mysql主从复制--一主一从

Posted 2020-10-05

1、启动实例3306和3307

2、检查主库配置
[[email protected] 3306]# egrep  "log-bin|server|sock"  my.cnf
socket          = /data/3306/mysql.sock
socket  = /application/mysql-5.5.32/tmp/mysql.sock
#socket  = /data/3306/mysql.sock
log-bin = /data/3306/mysql-bin
server-id = 1

查看配置是否生效
[[email protected] 3306]# mysql  -S  /application/mysql-5.5.32/tmp/mysql.sock  -e  "show variables like  ‘log_bin‘"
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| log_bin       | ON    |
+---------------+-------+

3、检查从库配置
[[email protected] 3307]# egrep  "log-bin|server|sock"  my.cnf
socket          = /data/3306/mysql.sock
socket  = /application/mysql-5.5.32/tmp/mysql.sock
#socket  = /data/3306/mysql.sock
log-bin = /data/3306/mysql-bin
server-id = 1


4、主库配置

mysql>grant  replication  slave  on  *.* to  ‘rep‘@‘%‘ identified by ‘oldboy123‘

mysql>flush  privileges

mysql>flush  table  with read  lock

mysql> show  master status;


mysqldump   -S  /application/mysql-5.5.32/tmp/mysql.sock   -A  -B  --events --master-data=2 > /tmp/rep1.sql

mysql>unlock  tables


5、恢复从库
mysql  -S  /data/3307/mysql.sock < /tmp/rep1.sql

cat |mysql  -S /data/3307/mysql.sock << EOF
CHANGE MASTER TO
MASTER_HOST=‘192.168.12.200‘,
MASTER_PORT=3306,-------------------------------注意不要用引号
MASTER_USER=‘rep‘,
MASTER_PASSWORD=‘oldboy123‘,
MASTER_LOG_FILE=‘mysql-bin.000016‘,
MASTER_LOG_POS=421;--------------------------注意不要用引号
EOF


mysql> start slave;

mysql> show  slave  status \G;
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.12.200
                  Master_User: rep
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000016
          Read_Master_Log_Pos: 421
               Relay_Log_File: relay-bin.000002
                Relay_Log_Pos: 253
        Relay_Master_Log_File: mysql-bin.000016
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes
              Replicate_Do_DB:
          Replicate_Ignore_DB: mysql
           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: 421
              Relay_Log_Space: 403
              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          

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