helm一鍵 安裝mariadb-ha（詳細）

一、

 

二、單機安裝一主一從

　　先創建對應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、安裝mysql

　　#修改密碼和修改主庫的pvc，默認都有pvc

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

 

      #啟動后查看pod容器日志，提示沒權限創建目錄或初始化失敗，需要修改宿主目錄的權限為1001，因為容器默認以1001的用戶啟動

　  chown 1001:root /opt/mariadb-master

      chown 1001:root /opt/mariadb-slave

 　 kubectl get all查看是否成功

 

四、安裝成功后,測試

查看mysql密碼

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

#啟動客戶端測試
kubectl run mariadb-ha-client --rm --tty -i --restart='Never' --image docker.io/bitnami/mariadb:10.1.38 --namespace default --command -- bash
#連接mysql server
mysql -h mariadb-ha.default.svc.cluster.local -uroot -pdu123456
#創建表

create table test(
id int
);

 

五、擴容一台從庫

5.1 先創建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 創建values

　　mysql-ha-values-upgrade.yaml

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

5.3授權目錄

   chown 1001:root /opt/mariadb-slave02

5.4更新

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