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Increase default file handle limits for virtlogd

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The initial assumption was ~2 files per guest, but some common setups
like Openstack drive up to 4 files per guest.

E.g. on Arm where the following XML leads to 4 file handles:
    <serial type='file'>
      <source path='/var/lib/nova/instances/7c0dcd78-.../console.log'/>
      <target port='0'/>
      <alias name='serial0'/>
    </serial>
    <console type='file'>
      <source path='/var/lib/nova/instances/7c0dcd78-.../console.log'/>
      <target type='serial' port='0'/>
      <alias name='serial0'/>
    </console>

With that in mind and the target to support 4k guests by default we
should raise the limit to 16k.

Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
This commit is contained in:
Christian Ehrhardt
2017-10-26 12:29:28 +02:00
committed by Michal Privoznik
parent 32c29f10db
commit d744476475
1 changed files with 4 additions and 2 deletions
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src/logging/virtlogd.service.in
+4 -2
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@@ -15,9 +15,11 @@ ExecReload=/bin/kill -USR1 $MAINPID
OOMScoreAdjust=-900
# Need to have at least one file open per guest (eg QEMU
# stdio log), but might be more (eg serial console logs)
# A common case is OpenStack which often has up to 4 file
# handles per guest.
# libvirtd.service written to expect 4096 guests, so if we
# guess at 2 log files per guest here (stdio + 1 serial):
LimitNOFILE=8192
# guess at 4 files per guest here that is 16k:
LimitNOFILE=16384
[Install]
Also=virtlogd.socket