mysql 主从搭建

free -h

sh Installation.sh

cd /

ls -lrth

service mysql status

mysql -uroot -p

source /etc/profile

cd /data/log

cat error.err | grep "password is generated for root@localhost"

alter user user() identified by 'Etve3grTfEFso6jl';

主库设置：

备份主库mysql 文件，

du -sh mysql命令查看数据目录大小，

du -sh *|sort -rn|grep 'G' 过滤大于G的

tail -n 20 20240416.sql ，查看文件最后20行

mysqldump -uroot -p --single-transaction --master-data=2 -R -E --triggers -hlocalhost -A >20240412.sql

在执行mysqldump命令时候报如下错误：

root@localhost \~\]# mysqldump -uroot -p\*\*\*\*\*\*\* --all-databases\> all.sql mysqldump: Got error: 2002: Can't connect to local MySQL server through socket '/data/mysql/mysql.sock' (2) when trying to connect 找到正确的套接字的路径： \[root@localhost \~\]# netstat -ln \| grep mysql unix 2 \[ ACC \] STREAM LISTENING 2447213870 /data/mysql/data/mysql.sock 再运行dump命令： mysqldump --socket=/data/mysql/data/mysql.sock -uroot -p --single-transaction --master-data=2 -hlocalhost -A \>20240416.sql --传输备份文件到从服务器 scp 20230905bak.sql [email protected]:/root scp 20240416.sql [email protected]:/backup mysqldump -uetl_user -p --single-transaction --master-data=2 -R -E --triggers -hlocalhost -A \>20230905bak.sql ## 如果要将mysql 数据库进行备份： mysqldump -uetl_user -p mysql \> mysql20230904bak.sql 看内容 less 20240416.sql 注释GTID ![在这里插入图片描述](https://file.jishuzhan.net/article/1781695933281472514/b7f7325fddb33ed047432d660c6152e4.webp) 从库还原数据执行： mysql -uroot -pAbc12345!@# -h127.0.0.1 --登录mysql source /backup/20240416.sql --还原mysql备份文件 reset master; stop slave ; reset slave all; --GTID配置 SET @@GLOBAL.GTID_PURGED='2f97bf10-0acd-11ea-912f-6c92bf64e6fa:1-8396510, 444d8cf8-6d79-11ea-87e6-00505690d903:1-6853230, 444d8cf8-6d79-11ea-87e6-00505690d908:1-100549285, 759ef2f1-adf1-11e9-a354-501d939ca2ae:1-59073'; change master to master_host='10.51.1.133',master_user='root',master_password='Etve3grTfEFso6jl',master_port=3306,MASTER_AUTO_POSITION = 1; ---pos配置 change master to master_host='10.50.104.161',master_user=root,master_password='4aeakcfCPK89xmZnoFMsC99!3gvsyskY',master_log_file='mysql-bin.000239',master_log_pos=355304605; start slave; show slave status \\G 如果在其他服务器访问 从库报错1130 - Host '10.50.98.33' is not allowed to connect to this MySQL server，需要授权 grant all privileges on *.* to 'db_server'@'%' identified by 'FH6mnMBc!OCXzVH' with grant option; FLUSH PRIVILEGES;