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docker-compose 实现mysql主从节点

mysql aide_941 6℃

step1:
首先docker-compose搭建三个mysql, 基础操作

services:
    mysql-master:
       image: mysql:5.7.18
       networks:
          mysqlnet:
            ipv4_address: 172.19.4.24
       environment:
         - MYSQL_ROOT_PASSWORD=123456
       ports:
         - "3307:3306"
       volumes:
         - /var/lib/mysql1:/var/lib/mysql
         - /root/mysqlCluster/conf/my-m.cnf:/etc/mysql/my.cnf:ro
       privileged: true
       restart: always
    mysql-slave1:
       image: mysql:5.7.18
       networks:
          mysqlnet:
            ipv4_address: 172.19.4.25
       environment:
         - MYSQL_ROOT_PASSWORD=123456
       ports:
         - "3308:3306"
       volumes:
         - /var/lib/mysql2:/var/lib/mysql
         - /root/mysqlCluster/conf/my-s1.cnf:/etc/mysql/my.cnf:ro
       privileged: true
       restart: always
       depends_on:
         - mysql-master
    mysql-slave2:
       image: mysql:5.7.18
       networks:
          mysqlnet:
            ipv4_address: 172.19.4.26
       environment:
         - MYSQL_ROOT_PASSWORD=123456
       ports:
         - "3309:3306"
       depends_on:
         - mysql-master
       volumes:
         - /var/lib/mysql3:/var/lib/mysql
         - /root/mysqlCluster/conf/my-s2.cnf:/etc/mysql/my.cnf:ro
       privileged: true
       restart: always
networks:
  mysqlnet:
    driver: bridge
    ipam:
      driver: default
      config:
      - subnet: 172.19.4.0/26

 

step2
映射my.conf
master节点:my-m.conf

# Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

#
# The MySQL Server configuration file.
#
# For explanations see
# http://dev.mysql.com/doc/mysql/en/server-system-variables.html

[mysqld]
log-bin=mysql-bin
pid-file = /var/run/mysqld/mysqld.pid
socket = /var/run/mysqld/mysqld.sock
datadir = /var/lib/mysql
secure-file-priv= NULL
server-id=1
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
!includedir /etc/mysql/conf.d/

 

slave节点
my-s1.conf

# Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

#
# The MySQL Server configuration file.
#
# For explanations see
# http://dev.mysql.com/doc/mysql/en/server-system-variables.html

[mysqld]
pid-file = /var/run/mysqld/mysqld.pid
socket = /var/run/mysqld/mysqld.sock
datadir = /var/lib/mysql
secure-file-priv= NULL
server-id=2
relay_log_recovery=0
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0

# Custom config should go here
!includedir /etc/mysql/conf.d/

 

slave2 同上区别在 server-id=2这儿不能重复

step3

docker-compose up -d

step4 主节点操作

docker-compose exec mysql-master /bin/sh
mysql -uroot -p123456

或用navicat 输入以下

GRANT REPLICATION SLAVE ON *.* TO ‘在这儿设置你的账号’@’%’ IDENTIFIED BY ‘这儿设置你的密码’;
可以通过
show master status;
查看状态

step5 slave节点操作
首先进入slave1 节点

>stop slave;

>CHANGE MASTER TO
MASTER_HOST='172.19.4.24',
MASTER_PORT=3306,
MASTER_USER='你设置的账号',
MASTER_PASSWORD='你设置的密码',
MASTER_LOG_FILE='mysql-bin.000001',
MASTER_LOG_POS=1718;

>start slave;

 

执行以下
show slave status;

show slave status\G
可以看到

*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.1.1
Master_User: root
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000002
Read_Master_Log_Pos: 2240619
Relay_Log_File: eab8e7c281e7-relay-bin.000002
Relay_Log_Pos: 97203
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: 2240619
Relay_Log_Space: 97417
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: a1ce2ca7-cc5b-11e8-a2e4-0242ac120002
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 (0.00 sec)

 

则设置成功。
下一步的读写分离后续附上

几个搭建时的注意点
主从应该只是拷贝了操作语句来执行,从表与主表的结构一定要完全一致,包括:数据库结构、表结构、等构建好主从节点后两边一致,再做修改,从数据库都会修改的。
主节点的 Position: 会因为数据库修改而不断变动,等待一个稳定时机,或者停止主节点的修改,再执行绑定。
读写分离
目前使用最简单的读写分离,select走slave 更新操作走master节点
bug解决
生产环境几次后出现的问题
1872 – Slave failed to initialize relay log info structure from the repository, Time: 0.005000s导致无法启动slave节点
解决方案:reset slave all重置就好了
参考链接:https://blog.csdn.net/fighterandknight/article/details/80601968

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版权声明:本文为CSDN博主「zwww7766」的原创文章,遵循 CC 4.0 BY-SA 版权协议,转载请附上原文出处链接及本声明。
原文链接:https://blog.csdn.net/qq_35916684/article/details/84109197

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