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Simple WordPress setup with MySQL on K3s

Simple setup. 1 replica WordPress + 1 replica MySQL with PVC on K3s and expose it to LAN by LoadBalancer.

Create deployment MySQL​

nano mysql.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: mysql
  labels:
    app: mysql
spec:
  replicas: 1
  selector:
    matchLabels:
      app: mysql
  template:
    metadata:
      labels:
        app: mysql
    spec:
      containers:
      - name: mysql
        image: mysql:8
        env:
        - name: MYSQL_ROOT_PASSWORD
          value: rootpassword
        - name: MYSQL_DATABASE
          value: wordpress
        - name: MYSQL_USER
          value: wpuser
        - name: MYSQL_PASSWORD
          value: wppassword
        ports:
        - containerPort: 3306
        volumeMounts:
        - name: mysql-pvc
          mountPath: /var/lib/mysql
      volumes:
      - name: mysql-pvc
        persistentVolumeClaim:
          claimName: mysql-pvc
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: mysql-pvc
spec:
  accessModes:
  - ReadWriteOnce
  resources:
    requests:
      storage: 10Gi
---
apiVersion: v1
kind: Service
metadata:
  name: mysql
spec:
  type: LoadBalancer
  ports:
  - port: 3306
    targetPort: 3306
  selector:
    app: mysql

Create deployment WordPress​

nano wp.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: wordpress
  labels:
    app: wordpress
spec:
  replicas: 1
  selector:
    matchLabels:
      app: wordpress
  template:
    metadata:
      labels:
        app: wordpress
    spec:
      containers:
      - name: wordpress
        image: wordpress:latest
        ports:
        - containerPort: 80
        env:
        - name: WORDPRESS_DB_HOST
          value: mysql
        - name: WORDPRESS_DB_USER
          value: wpuser
        - name: WORDPRESS_DB_PASSWORD
          value: wppassword
        - name: WORDPRESS_DB_NAME
          value: wordpress
        volumeMounts:
        - name: wordpress-pvc
          mountPath: /var/www/html
      volumes:
      - name: wordpress-pvc
        persistentVolumeClaim:
          claimName: wordpress-pvc
---
apiVersion: v1
kind: Service
metadata:
  name: wordpress
spec:
  type: LoadBalancer
  selector:
    app: wordpress
  ports:
  - port: 80
    targetPort: 80

Create PVC for WordPress​

nano pvc.yaml
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: wordpress-pvc
spec:
  accessModes:
  - ReadWriteOnce
  resources:
    requests:
      storage: 10Gi

Deploy all resources​

kubectl apply -f pvc.yaml
kubectl apply -f mysql.yaml
kubectl apply -f wp.yaml