基于Docker的Mysql主备搭建的实现步骤基于Docker的Mysql主备搭建的实现

前期规划：
配置过程：

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 lsNETWORK IDNAMEDRIVERSCOPEb03fab4e1371bridgebridgelocal0abda6b25a0ehosthostlocal844e3f85e00emysqlbridgelocalc2bbcb4013a7nonenulllocal

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 psCONTAINER IDIMAGECOMMANDCREATEDSTATUSPORTSNAMES205cd234c29bmysql:5.7"docker-entrypoint.s…"9 seconds agoUp 7 seconds33060/tcp, 0.0.0.0:3308->3306/tcp, :::3308->3306/tcpmysql-slavecdcc14b2b2a2mysql:5.7"docker-entrypoint.s…"49 seconds agoUp 46 seconds33060/tcp, 0.0.0.0:3307->3306/tcp, :::3307->3306/tcpmysql-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/bashroot@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/bashroot@205cd234c29b:/# mysql -u root -pEnter password: Welcome to the MySQL monitor.Commands end with ; or \g.Your MySQL connection id is 2Server 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 itsaffiliates. Other names may be trademarks of their respectiveowners.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/bashroot@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/bashroot@205cd234c29b:/# mysql -u root -pEnter password: Welcome to the MySQL monitor.Commands end with ; or \g.Your MySQL connection id is 3Server 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 itsaffiliates. Other names may be trademarks of their respectiveowners.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 eventMaster_Host: 172.88.0.11Master_User: slaveMaster_Port: 3306Connect_Retry: 60Master_Log_File: mysql-bin.000002Read_Master_Log_Pos: 617Relay_Log_File: edu-mysql-relay-bin.000002Relay_Log_Pos: 320Relay_Master_Log_File: mysql-bin.000002Slave_IO_Running: YesSlave_SQL_Running: YesReplicate_Do_DB: Replicate_Ignore_DB: Replicate_Do_Table: Replicate_Ignore_Table: Replicate_Wild_Do_Table: Replicate_Wild_Ignore_Table: Last_Errno: 0Last_Error: Skip_Counter: 0Exec_Master_Log_Pos: 617Relay_Log_Space: 531Until_Condition: NoneUntil_Log_File: Until_Log_Pos: 0Master_SSL_Allowed: NoMaster_SSL_CA_File: Master_SSL_CA_Path: Master_SSL_Cert: Master_SSL_Cipher: Master_SSL_Key: Seconds_Behind_Master: 0Master_SSL_Verify_Server_Cert: NoLast_IO_Errno: 0Last_IO_Error: Last_SQL_Errno: 0Last_SQL_Error: Replicate_Ignore_Server_Ids: Master_Server_Id: 100Master_UUID: 46cc703d-5b0e-11ec-a43c-0242ac110002Master_Info_File: /var/lib/mysql/master.infoSQL_Delay: 0SQL_Remaining_Delay: NULLSlave_SQL_Running_State: Slave has read all relay log; waiting for more updatesMaster_Retry_Count: 86400Master_Bind: Last_IO_Error_Timestamp: Last_SQL_Error_Timestamp: Master_SSL_Crl: Master_SSL_Crlpath: Retrieved_Gtid_Set: Executed_Gtid_Set: Auto_Position: 0Replicate_Rewrite_DB: Channel_Name: Master_TLS_Version:

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