基于Docker的Mysql主备搭建
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Docker mysql主从配置。我们会在一台centos的虚拟机上，配置mysql主备
前期规划：
- docker mysql版本 mysql:5.7
- docker网络配置，我们会创建名称为mysql的网络，子网掩码为 172.88.0.0/16
- docker mysql主对应的容器名称：mysql-master， ip地址：172.88.0.11，映射端口：3307，文件卷配置(配置文件和数据文件持久化)mysql配置文件地址：/usr/local/docker/mysql/slave/conf，mysql数据文件地址：/usr/local/docker/mysql/slave/data
- docker mysql从对应的容器名称：mysql-slave, ip地址: 172.88.0.12，映射端口：3308，文件卷配置(配置文件和数据文件持久化)mysql配置文件地址：/usr/local/docker/mysql/master/conf，mysql数据文件地址：/usr/local/docker/mysql/master/data
配置过程：
-
- 网络创建(两个mysql之间是需要通信的)
# 创建网络mysql，子网掩码172.88.0.0/16 [root@localhost conf]# docker network create mysql --subnet 172.88.0.0/16 # 查看网络是否创建成功：有mysql则表示创建成功 [root@localhost conf]# docker network ls NETWORK ID NAME DRIVER SCOPE b03fab4e1371 bridge bridge local 0abda6b25a0e host host local 844e3f85e00e mysql bridge local c2bbcb4013a7 none null local -
- 拉取docker mysql镜像，这里我们使用的是mysql:5.7版本
# 拉取docker镜像，mysql:5.7版本 [root@localhost ~]# docker pull mysql:5.7 -
- 启动两个mysql容器，mysql-master,mysql-slave
# 记得修改下conf的配置文件 # chmod -R 777 /usr/local/docker/mysql/master/conf # chmod -R 777 /usr/local/docker/mysql/slave/conf # 启动容器,一个对应主，一个对应从 # mysql master [mysql-master, 3307，172.88.0.11，/usr/local/docker/mysql/master/data，/usr/local/docker/mysql/master/conf] [root@localhost /]# docker run --name mysql-master -p 3307:3306 -v /usr/local/docker/mysql/master/data:/var/lib/mysql -v /usr/local/docker/mysql/master/conf:/etc/mysql/ -e MYSQL_ROOT_PASSWORD=123456 -d --net mysql --ip 172.88.0.11 mysql:5.7 # mysql slave [mysql-slave, 3308，172.88.0.12，/usr/local/docker/mysql/slave/data，/usr/local/docker/mysql/slave/conf] [root@localhost /]# docker run --name mysql-slave -p 3308:3306 -v /usr/local/docker/mysql/slave/data:/var/lib/mysql -v /usr/local/docker/mysql/slave/conf:/etc/mysql/ -e MYSQL_ROOT_PASSWORD=123456 -d --net mysql --ip 172.88.0.12 mysql:5.7 # 查看mysql-master,mysql-slave两个容器是否正确启动 [root@localhost /]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 205cd234c29b mysql:5.7 "docker-entrypoint.s…" 9 seconds ago Up 7 seconds 33060/tcp, 0.0.0.0:3308->3306/tcp, :::3308->3306/tcp mysql-slave cdcc14b2b2a2 mysql:5.7 "docker-entrypoint.s…" 49 seconds ago Up 46 seconds 33060/tcp, 0.0.0.0:3307->3306/tcp, :::3307->3306/tcp mysql-master -
- mysql主备配置
# 修改配置文件 # mysql-master配置文件修改，因为我们做了docker文件卷处理，所以我们直接在宿主机/usr/local/docker/mysql/master/conf下操作即可 [root@localhost ~]# cd /usr/local/docker/mysql/master/conf/ [root@localhost conf]# vi my.cnf # 在my.cnf里面输入如下信息 [mysqld] ## 同一局域网内注意要唯一 server-id=100 ## 开启二进制日志功能，可以随便取（关键） log-bin=mysql-bin # 进入mysql-master容器里面重启mysql服务 # docker exec -it mysql-master /bin/bash 进入mysql-master容器 # service mysql restart重启mysql服务器 # 这里有一点要注意，重启mysql服务之后，mysql-master容器被关掉了，所以我们需要docker start mysql-master在启动下容器 [root@localhost /]# docker exec -it mysql-master /bin/bash root@cdcc14b2b2a2:/# service mysql restart [root@localhost /]# docker start mysql-master # 再次进入mysql-master容器授予slave用户 REPLICATION SLAVE权限和REPLICATION CLIENT权限，用于在主从库之间同步数据[slave用户是用来做数据同步的] # 1. CREATE USER 'slave'@'%' IDENTIFIED BY '123456'; # 2. GRANT REPLICATION SLAVE, REPLICATION CLIENT ON *.