use statefulSets and readinessProbes instead of initContainers

clusters/default/monitoring/jellystat/jellystat-db.yml

@@ -1,16 +1,15 @@
 ---
 apiVersion: apps/v1
-kind: Deployment
+kind: StatefulSet
 metadata:
   name: jellystat-db
   namespace: monitoring
 spec:
-  strategy:
-    type: Recreate
-  replicas: 1
   selector:
     matchLabels:
       app: jellystat-db
+  serviceName: jellystat-db
+  replicas: 1
   template:
     metadata:
       labels:
@@ -18,7 +17,7 @@ spec:
     spec:
       containers:
       - name: jellystat-db
-        image: postgres:alpine
+        image: postgres:18-alpine
         ports:
         - containerPort: 5432
         env:
@@ -36,7 +35,12 @@ spec:
         volumeMounts:
         - name: postgres-data
           mountPath: /mnt/postgres
-      volumes:
-      - name: postgres-data
-        persistentVolumeClaim:
-          claimName: jellystat-longhorn
+  volumeClaimTemplates:
+  - metadata:
+      name: postgres-data
+    spec:
+      accessModes: ["ReadWriteOnce"]
+      resources:
+        requests:
+          storage: 1Gi
+      storageClassName: longhorn

clusters/default/monitoring/jellystat/jellystat-pvc.yml

@@ -1,18 +1,3 @@
----
-apiVersion: v1
-kind: PersistentVolumeClaim
-metadata:
-  name: jellystat-longhorn
-  namespace: monitoring
-spec:
-  accessModes:
-    - ReadWriteOnce
-  volumeMode: Filesystem
-  resources:
-    requests:
-      storage: 1Gi
-  storageClassName: longhorn
-
 ---
 apiVersion: v1
 kind: PersistentVolumeClaim

clusters/default/monitoring/jellystat/jellystat-svc.yml

@@ -20,7 +20,7 @@ spec:
 apiVersion: v1
 kind: Service
 metadata:
-  name: jellystat-db-service
+  name: jellystat-db
   namespace: monitoring
 spec:
   selector:
@@ -28,3 +28,4 @@ spec:
   ports:
   - port: 5432
     targetPort: 5432
+  clusterIP: None

clusters/default/monitoring/jellystat/jellystat.yml

@@ -16,15 +16,19 @@ spec:
       labels:
         app: jellystat
     spec:
-      initContainers:
-      - name: wait-for-db
-        image: busybox
-        command: ['sh', '-c', 'until nc -z -v -w30 jellystat-db-service 5432; do echo "Waiting for database..."; sleep 5; done;']
       containers:
       - name: jellystat
         image: cyfershepard/jellystat:1.1.6
-        ports:
-        - containerPort: 3000
+        readinessProbe:
+          exec:
+            command:
+            - bash
+            - -c
+            - |
+              (echo >/dev/tcp/jellystat-db.monitoring.svc.cluster.local/5432)
+          initialDelaySeconds: 5
+          periodSeconds: 5
+          failureThreshold: 3
         env:
         - name: JWT_SECRET
           valueFrom:
@@ -37,7 +41,7 @@ spec:
               name: jellystat-secret
               key: password
         - name: POSTGRES_IP
-          value: "jellystat-db-service"
+          value: "jellystat-db.monitoring.svc.cluster.local"
         - name: POSTGRES_PORT
           value: "5432"
         - name: POSTGRES_USER