主从复制
环境
两台机器：
主：[root@master ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN group default qlen 1000
link/ether 00:0c:29:f1:68:6c brd ff:ff:ff:ff:ff:ff
inet 192.168.10.17/24 brd 192.168.10.255 scope global noprefixroute ens33
valid_lft forever preferred_lft forever
inet6 fe80::27c:fe2e:4d0a:cad2/64 scope link noprefixroute
valid_lft forever preferred_lft forever
备：[root@save-1 ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN group default qlen 1000
link/ether 00:0c:29:cb:cf:38 brd ff:ff:ff:ff:ff:ff
inet 192.168.10.18/24 brd 192.168.10.255 scope global noprefixroute ens33
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fecb:cf38/64 scope link
valid_lft forever preferred_lft forever
两台数据库执行以下sql语句
mysql> create database test; mysql> use test; Database changed mysql> create table emp (empno numeric(4) not null,ename varchar(10),job varchar(9),mgr numeric(4),hiredate datetime,sal numeric(7, 2),comm numeric(7, 2),deptno numeric(2)); Query OK, 0 rows affected (0.11 sec) mysql> select * from emp;
修改主节点上配置文件并重启
[root@master ~]# cat /etc/my.cnf [mysqld] datadir=/usr/local/mysql/data socket=/usr/local/mysql/mysql.sock symbolic-links=0 log-bin=mysql-bin-master #启用二进制日志 server-id=1 #本机数据库ID 标示 binlog-do-db=test #可以被从服务器复制的库, 二进制需要同步的数据库名 binlog-ignore-db=mysql #不可以被从服务器复制的库 [mysqld_safe] log-error=/usr/local/mysql/logs/error.log pid-file=/usr/local/mysql/mysql.pid [client] socket=/usr/local/mysql/mysql.sock [root@master ~]# /etc/init.d/mysqld restart 重启 Shutting down MySQL.. SUCCESS! Starting MySQL.. SUCCESS!
创建用户并刷新授权表
mysql> grant replication slave on *.* to slave@192.168.19.75 identified by "123456"; 用户创建错了
Query OK, 0 rows affected, 1 warning (0.02 sec)
mysql> grant replication slave on *.* to slave@192.168.10.18 identified by "123456";
Query OK, 0 rows affected, 1 warning (0.12 sec)
mysql> drop user slave@192.168.19.75 ; 删除错的用户
Query OK, 0 rows affected (0.01 sec)
mysql> select * from mysql.user where user='slave'G;
*************************** 1. row ***************************
Host: 192.168.10.18
User: slave
Select_priv: N
Insert_priv: N
Update_priv: N
Delete_priv: N
Create_priv: N
Drop_priv: N
Reload_priv: N
Shutdown_priv: N
Process_priv: N
File_priv: N
Grant_priv: N
References_priv: N
Index_priv: N
Alter_priv: N
Show_db_priv: N
Super_priv: N
Create_tmp_table_priv: N
Lock_tables_priv: N
Execute_priv: N
Repl_slave_priv: Y
Repl_client_priv: N
Create_view_priv: N
Show_view_priv: N
Create_routine_priv: N
Alter_routine_priv: N
Create_user_priv: N
Event_priv: N
Trigger_priv: N
Create_tablespace_priv: N
ssl_type:
ssl_cipher:
x509_issuer:
x509_subject:
max_questions: 0
max_updates: 0
max_connections: 0
max_user_connections: 0
plugin: mysql_native_password
authentication_string: *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9
password_expired: N
password_last_changed: 2020-04-15 10:07:09
password_lifetime: NULL
account_locked: N
1 row in set (0.00 sec)
ERROR:
No query specified
mysql> flush privileges; 刷新用户授权表
Query OK, 0 rows affected (0.01 sec)
从库修改配置文件并重启
[root@save-1 ~]# cat /etc/my.cnf [mysqld] datadir=/usr/local/mysql/data socket=/usr/local/mysql/mysql.sock symbolic-links=0 server-id=2 #添加server-id [mysqld_safe] log-error=/usr/local/mysql/logs/error.log pid-file=/usr/local/mysql/mysql.pid [client] socket=/usr/local/mysql/mysql.sock [root@save-1 ~]# /etc/init.d/mysqld restart Shutting down MySQL.... SUCCESS! Starting MySQL.. SUCCESS!
在从从主机测试主上新建的账户
[root@save-1 ~]# mysql -uslave -h192.168.10.17 -p123456 mysql: [Warning] Using a password on the command line interface can be insecure. Welcome to the MySQL monitor. Commands end with ; or g. Your MySQL connection id is 4 Server version: 5.7.18-log MySQL Community Server (GPL) Copyright (c) 2000, 2017, 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> quit Bye
主节点查看binlog 日志号
mysql> show master status; +-------------------------+----------+--------------+------------------+-------------------+ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set | +-------------------------+----------+--------------+------------------+-------------------+ | mysql-bin-master.000001 | 1359 | test | mysql | | +-------------------------+----------+--------------+------------------+-------------------+ 1 row in set (0.00 sec)
从节点设置连接主节点并开启主从复制
mysql> change master to master_host='192.168.10.17',master_port=3306,master_user='slave',master_password='123456',master_log_file='mysql-bin-master.000001',master_log_pos=1359;
Query OK, 0 rows affected, 2 warnings (0.08 sec)
mysql> start slave;
Query OK, 0 rows affected (0.33 sec)
mysql> show slave status G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.10.17
Master_User: slave
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin-master.000001
Read_Master_Log_Pos: 1359
Relay_Log_File: save-1-relay-bin.000002
Relay_Log_Pos: 327
Relay_Master_Log_File: mysql-bin-master.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: 1359
Relay_Log_Space: 535
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: 88976e86-7d66-11ea-967b-000c29f1686c
Master_Info_File: /usr/local/mysql/data/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:
1 row in set (0.00 sec)
主节点查看
mysql> show processlist G
*************************** 1. row ***************************
Id: 3
User: root
Host: localhost
db: NULL
Command: Query
Time: 0
State: starting
Info: show processlist
*************************** 2. row ***************************
Id: 5
User: slave
Host: 192.168.10.18:51098
db: NULL
Command: Sleep
Time: 3353
State:
Info: NULL
*************************** 3. row ***************************
Id: 6
User: slave
Host: 192.168.10.18:51100
db: NULL
Command: Binlog Dump
Time: 119
State: Master has sent all binlog to slave; waiting for more updates
Info: NULL
3 rows in set (0.00 sec)
主节点插入数据测试
mysql> insert into test.emp values (7499, 'ALLEN', 'SALESMAN', 7698, '1981-02-20', 1600, 300, 30); Query OK, 1 row affected (0.01 sec)
从节点查看
mysql> select * from emp; +-------+-------+----------+------+---------------------+---------+--------+--------+ | empno | ename | job | mgr | hiredate | sal | comm | deptno | +-------+-------+----------+------+---------------------+---------+--------+--------+ | 7369 | SMITH | CLERK | 7902 | 1980-12-17 00:00:00 | 800.00 | NULL | 20 | | 7499 | ALLEN | SALESMAN | 7698 | 1981-02-20 00:00:00 | 1600.00 | 300.00 | 30 | +-------+-------+----------+------+---------------------+---------+--------+--------+ 2 rows in set (0.00 sec)