mysql - 在 Kubernetes 中向 MySQL 添加另一个用户

Question

这是我的MySQL

apiVersion: apps/v1beta1
kind: Deployment
metadata:
  name: abc-def-my-mysql
  namespace: abc-sk-test
  labels:
    project: abc
    ca: my
spec:
  replicas: 1
  template:
    metadata:
      labels:
        app: abc-def-my-mysql
        project: abc
        ca: my
    spec:
      containers:
      - name: mysql
        image: mysql:5.6
        args: ["--default-authentication-plugin=mysql_native_password", "--ignore-db-dir=lost+found"]
        ports:
        - containerPort: 3306
        env:
        - name: MYSQL_ROOT_PASSWORD
          value: "root"
        - name: MYSQL_DATABASE
          value: "my_abc"
        - name: MYSQL_USER
          value: "test_user"
        - name: MYSQL_PASSWORD
          value: "12345"
        volumeMounts:
         - mountPath: /var/lib/mysql
           name: abc-def-my-mysql-storage
      volumes:
      - name: abc-def-my-mysql-storage
        persistentVolumeClaim:
         claimName: abc-def-my-mysql-pvc

我想向 mysql 添加另一个用户，以便真正的用户可以连接到它。而不是使用“test_user”。我怎样才能添加另一个用户，就像在上面的配置中添加任何其他环境变量一样

Answer 1

将“创建用户脚本”挂载到容器的 /docker-entrypoint-initdb.d 目录中。它将在第一个 pod 启动时执行一次。

apiVersion: extensions/v1beta1
kind: Pod
metadata:
  name: mysql
spec:
  containers:
  - name: mysql
    image: mysql
    .....
    env:
    - name: MYSQL_ROOT_PASSWORD
      value: "root"
    .....
    volumeMounts:
      - name: mysql-initdb
        mountPath: /docker-entrypoint-initdb.d
  volumes:
  - name: mysql-initdb
    configMap:
      name: initdb

---
apiVersion: v1
kind: ConfigMap
metadata:
  name: initdb
data:
  initdb.sql: |-
    CREATE USER 'first_user'@'%' IDENTIFIED BY '111' ;
    CREATE USER 'second_user'@'%' IDENTIFIED BY '222' ;

测试:

kubectl exec -it <PODNAME> -- mysql -uroot -p -e 'SELECT user, host FROM mysql.user;'

    +-------------+------+
    | user        | host |
    +-------------+------+
    | first_user  | %    |
    | second_user | %    |
    | root        | %    |
    +-------------+------+

参见 Initializing a fresh instance Mysql Docker Hub 图像:

When a container is started for the first time, a new database with the specified name will be created and initialized with the provided configuration variables. Furthermore, it will execute files with extensions .sh, .sql and .sql.gz that are found in /docker-entrypoint-initdb.d. Files will be executed in alphabetical order.

You can easily populate your mysql services by mounting a SQL dump into that directory and provide custom images with contributed data. SQL files will be imported by default to the database specified by the MYSQL_DATABASE variable.