Kubernetes(K8s)部署WordPress博客

如果您还没有部署K8s集群环境，请查看第一期教程Kubernetes部署

一、创建命名空间

kubectl create ns wordpress

1.查看命名空间

kubectl get ns

二、配置数据库

[root@k8s-master wordpressTest]# vim wordpress-db.yaml

请复制以下内容

apiVersion: apps/v1
kind: Deployment
metadata:
    name: wordpress-db
    namespace: wordpress
spec:
    replicas: 1
    selector:
        matchLabels:
              app: wordpress-db
    template:
        metadata:
            labels:
                app: wordpress-db
        spec:
            containers:
            - name: wordpress-db
              image: mysql:5.7
              imagePullPolicy: IfNotPresent
              env:
              - name: MYSQL_ROOT_PASSWORD
                value: redhat
---
apiVersion: v1
kind: Service
metadata:
    name: wordpress-db
    namespace: wordpress
spec:
    ports:
    - port: 3306
    selector:
        app: wordpress-db

数据库密码为redhat

1.创建数据库容器

[root@k8s-master wordpressTest]# kubectl create -f wordpress-db.yaml 
deployment.apps/wordpress-db created
service/wordpress-db created

2.查看pod

[root@k8s-master wordpressTest]# kubectl get pods -n wordpress
NAME                           READY   STATUS    RESTARTS   AGE
wordpress-db-875865d79-vlcnf   1/1     Running   0          13s	#记住这里的NAME

3.连接数据库，创建用户

[root@k8s-master wordpressTest]# kubectl exec -ti -n wordpress wordpress-db-875865d79-vlcnf -- bash	#中间的wordpress-db-875865d79-vlcnf为上面的NAME

使用root用户登录，密码redhat

bash-4.2# mysql -uroot -predhat

创建名为WordPress的库，密码是redhat，给wpuser给予权限

mysql> create database wordpress charset utf8;
Query OK, 1 row affected (0.00 sec)

mysql> create user 'wpuser'@"%" identified by 'redhat';
Query OK, 0 rows affected (0.01 sec)

mysql> grant all on wordpress.* to 'wpuser'@"%";
Query OK, 0 rows affected (0.00 sec)

mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

mysql>exit;

bash-4.2# exit

三、 部署Wordpress博客

[root@k8s-master wordpressTest]# vim wordpress-deploy.yaml

把下面内容复制进去

apiVersion: apps/v1
kind: Deployment
metadata:
    name: wordpress
    namespace: wordpress
spec:
    replicas: 1
    selector:
        matchLabels:
              app: wordpress
    template:
        metadata:
            labels:
                app: wordpress
        spec:
            containers:
            - name: wordpress
              image: wordpress
              imagePullPolicy: IfNotPresent
              env:
              - name: WORDPRESS_DB_HOST
                value: wordpress-db
              - name: WORDPRESS_DB_USER
                value: wpuser	#刚才创建的用户
              - name: WORDPRESS_DB_PASSWORD
                value: redhat	#数据库密码
              - name: WORDPRESS_DB_NAME
                value: wordpress	#库名
              - name: WORDPRESS_TABLE_PREFIX
                value: wp_
---
apiVersion: v1
kind: Service
metadata:
    name: wordpress
    namespace: wordpress
spec:
    type: NodePort
    ports:
    - port: 80
      nodePort: 30009	#外部端口
    selector:
        app: wordpress

1.创建WordPress容器

[root@k8s-master wordpressTest]# kubectl create -f wordpress-deploy.yaml 
deployment.apps/wordpress created
service/wordpress created

2.查看WordPress在哪个节点上运行

[root@k8s-master wordpressTest]# kubectl get pods -n wordpress -o wide
NAME                           READY   STATUS    RESTARTS   AGE   IP                NODE                   NOMINATED NODE   READINESS GATES
wordpress-59569c76f6-5h8xq     1/1     Running   0          26s   192.168.242.164   k8s-node02.linux.com   <none>           <none>
wordpress-db-875865d79-vlcnf   1/1     Running   0          12m   192.168.201.234   k8s-node01.linux.com   <none>           <none>

WordPress运行在node2节点，数据库运行在node1节点

3.查看端口

[root@k8s-master wordpressTest]# kubectl get svc -n wordpress
NAME           TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)        AGE
wordpress      NodePort    172.16.216.117   <none>        80:30009/TCP   37s
wordpress-db   ClusterIP   172.16.45.191    <none>        3306/TCP       13m

80端口被映射到了30009端口

打开浏览器，输入node2节点的IP+30009端口即可