MySQL 部署¶

简介¶

MySQL 是最流行的关系型数据库管理系统，在 WEB 应用方面 MySQL 是最好的 RDBMS(Relational Database Management System：关系数据库管理系统)应用软件之一。

前提条件¶

已部署 Kubernetes 集群，未部署可参考 Kubernetes 部署
已部署 nfs-subdir-external-provisioner，未部署可参考 Kubernetes Storage

基础信息及兼容¶

名称	描述
MySQL 版本	8.0
支持集群版本	1.18+
是否支离线安装	是
支持架构	amd64/arm64

部署默认配置信息¶


默认地址	mysql.middleware
默认端口	3306
默认账号	root/rootPassw0rd

安装¶

注意

创建管理员账号（必须是管理员账号，后续安装初始化需要用此账号去创建和初始化各应用 DB，若需要远程连接需自行开启）

如果部署不成功，可以使用docker部署mysql的方式进行部署

高亮部分中的 storageClassName 需根据实际情况而定

请务必修改 MySQL 管理员账号

保存 mysql.yaml ，并部署。

mysql.yaml(单击点开)

---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  annotations:
    volume.beta.kubernetes.io/storage-provisioner: "kubernetes.io/nfs"
  #  volume.beta.kubernetes.io/storage-class: "managed-nfs-storage"
  name: mysql-data
  namespace: middleware
spec:
  accessModes:
  - ReadWriteOnce
  volumeMode: Filesystem
  resources:
    requests:
      storage: 10Gi
  storageClassName:  standard-nfs-storage ## 指定实际存在StorageClass #


---
apiVersion: v1
kind: ConfigMap
metadata:
  name: mysql-config
  namespace: middleware
  labels:
    app: mysql
data:
  mysqld.cnf: |-
        [mysqld]
        pid-file        = /var/run/mysqld/mysqld.pid
        socket          = /var/run/mysqld/mysqld.sock
        datadir         = /var/lib/mysql
        symbolic-links=0
        max_connections=5000



---
apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: mysql
  name: mysql
  namespace: middleware
spec:
  progressDeadlineSeconds: 600
  replicas: 1
  revisionHistoryLimit: 2
  selector:
    matchLabels:
      app: mysql
  strategy:
    rollingUpdate:
      maxSurge: 25%
      maxUnavailable: 25%
    type: RollingUpdate
  template:
    metadata:
      labels:
        app: mysql
    spec:
      containers:
      - env:
        - name: MYSQL_ROOT_PASSWORD
          value: rootPassw0rd
        - name: MYSQL_DATABASE
          value: FT2.0
        - name: MYSQL_USER
          value: admin
        - name: MYSQL_PASSWORD
          value: admin@123
        image: pubrepo.guance.com/googleimages/mysql:8.0
        imagePullPolicy: IfNotPresent
        name: mysql
        resources:
           limits:
             cpu: '4'
             memory: 4Gi
           requests:
             cpu: 100m
             memory: 512Mi                   
        ports:
        - containerPort: 3306
          name: dbport
          protocol: TCP
        terminationMessagePath: /dev/termination-log
        terminationMessagePolicy: File
        volumeMounts:
        - mountPath: /var/lib/mysql
          name: db
          subPath: data
        - mountPath: /etc/mysql/conf.d/mysqld.cnf
          name: config
          subPath: mysqld.cnf
      dnsPolicy: ClusterFirst
      restartPolicy: Always
      schedulerName: default-scheduler
      securityContext: {}

      terminationGracePeriodSeconds: 30
      volumes:
      - name: db
        persistentVolumeClaim:
          claimName: mysql-data
      - name: config
        configMap:
          name: mysql-config
---
apiVersion: v1
kind: Service
metadata:
  name: mysql
  namespace: middleware
spec:
  ports:
  - name: mysqlport
    nodePort: 32306
    port: 3306
    protocol: TCP
    targetPort: dbport
  selector:
    app: mysql
  sessionAffinity: None
  type: NodePort

执行命令安装：

kubectl create namespace middleware
kubectl apply -f mysql.yaml

验证部署¶

查看 pod 状态

kubectl get pods -n middleware | grep mysql

如何卸载¶

kubectl delete -f mysql.yaml