[Users] VSDM´s logrotate makes Hosts fill up var eventually

[Dan Kenigsberg]

On Thu, Jan 09, 2014 at 05:01:12PM +0000, Karli Sjöberg wrote:
> > >
> > > And the rotate policy says:
> > > /etc/logrotate.d/libvirtd
> > > ## beginning of configuration section by vdsm
> > > /var/log/libvirt/libvirtd.log {
> > >     rotate 100
> > >     missingok
> > >     copytruncate
> > >     size 15M
> > >     compress
> > >     compresscmd /usr/bin/xz
> > >     uncompresscmd /usr/bin/unxz
> > >     compressext .xz
> > > }
> > >
> > > Now, I just handled it by changing "100" to "1000" but I think that a
> 
> I do not understand this issue, Karli. After 100 log files have been
> created, the oldest one should have been removed and replaced by the
> newest one. logrotate is expected to be called every 15 minutes, so it
> should not have stayed above 15M for so long. Do you see any error when
> running `/usr/sbin/logrotate /etc/logrotate.d/libvirtd` as root?
> 
> What the funk, it doesn´t do anything, complains nothing like it´s done what it´s supposed to, and no errors in "/var/log/messages" either...
> 
> Oh, and here´s the output:
> # du -h /var/log/libvirtd.log
> 1.1G	/var/log/libvirtd.log
> # /usr/sbin/logrotate -d -v /etc/logrotate.d/libvirtd
> reading config file /etc/logrotate.d/libvirtd
> reading config info for /var/log/libvirt/libvirtd.log 
> compress_prog is now /usr/bin/xz
> uncompress_prog is now /usr/bin/unxz
> compress_ext is now .xz
> 
> Handling 1 logs
> 
> rotating pattern: /var/log/libvirt/libvirtd.log  15728640 bytes (1000 rotations)
> empty log files are rotated, old logs are removed
> considering log /var/log/libvirt/libvirtd.log
>   log does not need rotating
> 
> Really, are you sure about that?
> 
> /K

I really do not know what to say - it seems like an awkward logrotate
bug. Maybe if you play with arguments a bit (avoid compression? change
size?) it could be convinced to work. Otherwise it sounds like gdb
time...