简单搭建主从复制

1.首先初始化两个库

[mysql@localhost ~]$ cat initdb.info 

#IP SOFT_DIR INSTANCE_BASE_DIR INSTANCE_NAME_PREFIX INSTANCE_NAME INSTANCE_PORT SERVER_ID ADMIN_USER ADMIN_PASSWD

192.168.80.154 /usr/local/mysql-5.7.23/ /home/mysql/mysqldb db master   45678 4567801 root oracle

192.168.80.154 /usr/local/mysql-5.7.23/ /home/mysql/mysqldb db slave    34567 3456701 root oracle

#192.168.80.154 /usr/local/mysql-5.7.23/ /home/mysql/mysqldb db slave01    33344 3334401 root oracle

[mysql@localhost ~]$ sh init57_v1.3_20180402.sh 

 2.主库创建用户

create user master@'%' identified by 'oracle';

grant all privileges on *.* to master@’%‘；

3.从库中执行命令

CHANGE MASTER TO MASTER_HOST='192.168.80.154',MASTER_USER='master',MASTER_PASSWORD='oracle',MASTER_PORT=45678,MASTER_AUTO_POSITION=1;

4.从库中执行start slave；

查看是否主从连接完成

show slave status；显示两个yes即为成功

mysql> show slave statusG

*************************** 1. row ***************************

               Slave_IO_State: Waiting for master to send event

                  Master_Host: 192.168.80.154

                  Master_User: master

                  Master_Port: 45678

                Connect_Retry: 60

              Master_Log_File: master-bin.000002

          Read_Master_Log_Pos: 596

               Relay_Log_File: slave-relay.000002

                Relay_Log_Pos: 811

        Relay_Master_Log_File: master-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: 596

              Relay_Log_Space: 1014

              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: 4567801

                  Master_UUID: a2c6c2c4-a7c0-11e8-bd23-000c29da9911

             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: a2c6c2c4-a7c0-11e8-bd23-000c29da9911:1-2

            Executed_Gtid_Set: a2c6c2c4-a7c0-11e8-bd23-000c29da9911:1-2

                Auto_Position: 1

         Replicate_Rewrite_DB: 

                 Channel_Name: 

           Master_TLS_Version: 

1 row in set (0.00 sec)

5.主库中创建库添加数据验证从库中是否增加数据

 主库中

mysql> create database test; 

Query OK, 1 row affected (0.01 sec)

mysql> use test;

Database changed

mysql> create table t1(x int not null auto_increment primary key);

Query OK, 0 rows affected (0.05 sec)

mysql> ^C

mysql> ^C

mysql> insert into t1 values();

Query OK, 1 row affected (0.18 sec)

mysql> insert into t1 values();

Query OK, 1 row affected (0.01 sec)

mysql> insert into t1 values();

Query OK, 1 row affected (0.01 sec)

 从库中

mysql> select @@port;

+--------+

| @@port |

+--------+

|  34567 |

+--------+

1 row in set (0.00 sec)

mysql> use test;

Reading table information for completion of table and column names

You can turn off this feature to get a quicker startup with -A

Database changed

mysql> select * from t1;

+---+

| x |

+---+

| 1 |

| 2 |

| 3 |

+---+

3 rows in set (0.00 sec)

主从搭建成功