两台 mysql 虚拟机配置

名称	ip	系统
mysql-master	192.168.0.10	ubuntu 18.04
mysql-salve	192.168.0.9	ubuntu 18.04

一、主服务配置

1. 修改配置文件 /etc/mysql/mysql.conf.d/mysqld.cnf

bind-address        = 192.168.0.10
server-id       = 1
log_bin         = /var/log/mysql/mysql-bin.log

2. 重启

service mysql restart

3. 创建从服务用户
   ： IP 为从服务的 IP 地址

create user 'synchro'@'192.168.0.9' identified by 'xxxxxxx';  

4. 授权

# 授权全部库
grant replication slave on *.* to 'synchro'@'192.168.0.9';
# 刷新权限
flush privileges;

5. 查看 master 信息
   ：这里的 Position 和 File 的值在从服务中会用到

mysql> show master status \G;
*************************** 1. row ***************************
File: mysql-bin.000001
Position: 179274
Binlog_Do_DB:
Binlog_Ignore_DB:
Executed_Gtid_Set:

二、从服务配置

1. 修改配置文件 /etc/mysql/mysql.conf.d/mysqld.cnf

bind-address        = 192.168.0.9
server-id       = 2

2. 重启

service mysql restart

3. 暂停 slave

mysql> stop slave;

4. 配置 master 数据同步

change
master to
master_host='192.168.0.10', 
master_port=3306,
master_user='synchro',
master_password='xxxxx',
master_log_file='mysql-bin.000001',
master_log_pos=179274;

：这里的 master_host 是主服务的 IP
：这里的 master_log_pos 是主服务中的 Position
：这里的 master_log_file 是主服务的 File

5. 启动 slave

mysql> start slave;

6. 查看同步信息
   这里看
   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: 192.168.0.10
                  Master_User: synch
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000001
          Read_Master_Log_Pos: 179274
               Relay_Log_File: mysql-slave-relay-bin.000002
                Relay_Log_Pos: 320
        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: 179274
              Relay_Log_Space: 533
              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: c7142871-85ee-11ef-8b6a-5254009c932f
             Master_Info_File: /data/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:

三、链接失败

1. 尝试在从服务登录主服务 mysql

mysql -h 192.168.0.10 -u synch -p

2. 登录主服务 mysql 成功一般就是从服务中配置 master 有问题