Centos7通过Kubernetes+GlusterFS部署wordpress+mysql

素颜马尾好姑娘i 2022-06-02 09:54 227阅读 0赞

# 操作环境 #

网络拓扑图

![SouthEast][]

CentOS Linux release 7.4.1708 (Core)

docker

Client:
     Version:         1.12.6
     API version:     1.24
     Package version: docker-1.12.6-68.gitec8512b.el7.centos.x86_64
     Go version:      go1.8.3
     Git commit:      ec8512b/1.12.6
     Built:           Mon Dec 11 16:08:42 2017
     OS/Arch:         linux/amd64
    
    Server:
     Version:         1.12.6
     API version:     1.24
     Package version: docker-1.12.6-68.gitec8512b.el7.centos.x86_64
     Go version:      go1.8.3
     Git commit:      ec8512b/1.12.6
     Built:           Mon Dec 11 16:08:42 2017
     OS/Arch:         linux/amd64

kubernetes

Kubernetes v1.5.2

glusterfs

glusterfs 3.12.3

# 操作步骤 #

这里的配置步骤都是基于前几篇文章来的，就不详细说明了

[《 Centos7 下Kubernetes集群安装部署》][Centos7 _Kubernetes]

[《Centos7 下Kubernetes配置flannel网络》][Centos7 _Kubernetes_flannel]

[《Centos7下Kubernetes配置使用GlusterFS》][Centos7_Kubernetes_GlusterFS]

[《Centos7下Kubernetes配置DNS》][Centos7_Kubernetes_DNS]

## PV&PVC配置 ##

1.编写mysql pv yaml文件如下：

[root@k8s-master yaml]# vi glusterfs-pv.yaml 
    apiVersion: v1
    kind: PersistentVolume
    metadata:
      name: wordpress-mysql
      labels:
        name: mysql
    
    spec:
      capacity:
        storage: 20Gi
      accessModes:
        - ReadWriteMany
      glusterfs:
        endpoints: "glusterfs-cluster"
        path: "mysql-volume"
        readOnly: false

2.编写mysql pvc yaml文件如下：

[root@k8s-master yaml]# vi glusterfs-pvc.yaml 
    apiVersion: v1
    kind: PersistentVolumeClaim
    metadata:
      name: wordpress-mysql-pvc
    spec:
      accessModes:
        - ReadWriteMany
      resources:
        requests:
          storage: 20Gi
      selector:
        matchLabels:
          name: "mysql"

3.启动上述2 文件

[root@k8s-master yaml]# kubectl apply -f glusterfs-pv.yaml 
    persistentvolume "wordpress-mysql" configured
    [root@k8s-master yaml]# kubectl apply -f glusterfs-pvc.yaml 
    persistentvolumeclaim "wordpress-mysql-pvc" configured

4.编写wordpress pv & pvc yaml配置文件，这里将2个写在一起

[root@k8s-master yaml]# vi wordpress-pvc.yaml 
    apiVersion: v1
    kind: PersistentVolume
    metadata:
      name: wordpress-html
      labels:
        name: html
    
    spec:
      capacity:
        storage: 20Gi
      accessModes:
        - ReadWriteMany
      glusterfs:
        endpoints: "glusterfs-cluster"
        path: "mysql-volume"
        readOnly: false
    ---
    apiVersion: v1
    kind: PersistentVolumeClaim
    metadata:
      name: wordpress-html-pvc
    spec:
      accessModes:
        - ReadWriteMany
      resources:
        requests:
          storage: 20Gi
      selector:
        matchLabels:
          name: "html"

5.启动上述文件

[root@k8s-master yaml]# kubectl apply -f wordpress-pvc.yaml 
    persistentvolume "wordpress-html" configured
    persistentvolumeclaim "wordpress-html-pvc" configured

