A production server generates a lot of logs, so it is necessary to rotate said logs. Logrotate is the main tool in SlapOS.

This tutorial explains how to add a logrotate entry inside the instances of your software release for remote monitoring.

Here are the commits introducing this functionality to html5as Software release: commit diff

In instance_html5as.cfg.in, add a logrotate entry for Nginx logs. Note the we use the post command as recommended in Nginx documentation to reopen log after rotation.

Log rotation can be further customized, you can check the list of parameter in instance-logrotate-base.cfg.in

# Monitor Stack also provides logrotate stack. We only need to extend
# the logrotate-entry-base defined in instance-logrotate-base.cfg.in .
# More parameters can be added following the logrotate-entry-base section
[logrotate-entry-nginx]
<= logrotate-entry-base
name = nginx
log = ${html5as:path_access_log} ${html5as:path_error_log}
post = kill -USR1 $(cat ${html5as:path_pid})

Add the new section to the list of parts to be processed in instance_html5as.cfg.in

[buildout]
parts =
    ...
    logrotate-entry-nginx
    ...

Refer How To Move to md5sum automatic update to update md5sum:

$ cd ~/srv/project/slapos/software/html5as-base
$ ../../update-hash