vrops_password),
+                             headers=headers,
+                             verify = False,
+                             data=data)
+
+        if resp.status_code != 200:
+            self.logger.warn("Failed to update Symptom definition: {}, response {}"\
+                    .format(symptom_uuid, resp.content))
+            return None
+
+
+        if symptom_uuid is not None:
+            self.logger.info("Symptom defination updated {} for alarm: {}"\
+                    .format(symptom_uuid, new_alarm_config['alarm_uuid']))
+            return symptom_uuid
+        else:
+            self.logger.warn("Failed to update Symptom Defination {} for : {}"\
+                    .format(symptom_uuid, new_alarm_config['alarm_uuid']))
+            return None
+
+
+    def get_symptom_defination_details(self, symptom_uuid):
+        """Get symptom defination details
+        """
+        symptom_details = {}
+        if symptom_uuid is None:
+            self.logger.warn("get_symptom_defination_details: Symptom UUID not provided")
+            return None
+
+        api_url = '/suite-api/api/symptomdefinitions/'
+        headers = {'Accept': 'application/json'}
+
+        resp = requests.get(self.vrops_site + api_url + symptom_uuid,
+                            auth=(self.vrops_user, self.vrops_password),
+                            verify = False, headers = headers)
+
+        if resp.status_code is not 200:
+            self.logger.warn("Symptom defination not found {} \nResponse code:{}\nResponse Content: {}"\
+                    .format(symptom_uuid, resp.status_code, resp.content))
+            return None
+
+        symptom_details = json.loads(resp.content)
+        #print "New symptom Details: {}".format(symptom_details)
+        return symptom_details
+
+
+    def reconfigure_alarm(self, alarm_details_json, new_alarm_config):
+        """Reconfigure alarm defination as per input
+        """
+        if new_alarm_config.has_key('severity') and new_alarm_config['severity'] is not None:
+            alarm_details_json['states'][0]['severity'] = new_alarm_config['severity']
+        if new_alarm_config.has_key('description') and new_alarm_config['description'] is not None:
+            alarm_details_json['description'] = new_alarm_config['description']
+
+        api_url = '/suite-api/api/alertdefinitions'
+        headers = {'Content-Type': 'application/json', 'Accept':'application/json'}
+        data = json.dumps(alarm_details_json)
+        resp = requests.put(self.vrops_site + api_url,
+                             auth=(self.vrops_user, self.vrops_password),
+                             headers=headers,
+                             verify = False,
+                             data=data)
+
+        if resp.status_code != 200:
+            self.logger.warn("Failed to create Symptom definition: {}, response code {}, response content: {}"\
+                    .format(symptom_uuid, resp.status_code, resp.content))
+            return None
+        else:
+            parsed_alarm_details = json.loads(resp.content)
+            alarm_def_uuid = parsed_alarm_details['id'].split('-', 1)[1]
+            self.logger.info("Successfully updated Alarm defination: {}".format(alarm_def_uuid))
+            return alarm_def_uuid
+
+    def delete_alarm_configuration(self, delete_alarm_req_dict):
+        """Delete complete alarm configuration
+        """
+        if delete_alarm_req_dict['alarm_uuid'] is None:
+            self.logger.info("delete_alarm_configuration: Alarm UUID not provided")
+            return None
+        #1)Get alarm & symptom defination details
+        alarm_details_json, alarm_details = self.get_alarm_defination_details(delete_alarm_req_dict['alarm_uuid'])
+        if alarm_details is None or alarm_details_json is None:
+            return None
+
+        #2) Delete alarm notfication
+        rule_id = self.delete_notification_rule(alarm_details['alarm_name'])
+        if rule_id is None:
+            return None
+
+        #3) Delete alarm configuraion
+        alarm_id = self.delete_alarm_defination(alarm_details['alarm_id'])
+        if alarm_id is None:
+            return None
+
+        #4) Delete alarm symptom
+        symptom_id = self.delete_symptom_definition(alarm_details['symptom_definition_id'])
+        if symptom_id is None:
+            return None
+        else:
+            self.logger.info("Completed deleting alarm configuration: {}"\
+                    .format(delete_alarm_req_dict['alarm_uuid']))
+            return delete_alarm_req_dict['alarm_uuid']
+
+    def delete_notification_rule(self, alarm_name):
+        """Deleted notification rule defined for a particular alarm
+        """
+        rule_id = self.get_notification_rule_id_by_alarm_name(alarm_name)
+        if rule_id is None:
+            return None
+        else:
+            api_url = '/suite-api/api/notifications/rules/'
+            headers = {'Accept':'application/json'}
