Updated prometheus datasource tempest to support working with config file

Change-Id: I35fa08e9723a94e9611678efdcbbdb3a2826ff68

devstack/pre_test_hook.sh

@@ -15,4 +15,8 @@
 
 DEVSTACK_PATH="$BASE/new"
 
+# Copy prometheus_conf.yaml to /etc/vitrage directory
+ETC_VITRAGE=/etc/vitrage/
+PROMETHES_CONF_PATH=vitrage-tempest-plugin/vitrage_tempest_plugin/tests/resources/prometheus/prometheus_conf.yaml
+sudo mkdir -p $ETC_VITRAGE && sudo cp $DEVSTACK_PATH/$PROMETHES_CONF_PATH $ETC_VITRAGE
 

vitrage_tempest_plugin/tests/datasources/test_prometheus.py

@@ -31,15 +31,17 @@ RESOLVED = 'resolved'
 class TestPrometheus(BaseTestEvents):
     """Test class for Prometheus datasource"""
 
-    def test_send_prometheus_alert_without_resource_id(self):
+    def test_send_prometheus_alert_on_host_without_resource_id(self):
         """Sending an alert in Prometheus format should result in an alarm"""
         self._test_send_prometheus_alert(
-            self._create_prometheus_alert_details('host123', FIRING))
+            self._create_prometheus_alert_on_host_details('host123', FIRING))
 
-    def test_send_prometheus_alert_without_resource_id_v2(self):
+    def test_send_prometheus_alert_on_instance_without_resource_id(self):
         """Sending an alert in Prometheus format should result in an alarm"""
         self._test_send_prometheus_alert(
-            self._create_prometheus_alert_details('host457', FIRING))
+            self._create_prometheus_alert_on_instance_details('host457',
+                                                              'instance457',
+                                                              FIRING))
 
     def _test_send_prometheus_alert(self, details):
         try:
@@ -52,19 +54,18 @@ class TestPrometheus(BaseTestEvents):
             # expect to get a 'prometheus.alarm', generated by Prometheus
             # datasource
             self.assertThat(api_alarms, matchers.HasLength(1),
-                            'Expected Prometheus alarm on host')
+                            'Expected Prometheus alarm')
 
             alarm = api_alarms[0]
             self._check_alarm(alarm, details)
 
             event_time = datetime.now()
-            details['status'] = RESOLVED
+            self._resolve_alerts(details)
             self._post_event(event_time, event_type, details)
 
             api_alarms = wait_for_answer(2, 0.5, self._check_alarms)
             self.assertIsNotNone(api_alarms,)
-            self.assertThat(api_alarms, IsEmpty(), 'Expected no alarms on '
+            self.assertThat(api_alarms, IsEmpty(), 'Expected no alarms')
-                                                   'host')
 
         except Exception as e:
             LOG.exception(e)
@@ -77,7 +78,13 @@ class TestPrometheus(BaseTestEvents):
         self.assertFalse(alarm[VProps.VITRAGE_IS_PLACEHOLDER])
 
     @staticmethod
-    def _create_prometheus_alert_details(hostname, status):
+    def _resolve_alerts(details):
+        details['status'] = RESOLVED
+        for alert in details['alerts']:
+            alert['status'] = RESOLVED
+
+    @staticmethod
+    def _create_prometheus_alert_on_host_details(hostname, status):
         return {
             "status": status,
             "groupLabels": {
@@ -130,3 +137,47 @@ class TestPrometheus(BaseTestEvents):
                 "mountpoint": "/"
             }
         }
+
+    @staticmethod
+    def _create_prometheus_alert_on_instance_details(hostname,
+                                                     instance,
+                                                     status):
+        return {
+            'status': status,
+            'groupLabels': {
+                'alertname': 'HighCpuOnVmAlert'
+            },
+            'groupKey': '{}:{alertname="HighCpuOnVmAlert"}',
+            'commonAnnotations': {
+                'description': 'Test alert to test libvirt exporter.\n',
+                'title': 'High cpu usage on vm'
+            },
+            'alerts': [
+                {
+                    'status': status,
+                    'labels': {
+                        'instance': hostname,
+                        'domain': instance,
+                        'job': 'libvirt',
+                        'alertname': 'HighCpuOnVmAlert',
+                        'severity': 'critical'
+                    },
+                    'endsAt': '2019-01-15T12:29:50.91446215Z',
+                    'generatorURL': 'http://devstack-rocky-release-4:9090',
+                    'startsAt': '2019-01-15T12:26:50.91446215Z',
+                    'annotations': {
+                        'description': 'Test alert to test libvirt exporter',
+                        'title': 'High cpu usage on vm'
+                    }
+                }
+            ],
+            'version': '4',
+            'receiver': 'vitrage',
+            'externalURL': 'http://devstack-rocky-release-4:9093',
+            'commonLabels': {
+                'instance': hostname,
+                'job': 'libvirt',
+                'severity': 'critical',
+                'alertname': 'HighCpuOnVmAlert'
+            }
+        }

vitrage_tempest_plugin/tests/resources/prometheus/prometheus_conf.yaml

@@ -0,0 +1,12 @@
+alerts:
+  - key:
+      alertname: HighCpuOnVmAlert
+      job: libvirt
+    resource:
+      instance_name: domain
+      host_id: instance
+  - key:
+      alertname: HighInodeUsage
+      job: node
+    resource:
+      id: instance