use statefulSets and readinessProbes instead of initContainers

clusters/default/git-ops/semaphore/semaphore-configmap.yml

@@ -6,7 +6,7 @@ metadata:
   namespace: git-ops
 data:
   SEMAPHORE_DB_USER: "semaphore"
-  SEMAPHORE_DB_HOST: "semaphore-db-service"
+  SEMAPHORE_DB_HOST: "semaphore-db"
   SEMAPHORE_DB_PORT: "3306"
   SEMAPHORE_DB_DIALECT: "mysql"
   SEMAPHORE_DB: "semaphore"

clusters/default/git-ops/semaphore/semaphore-db.yml

@@ -1,16 +1,15 @@
 ---
 apiVersion: apps/v1
-kind: Deployment
+kind: StatefulSet
 metadata:
   name: semaphore-db
   namespace: git-ops
 spec:
-  strategy:
-    type: Recreate
-  replicas: 1
   selector:
     matchLabels:
       app: semaphore-db
+  serviceName: semaphore-db
+  replicas: 1
   template:
     metadata:
       labels:
@@ -34,10 +33,14 @@ spec:
               name: semaphore-secrets
               key: mysql_password
         volumeMounts:
-        - name: db
+        - name: semaphore-db
           mountPath: /var/lib/mysql
-          subPath: db
-      volumes:
-      - name: db
-        persistentVolumeClaim:
-          claimName: semaphore-longhorn
+  volumeClaimTemplates:
+  - metadata:
+      name: semaphore-db
+    spec:
+      accessModes: ["ReadWriteOnce"]
+      resources:
+        requests:
+          storage: 2Gi
+      storageClassName: longhorn

clusters/default/git-ops/semaphore/semaphore-pvc.yml

@@ -1,14 +0,0 @@
----
-apiVersion: v1
-kind: PersistentVolumeClaim
-metadata:
-  name: semaphore-longhorn
-  namespace: git-ops
-spec:
-  accessModes:
-    - ReadWriteOnce
-  volumeMode: Filesystem
-  resources:
-    requests:
-      storage: 2Gi
-  storageClassName: longhorn

clusters/default/git-ops/semaphore/semaphore-svc.yml

@@ -12,14 +12,15 @@ spec:
   selector:
     app: semaphore
   ports:
-  - port: 3002
+  - name: http
+    port: 3002
     targetPort: 3000
 
 ---
 apiVersion: v1
 kind: Service
 metadata:
-  name: semaphore-db-service
+  name: semaphore-db
   namespace: git-ops
 spec:
   selector:
@@ -27,3 +28,4 @@ spec:
   ports:
   - port: 3306
     targetPort: 3306
+  clusterIP: None

clusters/default/git-ops/semaphore/semaphore.yml

@@ -16,15 +16,22 @@ spec:
       labels:
         app: semaphore
     spec:
-      initContainers:
-      - name: wait-for-db
-        image: busybox
-        command: ['sh', '-c', 'until nc -z -v -w30 semaphore-db-service 3306; do echo "Waiting for database connection..."; sleep 5; done;']
       containers:
       - name: semaphore
         image: public.ecr.aws/semaphore/pro/server:v2.16.46
+        readinessProbe:
+          exec:
+            command:
+            - sh
+            - -c
+            - |
+              nc -z semaphore-db.git-ops.svc.cluster.local 3306
+          initialDelaySeconds: 5
+          periodSeconds: 5
+          failureThreshold: 3
         ports:
-        - containerPort: 3000
+        - name: http
+          containerPort: 3000
         envFrom:
         - configMapRef:
             name: semaphore-config