在Kubernetes上创建MySQL容器时如何初始化? [英] How to initialize mysql container when created on Kubernetes?

问题描述

我想在容器的MySQL上设置初始数据. 在docker-compose.yml中，此类代码可以在运行容器时创建初始数据.

I want to set initial data on MySQL of container. In docker-compose.yml, such code can create initial data when running container.

volumes:
  - db:/var/lib/mysql
  - "./docker/mysql/conf.d:/etc/mysql/conf.d"
  - "./docker/mysql/init.d:/docker-entrypoint-initdb.d"

但是，如何在运行时在Kubernetes上创建初始数据?

However, how can I create initial data on Kubernetes when running?

推荐答案

根据MySQL Docker映像自述文件，与容器启动时的数据初始化有关的部分是确保将所有初始化文件都安装到容器的/docker-entrypoint-initdb.d文件夹中.

According to the MySQL Docker image README, the part that is relevant to data initialization on container start-up is to ensure all your initialization files are mount to the container's /docker-entrypoint-initdb.d folder.

您可以在ConfigMap中定义初始数据，然后将相应的卷安装到pod中，如下所示:

You can define your initial data in a ConfigMap, and mount the corresponding volume in your pod like this:

apiVersion: extensions/v1beta1
kind: Pod
metadata:
  name: mysql
spec:
  containers:
  - name: mysql
    image: mysql        
    ports:
      - containerPort: 3306
    volumeMounts:
      - name: mysql-initdb
        mountPath: /docker-entrypoint-initdb.d
  volumes:
    - name: mysql-initdb
      configMap:
        name: mysql-initdb-config
---
apiVersion: v1
kind: ConfigMap
metadata:
  name: mysql-initdb-config
data:
  initdb.sql: |
    CREATE TABLE friends (id INT, name VARCHAR(256), age INT, gender VARCHAR(3));
    INSERT INTO friends VALUES (1, 'John Smith', 32, 'm');
    INSERT INTO friends VALUES (2, 'Lilian Worksmith', 29, 'f');
    INSERT INTO friends VALUES (3, 'Michael Rupert', 27, 'm');

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