基于Docker的Mysql主备搭建的实现步骤

目录

• 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 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: 

到此这篇关于基于Docker的Mysql主备搭建的实现步骤的文章就介绍到这了,更多相关Docker Mysql主备搭建内容请搜索我们以前的文章或继续浏览下面的相关文章希望大家以后多多支持我们！