docker-compose搭建的Mysql 一主多从
1.创建mysql的存放目录
mkdir -p /mnt/mysql
cd /mnt/mysql
mkdir mysql_master
mkdir mysql_slave1
mkdir mysql_slave2
# 创建好了mysql_master，mysql_slave1，mysql_slave2之后在里面全部创建这几个文件夹以及my.cnf文件
cd /mnt/mysql/mysql_master
mkdir data
mkdir log
mkdir conf
cd ./conf
touch my.cnf
# mysql_slave1，mysql_slave2 操作相同这里就不写了
2.编写docker-compose.yml文件,文件放在/mnt/mysql下
version: '3.7'
services:
mysql_master: # 服务名称
image: mysql:8.0.29 # 创建容器时所需的镜像
container_name: mysql_master # 容器名称
restart: always # 容器总是重新启动
ports:
- 3306:3306
volumes: # 数据卷，目录挂载
- ./mysql_master/conf/my.cnf:/etc/mysql/my.cnf
- ./mysql_master/data:/var/lib/mysql
- ./mysql_master/log:/var/log/mysql
- /etc/localtime:/etc/localtime:ro
environment:
- MYSQL_ROOT_PASSWORD=586c1a93686f13f15bad64a90219ced9
- SET_CONTAINER_TIMEZONE=true
- CONTAINER_TIMEZONE=Asia/Shanghai
mysql_slave1: # 服务名称
image: mysql:8.0.29 # 创建容器时所需的镜像
container_name: mysql_slave1 # 容器名称
restart: always # 容器总是重新启动
ports:
- 3307:3306
volumes: # 数据卷，目录挂载
- ./mysql_slave1/conf/my.cnf:/etc/mysql/my.cnf
- ./mysql_slave1/data:/var/lib/mysql
- ./mysql_slave1/log:/var/log/mysql
- /etc/localtime:/etc/localtime:ro
environment:
- MYSQL_ROOT_PASSWORD=123456
- SET_CONTAINER_TIMEZONE=true
- CONTAINER_TIMEZONE=Asia/Shanghai
mysql_slave2: # 服务名称
image: mysql:8.0.29 # 创建容器时所需的镜像
container_name: mysql_slave2 # 容器名称
restart: always # 容器总是重新启动
ports:
- 3308:3306
volumes: # 数据卷，目录挂载
- ./mysql_slave2/conf/my.cnf:/etc/mysql/my.cnf
- ./mysql_slave2/data:/var/lib/mysql
- ./mysql_slave2/log:/var/log/mysql
- /etc/localtime:/etc/localtime:ro
environment:
- MYSQL_ROOT_PASSWORD=123456
- SET_CONTAINER_TIMEZONE=true
- CONTAINER_TIMEZONE=Asia/Shanghai
# 自定义网络配置 使用 docker network create <name>，创建网络，并使用以下内容
# 将redis绑定<name>这个网络上面,后期application.yml中的IP
# 将可以使用container_name也就是容器名称进行访问
networks:
default:
external: true
name: mynetwork
3.修改my.cnf文件
vim /mnt/mysql/mysql_master/conf/my.cnf
[mysqld]
# 服务器唯一id，默认值1
server-id=1
# 设置日志格式，默认值ROW
binlog_format=STATEMENT
vim /mnt/mysql/mysql_slave1/conf/my.cnf
[mysqld]
# 服务器唯一id，默认值1
server-id=2
vim /mnt/mysql/mysql_slave2/conf/my.cnf
[mysqld]
# 服务器唯一id，默认值1
server-id=3
4.启动docker-compose
cd /mnt/mysql
docker-compose up -d
#运行完成之后使用docker ps 就可以看到所有已经在运行的容器了
docker ps
5.进入mysql_master容器
docker exec -it mysql_master env LANG=C.UTF-8 /bin/bash
#进入容器之后执行mysql命令
mysql -u root -p
#修改默认密码校验方式
ALTER USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY '123456';
# 创建slave用户
CREATE USER 'slave'@'%';
# 设置密码
ALTER USER 'slave'@'%' IDENTIFIED WITH mysql_native_password BY '123456';
# 授予复制权限
GRANT REPLICATION SLAVE ON *.* TO 'slave'@'%';
# 刷新权限
FLUSH PRIVILEGES;
# 主机中查询master状态,记下`File`和`Position`的值
SHOW MASTER STATUS;
# 执行完此步骤后不要再操作主服务器MYSQL，防止主服务器状态值变化。
6.处理mysql_slave1
#进入容器：
docker exec -it mysql_slave1 env LANG=C.UTF-8 /bin/bash
#进入容器内的mysql命令行
mysql -u root -p
#修改默认密码校验方式
ALTER USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY '123456';
# 在从机上配置主从关系，
CHANGE MASTER TO MASTER_HOST='192.168.0.105',
MASTER_USER='slave',MASTER_PASSWORD='123456', MASTER_PORT=3306,
MASTER_LOG_FILE='binlog.000003',MASTER_LOG_POS=1095;
# 启动主从同步
START SLAVE;
# 查看状态（不需要分号）
SHOW SLAVE STATUS\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.0.105
Master_User: slave
Master_Port: 3306
