helm一键 安装mariadb-ha（详细）

一、

二、单机安装一主一从

　　先创建对应pv

　　 https://github.com/helm/charts/blob/master/stable/mariadb/templates/master-statefulset.yaml

       mysql-ha-pv00.yaml

apiVersion: v1
kind: PersistentVolume
metadata:
      name: mariadb-master
      labels:
        app: mariadb
spec:
 capacity:
  storage: 10Gi
 accessModes:
  - ReadWriteOnce
 hostPath:
  path: /opt/mariadb-master

　　　mysql-ha-pv01.yaml

apiVersion: v1
kind: PersistentVolume
metadata:
      name: mariadb-slave
      labels:
        app: mariadb
spec:
 capacity:
  storage: 10Gi
 accessModes:
  - ReadWriteOnce
 hostPath:
  path: /opt/mariadb-slave

　　kubectl create -f mysql-ha-pv00.yaml
　　kubectl create -f mysql-ha-pv01.yaml

三、安装mysql

　　#修改密码和修改主库的pvc，默认都有pvc

　helm install --name mariadb-ha --set rootUser.password="123456",replication.password="rep123456"  stable/mariadb

      #启动后查看pod容器日志，提示没权限创建目录或初始化失败，需要修改宿主目录的权限为1001，因为容器默认以1001的用户启动

　  chown 1001:root /opt/mariadb-master

      chown 1001:root /opt/mariadb-slave

 　 kubectl get all查看是否成功

四、安装成功后,测试

查看mysql密码

kubectl get secret --namespace default mariadb-ha -o jsonpath="{.data.mariadb-root-password}" | base64 --decode

#启动客户端测试
kubectl run mariadb-ha-client --rm --tty -i --restart='Never' --image docker.io/bitnami/mariadb:10.1.38 --namespace default --command -- bash
#连接mysql server
mysql -h mariadb-ha.default.svc.cluster.local -uroot -pdu123456
#创建表

create table test(
id int
);

五、扩容一台从库

5.1 先创建pv

　　mysql-ha-pv02.yaml 

apiVersion: v1
kind: PersistentVolume
metadata:
      name: mariadb-slave02
      labels:
        app: mariadb
spec:
 capacity:
  storage: 10Gi
 accessModes:
  - ReadWriteOnce
 hostPath:
  path: /opt/mariadb-slave02

  kubectl create -f  mysql-ha-pv02.yaml 

5.2 创建values

　　mysql-ha-values-upgrade.yaml

slave:
  replicas: 2
rootUser:
  password: 123456
replication:
  password: rep123456

5.3授权目录

   chown 1001:root /opt/mariadb-slave02

5.4更新

helm upgrade -f mysql-ha-values-upgrade.yaml  mariadb-ha stable/mariadb