+            resp = requests.delete(self.vrops_site + api_url + rule_id,
+                                auth=(self.vrops_user, self.vrops_password),
+                                verify = False, headers = headers)
+            if resp.status_code is not 204:
+                self.logger.warn("Failed to delete notification rules for {}".format(alarm_name))
+                return None
+            else:
+                self.logger.info("Deleted notification rules for {}".format(alarm_name))
+                return rule_id
+
+    def get_notification_rule_id_by_alarm_name(self, alarm_name):
+        """Find created Alarm notification rule id by alarm name
+        """
+        alarm_notify_id = 'notify_' + alarm_name
+        api_url = '/suite-api/api/notifications/rules'
+        headers = {'Content-Type': 'application/json', 'Accept':'application/json'}
+        resp = requests.get(self.vrops_site + api_url,
+                            auth=(self.vrops_user, self.vrops_password),
+                            verify = False, headers = headers)
+
+        if resp.status_code is not 200:
+            self.logger.warn("Failed to get notification rules details for {}"\
+                    .format(delete_alarm_req_dict['alarm_name']))
+            return None
+
+        notifications = json.loads(resp.content)
+        if notifications is not None and notifications.has_key('notification-rule'):
+            notifications_list = notifications['notification-rule']
+            for dict in notifications_list:
+                if dict['name'] is not None and dict['name'] == alarm_notify_id:
+                    notification_id = dict['id']
+                    self.logger.info("Found Notification id to be deleted: {} for {}"\
+                            .format(notification_id, alarm_name))
+                    return notification_id
+
+            self.logger.warn("Notification id to be deleted not found for {}"\
+                            .format(notification_id, alarm_name))
+            return None
+
+    def delete_alarm_defination(self, alarm_id):
+        """Delete created Alarm defination
+        """
+        api_url = '/suite-api/api/alertdefinitions/'
+        headers = {'Accept':'application/json'}
+        resp = requests.delete(self.vrops_site + api_url + alarm_id,
+                            auth=(self.vrops_user, self.vrops_password),
+                            verify = False, headers = headers)
+        if resp.status_code is not 204:
+            self.logger.warn("Failed to delete alarm definition {}".format(alarm_id))
+            return None
+        else:
+            self.logger.info("Deleted alarm definition {}".format(alarm_id))
+            return alarm_id
+
+    def delete_symptom_definition(self, symptom_id):
+        """Delete symptom defination
+        """
+        api_url = '/suite-api/api/symptomdefinitions/'
+        headers = {'Accept':'application/json'}
+        resp = requests.delete(self.vrops_site + api_url + symptom_id,
+                            auth=(self.vrops_user, self.vrops_password),
+                            verify = False, headers = headers)
+        if resp.status_code is not 204:
+            self.logger.warn("Failed to delete symptom definition {}".format(symptom_id))
+            return None
+        else:
+            self.logger.info("Deleted symptom definition {}".format(symptom_id))
+            return symptom_id
+
+
+    def verify_metric_support(self, metric_info):
+        """Verify, if Metric is supported by vROPs plugin, verify metric unit & return status
+            Returns:
+            status: True if supported, False if not supported
+        """
+        status = False
+        if 'metric_name' not in metric_info:
+            self.logger.debug("Metric name not provided: {}".format(metric_info))
+            return status
+        metric_key_params = self.get_default_Params(metric_info['metric_name'])
+        if not metric_key_params:
+            self.logger.warn("Metric not supported: {}".format(metric_info['metric_name']))
+            return status
+        else:
+            #If Metric is supported, verify optional metric unit & return status
+            if 'metric_unit' in metric_info:
+                if metric_key_params.get('unit') == metric_info['metric_unit']:
+                    self.logger.info("Metric is supported with unit: {}".format(metric_info['metric_name']))
+                    status = True
+                else:
+                    self.logger.debug("Metric supported but there is unit mismatch for: {}."\
+                                    "Supported unit: {}"\
+                                    .format(metric_info['metric_name'],metric_key_params['unit']))
+                    status = True
+        return status
+
+    def get_triggered_alarms_list(self, list_alarm_input):
+        """Get list of triggered alarms on a resource based on alarm input request.
