[LINUX] When the log acquired by rsyslog is not updated after rotation with logrotate

While implementing the function to get the Samba audit log with rsyslog, the log file was not updated after logrotate and it got stuck for a moment, so I will share the solution.

problem

configuration:/etc/rsyslog.d/sample.conf

local5.* /mnt/system/logs/samba/audit.log;RSYSLOG_FileFormat

/etc/logrotate.d/sample

/mnt/system/logs/samba/audit.log {
    create 0644 syslog adm
    ifempty
    dateext
    dateformat .%Y-%m-%d
    maxsize 5G
    missingok
    compress
    monthly
    rotate 12
}

As mentioned above, when logging with rsyslog, the log file is no longer updated after logrotate is executed.

Solution

After logrotate was run, `` `systemctl restart rsyslog``` fixed it. This was solved by automating with ** postrotate ** of logrotate as follows.

/etc/logrotate.d/sample

/mnt/system/logs/samba/audit.log {
    create 0644 syslog adm
    ifempty
    dateext
    dateformat .%Y-%m-%d
    maxsize 5G
    missingok
    compress
    monthly
    rotate 12
+   postrotate
+     /bin/systemctl restart rsyslog
+   endscript
}

It's a little unique to write. Don't forget the endscript.

that's all!