[SOLVED] Confusion with Linux Logrotate

Issue

There is a linux mongo instance wherein the mongo logrotation has been set:

/etc/logrotate.d/mongodb

/var/log/mongodb/mongod.log {
   rotate 7
   daily
   size 500M
   copytruncate
   missingok
   create 0600 mongodb mongodb
   dateext
   delaycompress
   compress
}

But the /etc/logrotate.conf file has the following configuration:

weekly

su root syslog

rotate 4

create

include /etc/logrotate.d

/var/log/wtmp {
    missingok
    monthly
    create 0664 root utmp
    rotate 1
}

/var/log/btmp {
    missingok
    monthly
    create 0660 root utmp
    rotate 1
}

The question here is, will the mongo logrotation happen daily as specified in /etc/logrotate.d/mongodb or will it happen weekly as it has been specified in /etc/logrotate.conf ?

Also how do I know/ensure if the logrotation is actually happening, through cron ?

Solution

logrotate must be run by cron. On Ubuntu 18.04 cron runs logrotate daily, see /etc/crontab and /etc/cron.daily. You can also run it manually.

Global weekly is the default, /etc/logrotate.d/mongodb overrides it with daily.

Answered By - Maxim Egorushkin

Answer Checked By - Marilyn (WPSolving Volunteer)