一、主服务器准备

1.1、环境准备

两台主机器ip分别为

100.100.100.105 (主1)
100.100.100.106（主2）

安装 MysqL

[root@centos ~]# yum install MysqL-server MysqL-client -y
[root@centos ~]# service MysqLd start
[root@centos ~]# /usr/bin/MysqLadmin -u root password '123456'

1.2、修改配置文件

100.100.100.105

[root@centos ~]# vim /etc/my.cnf
log-bin=MysqL-bin
server-id=105

100.100.100.106

[root@centos ~]# vim /etc/my.cnf
log-bin=MysqL-bin
server-id=106

1.3、添加MysqL授权用户

MysqL> grant replication slave on *.* to slave@'100.100.100.103' identified by '123456';

1.4、查看主服务器信息

MysqL> show master status;
+------------------+----------+--------------+------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| MysqL-bin.000006 |      261 |              |                  |
+------------------+----------+--------------+------------------+

MysqL> show master status;
+------------------+----------+--------------+------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| MysqL-bin.000003 |      261 |              |                  |
+------------------+----------+--------------+------------------+

二、从服务器准备

2.1、环境准备

从机器ip分别为

100.100.100.103

安装 MysqL

[root@centos ~]# yum install MysqL-server MysqL-client -y
#这里我们不直接启动MysqL，而是使用多进程的方法进行写分离。

2.2、编辑配置文件

[root@centos ~]# vim /etc/my.cnf

[MysqLd_multi]
MysqLd=/usr/bin/MysqLd_safe
MysqLadmin=/usr/bin/MysqLadmin
log=/tmp/multi.log


[MysqLd05]
port=3306
datadir=/var/lib/MysqLa/
pid-file=/var/lib/MysqLa/MysqLd.pid
socket=/var/lib/MysqLa/MysqL.sock
user=MysqL
server-id=20
#replicate-do-db=test
binlog-ignore-db=MysqL
binlog-ignore-db=infogmation_schema


[MysqLd06]
port=3307
datadir=/var/lib/MysqLb/
pid-file=/var/lib/MysqLb/MysqLd.pid
socket=/var/lib/MysqLb/MysqL.sock
user=MysqL
server-id=20
#replicate-do-db=test
binlog-ignore-db=MysqL
binlog-ignore-db=infogmation_schema

2.3、以不同的用户目录进行初始化

[root@centos ~]# MysqL_install_db  --datadir=/var/lib/MysqLa --user=MysqL
[root@centos ~]# MysqL_install_db  --datadir=/var/lib/MysqLb --user=MysqL
[root@centos ~]# chown -R MysqL /var/lib/MysqLa/
[root@centos ~]# chown -R MysqL /var/lib/MysqLb/

2.4、启动进程

[root@centos ~]# MysqLd_multi --defaults-file=/etc/my.cnf start 05
[root@centos ~]# MysqLd_multi --defaults-file=/etc/my.cnf start 06
[root@centos ~]# netstat -tunlp|grep MysqLd
tcp        0      0 0.0.0.0:3306                0.0.0.0:*                   LISTEN      1864/MysqLd         
tcp        0      0 0.0.0.0:3307                0.0.0.0:*                   LISTEN      3563/MysqLd 

2.5、登录子进程，进行配置

[root@centos ~]# MysqL -uroot -P3306 -S /var/lib/MysqLa/MysqL.sock
MysqL> change master to
master_user='slave',master_password='123456',master_host='100.100.100.105',master_log_file='MysqL-bin.000006',master_log_pos=261;

MysqL> start slave;

[root@centos ~]# MysqL -uroot -P3307 -S /var/lib/MysqLb/MysqL.sock
MysqL> change master to
master_user='slave',master_host='100.100.100.106',master_log_file='MysqL-bin.000003',master_log_pos=261;

MysqL> start slave;

2.5、出现如下，则成功

MysqL> show slave status\G;
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 100.100.100.105
                  Master_User: slave
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: MysqL-bin.000006
          Read_Master_Log_Pos: 261
               Relay_Log_File: MysqLd-relay-bin.000002
                Relay_Log_Pos: 251
        Relay_Master_Log_File: MysqL-bin.000006
             Slave_IO_Running: Yes
            Slave_sql_Running: Yes

MysqL> show slave status\G;
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 100.100.100.106
                  Master_User: slave
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: MysqL-bin.000003
          Read_Master_Log_Pos: 261
               Relay_Log_File: MysqLd-relay-bin.000002
                Relay_Log_Pos: 251
        Relay_Master_Log_File: MysqL-bin.000003
             Slave_IO_Running: Yes
            Slave_sql_Running: Yes