integrations: Add AlertManager webhook.

static/images/integrations/logos/prometheus.svg

@@ -0,0 +1 @@
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zerver/lib/integrations.py

@@ -227,6 +227,12 @@ EMBEDDED_BOTS = [
 
 WEBHOOK_INTEGRATIONS = [
     WebhookIntegration('airbrake', ['monitoring']),
+    WebhookIntegration(
+        'alertmanager',
+        ['monitoring'],
+        display_name='Prometheus AlertManager',
+        logo='images/integrations/logos/prometheus.svg'
+    ),
     WebhookIntegration('ansibletower', ['deployment'], display_name='Ansible Tower'),
     WebhookIntegration('appfollow', ['customer-support'], display_name='AppFollow'),
     WebhookIntegration('appveyor', ['continuous-integration'], display_name='AppVeyor'),

zerver/webhooks/alertmanager/doc.md

@@ -0,0 +1,23 @@
+Get Zulip notifications from AlertManager!
+
+1. {!create-stream.md!}
+
+1. {!create-bot-construct-url-indented.md!}
+
+    Additionally, you may specify URL parameters named `name` and `desc` to specify which labels
+    or annotations will be used to construct the alert message. This allows you to use arbitrary labels
+    and annotations defined in your alerting rules.
+
+        {{ api_url }}{{ integration_url }}?api_key=abcdefgh&stream=stream%20name&name=host&desc=alertname
+
+1. In your AlertManager config, set up a new webhook receiver, like so:
+
+```
+- name: ops-zulip
+  webhook_configs:
+    - url: "<the url constructed above>"
+```
+
+{!congrats.md!}
+
+![](/static/images/integrations/alertmanager/001.png)

zerver/webhooks/alertmanager/fixtures/alert.json

@@ -0,0 +1,51 @@
+{
+    "receiver": "ops-zulip",
+    "status": "firing",
+    "groupLabels": {},
+    "commonLabels": {
+        "alertname": "High CPU Temperature",
+        "severity": "critical"
+    },
+    "commonAnnotations": {
+        "summary": "High CPU core temperature"
+    },
+    "externalURL": "http://ops1:9093",
+    "version": "4",
+    "groupKey": "{}/{}:{}",
+    "alerts": [
+        {
+            "status": "firing",
+            "labels": {
+                "alertname": "High CPU Temperature",
+                "host": "andromeda",
+                "severity": "critical"
+            },
+            "annotations": {
+                "description": "CPU core temperature is 34.75C",
+                "topic": "andromeda",
+                "summary": "High CPU core temperature"
+            },
+            "startsAt": "2020-02-06T00:17:58.432911368Z",
+            "endsAt": "0001-01-01T00:00:00Z",
+            "generatorURL": "http://cobalt:9090/graph?g0.expr=avg+by%28host%29+%28sensors_temp_input%7Bfeature%3D~%22core_%5B0-9%5D%2B%22%7D%29+%3E+15&g0.tab=1",
+            "fingerprint": "a1bc48475b20e73d"
+        },
+        {
+            "status": "firing",
+            "labels": {
+                "alertname": "High CPU Temperature",
+                "host": "andromeda",
+                "severity": "critical"
+            },
+            "annotations": {
+                "description": "CPU core temperature is 17.625C",
+                "topic": "andromeda",
+                "summary": "High CPU core temperature"
+            },
+            "startsAt": "2020-02-06T00:17:58.432911368Z",
+            "endsAt": "0001-01-01T00:00:00Z",
+            "generatorURL": "http://cobalt:9090/graph?g0.expr=avg+by%28host%29+%28sensors_temp_input%7Bfeature%3D~%22core_%5B0-9%5D%2B%22%7D%29+%3E+15&g0.tab=1",
+            "fingerprint": "c2ea85182f28cbd9"
+        }
+    ]
+}

zerver/webhooks/alertmanager/fixtures/single_alert.json

@@ -0,0 +1,34 @@
+{
+    "receiver": "ops-zulip",
+    "status": "resolved",
+    "groupLabels": {},
+    "commonLabels": {
+        "alertname": "High CPU Temperature",
+        "severity": "critical"
+    },
+    "commonAnnotations": {
+        "summary": "High CPU core temperature"
+    },
+    "externalURL": "http://ops1:9093",
+    "version": "4",
+    "groupKey": "{}/{}:{}",
+    "alerts": [
+        {
+            "status": "resolved",
+            "labels": {
+                "alertname": "High CPU Temperature",
+                "host": "andromeda",
+                "severity": "critical"
+            },
+            "annotations": {
+                "description": "CPU core temperature is 34.75C",
+                "topic": "andromeda",
+                "summary": "High CPU core temperature"
+            },
+            "startsAt": "2020-02-06T00:17:58.432911368Z",
+            "endsAt": "0001-01-01T00:00:00Z",
+            "generatorURL": "http://cobalt:9090/graph?g0.expr=avg+by%28host%29+%28sensors_temp_input%7Bfeature%3D~%22core_%5B0-9%5D%2B%22%7D%29+%3E+15&g0.tab=1",
+            "fingerprint": "a1bc48475b20e73d"
+        }
+    ]
+}

