Add alertmanager integration for heartbeat support (#2807)

Related to https://github.com/grafana/oncall/issues/2801 and
https://github.com/grafana/support-escalations/issues/7081.

---------

Co-authored-by: Innokentii Konstantinov <innokenty.konstantinov@grafana.com>

CHANGELOG.md

@@ -24,6 +24,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Fix issue with updating "Require resolution note" setting by @Ferril ([#2782](https://github.com/grafana/oncall/pull/2782))
 - Don't send notifications about past SSRs when turning on info notifications by @vadimkerr ([#2783](https://github.com/grafana/oncall/pull/2783))
 - Add schedule shift type validation on create/preview ([#2789](https://github.com/grafana/oncall/pull/2789))
+- Add alertmanager integration for heartbeat support ([2807](https://github.com/grafana/oncall/pull/2807))
 
 ## v1.3.23 (2023-08-10)
 

engine/apps/alerts/tests/test_alert_receiver_channel.py

@@ -206,3 +206,17 @@ def test_get_or_create_manual_integration_deleted_team(make_organization, make_t
         organization=organization, team=None, integration=AlertReceiveChannel.INTEGRATION_MANUAL, defaults={}
     )
     assert integration == general_manual
+
+
+@pytest.mark.django_db
+@pytest.mark.parametrize(
+    "integration",
+    [
+        AlertReceiveChannel.INTEGRATION_LEGACY_ALERTMANAGER,
+        AlertReceiveChannel.INTEGRATION_ALERTMANAGER,
+    ],
+)
+def test_alertmanager_available_for_heartbeat(make_organization, make_alert_receive_channel, integration):
+    organization = make_organization()
+    alert_receive_channel = make_alert_receive_channel(organization, integration=integration)
+    assert alert_receive_channel.is_available_for_integration_heartbeat

engine/apps/integrations/metadata/heartbeat/__init__.py

@@ -4,6 +4,7 @@ Files from this modules are integrations for which heartbeat is available (if fi
 Filename MUST match INTEGRATION_TO_REVERSE_URL_MAP.
 """
 
+import apps.integrations.metadata.heartbeat.alertmanager  # noqa
 import apps.integrations.metadata.heartbeat.elastalert  # noqa
 import apps.integrations.metadata.heartbeat.formatted_webhook  # noqa
 import apps.integrations.metadata.heartbeat.grafana  # noqa

engine/apps/integrations/metadata/heartbeat/alertmanager.py

@@ -37,7 +37,10 @@ heartbeat_expired_payload = {
     "numResolved": 0,
     "commonLabels": {"alertname": "OnCallHeartBeatMissing"},
     "truncatedAlerts": 0,
-    "commonAnnotations": {},
+    "commonAnnotations": {
+        "title": heartbeat_expired_title,
+        "description": heartbeat_expired_message,
+    },
 }
 
 heartbeat_restored_title = heartbeat_text.heartbeat_restored_title
@@ -61,7 +64,7 @@ heartbeat_restored_payload = {
             "generatorURL": "",
         },
     ],
-    "status": "firing",
+    "status": "resolved",
     "version": "4",
     "groupKey": '{}:{alertname="OnCallHeartBeatMissing"}',
     "receiver": "",
@@ -71,5 +74,8 @@ heartbeat_restored_payload = {
     "numResolved": 1,
     "commonLabels": {"alertname": "OnCallHeartBeatMissing"},
     "truncatedAlerts": 0,
-    "commonAnnotations": {},
+    "commonAnnotations": {
+        "title": heartbeat_restored_title,
+        "description": heartbeat_restored_message,
+    },
 }