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README
MulanPSL-2.0

GreatSQL-Docker


介绍

GreatSQL软件相关Docker镜像集。

Dockerfiles可用于自定义和构建docker映像。戳此阅读更多关于Dockerfiles的文档

如何构建和运行GreatSQL软件,请参阅各个目录。

我们非常欢迎和鼓励社区用户提出改进建议或贡献代码、想法,以及其他任何可以帮助改进项目的做法。

如果您发现任何GreatSQL-Docker项目相关的问题、bug,都可以戳此提交issue,我们将尽快处理。

快速使用

支持哪些tag

如何使用GreatSQL镜像

例如:

$ docker run -d \
--name mgr1 --hostname=mgr1 \
-e MYSQL_ALLOW_EMPTY_PASSWORD=1 \
-e MYSQL_INIT_MGR=1 \
greatsql/greatsql

--name mgr1,设定容器名称 --hostname=mgr1,设定容器主机名 MYSQL_ALLOW_EMPTY_PASSWORD=1 设定容器中的MySQL root用户是否采用空密码 greatsql/greatsql,指定容器使用的镜像名

连接(容器中的)MySQL

运行下面的命令进入容器

$ docker exec -it mgr1 bash

可以使用mysql 客户端工具(在docker镜像中,只保留了mysql这个客户端工具)

[root@mgr1 /]# mysql
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 34
Server version: 8.0.27-18 GreatSQL (GPL), Release 18, Revision 202203211301
...
mysql  Ver 8.0.27-18 for Linux on x86_64 (GreatSQL (GPL), Release 18, Revision 202203211301)
...

[root@GreatSQL][(none)]>\s
...
Server version:        8.0.27-18 GreatSQL (GPL), Release 18, Revision 202203211301
...
[root@GreatSQL][(none)]>select version();
+-----------+
| version() |
+-----------+
| 8.0.27-18 |
+-----------+
1 row in set (0.00 sec)

如何通过 docker-compose 使用GreatSQL镜像

下面是一个docker-compose的配置文件参考 /data/docker/mysql.yml:

version: '2'

services:
  mgr1:
    image: greatsql/greatsql
    container_name: mgr1
    hostname: mgr1
    network_mode: bridge
    restart: unless-stopped
    environment:
      TZ: Asia/Shanghai
      MYSQL_ALLOW_EMPTY_PASSWORD: 1
      MYSQL_INIT_MGR: 1

运行 docker-compose -f /data/docker/mysql.yml up -d 即可创建一个新容器。 运行下面的命令查看容器运行状态:

$ docker-compose -f /data/docker/mysql.yml ps

运行下面的命令进入容器:

$ docker exec -it mgr1 bash

如何通过docker-compose构建MGR集群

下面是一个docker-compose的配置文件参考 /data/docker/mgr.yml:

version: '2'

services:
  mgr2:
    image: greatsql/greatsql #指定镜像
    container_name: mgr2    #设定容器名字
    hostname: mgr2          #设定容器中的主机名
    networks:               #指定容器使用哪个专用网络
      mgr_net:
        ipv4_address: 172.18.0.2    #设置容器使用固定IP地址,避免重启后IP变化
    restart: unless-stopped         #设定重启策略
    environment:                    #设置多个环境变量
      TZ: Asia/Shanghai             #时区
      MYSQL_ALLOW_EMPTY_PASSWORD: 1                 #允许root账户空密码
      MYSQL_INIT_MGR: 1                             #初始化MGR集群
      MYSQL_MGR_LOCAL: '172.18.0.2:33061'           #当前MGR节点的local_address
      MYSQL_MGR_SEEDS: '172.18.0.2:33061,172.18.0.3:33061,172.18.0.4:33061'     #MGR集群seeds
      MYSQL_MGR_START_AS_PRIMARY: 1                 #指定当前MGR节点为Primary角色
      MYSQL_MGR_ARBITRATOR: 0
  mgr3:
    image: greatsql/greatsql
    container_name: mgr3
    hostname: mgr3
    networks:
      mgr_net:
        ipv4_address: 172.18.0.3
    restart: unless-stopped
    depends_on:
      - "mgr2"
    environment:
      TZ: Asia/Shanghai
      MYSQL_ALLOW_EMPTY_PASSWORD: 1
      MYSQL_INIT_MGR: 1
      MYSQL_MGR_LOCAL: '172.18.0.3:33061'
      MYSQL_MGR_SEEDS: '172.18.0.2:33061,172.18.0.3:33061,172.18.0.4:33061'
      MYSQL_MGR_START_AS_PRIMARY: 0
      MYSQL_MGR_ARBITRATOR: 0                       #既非Primary,也非Arbitrator,那么就是Secondary角色了
  mgr4:
    image: greatsql/greatsql
    container_name: mgr4
    hostname: mgr4
    networks:
      mgr_net:
        ipv4_address: 172.18.0.4
    restart: unless-stopped
    depends_on:
      - "mgr3"
    environment:
      TZ: Asia/Shanghai
      MYSQL_ALLOW_EMPTY_PASSWORD: 1
      MYSQL_INIT_MGR: 1
      MYSQL_MGR_LOCAL: '172.18.0.4:33061'
      MYSQL_MGR_SEEDS: '172.18.0.2:33061,172.18.0.3:33061,172.18.0.4:33061'
      MYSQL_MGR_START_AS_PRIMARY: 0
      MYSQL_MGR_ARBITRATOR: 1                   #指定当前MGR节点为Arbitrator角色,此时不能同时指定其为Primary/Secondary角色
networks:
  mgr_net:  #创建独立MGR专属网络
    ipam:
      config:
        - subnet: 172.18.0.0/24

