Add monitoring stack (prometheus/alertmanager/grafana)

monitoring/alertmanager/alertmanager.tmpl.yml

@@ -0,0 +1,28 @@
+global:
+  resolve_timeout: 5m
+
+route:
+  receiver: telegram
+  group_by: ["alertname", "instance"]
+  group_wait: 30s
+  group_interval: 5m
+  repeat_interval: 6h
+
+receivers:
+  - name: telegram
+    telegram_configs:
+      - bot_token: "${TELEGRAM_BOT_TOKEN}"
+        chat_id: ${TELEGRAM_CHAT_ID}
+        message: |-
+          {{ range .Alerts }}
+          *{{ .Labels.alertname }}* ({{ .Labels.severity }})
+          {{ .Annotations.summary }}
+          {{ .Annotations.description }}
+          {{ end }}
+        parse_mode: Markdown
+        disable_notifications: false
+        api_url: "https://api.telegram.org"
+        send_resolved: true
+        {{- if .Env.TELEGRAM_THREAD_ID }}
+        message_thread_id: ${TELEGRAM_THREAD_ID}
+        {{- end }}