statefulset部署mysql主从

一。主要参考官网任务：

运行一个有状态的应用程序 | Kubernetes

但有一个问题是，无法下载image: gcr.io/google-samples/xtrabackup:1.0

也可以使用 lank8s.cn，他们的对应关系 k8s.gcr.io –> lank8s.cn，gcr.io –> gcr.lank8s.cn

docker pull gcr.lank8s.cn/google-samples/xtrabackup:1.0

二。创建config map、secret

apiVersion: v1
kind: ConfigMap
metadata:
  name: mysql
  namespace: mysql
  labels:
    app: mysql
data:
  master.cnf: |
    [mysqld]
    log-bin=mysqllog
    skip-name-resolve    
  slave.cnf: |
    [mysqld]
    super-read-only
    skip-name-resolve
    log-bin=mysql-bin
    replicate-ignore-db=mysql  

apiVersion: v1
kind: Secret
metadata:
  name: mysql-secret
  namespace: mysql
  labels:
    app: mysql
type: Opaque
data:
  password: MTIzNDU2 # echo -n "123456" | base64

 三。创建pv

使用local-storage本地存储类

kind: StorageClass
apiVersion: storage.k8s.io/v1
metadata:
  name: local-storage
provisioner: kubernetes.io/no-provisioner
volumeBindingMode: WaitForFirstConsumer

预先在每个节点上创建目录/mnt/statefulset/mysql

创建pv，节点亲和配置为每个节点的名称，pod生成后pv将绑定到每个节点

apiVersion: v1
kind: PersistentVolume
metadata:
  name: mysql-pv
spec:
  capacity:
    storage: 5Gi
  volumeMode: Filesystem
  accessModes:
  - ReadWriteOnce
  persistentVolumeReclaimPolicy: Delete
  storageClassName: local-storage
  local:
    path: /mnt/statefulset/mys