k8s 映射 外部服务

把外部的服务，通过创建service和endpoint，把它映射到k8s内部来使用。

操作步骤：
在10.0.0.13上安装数据库

yum install mariadb-server -y
systemctl start mariadb.service
systemctl enable mariadb,service

创建数据库的安全初始化
mysql_secure_installation

先回车，再选n，一路y

根据原配置，创建数据库
mysql    #进入数据库
创建数据库
create database wrodpress;

创建远程连接用户
grant all on wordpress.* to wordpress@'%' identified by 'wordpress';

yml文件

[root@k8s-master wordpress]# cat mysql-ep.yml 
apiVersion: v1
kind: Endpoints
metadata:
  name: mysql-wp
  namespace: wordpress
subsets:
- addresses:
  - ip: 10.0.0.13
  ports:
  - port: 3306 
    protocol: TCP

[root@k8s-master wordpress]# cat mysql-svc.yml 
apiVersion: v1
kind: Service
metadata:
  namespace: wordpress
  name: mysql-wp
spec:
  ports:
    - port: 3306
      targetPort: 3306

[root@k8s-master wordpress]# cat wordpress-rc.yml 
apiVersion: v1
kind: ReplicationController
metadata:
  namespace: wordpress
  name: wordpress
spec:
  replicas: 1
  selector:
    app: wordpress
  template:
    metadata:
      labels:
        app: wordpress
    spec:
      volumes:
      - name: wordpress-web  
        nfs:
          path: /data/wordpress-web
          server: 10.0.0.11
      containers:
        - name: wordpress
          image: 10.0.0.11:5000/wordpress:latest 
          ports:
          - containerPort: 80
          volumeMounts:
          - mountPath: /var/www/html
            name: wordpress-web
          env:
          - name: WORDPRESS_DB_HOST 
            value: 'mysql-wp'
          - name: WORDPRESS_DB_USER 
            value: 'wordpress'
          - name: WORDPRESS_DB_PASSWORD
            value: 'wordpress'

[root@k8s-master wordpress]# cat wordpress-svc.yml 
apiVersion: v1
kind: Service
metadata:
  namespace: wordpress
  name: wordpress
spec:
  type: NodePort
  ports:
    - port: 80
      nodePort: 30009
  selector:
    app: wordpress

创建
kubectl create -f .

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