docker mysql5.7 主从_docker-compose mysql5.7.30 主从

一、安装mysql5.7.30主库

1.准备docker和docker-compose环境

2.创建yml目录,相关数据挂载

#yml存放的目录

mkdir -p /root/docker-compse/mysql

#主库的/var/lib/mysql 数据的挂载目录

mkdir -p /data/mysql5matser

#不用slave 了,用replication的缩写replic , slave 是奴隶的意思,在美国有种族歧视的之嫌

#从库的/var/lib/mysql 数据的挂载目录

mkdir -p /data/mysql5replic

3.创建网络空间,配置时区

docker network create mysql-replic

echo 'Asia/Shanghai' > /etc/timezone

4.提前准备好所需镜像

docker pull mysql:5.7.30

5.主库/root/docker-compse/mysql/master.yml

version: '3.7'

services:

#主库服务名称

mysql-master:

#容器名称

container_name: mysql-master

#镜像名称 提前 docker pull mysql:5.7.30 不然会很慢

image: mysql:5.7.30

#docker 重启后容器重启

restart: always

#选择自建bridge网络

networks:

- mysql_replic

#mysql 参数配置 my.cnf里面的配置,这里简单配置下,可以配置volumes /etc/my.cnf:/etc/my.cnf

command: --character-set-server=utf8mb4 --collation-server=utf8mb4_general_ci --server-id=1 --log-bin=mysql-bin

environment:

- TZ=Asia/Shanghai

#默认密码配置 123456 修改成您的密码

- MYSQL_ROOT_PASSWORD=123456

ports:

- 3307:3306

volumes:

- /etc/localtime:/etc/localtime

- /etc/timezone:/etc/timezone

#挂载目录 /var/lib/mysql 是mysql的数据

- /data/mysql5matser:/var/lib/mysql

#配置网络

networks:

mysql_replic:

name: mysql_replic

#强制使用已经创建好的网络,不然报错

external: true

6.启动主库

docker-compose -f master.yml up -d

7.进入容器,登录主库

#进入docker

docker exec -it mysql-master bash

#进入docker的mysql

mysql -uroot -p

#输入密码

8.创建同步账号replic,授权同步权限,查看主库状态信息

-- 创建同步账号

CREATE USER 'replic'@'%' IDENTIFIED BY '123456';

-- 授权权限

GRANT REPLICATION SLAVE, REPLICATION CLIENT ON *.* TO 'replic'@'%';

-- 查看主节点状态

show master status;

-- 数据的结果

-- +------------------+----------+--------------+------------------+-------------------+

-- | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |

-- +------------------+----------+--------------+------------------+-------------------+

-- | mysql-bin.000003 | 619 | | | |

-- +------------------+----------+--------------+------------------+-------------------+

二、安装mysql5.7从库,同步主库数据

1.从库/root/docker-compse/mysqlreplic.yml

version: '3.7'

services:

#从库服务名称

mysql-replic:

#容器名称

container_name: mysql-replic

#镜像名称 提前 docker pull mysql:5.7.30 不然会很慢

image: mysql:5.7.30

#docker 重启后容器重启

restart: always

#选择自建bridge网络

networks:

- mysql_replic

command: --character-set-server=utf8mb4 --collation-server=utf8mb4_general_ci --server-id=2 --log-bin=mysql-slave-bin --relay_log=ep-mysql-relay-bin  --read_only=1

environment:

#时区

- TZ=Asia/Shanghai

#默认密码配置

- MYSQL_ROOT_PASSWORD=123456

volumes:

- /etc/localtime:/etc/localtime

- /etc/timezone:/etc/timezone

#挂载目录 /var/lib/mysql 是数据盘

- /data/mysql5replic:/var/lib/mysql

ports:

- 3308:3306

#配置网络

networks:

mysql_replic:

name: mysql_replic

#强制使用已经创建好的网络,不然报错

external: true

2.启动从库

docker-compose -f replic.yml up -d

#不用管 提醒

#WARNING: Found orphan containers (mysql-master) for this project. If you removed or renamed this service in your compose file, you can run this command with the --remove-orphans flag to clean it up.

3.进入容器,登录从库

#进入容器

docker exec -it mysql-replic bash

#登录mysql

mysql -uroot -p

#输入密码

4.同步脚本

-- 查看从库状态

show slave status ;

-- 第一次安装执行会返回

-- Empty set (0.00 sec)

-- 同步设置

change master to master_host='mysql-master', master_user='replic', master_password='123456', master_port=3306, master_log_file='mysql-bin.000003', master_log_pos=619;

-- 启动同步

start slave;

-- 查看同步结果

show slave status \G;

-- *************************** 1. row ***************************

-- Slave_IO_State: Waiting for master to send event

-- Master_Host: mysql-master

-- Master_User: replic

-- Master_Port: 3306

-- Connect_Retry: 60

-- Master_Log_File: mysql-bin.000003

-- Read_Master_Log_Pos: 619

-- Relay_Log_File: ep-mysql-relay-bin .000002

-- Relay_Log_Pos: 320

-- 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: 619

-- Relay_Log_Space: 532

-- 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: b2353e18-8d00-11ea-9de4-0242ac170002

-- 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:

5.成功标志

-- 表示同步成功

-- Slave_IO_Running: Yes

-- Slave_SQL_Running: Yes

三、检查主从同步

1.进入主库创建一个数据库

create database test;

show databases;

-- 输出

-- +--------------------+

-- | Database |

-- +--------------------+

-- | information_schema |

-- | mysql |

-- | performance_schema |

-- | sys |

-- | test |

.主库创建只读账号,供从库只读使用

grant select on *.* TO 'view'@'%' identified by '123456';

-- 从库修改数据会

--1290 - The MySQL server is running with the --read-only option so it cannot execute this statement

3.进入从库查看

show databases;

-- 输出

-- +--------------------+

-- | Database |

-- +--------------------+

-- | information_schema |

-- | mysql |

-- | performance_schema |

-- | sys |

-- | test |

四、卸载mysql主从

1.删除容器

#删除从库容器

docker-compose -f replic.yml down

#删除主库容器

docker-compose -f master.yml down

2.删除数据(谨慎使用此命令)

rm -rf /data/mysql5matser

rm -rf /data/mysql5replic

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