[k8s] 워드프레스 구축

 

master  192.168.122.11

node1  192.168.122.21

node2  192.168.122.22

node3  192.168.122.23

 

1. pod 생성해서 워드프레스 구축하기 

 

pod-wordpress.yml

apiVersion: v1
kind: Pod
metadata:
  name: pod-word
  labels:
    app: pod-word
spec:
  containers:
  - name: pod-word
    image: wordpress:latest
    env:
    - name: WORDPRESS_DB_HOST
      value: "svc-head-db"
    - name: WORDPRESS_DB_USER
      value: "wp-admin"
    - name: WORDPRESS_DB_PASSWORD
      value: "1234"
    - name: WORDPRESS_DB_NAME
      value: "wordpress"
    volumeMounts:
    - name: word-vol
      mountPath: /var/www/html
    ports:
    - containerPort: 80
  volumes:
  - name: word-vol
    persistentVolumeClaim:
      claimName: pvc-word

 

pod-db.yml

apiVersion: v1
kind: Pod
metadata:
  name: pod-db
  labels:
    app: pod-db
spec:
  containers:
  - image: mysql:5.7
    name: pod-db
    env:
    - name: MYSQL_ROOT_PASSWORD
      value: "1234"
    - name: MYSQL_DATABASE
      value: "wordpress"
    - name: MYSQL_USER
      value: "wp-admin"
    - name: MYSQL_PASSWORD
      value: "1234"
    volumeMounts:
    - name: pod-db-vol
      mountPath: /var/lib/mysql
      subPath: mysql
    ports:
    - containerPort: 3306
      protocol: TCP
  volumes:
  - name: pod-db-vol
    persistentVolumeClaim:
      claimName: pvc-db

 

svc-lb-word.yml

apiVersion: v1
kind: Service
metadata:
  name: svc-lb-word
spec:
  type: LoadBalancer
  ports:
  - port: 80
    targetPort: 80
  selector:
    app: pod-word

 

svc-headless-db.yml

apiVersion: v1
kind: Service
metadata:
  name: svc-head-db
spec:
  clusterIP: None
  ports:
  - port: 3306
    targetPort: 3306
  selector:
    app: pod-db

 

pvc-word.yml

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: pvc-word
spec:
  accessModes:
    - ReadWriteMany
  resources:
    requests:
      storage: 1Gi
  storageClassName: csi-cephfs

 

pvc-db.yml

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: pvc-db
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi
  storageClassName: rook-ceph-block

 

$ kubectl create -f svc-lb-word.yml -f svc-headless-db.yml
$ kubectl create -f pvc-word.yml -f pvc-db.yml
$ kubectl create -f pod-wordpress.yml -f pod-db.yml


$ kubectl get service
NAME          TYPE           CLUSTER-IP      EXTERNAL-IP       PORT(S)        AGE
kubernetes    ClusterIP      10.233.0.1      <none>            443/TCP        253d
svc-head-db   ClusterIP      None            <none>            3306/TCP       26m
svc-lb-word   LoadBalancer   10.233.44.252   192.168.122.200   80:31693/TCP   26m


$ kubectl get pv
NAME                                       CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS   CLAIM              STORAGECLASS      REASON   AGE
pvc-6d805d55-2e8f-46cd-a3b9-18386055567e   1Gi        RWX            Delete           Bound    default/pvc-word   csi-cephfs                 18m
pvc-aea9b252-4127-4747-9c82-936e80c7ac42   1Gi        RWO            Delete           Bound    default/pvc-db     rook-ceph-block            18m


$ kubectl get pvc
NAME       STATUS   VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS      AGE
pvc-db     Bound    pvc-aea9b252-4127-4747-9c82-936e80c7ac42   1Gi        RWO            rook-ceph-block   21m
pvc-word   Bound    pvc-6d805d55-2e8f-46cd-a3b9-18386055567e   1Gi        RWX            csi-cephfs        21m

$ kubectl get pod
NAME           READY   STATUS    RESTARTS   AGE
pod/pod-db     1/1     Running   0          21m
pod/pod-word   1/1     Running   0          16m

 

 

*! pod-wordpress.yml 워드프레스 파드에서 env 환경변수 부분은 주석처리 해준 후 생성 -> 주석처리 해체 후 다시 생성 

apiVersion: v1
kind: Pod
metadata:
  name: pod-word
  labels:
    app: pod-word
spec:
  containers:
  - name: pod-word
    image: wordpress:latest
    #env:
    #- name: WORDPRESS_DB_HOST
    #  value: "svc-head-db"
    #- name: WORDPRESS_DB_USER
    #  value: "wp-admin"
    #- name: WORDPRESS_DB_PASSWORD
    #  value: "1234"
    #- name: WORDPRESS_DB_NAME
    #  value: "wordpress"
    volumeMounts:
    - name: word-vol
      mountPath: /var/www/html
    ports:
    - containerPort: 80
  volumes:
  - name: word-vol
    persistentVolumeClaim:
      claimName: pvc-word

주석처리하고 실행했을때 나오는 화면

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2. ReplicaSet 으로 워드프레스 구축하기

 

rs-wordpress.yml

apiVersion: apps/v1
kind: ReplicaSet
metadata:
  name: pod-word
spec:
  replicas: 2
  selector:
    matchLabels:
      app: pod-word
  template:
    metadata:
      labels:
        app: pod-word
    spec:
      containers:
      - image: wordpress
        name: pod-wordpress
        env:
        - name: WORDPRESS_DB_HOST
          value: "db"
          name: WORDPRESS_DB_USER
          value: "admin"
          name: WORDPRESS_DB_PASSWORD
          value: "1234"
          name: WORDPRESS_DB_NAME
          value: "wordpress"
        volumeMounts:
        - name: pod-word-vol
          mountPath: /var/www/html
        ports:
        - containerPort: 80
          protocol: TCP
      volumes:
      - name: pod-word-vol
        persistentVolumeClaim:
          claimName: pvc-word

 

rs-db.yml

apiVersion: apps/v1
kind: ReplicaSet
metadata:
  name: pod-db
  labels:
    app: pod-db
spec:
  replicas: 2
  selector: 
    matchLabels:
      app: pod-db
  template:
    metadata:
      labels:
        app: pod-db
    spec:
      containers:
      - image: mysql:5.7
        name: pod-db
        env:
        - name: MYSQL_ROOT_PASSWORD
          value: "1234"
          name: MYSQL_DATABASE
          value: "wordpress"
          name: MYSQL_USER
          value: "admin"
          name: MYSQL_PASSWORD
          value: "1234"
        volumeMounts:
        - name: pod-db-vol
          mountPath: /var/lib/mysql
          subPath: mysql
        ports:
        - containerPort: 3306
          protocol: TCP
      volumes:
      - name: pod-db-vol
        persistentVolumeClaim:
          claimName: pvc-db