k8s官方案例：部署WordPress+MySql个人博客

k8s官方案例：部署WordPress+MySql个人博客

步骤：

• 创建PersistentVolumeClaims(PVC)和PersistentVolume(PV)
• 创建Secret（注入MySql密码等）
• 部署MySQL容器组（Deployment）
• 部署WordPress容器组（Deployment）

创建PersistentVolumeClaims(PVC)和PersistentVolume(PV)

MySQL和WordPress都使用持久存储(PV)来存储数据。这里我们使用基于rook-ceph项目提供的RBD块存储（存储池），为MySQL和WordPress动态创建PV。rook-ceph部署上篇博客。

apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
   name: mywordpress
   # StorageClass的名字，pvc调用时填的名字
provisioner: ceph.rook.io/block
parameters:
  pool: replicapool
  # Specify the namespace of the rook cluster from which to create volumes.
  # If not specified, it will use `rook` as the default namespace of the cluster.
  # This is also the namespace where the cluster will be
  clusterNamespace: rook-ceph
  # Specify the filesystem type of the volume. If not specified, it will use `ext4`.
  fstype: xfs
# 设置回收策略默认为：Retain
reclaimPolicy: Retain
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: mysql-pv-claim
  labels:
    app: wordpress
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 20Gi
  storageClassName: mywordpress

创建资源对象

kubectl apply -f mywordpress-storageclass-pvc.yaml

指定一个Secret变量存放MySQL密码

Secrets用于存放敏感密码等数据，跟ConfigMap的配置方式极其相似。

kubectl create secret generic mysql-pass --from-literal=password=YOUR_PASSWORD

部署MySQL

1. 官方配置文件部署mysql容器组

   kubectl create -f https://k8s.io/examples/application/wordpress/mysql-deployment.yaml
   

2. 附官方yaml清单文件：

   apiVersion: v1
   kind: Service
   metadata:
     name: wordpress-mysql
     labels:
       app: wordpress
   spec:
     ports:
       - port: 3306
     selector:
       app: wordpress
       tier: mysql
     clusterIP: None
   ---
   apiVersion: v1
   kind: PersistentVolumeClaim
   metadata:
     name: mysql-pv-claim
     labels:
       app: wordpress
   spec:
     accessModes:
       - ReadWriteOnce
     resources:
       requests:
         storage: 20Gi
   ---
   apiVersion: apps/v1 # for versions before 1.9.0 use apps/v1beta2
   kind: Deployment
   metadata:
     name: wordpress-mysql
     labels:
       app: wordpress
   spec:
     selector:
       matchLabels:
         app: wordpress
         tier: mysql
     strategy:
       type: Recreate
     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
   

部署WordPress

1. 官方配置文件部署wordpress容器组

   kubectl create -f https://k8s.io/examples/application/wordpress/wordpress-deployment.yaml
   

2. 附g官方yanl清单文件

   apiVersion: v1
   kind: Service
   metadata:
     name: wordpress
     labels:
       app: wordpress
   spec:
     type: NodePort
     ports:
       - port: 80
         nodePort: 8090
     selector:
       app: wordpress
       tier: frontend
   ---
   apiVersion: v1
   kind: PersistentVolumeClaim
   metadata:
     name: wp-pv-claim
     labels:
       app: wordpress
   spec:
     accessModes:
       - ReadWriteOnce
     resources:
       requests:
         storage: 20Gi
   ---
   apiVersion: apps/v1 # for versions before 1.9.0 use apps/v1beta2
   kind: Deployment
   metadata:
     name: wordpress
     labels:
       app: wordpress
   spec:
     selector:
       matchLabels:
         app: wordpress
         tier: frontend
     strategy:
       type: Recreate
     template:
       metadata:
         labels:
           app: wordpress
           tier: frontend
       spec:
         containers:
         - image: wordpress:4.8-apache
           name: wordpress
           env:
           - name: WORDPRESS_DB_HOST
             value: wordpress-mysql
           - name: WORDPRESS_DB_PASSWORD
             valueFrom:
               secretKeyRef:
                 name: mysql-pass
                 key: password
           ports:
           - containerPort: 80
             name: wordpress
           volumeMounts:
           - name: wordpress-persistent-storage
             mountPath: /var/www/html
         volumes:
         - name: wordpress-persistent-storage
           persistentVolumeClaim:
             claimName: wp-pv-claim
   

   浏览器访问http://node_ip:8090