kubernetes安装并启动mysql示例

比眉伴天荒 2022-04-10 07:11 420阅读 0赞

# kubernetes安装并启动mysql示例 #

1.  安装kubernetes

# systemctl disable firewalld
    # systemctl stop firewalld
    # yum -y install etcd kubernetes
    # vim /etc/sysconfig/docker
    OPTIONS='--selinux-enabled=false --insecure-registry gcr.io'

# vim /etc/kubernetes/apiserver

删除`--admission-control参数中ServiceAccount`

# systemctl start etcd
    # systemctl start docker
    # systemctl start kube-apiserver
    # systemctl start kube-controller-manager
    # systemctl start kube-scheduler
    # systemctl start kubelet
    # systemctl start kube-proxy

1.  创建pod时报错

apiVersion: v1
    kind: ReplicationController
    metadata: 
      name: mysql
    spec:
      replicas: 1
      selector:
        app: mysql
      template:
        metadata:
          labels:
            app: mysql
        spec:
          containers:
          - name: mysql
            image: mysql
            ports: 
            - containerPort: 3306
            env:
            - name: MYSQL_ROOT_PASSWORD
              value: "123456"

kubectl create -f mysql-rc.yaml

Error syncing pod a3b95e2a-1a9a-11e8-812e-fa163ee5df35, skipping: failed to "StartContainer" for "POD" with ErrImagePull: "image pull failed for registry.access.redhat.com/rhel7/pod-infrastructure:latest, this may be because there are no credentials on this request.  details: (open /etc/docker/certs.d/registry.access.redhat.com/redhat-ca.crt: no such file or directory)”

# yum install *rhsm* -y

依旧报错

原因是docker镜像拉取有问题

vim /etc/docker/daemon.json 
     ```
     ```
    {
       "registry-mirrors": ["https://registry.docker-cn.com"]      
    }

替换为国内仓库   
重启docker

# systemctl daemon-reload
    # systemctl restart docker

问题解决，pod创建完成   
3. 创建service

apiVersion: v1
    kind: Service
    metadata: 
      name: mysql1
    spec:
      type: NodePort
      ports:
        - port: 3307
          nodePort: 32307
          targetPort: 3306
      selector: 
        app: mysql

Kubectl create -f mysql-svc.yaml

查看状态

# kubectl get po
    NAME          READY     STATUS    RESTARTS   AGE
    mysql-7hv93   1/1       Running   0          16m
    
    
    # kubectl get svc
    NAME         CLUSTER-IP      EXTERNAL-IP   PORT(S)          AGE
    kubernetes   10.254.0.1      <none>        443/TCP          18m
    mysql1       10.254.167.91   <nodes>       3307:32307/TCP   16m
    
    # lsof -i:32307
    COMMAND     PID USER   FD   TYPE  DEVICE SIZE/OFF NODE NAME
    kube-prox 30418 root    9u  IPv6 1166802      0t0  TCP *:32307 (LISTEN)

连接主机ip加32307端口，访问mysql成功