6.查看pv&pvc状态

[root@k8s-master yaml]# kubectl get pv
    NAME                  CAPACITY   ACCESSMODES   RECLAIMPOLICY   STATUS    CLAIM                         REASON    AGE
    gluster-dev-volume1   10Gi       RWX           Retain          Bound     default/glusterfs-mysql1                1d
    wordpress-html        20Gi       RWX           Retain          Bound     default/wordpress-html-pvc              23h
    wordpress-mysql       20Gi       RWX           Retain          Bound     default/wordpress-mysql-pvc             23h
    [root@k8s-master yaml]# kubectl get pvc
    NAME                  STATUS    VOLUME                CAPACITY   ACCESSMODES   AGE
    glusterfs-mysql1      Bound     gluster-dev-volume1   10Gi       RWX           1d
    wordpress-html-pvc    Bound     wordpress-html        20Gi       RWX           23h
    wordpress-mysql-pvc   Bound     wordpress-mysql       20Gi       RWX           23h

## mysql配置 ##

1.设置mysql 秘钥

[root@k8s-master yaml]# kubectl create secret generic mysql-pass --from-literal=password=root123456

查看秘钥

[root@k8s-master yaml]# kubectl get secret 
    NAME         TYPE      DATA      AGE
    mysql-pass   Opaque    1         23h

2.编写mysql yaml文件如下，注意claimName为mysql pvc的名称

[root@k8s-master yaml]# vi mysql-deployment-2.yaml 
    apiVersion: v1
    kind: Service
    metadata:
      name: wordpress-mysql
      labels:
        app: wordpress
    spec:
      ports:
        - port: 3306
      selector:
        app: wordpress
        tier: mysql
      clusterIP: None
    ---
    apiVersion: extensions/v1beta1 # for versions before 1.8.0 use apps/v1beta1
    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: docker.io/mysql
            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: wordpress-mysql-pvc

3.创建mysql

[root@k8s-master yaml]# kubectl apply -f mysql-deployment-2.yaml 
    service "wordpress-mysql" configured
    deployment "wordpress-mysql" configured

## wordpress配置 ##

1.编写wordpress yaml文件如下

[root@k8s-master yaml]# vi wordpress-deployment.yaml 
    apiVersion: v1
    kind: Service
    metadata:
      name: wordpress
      labels:
        app: wordpress
    spec:
      ports:
        - port: 80
      selector:
        app: wordpress
        tier: frontend
      type: LoadBalancer
    ---
    apiVersion:  extensions/v1beta1 
    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: docker.io/wordpress
            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: wordpress-html-pvc

2.启动wordpress

[root@k8s-master yaml]# kubectl apply -f wordpress-deployment.yaml 
    service "wordpress" configured
    deployment "wordpress" configured

3.查看mysql&wordpress状态

[root@k8s-master yaml]# kubectl get deployment 
    NAME              DESIRED   CURRENT   UP-TO-DATE   AVAILABLE   AGE
    wordpress         1         1         1            1           2h
    wordpress-mysql   1         1         1            1           2h
    [root@k8s-master yaml]# kubectl get services
    NAME                CLUSTER-IP       EXTERNAL-IP   PORT(S)        AGE
    glusterfs-cluster   172.17.62.135    <none>        1/TCP          1d
    kubernetes          10.254.0.1       <none>        443/TCP        7d
    redis-master        172.17.188.179   <none>        6379/TCP       1h
    wordpress           172.17.110.149   <pending>     80:30503/TCP   2h
    wordpress-mysql     None             <none>        3306/TCP       2h
    [root@k8s-master yaml]# kubectl get pod -o wide
    NAME                               READY     STATUS    RESTARTS   AGE       IP            NODE
    busybox                            1/1       Running   1          1h        172.17.17.3   10.10.200.229
    wordpress-2685813842-2pqw1         1/1       Running   0          2h        172.17.17.5   10.10.200.229
    wordpress-mysql-3121681020-d35tb   1/1       Running   0          2h        172.17.17.4   10.10.200.229

4.访问http://10.10.200.229:30503，就可以进入wordpress界面了

![SouthEast 1][]

[SouthEast]: /images/20220602/476e5006d6a9460794c982ddaf679fe4.png
[Centos7 _Kubernetes]: http://blog.csdn.net/bobpen/article/details/78958675
[Centos7 _Kubernetes_flannel]: http://blog.csdn.net/bobpen/article/details/78981943
[Centos7_Kubernetes_GlusterFS]: http://blog.csdn.net/bobpen/article/details/79003469
[Centos7_Kubernetes_DNS]: http://blog.csdn.net/bobpen/article/details/79022249
[SouthEast 1]: /images/20220602/b69c081dbb2b44cf91c13f8d8be8dc06.png