uuid是每個mysql伺服器都唯一的,記錄在$datadir/auto.cnf中。如果複製結構中,任意兩臺伺服器uuid重複的話(比如直接冷備份時,auto.conf中的內容是一致的),在啟動複製功能的時候會報錯。這時可以刪除auto.conf檔案再重新啟動mysqld。
192.168.27.137 主
192.168.27.138 從
[root@localhost ~]# systemctl stop firewalld
[root@localhost ~]# setenforce 0
[root@localhost ~]# wget -i -c http://dev.mysql.com/get/mysql57-community-release-el7-10.noarch.rpm
[root@localhost ~]# yum -y install mysql57-community-release-el7-10.noarch.rpm
[root@localhost ~]# yum -y install mysql-community-server
[root@localhost ~]# systemctl start mysqld
5.7mysql首次登入需要修改密碼,先獲取密碼 grep password /var/log/mysqld.log 然後登入
[root@localhost ~]# grep "password" /var/log/mysqld.log
2020-11-10T05:10:23.949222Z 1 [Note] A temporary password is generated for root@localhost: Dod;Zt%Lp6kl
獲取到mysql初始密碼,登入mysql並修改密碼 mysql -uroot -p
輸入獲取到的密碼
進入資料庫後,執行修改密碼語句:
[root@localhost ~]# mysql -uroot -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 4
Server version: 5.7.32
Copyright (c) 2000, 2020, 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> alter user 'root'@'localhost' identified by '新密碼';
新密碼需要符合5.7的密碼複雜度要求,弱密碼用不了。
修改完密碼後,必須執行重新整理策略。
mysql>flush privileges;
mysql>exit
[root@localhost ~]# vim /etc/my.cnf
server-id=1 ##伺服器標識
binlog_format=row
log-bin=mysql-bin ##開啟二進位制紀錄檔
gtid_mode=ON ## 開啟gtid模式
enforce-gtid-consistency=true ## 強制gtid複製
[root@localhost ~]# systemctl restart mysqld
[root@localhost ~]# mysql -uroot -p
Enter password:
mysql> grant all on *.* to 'tom'@'%' identified by 'H9VtyDlad!T';
Query OK, 0 rows affected, 1 warning (0.00 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
[root@localhost ~]# vim /etc/my.cnf
server-id=2 ##伺服器標識
binlog_format=row
gtid_mode=ON ## 開啟gtid模式
enforce-gtid-consistency=true ## 強制gtid複製
重新啟動
[root@localhost ~]# systemctl restart mysqld
[root@localhost ~]# mysql -uroot -p
Enter password:
mysql> change master to
-> master_host='192.168.27.137',
-> master_user='tom',
-> master_password='H9VtyDlad!T',
-> master_auto_position=1;
Query OK, 0 rows affected, 2 warnings (0.01 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: 192.168.27.137
Master_User: tom
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000001
Read_Master_Log_Pos: 585
Relay_Log_File: localhost-relay-bin.000002
Relay_Log_Pos: 798
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: 585
Relay_Log_Space: 1009
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: 0979161c-2313-11eb-b4d2-000c295cd742
Master_Info_File: /var/lib/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: 0979161c-2313-11eb-b4d2-000c295cd742:1-2
Executed_Gtid_Set: 0979161c-2313-11eb-b4d2-000c295cd742:1-2
Auto_Position: 1
Replicate_Rewrite_DB:
Channel_Name:
Master_TLS_Version:
1 row in set (0.00 sec)