What's the easiest way to rotate nginx log files monthly?

Question

In OpenBSD, there's no logrotate in ports, and newsyslog seems to have limited features as far as monthly rotation of a huge number of log files is concerned.

I have a lot of domains, a huge number of nginx log-files names like /var/www/logs/*/*.{access,error}.log.

I'm thinking a small shell script and cronjob. What would be the easiest way to rotate them all monthly, and append the prior month to the filename?

Answer 1

I think the following crontab should work:

0   0   1   *   *   /etc/nginx/logrotate.monthly.sh

Where /etc/nginx/logrotate.monthly.sh should have the following content:

find /var/www/logs/ -name "*log" -exec \
mv -i {} {}.`sh -c 'date -r $(expr $(date +%s) - 1209600) +%Y-%m'` \; ; \
kill -USR1 `cat /var/run/nginx.pid`

The -i option to mv is important to ensure that files don't get overwritten. We get the date for the filename by moving today's date two weeks back (as per « tcsh: print date 2 weeks ago in shell »).

Answer 2

please check also this misc@ thread.

(also keep in mind the caveat documented in the FAQ about privseped apache and the need for a small time window upon the move.)