migrate NATS to StatefulSet for clustering support

k8s/nats.yaml

@@ -1,10 +1,39 @@
-apiVersion: apps/v1
+apiVersion: v1
-kind: Deployment
+kind: Service
+metadata:
+  name: nats-headless
+  labels:
+    app: nats
+spec:
+  ports:
+    - port: 6222
+      name: cluster
+  clusterIP: None  #
+  selector:
+    app: nats
+---
+apiVersion: v1
+kind: Service
 metadata:
   name: nats
   labels:
     app: nats
 spec:
+  ports:
+    - port: 4222
+      name: client
+  selector:
+    app: nats
+---
+apiVersion: apps/v1
+kind: StatefulSet
+metadata:
+  name: nats
+  labels:
+    app: nats
+spec:
+  serviceName: "nats-headless"
+  replicas: 3
   selector:
     matchLabels:
       app: nats
@@ -14,24 +43,24 @@ spec:
         app: nats
     spec:
       containers:
-      - name: nats
+        - name: nats
-        image: nats:alpine
+          image: nats:alpine
-        ports:
+          # Start-Befehl für Clustering
-        - containerPort: 4222
+          command:
-        resources:
+            - "nats-server"
-          requests:
+            - "--cluster"
-            memory: "64Mi"
+            - "nats://0.0.0.0:6222"
-            cpu: "50m"
+            - "--routes"
-          limits:
+            - "nats://nats-headless:6222" # Route zeigt auf den Headless Service
-            memory: "256Mi"
+          ports:
-            cpu: "500m"
+            - containerPort: 4222
----
+              name: client
-apiVersion: v1
+            - containerPort: 6222
-kind: Service
+              name: cluster
-metadata:
+          resources:
-  name: nats
+            requests:
-spec:
+              memory: "64Mi"
-  ports:
+              cpu: "50m"
-    - port: 4222
+            limits:
-  selector:
+              memory: "256Mi"
-    app: nats
+              cpu: "500m"