正文
mysql 8.0 主从复制配置
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背景：
主库：
192.168.211.128 从库：
192.168.211.129 一、关闭防火墙
[root@node01 ~]# systemctl disable firewalld
[root@node01 ~]# systemctl stop firewalld
[root@node01 ~]# systemctl status firewalld
● firewalld.service - firewalld - dynamic firewall daemon
Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled)
Active: inactive (dead)
Docs: man:firewalld(1) 二、关闭selinux
[root@node01 ~]# vi /etc/selinux/config
SELINUX=disabled
[root@node01 ~]# getenforce
Disabled 临时关闭selinux
[root@node01 ~]# setenforce 0
setenforce: SELinux is disabled 三、卸载centos自带数据库
[root@node01 ~]# rpm -qa | grep mariadb | xargs -i yum remove -y {}
Loaded plugins: fastestmirror
Resolving Dependencies
--> Running transaction check
---> Package mariadb-libs.x86_64 1:5.5.56-2.el7 will be erased
--> Processing Dependency: libmysqlclient.so.18()(64bit) for package: 2:postfix-2.10.1-6.el7.x86_64
--> Processing Dependency: libmysqlclient.so.18(libmysqlclient_18)(64bit) for package: 2:postfix-2.10.1-6.el7.x86_64
--> Running transaction check
---> Package postfix.x86_64 2:2.10.1-6.el7 will be erased
--> Finished Dependency Resolution Dependencies Resolved =======================================================================================
Package Arch Version Repository Size
=======================================================================================
Removing:
mariadb-libs x86_64 1:5.5.56-2.el7 @anaconda 4.4 M
Removing for dependencies:
postfix x86_64 2:2.10.1-6.el7 @anaconda 12 M Transaction Summary
=======================================================================================
Remove 1 Package (+1 Dependent package) Installed size: 17 M
Downloading packages:
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Erasing : 2:postfix-2.10.1-6.el7.x86_64 1/2
Erasing : 1:mariadb-libs-5.5.56-2.el7.x86_64 2/2
Verifying : 1:mariadb-libs-5.5.56-2.el7.x86_64 1/2
Verifying : 2:postfix-2.10.1-6.el7.x86_64 2/2 Removed:
mariadb-libs.x86_64 1:5.5.56-2.el7 Dependency Removed:
postfix.x86_64 2:2.10.1-6.el7 Complete!
[root@node01 ~]# rpm -qa | grep mariadb
[root@node01 ~]# 四、添加用户组及用户
[root@node01 ~]# groupadd mysql
[root@node01 ~]# useradd -g mysql mysql
[root@node01 ~]# id mysql
uid=1000(mysql) gid=1000(mysql) groups=1000(mysql)
[root@node01 ~]# passwd mysql
Changing password for user mysql.
New password:
BAD PASSWORD: The password is shorter than 8 characters
Retype new password:
passwd: all authentication tokens updated successfully.
[root@node01 ~]# 五、创建mysql相关目录
[root@node01 ~]# mkdir -p /data/mysql3306/data
[root@node01 ~]# mkdir -p /data/mysql3306/binlog
[root@node01 ~]# chown -R mysql.mysql /data* 六、下载mysql8.0安装包，上传并解压 下载地址：
https://downloads.mysql.com/archives/get/p/23/file/mysql-8.0.18-linux-glibc2.12-x86_64.tar 解压mysql安装包:
[mysql@node01 ~]$ tar -xvf mysql-8.0.18-linux-glibc2.12-x86_64.tar.xz 七、创建mysql安装包软连接
[root@node01 data]# ln -s /data/mysql-8.0.18-linux-glibc2.12-x86_64 /usr/local/mysql
[root@node01 data]# chown -R mysql.mysql /usr/local/mysql* 八、创建my.cnf参数文件
[root@node01 data]# vi /etc/my.cnf
[client]
port=3306
socket=/tmp/mysql.sock [mysqld]
port=3306
user=mysql
server_id=1
socket=/tmp/mysql.sock
basedir=/usr/local/mysql
datadir=/data/mysql3306/data
log-error=/data/mysql3306/data/error.log
log_bin=/data/mysql3306/binlog/mysql-bin 九、配置用户环境变量
[mysql@node01 ~]$ vi .bash_profile
# .bash_profile # Get the aliases and functions
if [ -f ~/.bashrc ]; then
. ~/.bashrc
fi # User specific environment and startup programs PATH=$PATH:$HOME/.local/bin:$HOME/bin export PATH
export MYSQL_HOME=/usr/local/mysql
export PATH=$PATH:$MYSQL_HOME/bin [root@node02 ~]# vi /etc/profile
export MYSQL_HOME=/usr/local/mysql
export PATH=$PATH:$MYSQL_HOME/bin 十、初始化mysql数据库
[mysql@node01 ~]$ mysqld --initialize-insecure --user=mysql --basedir=/usr/local/mysql --datadir=/data/mysql3306/data 十一、添加mysql服务
[root@node01 data]# cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysqld 十二、启动mysql数据库、登录数据库
[mysql@node01 ~]$ /etc/init.d/mysqld start
Starting MySQL.. SUCCESS!
