Refactor PostgreSQL deployment and service configuration

cluster/postgresql/pg-svc.yaml

@@ -0,0 +1,63 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: postgres-deployment
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: postgres
+  template:
+    metadata:
+      labels:
+        app: postgres
+    spec:
+      containers:
+      - name: postgres
+        image: postgres:13
+        volumeMounts:
+        - name: postgres-storage
+          mountPath: /var/lib/postgresql/data
+        ports:
+        - containerPort: 5432
+        env:
+        - name: POSTGRES_PASSWORD
+          value: "mysecretpassword"
+        - name: POSTGRES_USER
+          value: "myuser"
+        - name: POSTGRES_DB
+          value: "mydb"
+        - name: PGDATA
+          value: "/var/lib/postgresql/data"
+      volumes:
+      - name: postgres-storage
+        persistentVolumeClaim:
+          claimName: postgres-pvc
+
+---
+
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: postgres-pvc
+spec:
+  accessModes:
+    - ReadWriteOnce
+  resources:
+    requests:
+      storage: 5Gi
+
+---
+
+apiVersion: v1
+kind: Service
+metadata:
+  name: postgres-service
+spec:
+  selector:
+    app: postgres
+  ports:
+  - name: postgres
+    port: 5432
+    targetPort: 5432
+  type: ClusterIP

cluster/postgresql/readme.md

@@ -1,11 +1,11 @@
 # postgresql
 
 ```bash
-create ns postgresql-svc
+kubectl create ns postgresql-svc
 kubectl config set-context --current --namespace=postgresql-svc
-k apply -f ps-configmap.yaml
-k apply -f ps-storage.yaml
-k get pvc
+kubectl apply -f ps-configmap.yaml
+kubectl apply -f ps-storage.yaml
+kubectl get pvc
 NAME                STATUS   VOLUME               CAPACITY   ACCESS MODES   STORAGECLASS   VOLUMEATTRIBUTESCLASS   AGE
 postgres-pv-claim   Bound    postgres-pv-volume   2Gi        RWX            manual         <unset>                 6s
 
@@ -30,4 +30,10 @@ kubectl exec -it [pod-name] --  psql -h localhost -U admin --password -p [port]
 kubectl exec -it postgres-84bd99bf45-sf6xq --  psql -h localhost -U admin --password -p 5432 postgresdb
 
 helm repo add bitnami https://charts.bitnami.com/bitnami
+helm repo update
 helm install postgresql bitnami/postgresql --create-namespace -n 'postgresql-svc' --set persistence.existingClaim=postgresql-pv-claim --set volumePermissions.enabled=true
+
+kubectl delete -f ps-deployment.yaml
+kubectl delete -f ps-service.yaml
+kubectl delete -f ps-configmap.yaml
+kubectl delete -f ps-storage.yaml