Tuesday 1 June 2010

Simple logrotate - make your log file archieve

If you want to make your log files archieve, you can create file in /etc/logrotate.d, those files will be included in logrotate.conf
Here is the file sample:
/var/log/linuxserver/linux.log {
rotate 7
daily
compress
delaycompress
missingok
notifempty
create 660 linuxuser linuxuser }

This config file will run daily, create maximum 7 archives owned by linuxuser
and linuxuser group with 660 permissions,compress all logs and exclude only yesterdays and empty log files.
Here are some selected logrotate configuration keywords.

daily Log files are rotated every day.
weekly Log files are rotated if the current weekday is less than the weekday of the last rotation or if more than a week has passed since the last rotation. This is normally the same as rotating logs on the first day of the week, but if logrotate is not being run every night a log rotation will happen at the first valid opportunity.
monthly Log files are rotated the first time logrotate is run in a month (this is normally on the first day of the month).
notifempty Do not rotate the log if it is empty (this overrides the ifempty option).
nocompress Old versions of log files are not compressed.
delaycompress Postpone compression of the previous log file to the next rotation cycle. This only has effect when used in combination with compress. It can be used when some program cannot be told to close its logfile and thus might continue writing to the previous log file for some time.
compress Old versions of log files are compressed with gzip by default.
mail address When a log is rotated out of existence, it is mailed to address. If no mail should be generated by a particular log, the nomail directive may be used.
missingok If the log file is missing, go on to the next one without issuing an error message.

To run the logrotate manually, issue the command:
logrotate -v /etc/logrotate.conf

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