docker-compose搭建mariadb主从

1.下载镜像

docker pull mariadb

2. 安装测试

docker run --name mariadb -e MARIADB_ROOT_PASSWORD=123456 -d mariadb

3. mariadb配置文件

master.cnf

[client]
# 默认字符集
default-character-set=utf8mb4

[mysqld]
# 字符集
character-set-server  = utf8mb4
collation-server      = utf8mb4_general_ci
# 服务器引擎
default-storage-engine=InnoDB

# 表名小写
# lower_case_table_names=1

# bin-log
log_bin=mariadb-bin
server-id=1
log-bin=/var/log/mysql/mariadb-bin
# binlog 格式 row statement mixed
binlog_format=row

# 忽略的数据库binlog
binlog-ignore-db=mysql,information_schema
# 到期自动删除
expire_logs_day=7

slave.cnf

[client]
# 默认字符集
default-character-set=utf8mb4

[mysqld]
# 字符集
character-set-server  = utf8mb4
collation-server      = utf8mb4_general_ci
# 服务器引擎
default-storage-engine=InnoDB

# 表名小写
#lower_case_table_names=1

# bin-log
log_bin=mariadb-bin
server-id=11
# 同步刷新binlog
sync_binlog=1
# 从库日志更新
log_slave_updates=1
# 忽略的数据库binlog
binlog-ignore-db=mysql,information_schema
# 记录同步信息
relay-log=slave-relay-bin
# 设置只读
read_only=1
# 到期自动删除
expire_logs_day=7

4. docker-compose编写

主节点3306，从节点3307

创建网络
docker network create mariadb-network

version: '3'

services:
  mariadb-master: 
    image: mariadb
    container_name: mariadb-master
    hostname: mariadb-master
    restart: always
    volumes: 
        - /srv/mariadb/master/data:/var/lib/mysql
        - /srv/mariadb/master/logs:/logs
        - /srv/mariadb/master/master.cnf:/etc/mysql/my.cnf
        - /etc/localtime:/etc/localtime
    environment:
      MYSQL_ROOT_PASSWORD: 123456
    ports:
      - 3306:3306
    command:
      --lower_case_table_names=1
  mariadb-slave01:
    image: mariadb
    container_name: mariadb-slave01
    hostname: mariadb-slave01
    restart: always
    volumes:    # 挂载
        - /srv/mariadb/slave01/data:/var/lib/mysql
        - /srv/mariadb/slave01/logs:/logs
        - /srv/mariadb/slave01/slave.cnf:/etc/mysql/my.cnf
        - /etc/localtime:/etc/localtime
    environment:
      MYSQL_ROOT_PASSWORD: 123456
    ports:
      - 3307:3306
    command:
      --lower_case_table_names=1

networks:
  default:
    external:
      name: mariadb-network

yml列表用空格，用tab可能报错

5. 启动服务

docker-compose up -d

启动一直restart可以查看日志

docker logs containerName(容器名)

6. 查看主服务器是否开启log_bin

# 进入主服务器
docker exec -it mariadb-master /bin/bash
# 进入mariadb
mysql -uroot -p123456
# 查看bin_log
show variables like '%log_bin%';

7. 创建从服务器同步用户并授权

# 创建用户
create user 'slave'@'%' identified by '123456';
# 授权
grant replication slave on *.* to 'slave'@'%';
flush privileges;

8.从服务器配置

#登录从服务器
docker exec -it mariadb-slave /bin/bash

# 指定master
change master to master_host='mariadb-master',master_port=3306,\
  master_user='slave',master_password='123456',master_log_file='mariadb-bin.000003',
 master_log_pos=782,MASTER_SSL=1;
 # 启动从服务器
 start slave;
 # 查看从服务器状态
 show slave status \G;

9.验证

主服务器创建数据库，插入数据