[CentOS] CentOS 8.2: error running non-shared postrotate script for /var/log/mysql/mysqld.log

Mon Dec 7 23:13:39 UTC 2020
Tony Mountifield <tony at softins.co.uk>

In article <CAADeyWiCwqYtdnkAkSkoKzmh8jmQobmCx6ehz0XOwJZB1HuFtg at mail.gmail.com>,
Alexander Farber <alexander.farber at gmail.com> wrote:
> Hello fellow CentOS users!
> I have installed CentOS 8.2.2004 with the following packages:
> mysql-common-8.0.21-1.module_el8.2.0+493+63b41e36.x86_64
> mysql-8.0.21-1.module_el8.2.0+493+63b41e36.x86_64
> mysql-errmsg-8.0.21-1.module_el8.2.0+493+63b41e36.x86_64
> mysql-server-8.0.21-1.module_el8.2.0+493+63b41e36.x86_64
> Then I have run mysql_secure_installation and among other things set the
> root password for MySQL
> As result I am greeted with the following anachron mail every morning:
> /etc/cron.daily/logrotate:
>  mysqladmin: connect to server at 'localhost' failed
> error: 'Access denied for user 'root'@'localhost' (using password: NO)'
> error: error running non-shared postrotate script for
> /var/log/mysql/mysqld.log of '/var/log/mysql/mysqld.log '
> I understand that the reason is me having set the root password for MySQL.
> But my question is how to provide the password to postrotate without
> disclosing it too much?

Create a file .my.cnf owned by root with permission 600, containing these lines:

user = root
password = YourMySqlRootPassword

You need to put it in / or in /root - I usually do both, as I think logrotate
has / as it's home dir instead of /root.

Then logrotate can call mysqladmin without having to give a password.

Tony Mountifield
Work: tony at softins.co.uk - http://www.softins.co.uk
Play: tony at mountifield.org - http://tony.mountifield.org