启动所有容器:

$ docker-compse -f /data/docker/mgr.yml up -d

容器启动后,会自行进行MySQL实例的初始化并自动构建MGR集群。

进入第一个容器,确认实例启动并成为MGR的Primary节点:

$ docker exec -it mgr1 bash
$ mysql
...
[root@GreatSQL][(none)]>select * from performance_schema.replication_group_members;
+---------------------------+--------------------------------------+-------------+-------------+--------------+-------------+----------------+----------------------------+
| CHANNEL_NAME              | MEMBER_ID                            | MEMBER_HOST | MEMBER_PORT | MEMBER_STATE | MEMBER_ROLE | MEMBER_VERSION | MEMBER_COMMUNICATION_STACK |
+---------------------------+--------------------------------------+-------------+-------------+--------------+-------------+----------------+----------------------------+
| group_replication_applier | d17d165a-ab7a-11ec-a8c0-0242ac120002 | 172.18.0.2  |        3306 | ONLINE       | PRIMARY     | 8.0.27         | XCom                       |
| group_replication_applier | d28c3916-ab7a-11ec-ab60-0242ac120003 | 172.18.0.3  |        3306 | ONLINE       | SECONDARY   | 8.0.27         | XCom                       |
| group_replication_applier | d3dc6855-ab7a-11ec-98a0-0242ac120004 | 172.18.0.4  |        3306 | ONLINE       | ARBITRATOR  | 8.0.27         | XCom                       |
+---------------------------+--------------------------------------+-------------+-------------+--------------+-------------+----------------+----------------------------+

可以看到,一个三节点的MGR集群已自动构建完毕,并且其中还包含一个ARBITRATOR节点(仲裁节点/投票节点)。

Docker-Compose环境变量/参数介绍

  • MYSQL_ROOT_PASSWORD 设置MySQL root账号的密码。如果下面指定了MYSQL_ALLOW_EMPTY_PASSWORD=1,则本参数无效。

  • MYSQL_DATABASE 是否初始化一个新的数据库。

  • MYSQL_ALLOW_EMPTY_PASSWORD 是否设置MySQL root账号使用空密码,因为安全原因,不推荐这么做。

  • MYSQL_RANDOM_ROOT_PASSWORD 设置MySQL root账号的密码采用随机生成方式。

  • MYSQL_IBP 设置innodb_buffer_pool_size,默认值:128M。

  • MYSQL_INIT_MGR 是否初始化MGR相关设置,默认值:0(否)。如果设置为1(是),则会创建MGR服务所需账号,并设定运行 CHANGE MASTER TO 设置好MGR复制通道。 非必选项。

  • MYSQL_MGR_NAME 设置group_replication_group_name,默认值:"aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaa1"。 非必选项。

  • MYSQL_MGR_LOCAL 设置 group_replication_local_address,默认值:"172.17.0.2:33061"。 如果 MYSQL_INIT_MGR=1 则为必选项。

  • MYSQL_MGR_SEEDS 设置 group_replication_group_seeds,默认值:"172.17.0.2:33061,172.17.0.3:33061"。 如果 MYSQL_INIT_MGR=1 则为必选项。

  • MYSQL_MGR_USER 设置MGR服务所需账号,默认值:repl。 非必选项。

  • MYSQL_MGR_USER_PWD 设置MGR服务所需账号的密码,默认值:repl4MGR。 非必选项。

  • MYSQL_SID 设置server_id选项,构建MGR集群时要求每个节点的server_id是唯一的,默认值:3306+随机数 非必选项。

  • MYSQL_MGR_START_AS_PRIMARY 指定当前节点在MGR中以PRIMARY角色启动,每次都会进行MGR初始化引导操作。默认值:0。 如果 MYSQL_INIT_MGR=1 则至少要有一个节点指定为PRIMARY角色。

  • MYSQL_MGR_ARBITRATOR 指定当前节点在MGR中以ARBITRATOR角色启动,该选项和MYSQL_MGR_START_AS_PRIMARY是互斥的,不能同时设置为1。默认值:0。 非必选项。

  • MYSQL_MGR_VIEWID MySQL 8.0.26开始,可以为view change单独指定一个GTID前缀,避免和正常的事务GTID混杂一起,产生问题。默认值:AUTOMATIC。 非必选项。

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