* TO 'slave'@'%'; # 3. show master status; 查看主库状态，请记住File和Position对应的值 [root@localhost /]# docker exec -it mysql-master /bin/bash root@205cd234c29b:/# mysql -u root -p Enter password: Welcome to the MySQL monitor. Commands end with ; or \\g. Your MySQL connection id is 2 Server version: 5.7.36-log MySQL Community Server (GPL) Copyright (c) 2000, 2021, Oracle and/or its affiliates. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\\h' for help. Type '\\c' to clear the current input statement. mysql> CREATE USER 'slave'@'%' IDENTIFIED BY '123456'; Query OK, 0 rows affected (0.04 sec) mysql> GRANT REPLICATION SLAVE, REPLICATION CLIENT ON *.* TO 'slave'@'%'; Query OK, 0 rows affected (0.00 sec) mysql> show master status; +------------------+----------+--------------+------------------+-------------------+ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set | +------------------+----------+--------------+------------------+-------------------+ | mysql-bin.000002 | 617 | | | | +------------------+----------+--------------+------------------+-------------------+ 1 row in set (0.01 sec) mysql> # mysql-slave配置文件修改，因为我们做了docker文件卷处理，所以我们直接在宿主机/usr/local/docker/mysql/slave/conf下操作即可 [root@localhost conf]# cd /usr/local/docker/mysql/slave/conf/ [root@localhost conf]# vi my.cnf # 在my.cnf里面输入如下信息 [mysqld] ## 设置server_id,注意要唯一 server-id=101 ## 开启二进制日志功能，以备Slave作为其它Slave的Master时使用 log-bin=mysql-slave-bin ## relay_log配置中继日志 relay_log=edu-mysql-relay-bin # 进入mysql-slave容器里面重启mysql服务 # docker exec -it mysql-slave /bin/bash 进入mysql-master容器 # service mysql restart重启mysql服务器 # 这里又一点要注意，重启mysql服务之后，mysql-slave容器被关掉了，所以我们需要docker start mysql-slave在启动下容器 [root@localhost /]# docker exec -it mysql-slave /bin/bash root@205cd234c29b:/# service mysql restart [root@localhost /]# docker start mysql-slave # 再次进入mysql-slave容器，连上mysql-slave数据库 [root@localhost /]# docker exec -it mysql-slave /bin/bash [root@localhost conf]# docker exec -it mysql-slave /bin/bash root@205cd234c29b:/# mysql -u root -p Enter password: Welcome to the MySQL monitor. Commands end with ; or \\g. Your MySQL connection id is 3 Server version: 5.7.36-log MySQL Community Server (GPL) Copyright (c) 2000, 2021, Oracle and/or its affiliates. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\\h' for help. Type '\\c' to clear the current input statement. mysql> change master to master_host='172.88.0.11', master_port=3306, master_user='slave',master_password='123456',master_log_file='mysql-bin.000002', master_log_pos=617; Query OK, 0 rows affected, 2 warnings (0.06 sec) mysql> start slave; Query OK, 0 rows affected (0.02 sec) mysql> show slave status\\G; *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 172.88.0.11 Master_User: slave Master_Port: 3306 Connect_Retry: 60 Master_Log_File: mysql-bin.000002 Read_Master_Log_Pos: 617 Relay_Log_File: edu-mysql-relay-bin.000002 Relay_Log_Pos: 320 Relay_Master_Log_File: mysql-bin.000002 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: 531 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: 100 Master_UUID: 46cc703d-5b0e-11ec-a43c-0242ac110002 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:
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