Deploy MySQL source and replica servers in k8s 在 k8s 集群中部署MySQL主从server

k8s-mysql-source-replica.yaml

# applied under the namespace "ms"
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: mysql
spec:
  selector:
    matchLabels:
      app: mysql
  serviceName: mysql
  replicas: 3
  template:
    metadata:
      labels:
        app: mysql
    spec:
      # imagePullSecrets:
      # - name: regcred
      containers:
      - name: mysql
        image: mysql:8.0
        # image: ccr.ccs.tencentyun.com/fxck/mysql:8.0
        command:
        - bash
        - -c
        - exec /usr/local/bin/docker-entrypoint.sh mysqld --server-id ${SERVER_ID}
        ports:
        - containerPort: 3306
          name: mysql
        env:
        - name: MYSQL_ROOT_PASSWORD
          valueFrom:
            secretKeyRef:
              name: mysql-credentials
              key: mysql-root-password
        - name: POD_INDEX
          valueFrom:
            fieldRef:
              fieldPath: metadata.labels['apps.kubernetes.io/pod-index']
        volumeMounts:
        - name: mysql-conf
          mountPath: /etc/my.cnf
          subPath: my.cnf
      volumes:
      - name: mysql-conf
        configMap:
          name: mysql-conf-v1
          items:
          - key: my.cnf
            path: my.cnf
---
apiVersion: v1
kind: Service
metadata:
  name: mysql
spec:
  selector:
    app: mysql
  clusterIP: None
  type: ClusterIP
---
apiVersion: v1
kind: ConfigMap
metadata:
  name: mysql-conf-v1
data:
  my.cnf: |
    [mysqld]
    log_bin = mysql-bin # 打开binlog
    skip-host-cache
    # skip-name-resolve # 注释掉这个之后才能用域名作为用户名连接DB
    datadir=/var/lib/mysql
    socket=/var/run/mysqld/mysqld.sock
    secure-file-priv=/var/lib/mysql-files
    user=mysql
    pid-file=/var/run/mysqld/mysqld.pid

    [client]
    socket=/var/run/mysqld/mysqld.sock
    !includedir /etc/mysql/conf.d/
---
apiVersion: v1
kind: Secret
metadata:
  name: mysql-credentials
type: Opaque
data:
  mysql-root-password: WTB1clA0c3N3MHJk

replica.sql

-- 在从服务器，也就是replica上执行以下语句。
-- 需要根据实际的k8s namespace填写下面的域名
change replication source to
source_user='repl',
source_password='Y0urP4ssw0rd',
source_host='mysql-0.mysql.ms.svc.cluster.local';

start replica;

source.sql

-- 在主服务器，也就是source上执行以下语句
-- 需要根据实际的k8s namespace填写下面的域名
create user 'repl'@'%.mysql.ms.svc.cluster.local' identified by 'Y0urP4ssw0rd';
grant replication slave on *.* to 'repl'@'%.mysql.ms.svc.cluster.local';

flush privileges;