prometheus-operator: Fix Alertmanager integration

prometheus-operator/application.yml

@@ -1,4 +1,22 @@
 ---
+apiVersion: monitoring.coreos.com/v1alpha1
+kind: AlertmanagerConfig
+metadata:
+  name: alertmanager
+  labels:
+    app.kubernetes.io/name: alertmanager
+spec:
+  route:
+    receiver: 'slack-notifications'
+  receivers:
+  - name: 'slack-notifications'
+    slackConfigs:
+    - channel: '#kube-prod'
+      sendResolved: true
+      apiURL:
+        name: slack-secrets
+        key: webhook-url
+---
 apiVersion: monitoring.coreos.com/v1
 kind: PodMonitor
 metadata:
@@ -15,6 +33,11 @@ kind: Alertmanager
 metadata:
   name: alertmanager
 spec:
+  alertmanagerConfigSelector:
+    matchLabels:
+      app.kubernetes.io/name: alertmanager
+  secrets:
+    - slack-secrets
   nodeSelector:
     dedicated: monitoring
   tolerations:
@@ -52,10 +75,8 @@ spec:
   alerting:
     alertmanagers:
       - namespace: prometheus-operator
-        name: alertmanager
-        port: http
-        pathPrefix: "/"
-        apiVersion: v2
+        name: alertmanager-operated
+        port: web
   externalUrl: "http://prom.k-space.ee/"
   replicas: 2
   shards: 1