+        """
+        #TO Do - Need to add filtering of alarms based on Severity & alarm name
+
+        triggered_alarms_list = []
+        if list_alarm_input['resource_uuid'] is None:
+            return triggered_alarms_list
+
+        #1)Find vROPs resource ID using RO resource UUID
+        vrops_resource_id = self.get_vrops_resourceid_from_ro_uuid(list_alarm_input['resource_uuid'])
+        if vrops_resource_id is None:
+            return triggered_alarms_list
+
+        #2)Get triggered alarms on particular resource
+        triggered_alarms_list = self.get_triggered_alarms_on_resource(list_alarm_input['resource_uuid'], vrops_resource_id)
+        return triggered_alarms_list
+
+    def get_vrops_resourceid_from_ro_uuid(self, ro_resource_uuid):
+        """Fetch vROPs resource ID using resource UUID from RO/SO
+        """
+        #1) Find vm_moref_id from vApp uuid in vCD
+        vm_moref_id = self.get_vm_moref_id(ro_resource_uuid)
+        if vm_moref_id is None:
+            self.logger.warn("Failed to find vm morefid for vApp in vCD: {}".format(ro_resource_uuid))
+            return None
+
+        #2) Based on vm_moref_id, find VM's corresponding resource_id in vROPs to set notification
+        vrops_resource_id = self.get_vm_resource_id(vm_moref_id)
+        if vrops_resource_id is None:
+            self.logger.warn("Failed to find resource in vROPs: {}".format(ro_resource_uuid))
+            return None
+        return vrops_resource_id
+
+
+    def get_triggered_alarms_on_resource(self, ro_resource_uuid, vrops_resource_id):
+        """Get triggered alarms on particular resource & return list of dictionary of alarms
+        """
+        resource_alarms = []
+        api_url = '/suite-api/api/alerts?resourceId='
+        headers = {'Accept':'application/json'}
+        resp = requests.get(self.vrops_site + api_url + vrops_resource_id,
+                            auth=(self.vrops_user, self.vrops_password),
+                            verify = False, headers = headers)
+
+        if resp.status_code is not 200:
+            self.logger.warn("Failed to get notification rules details for {}"\
+                    .format(delete_alarm_req_dict['alarm_name']))
+            return None
+
+        all_alerts = json.loads(resp.content)
+        if all_alerts.has_key('alerts'):
+            if not all_alerts['alerts']:
+                self.logger.info("No alarms present on resource {}".format(ro_resource_uuid))
+                return resource_alarms
+            all_alerts_list = all_alerts['alerts']
+            for alarm in all_alerts_list:
+                #self.logger.info("Triggered Alarm {}".format(alarm))
+                if alarm['alertDefinitionName'] is not None and\
+                    len(alarm['alertDefinitionName'].split('-', 1)) == 2:
+                        if alarm['alertDefinitionName'].split('-', 1)[1] == ro_resource_uuid:
+                            alarm_instance = {}
+                            alarm_instance['alarm_uuid'] = alarm['alertDefinitionId'].split('-', 1)[1]
+                            alarm_instance['resource_uuid'] = ro_resource_uuid
+                            alarm_instance['alarm_instance_uuid'] = alarm['alertId']
+                            alarm_instance['vim_type'] = 'VMware'
+                            #find severity of alarm
+                            severity = None
+                            for key,value in severity_mano2vrops.iteritems():
+                                if value == alarm['alertLevel']:
+                                    severity = key
+                            if severity is None:
+                                severity = 'INDETERMINATE'
+                            alarm_instance['severity'] = severity
+                            alarm_instance['status'] = alarm['status']
+                            alarm_instance['start_date'] = self.convert_date_time(alarm['startTimeUTC'])
+                            alarm_instance['update_date'] = self.convert_date_time(alarm['updateTimeUTC'])
+                            alarm_instance['cancel_date'] = self.convert_date_time(alarm['cancelTimeUTC'])
+                            self.logger.info("Triggered Alarm on resource {}".format(alarm_instance))
+                            resource_alarms.append(alarm_instance)
+        if not resource_alarms:
+            self.logger.info("No alarms present on resource {}".format(ro_resource_uuid))
+        return resource_alarms
+
+    def convert_date_time(self, date_time):
+        """Convert the input UTC time in msec to OSM date time format
+        """
+        date_time_formatted = '0000-00-00T00:00:00'
+        if date_time != 0:
+            complete_datetime = datetime.datetime.fromtimestamp(date_time/1000.0).isoformat('T')
+            date_time_formatted = complete_datetime.split('.',1)[0]
+        return date_time_formatted
+