[mysql@node01 ~]$ mysql -uroot -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 8
Server version: 8.0.18 MySQL Community Server - GPL Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved. 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> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| sys |
+--------------------+
4 rows in set (0.00 sec) mysql> 十三、配置mysql数据库自动启动
[root@node01 data]# chkconfig --add mysqld
[root@node01 data]# chkconfig --list Note: This output shows SysV services only and does not include native
systemd services. SysV configuration data might be overridden by native
systemd configuration. If you want to list systemd services use 'systemctl list-unit-files'.
To see services enabled on particular target use
'systemctl list-dependencies [target]'. mysqld 0:off 1:off 2:on 3:on 4:on 5:on 6:off
netconsole 0:off 1:off 2:off 3:off 4:off 5:off 6:off
network 0:off 1:off 2:on 3:on 4:on 5:on 6:off
十四、从库配置跟主库一致，只是参数文件不一样
[root@node02 ~]# cat /etc/my.cnf
[client]
port=3306
socket=/tmp/mysql.sock [mysqld]
port=3306
user=mysql
server_id=2
socket=/tmp/mysql.sock
basedir=/usr/local/mysql
datadir=/data/mysql3306/data
log-error=/data/mysql3306/data/error.log
log_bin=/data/mysql3306/binlog/mysql-bin 十五、主库创建用户repl@%并授权
mysql> create user 'repl'@'192.168.211.%' identified by 'mysql';
Query OK, 0 rows affected (0.31 sec) mysql> grant replication slave on *.* to 'repl'@'192.168.211.%';
Query OK, 0 rows affected (0.05 sec) mysql> flush privileges;
Query OK, 0 rows affected (0.01 sec) 十六、关闭主从数据库
[root@node01 data]# /etc/init.d/mysqld stop
Shutting down MySQL... SUCCESS! [root@node02 ~]# /etc/init.d/mysqld stop
Shutting down MySQL. SUCCESS! 十七、修改主从库参数文件
主库：
[client]
port=3306
socket=/tmp/mysql.sock [mysqld]
port=3306
user=mysql
server_id=1
socket=/tmp/mysql.sock
basedir=/usr/local/mysql
datadir=/data/mysql3306/data
log-error=/data/mysql3306/data/error.log
log_bin=/data/mysql3306/binlog/mysql-bin
gtid_mode=ON
enforce_gtid_consistency=ON
log_slave_updates=1 从库：
[client]
port=3306
socket=/tmp/mysql.sock [mysqld]
port=3306
user=mysql
server_id=2
socket=/tmp/mysql.sock
basedir=/usr/local/mysql
datadir=/data/mysql3306/data
log-error=/data/mysql3306/data/error.log
log_bin=/data/mysql3306/binlog/mysql-bin
gtid_mode=ON
enforce_gtid_consistency=ON
log_slave_updates=1 十八、开启数据库
[root@node01 data]# /etc/init.d/mysqld start
Starting MySQL... SUCCESS! [root@node02 ~]# /etc/init.d/mysqld start
Starting MySQL.. SUCCESS! 十九、从库开启主从复制
mysql> CHANGE MASTER TO
-> MASTER_HOST='192.168.211.128',
-> MASTER_USER='repl',
-> MASTER_PASSWORD='mysql',
-> MASTER_PORT=3306,
-> MASTER_AUTO_POSITION=1;
Query OK, 0 rows affected, 2 warnings (0.02 sec) mysql> start slave;
Query OK, 0 rows affected (0.01 sec) mysql> show slave status\G;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.211.128
Master_User: repl
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000001
Read_Master_Log_Pos: 155
Relay_Log_File: node02-relay-bin.000002
Relay_Log_Pos: 369
Relay_Master_Log_File: mysql-bin.000001
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: 155
Relay_Log_Space: 578
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: d282ef12-ff38-11ea-bcf5-000c291cc010
Master_Info_File: mysql.slave_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: 1
Replicate_Rewrite_DB:
Channel_Name:
Master_TLS_Version:
Master_public_key_path:
Get_master_public_key: 0
Network_Namespace:
1 row in set (0.00 sec) ERROR:
No query specified mysql>