Connect_Retry: 30
Master_Log_File: mysql-bin.000003
Read_Master_Log_Pos: 617
Relay_Log_File: 7fee2f1fd5d2-relay-bin.000002
Relay_Log_Pos: 783
Relay_Master_Log_File: mysql-bin.000003
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB:
Replicate_Ignore_DB:
Replicate_Do_Table:
Replicate_Ignore_Table:
Replicate_Wild_Do_Table:
Replicate_Wild_Ignore_Table:
Last_Errno: 0
Last_Error:
Skip_Counter: 0
Exec_Master_Log_Pos: 617
Relay_Log_Space: 997
Until_Condition: None
Until_Log_File:
Until_Log_Pos: 0
Master_SSL_Allowed: No
Master_SSL_CA_File:
Master_SSL_CA_Path:
Master_SSL_Cert:
Master_SSL_Cipher:
Master_SSL_Key:
Seconds_Behind_Master: 0
Master_SSL_Verify_Server_Cert: No
Last_IO_Errno: 0
Last_IO_Error:
Last_SQL_Errno: 0
Last_SQL_Error:
Replicate_Ignore_Server_Ids:
Master_Server_Id: 1
Master_UUID: 8f6e9f5a-61f4-11eb-ac84-0242c0a86002
Master_Info_File: /var/lib/mysql/master.info
SQL_Delay: 0
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates
Master_Retry_Count: 86400
Master_Bind:
Last_IO_Error_Timestamp:
Last_SQL_Error_Timestamp:
Master_SSL_Crl:
Master_SSL_Crlpath:
Retrieved_Gtid_Set:
Executed_Gtid_Set:
Auto_Position: 0
Replicate_Rewrite_DB:
Channel_Name:
Master_TLS_Version:
1 row in set (0.01 sec)
将刚刚主机上查询的File和Position的值分别带入MASTER_LOG_FILE和MASTER_LOG_POS
MASTER_HOST 这里这个可以使用宿主机的ip 也可以使用容器的ip 容器IP 可以使用docker network inspect 容器名进行查看。这里小编建议使用宿主机ip应为容器IP地址会在容器重启的时候进行变动，不过容器重启的话主从关系是需要重新设置的。其实用哪个ip问题都不大
7.处理mysql_slave2
#进入容器：
docker exec -it mysql_slave2 env LANG=C.UTF-8 /bin/bash
#进入容器内的mysql命令行
mysql -u root -p
#修改默认密码校验方式
ALTER USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY '123456';
# 在从机上配置主从关系，
CHANGE MASTER TO MASTER_HOST='192.168.0.105',
MASTER_USER='slave',MASTER_PASSWORD='123456', MASTER_PORT=3306,
MASTER_LOG_FILE='binlog.000003',MASTER_LOG_POS=1095;
# 启动主从同步
START SLAVE;
# 查看状态（不需要分号）
SHOW SLAVE STATUS\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.0.105
Master_User: slave
Master_Port: 3306
Connect_Retry: 30
Master_Log_File: mysql-bin.000003
Read_Master_Log_Pos: 617
Relay_Log_File: 7fee2f1fd5d2-relay-bin.000002
Relay_Log_Pos: 783
Relay_Master_Log_File: mysql-bin.000003
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB:
Replicate_Ignore_DB:
Replicate_Do_Table:
Replicate_Ignore_Table:
Replicate_Wild_Do_Table:
Replicate_Wild_Ignore_Table:
Last_Errno: 0
Last_Error:
Skip_Counter: 0
Exec_Master_Log_Pos: 617
Relay_Log_Space: 997
Until_Condition: None
Until_Log_File:
Until_Log_Pos: 0
Master_SSL_Allowed: No
Master_SSL_CA_File:
Master_SSL_CA_Path:
Master_SSL_Cert:
Master_SSL_Cipher:
Master_SSL_Key:
Seconds_Behind_Master: 0
Master_SSL_Verify_Server_Cert: No
Last_IO_Errno: 0
Last_IO_Error:
Last_SQL_Errno: 0
Last_SQL_Error:
Replicate_Ignore_Server_Ids:
Master_Server_Id: 1
Master_UUID: 8f6e9f5a-61f4-11eb-ac84-0242c0a86002
Master_Info_File: /var/lib/mysql/master.info
SQL_Delay: 0
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates
Master_Retry_Count: 86400
Master_Bind:
Last_IO_Error_Timestamp:
Last_SQL_Error_Timestamp:
Master_SSL_Crl:
Master_SSL_Crlpath:
Retrieved_Gtid_Set:
Executed_Gtid_Set:
Auto_Position: 0
Replicate_Rewrite_DB:
Channel_Name:
Master_TLS_Version:
1 row in set (0.01 sec)
只要使用SHOW SLAVE STATUS\G查看到的 Slave_IO_Running，Slave_SQL_Running结果都是yes那说明mysql的一主多从简单配置就已经完成了