zerver/webhooks/alertmanager/tests.py

@@ -0,0 +1,36 @@
+# -*- coding: utf-8 -*-
+from zerver.lib.test_classes import WebhookTestCase
+
+
+class AlertmanagerHookTests(WebhookTestCase):
+    STREAM_NAME = 'alertmanager'
+    URL_TEMPLATE = "/api/v1/external/alertmanager?&api_key={api_key}&stream={stream}&name=topic&desc=description"
+    FIXTURE_DIR_NAME = 'alertmanager'
+
+    def test_error_issue_message(self) -> None:
+        expected_topic = "andromeda"
+        expected_message = """
+:alert: **FIRING**
+* CPU core temperature is 34.75C ([graph](http://cobalt:9090/graph?g0.expr=avg+by%28host%29+%28sensors_temp_input%7Bfeature%3D~%22core_%5B0-9%5D%2B%22%7D%29+%3E+15&g0.tab=0))
+* CPU core temperature is 17.625C ([graph](http://cobalt:9090/graph?g0.expr=avg+by%28host%29+%28sensors_temp_input%7Bfeature%3D~%22core_%5B0-9%5D%2B%22%7D%29+%3E+15&g0.tab=0))
+""".strip()
+
+        self.send_and_test_stream_message(
+            'alert',
+            expected_topic,
+            expected_message,
+            "application/json"
+        )
+
+    def test_single_error_issue_message(self) -> None:
+        expected_topic = "andromeda"
+        expected_message = """
+:squared_ok: **Resolved** CPU core temperature is 34.75C ([graph](http://cobalt:9090/graph?g0.expr=avg+by%28host%29+%28sensors_temp_input%7Bfeature%3D~%22core_%5B0-9%5D%2B%22%7D%29+%3E+15&g0.tab=0))
+""".strip()
+
+        self.send_and_test_stream_message(
+            'single_alert',
+            expected_topic,
+            expected_message,
+            "application/json"
+        )

zerver/webhooks/alertmanager/view.py

@@ -0,0 +1,62 @@
+# Webhooks for external integrations.
+from typing import Any, Dict, List
+
+from django.http import HttpRequest, HttpResponse
+
+from zerver.decorator import api_key_only_webhook_view
+from zerver.lib.request import REQ, has_request_variables
+from zerver.lib.response import json_success
+from zerver.lib.webhooks.common import check_send_webhook_message
+from zerver.models import UserProfile
+
+@api_key_only_webhook_view('AlertManager')
+@has_request_variables
+def api_alertmanager_webhook(request: HttpRequest, user_profile: UserProfile,
+                             payload: Dict[str, Any] = REQ(argument_type='body')) -> HttpResponse:
+    name_field = request.GET.get("name", "instance")
+    desc_field = request.GET.get("desc", "alertname")
+    topics = {}  # type: Dict[str, Dict[str, List[str]]]
+
+    for alert in payload["alerts"]:
+        labels = alert.get("labels", {})
+        annotations = alert.get("annotations", {})
+
+        name = labels.get(
+            name_field, annotations.get(name_field, "(unknown)"))
+        desc = labels.get(
+            desc_field, annotations.get(desc_field, "<missing field: {}>".format(desc_field)))
+
+        url = alert.get("generatorURL").replace("tab=1", "tab=0")
+
+        body = "{description} ([graph]({url}))".format(description=desc, url=url)
+        if name not in topics:
+            topics[name] = {"firing": [], "resolved": []}
+        topics[name][alert["status"]].append(body)
+
+    for topic, statuses in topics.items():
+        for status, messages in statuses.items():
+            if len(messages) == 0:
+                continue
+
+            if status == "firing":
+                icon = ":alert:"
+                title = "FIRING"
+            else:
+                title = "Resolved"
+                icon = ":squared_ok:"
+
+            if len(messages) == 1:
+                body = "{icon} **{title}** {message}".format(
+                    icon=icon,
+                    title=title,
+                    message=messages[0])
+            else:
+                message_list = "\n".join(["* {}".format(m) for m in messages])
+                body = "{icon} **{title}**\n{messages}".format(
+                    icon=icon,
+                    title=title,
+                    messages=message_list)
+
+            check_send_webhook_message(request, user_profile, topic, body)
+
+    return json_success()