udev upgrade on ovirt 3.5 /el6 causes incorrect storage ownership - cannot activate host due permission denied
5:57 a.m.
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Hi, after a last yum update, udev assigned incorrect /dev/dm-* ownership
for ovirt storage. The default storage is owned by "root.disk" instead
of "vdsm.qemu". The vdsm udev cfg file is unchanged.
Package udev.x86_64 0:147-2.73.el6 WORKS
Package udev.x86_64 0:147-2.73.el6_8.1 DOESN'T
Looks like a behavior change in udev -
https://rhn.redhat.com/errata/RHBA-2016-1659.html
This update fixes the following bug:
* Previously, the udev daemon reset permissions on a device node on both
"change" and "add" kernel sysfs events. After a "change"
event was
generated for
an underlying block device, permissions on a virtual disk of a virtual
machine
(VM) were reset. Consequently, a qemu process accessing the virtual disk
encountered a "Permission denied" error, which caused problems during live
migrations of VMs. The udev service has been patched, and it now sets
permissions on a device node only on "add" events or in cases when udev
created
a new device node. The behavior of the udev service is now similar to
Red Hat
Enterprise Linux 7. (BZ#1362038)
--
Ernest Beinrohr, AXON PRO
Ing <http://www.beinrohr.sk/ing.php>;, RHCE
<http://www.beinrohr.sk/rhce.php>;, RHCVA
<http://www.beinrohr.sk/rhce.php>;, LPIC
<http://www.beinrohr.sk/lpic.php>;, VCA <http://www.beinrohr.sk/vca.php>;,
+421-2-62410360 +421-903-482603
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<p>Hi, after a last yum update, udev assigned incorrect /dev/dm-*
ownership for ovirt storage. The default storage is owned by
"root.disk" instead of "vdsm.qemu". The vdsm udev cfg file is
unchanged.<br>
</p>
<br>
<br>
Package udev.x86_64 0:147-2.73.el6 WORKS<br>
<br>
Package udev.x86_64 0:147-2.73.el6_8.1 DOESN'T <br>
<br>
Looks like a behavior change in udev -
<a class="moz-txt-link-freetext"
href="https://rhn.redhat.com/errata/RHBA-2016-1659.html">htt...
<br>
This update fixes the following bug:<br>
<br>
* Previously, the udev daemon reset permissions on a device node on
both<br>
"change" and "add" kernel sysfs events. After a "change"
event was
generated for<br>
an underlying block device, permissions on a virtual disk of a
virtual machine<br>
(VM) were reset. Consequently, a qemu process accessing the virtual
disk<br>
encountered a "Permission denied" error, which caused problems
during live<br>
migrations of VMs. The udev service has been patched, and it now
sets<br>
permissions on a device node only on "add" events or in cases when
udev created<br>
a new device node. The behavior of the udev service is now similar
to Red Hat<br>
Enterprise Linux 7. (BZ#1362038)<br>
<br>
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monospace; font-size: 90%;">
Ernest Beinrohr, AXON PRO<br>
<a style="text-decoration: none; color: gray;"
href="http://www.beinrohr.sk/ing.php">Ing</a>, <a
style="text-decoration: none; color: gray;"
href="http://www.beinrohr.sk/rhce.php">RHCE</a>, <a
style="text-decoration: none; color: gray;"
href="http://www.beinrohr.sk/rhce.php">RHCVA</a>, <a
style="text-decoration: none; color: gray;"
href="http://www.beinrohr.sk/lpic.php">LPIC</a>, <a
style="text-decoration: none; color: gray;"
href="http://www.beinrohr.sk/vca.php">VCA</a>, <br>
+421-2-62410360 +421-903-482603
<br>
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Ernest Beinrohr