kubernetea Labs

Lab 1 : Replicaset lab

apiVersion: apps/v1
kind: ReplicaSet
metadata:
  namespace: yourname
  name: frontend
  labels:
    app: guestbook
    tier: frontend
spec:
  # modify replicas according to your case
  replicas: 3
  selector:
    matchLabels:
      tier: frontend
  template:
    metadata:
      labels:
        tier: frontend
    spec:
      containers:
      - name: php-redis
        image: gcr.io/google_samples/gb-frontend:v3

Lab 2 : Create Statfulset for mySQl DB with PVC and Secret

Step 1: Create secret with password

• Step 1 : Encrypte password with base64

echo -n 'devops' | base64

• Step 2: Create secret with password

apiVersion: v1
kind: Secret
metadata:
  namespace: yourname
  name: mysql-pass
type: Opaque
data:
  password: ZGV2b3Bz

• Step 3: Create PVC to store mysql db

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  namespace: yourname
  name: mysql-pv-claim
  labels:
    app: wordpress
spec:
  accessModes:
   - ReadWriteOnce
  resources:
   requests:
    storage: 40Gi

• Step 4: Create Statefulset for MySql DB

apiVersion: apps/v1
kind: StatefulSet
metadata:
  namespace: yourname
  name: wordpress-mysql
  labels:
    app: wordpress
spec:
  selector:
    matchLabels:
      app: wordpress
      tier: mysql
  template:
    metadata:
      labels:
        app: wordpress
        tier: mysql
    spec:
      containers:
        - image: mysql:5.6
          name: mysql
          env:
            - name: MYSQL_ROOT_PASSWORD
              valueFrom:
                secretKeyRef:
                  name: mysql-pass
                  key: password
          ports:
            - containerPort: 3306
              name: mysql
          volumeMounts:
            - name: mysql-persistent-storage
              mountPath: /var/lib/mysql
      volumes:
        - name: mysql-persistent-storage
          persistentVolumeClaim:
            claimName: mysql-pv-claim

• Step 5: Expose DB service port 3306

apiVersion: v1
kind: Service
metadata:
  namespace: yourname
  name: wordpress-mysql
  labels:
    app: wordpress
spec:
  ports:
    - port: 3306
  selector:
    app: wordpress
    tier: mysql