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MySQL5.7.18のログローテートの設定

Posted at

やること

CentOS7の上のMySQL5.7.18のログローテートの設定をします

以下のファイルがコメントアウトされているので、コメントをはずします

/etc/logrotate.d/mysql

/var/log/mysqld.log {
        create 640 mysql mysql
        dateext (追加)
        notifempty
        daily
        rotate 7
        missingok
        compress
    postrotate
       # just if mysqld is really running
       if test -x /usr/bin/mysqladmin && \
          /usr/bin/mysqladmin ping &>/dev/null
       then
          /usr/bin/mysqladmin flush-logs
       fi
    endscript
}

ユーザーとパスワードの設定をします。セキュリティ的にはrootユーザーではやらない方が良いです。

mysql_config_editor set --login-path=client --user=root --host=localhost --password

~/.mylogin.cnfに暗号化されたパスワードが設定されます。これでOK

テストだけする場合

# logrotate -dv /etc/logrotate.d/mysql

実際にローテートしてみる

# logrotate -v /etc/logrotate.d/mysql
reading config file /etc/logrotate.d/mysql
Allocating hash table for state file, size 15360 B

Handling 1 logs

rotating pattern: /var/log/mysqld.log  after 1 days (7 rotations)
empty log files are not rotated, old logs are removed
considering log /var/log/mysqld.log
  log needs rotating
rotating log /var/log/mysqld.log, log->rotateCount is 7
dateext suffix '-20170529'
glob pattern '-[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]'
glob finding old rotated logs failed
renaming /var/log/mysqld.log to /var/log/mysqld.log-20170529
creating new /var/log/mysqld.log mode = 0640 uid = 27 gid = 27
running postrotate script
compressing log with: /bin/gzip

できました

-rw-r-----   1 mysql  mysql        0  5月 29 16:44 mysqld.log
-rw-r-----   1 mysql  mysql   159660  5月 29 16:12 mysqld.log-20170529.gz

ローテートしない場合はこのあたりの日付をバックデートして実行してみましょう

vi /var/lib/logrotate.status

logrotate state -- version 2
"/var/log/mysqld.log" 2017-5-29-16:44:32
"/var/log/nginx/access.log" 2017-5-14-8:50:42
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