使用docker模拟双机环境测试mysql双机互为主备(Active-Active)

MariaDB双主模式测试

1. 环境准备

创建目录 mkdir conf conf2 data data2 log log2
创建 MariaDB 配置文件 touch conf/my.cnf conf2/my.cnf
conf/my.cnf文件

# The MariaDB configuration file
#
# The MariaDB/MySQL tools read configuration files in the following order:
# 0. "/etc/mysql/my.cnf" symlinks to this file, reason why all the rest is read.
# 1. "/etc/mysql/mariadb.cnf" (this file) to set global defaults,
# 2. "/etc/mysql/conf.d/*.cnf" to set global options.
# 3. "/etc/mysql/mariadb.conf.d/*.cnf" to set MariaDB-only options.
# 4. "~/.my.cnf" to set user-specific options.
#
# If the same option is defined multiple times, the last one will apply.
#
# One can use all long options that the program supports.
# Run program with --help to get a list of available options and with
# --print-defaults to see which it would actually understand and use.
#
# If you are new to MariaDB, check out https://mariadb.com/kb/en/basic-mariadb-articles/

#
# This group is read both by the client and the server
# use it for options that affect everything
#
[client-server]
# Port or socket location where to connect
# port = 3306
socket = /run/mysqld/mysqld.sock

# Import all .cnf files from configuration directory
!includedir /etc/mysql/conf.d/
!includedir /etc/mysql/mariadb.conf.d/
[mysqld]
server-id=1
log-bin=mysql-bin
binlog_format = mixed
binlog-do-db=event_analysis 
binlog-ignore-db =mysql
binlog-ignore-db =information_schema
binlog-ignore-db =performance_schema

replicate-do-db=event_analysis
replicate-ignore-db=mysql
replicate-ignore-db=information_schema
replicate-ignore-db=performance_schema
read-only=0

relay_log=mysqld-relay-bin
log-slave-updates=ON
auto-increment-increment = 2
auto-increment-offset = 1

conf/my.cnf文件

# The MariaDB configuration file
#
# The MariaDB/MySQL tools read configuration files in the following order:
# 0. "/etc/mysql/my.cnf" symlinks to this file, reason why all the rest is read.
# 1. "/etc/mysql/mariadb.cnf" (this file) to set global defaults,
# 2. "/etc/mysql/conf.d/*.cnf" to set global options.
# 3. "/etc/mysql/mariadb.conf.d/*.cnf" to set MariaDB-only options.
# 4. "~/.my.cnf" to set user-specific options.
#
# If the same option is defined multiple times, the last one will apply.
#
# One can use all long options that the program supports.
# Run program with --help to get a list of available options and with
# --print-defaults to see which it would actually understand and use.
#
# If you are new to MariaDB, check out https://mariadb.com/kb/en/basic-mariadb-articles/

#
# This group is read both by the client and the server
# use it for options that affect everything
#
[client-server]
# Port or socket location where to connect
# port = 3306
socket = /run/mysqld/mysqld.sock

# Import all .cnf files from configuration directory
!includedir /etc/mysql/conf.d/
!includedir /etc/mysql/mariadb.conf.d/
[mysqld]
server-id=2
log-bin=mysql-bin
binlog_format = mixed
binlog-do-db=event_analysis 
binlog-ignore-db =mysql
binlog-ignore-db =information_schema
binlog-ignore-db =performance_schema

replicate-do-db=event_analysis
replicate-ignore-db=mysql
replicate-ignore-db=information_schema
replicate-ignore-db=performance_schema
read-only=0

relay_log=mysqld-relay-bin
log-slave-updates=ON
auto-increment-increment = 2
auto-increment-offset = 1

使用 docker 启动两个 MariaDB 容器 bak1 和 bak2 。使用 docker-compose up 启动容器。

version: '2'
services:
  "mariadb":
    image: mariadb:10.5.5
    container_name: "bak1"
    restart: always
    environment:
      MYSQL_USER: "root"
      MYSQL_PASSWORD: "123456"
      MYSQL_ROOT_PASSWORD: "123456"
      TZ: "Asia/Shanghai"
    ports:
      - "3307:3306"
    volumes:
      - ./data:/var/lib/mysql
      - ./log:/var/log/mysql
      - ./conf/my.cnf:/etc/mysql/my.cnf
    networks:
      mysql_bak_net:
  "mariadb2":
    image: mariadb:10.5.5
    container_name: "bak2"
    restart: always
    environment:
      MYSQL_USER: "root"
      MYSQL_PASSWORD: "123456"
      MYSQL_ROOT_PASSWORD: "123456"
      TZ: "Asia/Shanghai"
    ports:
      - "3308:3306"
    volumes:
      - ./data2:/var/lib/mysql
      - ./log2:/var/log/mysql
      - ./conf2/my.cnf:/etc/mysql/my.cnf
    networks:
      mysql_bak_net:
networks:
  mysql_bak_net:

2. 操作步骤

容器名	bak1	bak2
ip	172.24.0.3	172.24.0.2
user	root	root
password	123456	123456
server-id	1	2
进入容器	docker exec -it bak1 bash	docker exec -it bak2 bash
进入sql	mysql -u root -p	mysql -u root -p
查看master状态	show master status\G; File: mysql-bin.000003 Position: 328 Binlog_Do_DB: event_analysis Binlog_Ignore_DB: mysql,information_schema,performance_schema	show master status\G; File: mysql-bin.000003 Position: 328 Binlog_Do_DB: event_analysis Binlog_Ignore_DB: mysql,information_schema,performance_schema
主从复制	CHANGE MASTER TO MASTER_HOST=‘172.24.0.2’, MASTER_USER=‘root’, MASTER_PASSWORD=‘123456’, MASTER_LOG_FILE=‘mysql-bin.000003’, MASTER_LOG_POS=328;	CHANGE MASTER TO MASTER_HOST=‘172.24.0.3’, MASTER_USER=‘root’, MASTER_PASSWORD=‘123456’, MASTER_LOG_FILE=‘mysql-bin.000003’, MASTER_LOG_POS=328;
查看slave状态	show slave status\G;	show slave status\G;
重启MariaDB
查看slave状态	show slave status\G;	show slave status\G;
验证	在bak1中创建表，更新数据，bak2也会更新。	在bak2中创建表，更新数据，bak1也会更新。