k8s部署mysql

（作者：陈玓玏）

一、前置条件
已部署k8s，服务端版本为1.21.14

二、部署mysql

拉取镜像；

docker pull mysql

将账号密码等信息写到configmap，创建configmap；

apiVersion: v1
kind: ConfigMap
metadata:name: mysql-configlabels:app: mysql
data:MYSQL_ROOT_PASSWORD: "123456"

执行下面的命令来创建configmap。mysql默认都是Root用户，所以只填了个密码。

kubectl apply -f  mysql-cm.yaml

持久卷声明，创建pv和pvc，用于数据的持久化存储：

kind: PersistentVolume
apiVersion: v1
metadata:name: mysql-pv-volumelabels:type: localapp: mysql
spec:storageClassName: manualcapacity:storage: 5GiaccessModes:- ReadWriteManyhostPath:path: "/home/mysql/data"
---
kind: PersistentVolumeClaim
apiVersion: v1
metadata:name: mysql-pv-claimlabels:app: mysql
spec:storageClassName: manualaccessModes:- ReadWriteManyresources:requests:storage: 5Gi

执行下面的命令来创建pv及pvc。

kubectl apply -f  mysql-pv-pvc.yaml

创建deployment

apiVersion: apps/v1
kind: Deployment
metadata:name: mysql-deployment
spec:strategy:type: Recreateselector:matchLabels:app: mysqlreplicas: 1template:metadata:labels:app: mysqlspec:containers:- name: mysqlimage: mysql:8.0.32imagePullPolicy: "IfNotPresent"ports:- containerPort: 3306envFrom:- configMapRef:name: mysql-configvolumeMounts:- mountPath: /var/lib/mysqlname: mysqldbvolumes:- name: mysqldbpersistentVolumeClaim:claimName: mysql-pv-claim

kubectl创建deployment。这一步一开始我mountPath搞错了，然后在k8sdashboard上看pod日志才发现哪里错了，所以验证有问题时要注意排查。

创建service

apiVersion: v1
kind: Service
metadata:name: mysql-servicelabels:app: mysql
spec:type: NodePortports:- port: 3306targetPort: 3306protocol: TCPselector:app: mysql

kubectl创建service。