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This article mainly introduces the method of CentOS7 enabling MySQL8 master-slave backup and regular full backup every day, which has a certain reference value, and interested friends can refer to it. I hope you will gain a lot after reading this article.

Note 1: solve the problem of slow connection to MySQL database

Vim / etc/my.cnf

Add content: skip-name-resolve, restart the database.

Note 2: (password tape! Or other special matches, preceded by\, for example, 123 / 321 / color-> 123\! 321)

1. Master-slave backup

Add content under vim / etc/my.cnf [mysqld]: server-id = 1log-bin=mysql-binrelay-log = mysql-relay-binreplicate-wild-ignore-table=mysql.%replicate-wild-ignore-table=test.%replicate-wild-ignore-table=information_schema.% from database: vim .etc / my.cnf [mysqld]: server-id = 2 log-bin=mysql-binrelay-log = mysql-relay-binreplicate-wild-ignore-table=mysql.%replicate-wild-ignore -table=test.% replicate-wild-ignore-table=information_schema.% restart master-slave database login master database mysql-uusername-ppasswordmysql > show master status Find master_log_file, master_log_pos (usually mysql-bin.000001 and 155s) mysql > change master to\ mysql > master_host=' from database IP', mysql > master_user=' from database user', mysql > master_password=' from database password', mysql > master_log_file=' from database master_log_file', mysql > master_log_pos=' from database master_log_pos';mysql > start slave;mysql > show slave status\ G login from database mysql- uusername-ppasswordmysql > show master status Find master_log_file, master_log_pos (usually mysql-bin.000001) mysql > change master to\ mysql > master_host=' master database IP', mysql > master_user=' master database user', mysql > master_password=' master database password', mysql > master_log_file=' master database master_log_file', mysql > master_log_pos=' master database master_log_pos';mysql > start slave;mysql > show slave status\ G

At this point, the master-slave backup of the database has been opened successfully, hurry up to try the effect!

2. Full backup on a daily basis

Cd.. / usr/local/src/dbback if there is no dbback, add a new folder vi bkDatabaseName.sh (no new file will be added automatically) copy the contents: #! / bin/bashsource / etc/profilemysqldump-uusername-ppassword DatabaseName | gzip > / usr/local/src/dbback/DatabaseName_$ (date +% Y%m%d_%H%M%S) .sql.gz save. Add executable permissions: chmod Ubunx bkDatabaseName.sh executes after adding executable permissions to see if there are any errors in the script and whether it can be used properly;. / bkDatabaseName.sh then check to see if there are any compressed files to add scheduled tasks

1. Install crontab

Download crontab: click to download

Download and put it in the / usr/local/src/crontab directory

Cd.. / usr/local/src/crontab

Installation

Rpm-ivh-- nodeps-- force * .rpm

Add scheduled task

Execute the command:

Crontab-e

Add: (backup is performed at 1 am every day)

0 1 *.. / usr/local/src/dbback/bkDatabaseName.sh

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