Kubernetes deployment, service, and storage PV for PostgreSQL database

Author: Webenius

Diff for: deployment.yaml renamed to app-deployment.yaml

@@ -1,7 +1,7 @@
 apiVersion: apps/v1
 kind: Deployment
 metadata:
-         name: spring-boot-deployment
+  name: spring-boot-app
 spec:
   replicas: 1
   selector:
@@ -18,5 +18,10 @@ spec:
           imagePullPolicy: Never
           ports:
             - containerPort: 8080
-
-
+          env:
+            - name: SPRING_DATASOURCE_URL
+              value: jdbc:postgresql://postgres:5432/mydatabase
+            - name: SPRING_DATASOURCE_USERNAME
+              value: user
+            - name: SPRING_DATASOURCE_PASSWORD
+              value: password

Diff for: service.yaml renamed to app-service.yaml

@@ -1,15 +1,12 @@
 apiVersion: v1
 kind: Service
 metadata:
-  name: spring-boot-service
+  name: spring-boot-app
 spec:
   type: NodePort
-  selector:
-    app: spring-boot-app
   ports:
-    - protocol: TCP
-      port: 8080
+    - port: 8080
       targetPort: 8080
-      nodePort: 30007
-
-
+      nodePort: 30001
+  selector:
+    app: spring-boot-app

Diff for: compose.yaml

@@ -6,4 +6,4 @@ services:
       - 'POSTGRES_PASSWORD=password'
       - 'POSTGRES_USER=user'
     ports:
-      - '5432:5432'
+      - '5432'

Diff for: postgres-deployment.yaml

@@ -0,0 +1,33 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: postgres
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: postgres
+  template:
+    metadata:
+      labels:
+        app: postgres
+    spec:
+      containers:
+        - name: postgres
+          image: postgres:latest
+          env:
+            - name: POSTGRES_DB
+              value: mydatabase
+            - name: POSTGRES_PASSWORD
+              value: password
+            - name: POSTGRES_USER
+              value: user
+          ports:
+            - containerPort: 5432
+          volumeMounts:
+            - mountPath: /var/lib/postgresql/data
+              name: postgres-storage
+      volumes:
+        - name: postgres-storage
+          persistentVolumeClaim:
+            claimName: postgres-pvc

Diff for: postgres-service.yaml

@@ -0,0 +1,14 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: postgres
+spec:
+  type: NodePort
+  ports:
+    - port: 5432
+      targetPort: 5432
+      nodePort: 32432
+  selector:
+    app: postgres
+
+

Diff for: postgres-storage.yaml

@@ -0,0 +1,22 @@
+apiVersion: v1
+kind: PersistentVolume
+metadata:
+  name: postgres-pv
+spec:
+  capacity:
+    storage: 1Gi
+  accessModes:
+    - ReadWriteOnce
+  hostPath:
+    path: /data/postgres
+---
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: postgres-pvc
+spec:
+  accessModes:
+    - ReadWriteOnce
+  resources:
+    requests:
+      storage: 1Gi

Diff for: src/main/resources/application.properties

@@ -1,3 +1,14 @@
-spring.application.name=spring-boot-app
+spring.datasource.url=jdbc:postgresql://localhost:5432/mydatabase
+spring.datasource.username=user
+spring.datasource.password=password
+# spring.datasource.driver-class-name=org.postgresql.Driver
+
+# Hibernate settings
+spring.jpa.hibernate.ddl-auto=update
+# spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.PostgreSQLDialect
+
+spring.jpa.show-sql=true
+spring.jpa.properties.hibernate.format_sql=true
+
+# Initialize database
 spring.sql.init.mode=always
-spring.jpa.hibernate.ddl-auto=create

Diff for: src/main/resources/schema.sql

@@ -1,10 +1,9 @@
 DROP TABLE IF EXISTS User; -- don't do this on a production environment
 
 CREATE TABLE User (
-    id varchar(255) NOT NULL,
+    id SERIAL PRIMARY KEY,
     name varchar(255) NOT NULL,
-    email varchar(255) NOT NULL,
-    PRIMARY KEY (id)
+    email varchar(255) NOT NULL
 );
 
 INSERT INTO User