MySQL主从
主机名 | IP | MySQL版本 | centos版本 |
server | 192.168.223.10 | mysql-5.6.47-linux-glibc2.12-x86_64.tar.gz | centos7.2-1511 |
client | 192.168.223.2 |
一 主节点配置
# .err结尾的文件为错误日志
[root@server ~]# ls -a /data/mysql/
. auto.cnf ib_logfile0 mysql server.err test
.. ibdata1 ib_logfile1 performance_schema server.pid
# 修改配置文件 /etc/my.cnf 确定有log_bin 和server_id
[root@server ~]# vim /etc/my.cnf
log_bin=wsw
server_id = 41
[root@server ~]# service mysqld restart
Shutting down MySQL.. SUCCESS!
Starting MySQL. SUCCESS!
# 可以看到多出log_bin名为开头的两个文件,wsw.000001、wsw.index
# 这两个文件为bin_log文件和索引文件 可以参考流程图
[root@server ~]# ls -a /data/mysql/
. ibdata1 mysql server.pid wsw.index
.. ib_logfile0 performance_schema test
auto.cnf ib_logfile1 server.err wsw.000001
# 创建主从用户 权限
mysql> grant replication slave on *.* to 'repl'@192.168.223.2 identified by '000000';
Query OK, 0 rows affected (0.00 sec)
# 刷新权限
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
# 查看server节点状态
mysql> show master status ;
+------------+----------+--------------+------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------+----------+--------------+------------------+-------------------+
| wsw.000001 | 410 | | | |
+------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)
二 从节点配置
# 从节点修改配置文件,确保有server_id 这个字段,
# 字段id不要一样,一般以ip最后一位结尾
[root@client ~]# vim /etc/my.cnf
server_id = 42
mysql> stop slave;
Query OK, 0 rows affected, 1 warning (0.00 sec)
# 创建连接, 主节点信息,bin_log文件名及大小
mysql> change master to master_host='192.168.200.41',master_user='repl',master_password='000000',master_log_file='wsw.000001',master_log_pos=410;
Query OK, 0 rows affected, 2 warnings (0.04 sec)
mysql> start slave;
Query OK, 0 rows affected (0.00 sec)
mysql> show slave status\G;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.223.10
Master_User: repl
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: wsw.000001
Read_Master_Log_Pos: 410
Relay_Log_File: client-relay-bin.000002
Relay_Log_Pos: 277
Relay_Master_Log_File: wsw.000001
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB: # 同步那些库 这些配置都是可以写在著配置文件的my.cnf
Replicate_Ignore_DB: # 不同步哪些库
Replicate_Do_Table: # 同步哪些表
Replicate_Ignore_Table:
Replicate_Wild_Do_Table: # 同步哪个库.表 常用
Replicate_Wild_Ignore_Table: # 忽略哪个库的哪个表
Last_Errno: 0 # 错误信息
Last_Error:
Skip_Counter: 0
Exec_Master_Log_Pos: 410
Relay_Log_Space: 451
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 # 线程错误信息
Last_IO_Error:
Last_SQL_Errno: 0
Last_SQL_Error:
Replicate_Ignore_Server_Ids:
Master_Server_Id: 41
Master_UUID: 197dfb61-1310-11ec-af29-000c29b5c42c
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 the slave I/O thread to update it
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
1 row in set (0.00 sec)
ERROR:
No query specified
三 测试
# 主节点创建一个库,测试操作在这个库进行
mysql> create database wsw;
Query OK, 1 row affected (0.00 sec)
# 从节点查看同步信息
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| test |
| wsw |
+--------------------+
5 rows in set (0.00 sec)
# 000001文件大小为主节点操作命令组成
# 可以通过bin_log文件恢复数据