新添加MySQL Pod（mysql-4 Pod）

新物理机如何加入K8s集群，详细信息请参见《Kubernetes 1.18.20 部署指南（CentOS&openEuler）》。

  1. 修改master节点物理机上的mysql_deployment.yaml配置文件。

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    vim mysql_deployment.yaml

  2. 按“i”进入编辑模式，添加新Pod部署，修改内容如下：

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    ......
---
apiVersion: v1
kind: Pod
metadata:
  name: mysql-1
......
  hostAliases:
  ......
  - ip: "10.99.0.18"
    hostnames:
    - "mysql-4"
......
---
apiVersion: v1
kind: Pod
metadata:
  name: mysql-2
......
  hostAliases:
  ......
  - ip: "10.99.0.18"
    hostnames:
    - "mysql-4"
......
---
apiVersion: v1
kind: Pod
metadata:
  name: mysql-3
......
  hostAliases:
  ......
  - ip: "10.99.0.18"
    hostnames:
    - "mysql-4"
......
---
apiVersion: v1
kind: Pod
metadata:
  labels:
    app: mysql-4
  name: mysql-4
  namespace: ns-mysql-test
  annotations:
    ovn.kubernetes.io/ip_address: 10.99.0.18
    ovn.kubernetes.io/mac_address: 00:00:00:53:6B:B9
spec:
  nodeSelector:
    test: "mysql-test-4"
  hostAliases:
  - ip: "10.99.0.15"
    hostnames:
    - "mysql-1"
  - ip: "10.99.0.16"
    hostnames:
    - "mysql-2"
  - ip: "10.99.0.17"
    hostnames:
    - "mysql-3"
  - ip: "10.99.0.18"
    hostnames:
    - "mysql-4"
  containers:
  - name: mysql-4
    image: mymysql/centos8-mysql-arm:8.0.19
    resources:
      limits:
        cpu: 16
        memory: 64Gi
    ports:
    - name: mysql-port
      containerPort: 3306
    - name: copy-port
      containerPort: 33061
    env:
    - name: MYSQL_ROOT_PASSWORD
      value: test123
    - name: MYSQL_ROOT_HOST
      value: "%"
    volumeMounts:
    - name: mysql-data
      mountPath: "/data/mysql/data"
    - name: mysql-log
      mountPath: "/data/mysql/log"
    - name: mysql-run
      mountPath: "/data/mysql/run"
    - name: mysql-tmp
      mountPath: "/data/mysql/tmp"
    - name: mysql-cnf
      mountPath: "/etc/my.cnf"
  volumes:
  - name: mysql-data
    hostPath:
      path: "/data/mysql/mysql_4/data"
      type: DirectoryOrCreate
  - name: mysql-log
    hostPath:
      path: "/data/mysql/mysql_4/log"
      type: DirectoryOrCreate
  - name: mysql-run
    hostPath:
      path: "/data/mysql/mysql_4/run"
      type: DirectoryOrCreate
  - name: mysql-tmp
    hostPath:
      path: "/data/mysql/mysql_4/tmp"
      type: DirectoryOrCreate
  - name: mysql-cnf
    hostPath:
      path: "/data/mysql/mysql_4/mysql_arm.cnf"
      type: FileOrCreate
......
---
apiVersion: v1
kind: Service
metadata: 
  name: mysql-4-service
  namespace: ns-mysql-test
spec:
  type: NodePort
  selector:
    app: mysql-4
  ports:
    - name: dbport
      protocol: TCP
      port: 3306
      targetPort: 3306
      nodePort: 30004
    - name: cpport
      protocol: TCP
      port: 33061
      targetPort: 33061
      nodePort: 30064

  3. 按“Esc”键，输入:wq!，按“Enter”保存并退出编辑。

如上yaml修改：

  1. 在其他MySQL Pod的hostAliases中增加了mysql-4的主机名解析（MySQL MGR群组组建过程中将用到该解析规则）。
  2. 在文件中添加了mysql-4的Pod部署配置，与其他MySQL Pod保持相同名称空间，IP地址、MAC、数据目录挂载的物理机目录不与其他Pod冲突。
  3. 在文件中添加了mysql-4-service的Service部署，类型为NodePort，将mysql-4的3306、33061端口分别映射到了物理机的30004、33064端口。
  4. 其他配置与mysql-1、mysql-2、mysql-3类似。
    • 物理机节点打nodeSelector对应的标签操作与准备mysql-4的配置文件与mysql-1、mysql-2、mysql-3类似，请参见准备K8s部署MySQL的yaml文件和准备MySQL配置文件。
    • 配置修改完成后，在K8s master节点物理机上执行kubectl apply -f ./mysql_deployment.yaml生效配置修改，详细信息请参见修改部署。
父主题： K8s MySQL MGR维护