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Hi Shmuel,<br>
<br>
Thanks very much for looking into my problem! <br>
<br>
I installed 3.6 on the engine. I rebooted the engine. <br>
The 3 hosts were still running vdsm from 3.5. I checked back in the
yum log, and it was 4.16.26-0.el7.<br>
On the first host upgrade (virt1), I made a mistake. After bringing
in the 3.6 repo, I upgraded the packages with just "yum update".
However, I know that I should have put the host into maintenance
mode first. After the updates installed, I put the host into
maintenance mode, and it migrated the VMs off, during which I saw
more than one failed VM migration. <br>
I'm willing to accept the failures there because I should have put
the host into maintenance mode first. Live and learn!<br>
I had two other hosts to do this right. For virt2, and virt3, I put
the hosts into maintenance mode first. However, the same problem
occurred with failed migrations. I proceeded anyway, brought the
failed VMs back up elsewhere, applied the updates, and rebooted the
hosts.<br>
So now, 3.6 is installed on the engine and the 3 hosts, and they are
all rebooted.<br>
I tried another migration, and again, there were failures, so this
isn't specifically related to just 3.6.<br>
By the way, I'm using ovirtmgmt for migrations. virt1, virt2, and
virt3 have a dedicated 10G link via Intel X540 to a 10G switch.
engine is on that network as well, but it's a 1G link.<br>
I was able to run iperf tests between the nodes, and saw nearly 10G
speed. During the failed migrations, I also don't have any problem
with ovirtmgmt, so I don't think the network is an issue...<br>
<br>
I found this bug in bugzilla over the weekend:<br>
<br>
<a class="moz-txt-link-freetext" href="https://bugzilla.redhat.com/show_bug.cgi?id=1142776">https://bugzilla.redhat.com/show_bug.cgi?id=1142776</a><br>
<br>
I was nearly positive that this had something to do with the failed
migrations. As a final test, I decided to migrate the VMs from one
host to another, one at a time. I was nearly done migrating all the
VMs from virt3 to virt1. I had migrated 5 VMs all successfully,
one at a time, without any failures. When I migrated the 6th, boom
- it didn't migrate, and the VM was down. It was a pretty basic VM
as well, with very little traffic. <br>
<br>
I included on the bug report above an additional link with the
engine, virt1, virt2, and virt3 logs for Saturday where I was doing
this experimentation because there's a couple more failures
recorded. I'll include that link here:<br>
<br>
<a class="moz-txt-link-freetext" href="http://www.eecs.yorku.ca/~jas/ovirt-debug/11072015">http://www.eecs.yorku.ca/~jas/ovirt-debug/11072015</a><br>
<br>
The last VM that I attempted to transfer one at a time was
"webapp". It was transferred from virt3 to virt1.<br>
<br>
I'm really puzzled that more people haven't experienced this
issue. I've disabled the load balancing feature because I'm really
concerned that if it load balances my VMs, then they might not come
back up! I don't *think* this was happening when I was all purely
3.5, but I can't remember doing big migrations. I most certainly
was able to put a host into maintenance mode without having VMs go
down!<br>
<br>
In another email, Dan Kenisberg says that "It seems that 3.6's
vdsm-4.17.10.1 cannot consume a Random Number Generator device that
was created on 3.5.". Thanks also to Dan for looking into that as
well! I'm still waiting for more details though before opening
additional bug reports because this puzzles me... if this were the
case, then ALL of the VMs were created on 3.5, and ALL with random
number generator device, and all would fail migration, but they
don't. I have a feeling that there are a few issues at play here.
<br>
<br>
Jason.<br>
<br>
<div class="moz-cite-prefix">On 11/09/2015 11:13 AM, Shmuel Melamud
wrote:<br>
</div>
<blockquote
cite="mid:CAMFVLy0t-Nq6EMA_vyA5EXwTpN473aALA1XOKNOV2ctcnvCqAg@mail.gmail.com"
type="cite">
<div dir="ltr">
<div class="gmail_default"
style="font-family:monospace,monospace">Hi!<br>
<br>
</div>
<div class="gmail_default"
style="font-family:monospace,monospace">I'm trying to
reproduce your issue. Can you help me with the exact scenario?<br>
<br>
1. You had 3.5 running. What version of VDSM was on the hosts?<br>
2. You replaced the engine and restarted it. Now it is 3.6,
right?<br>
</div>
<div class="gmail_default"
style="font-family:monospace,monospace">3. You put a host into
maintenance. Failure occured when VMs were migrating from it?
Or you put the host into maintenance, replaced VDSM on it and
failure occured when VMs were migrating to it from other
hosts?</div>
<div class="gmail_default"
style="font-family:monospace,monospace"><br>
</div>
<div class="gmail_default"
style="font-family:monospace,monospace">Shmuel<br>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Fri, Nov 6, 2015 at 6:21 PM, Jason
Keltz <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:jas@cse.yorku.ca" target="_blank">jas@cse.yorku.ca</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">Hi.<br>
<br>
Last night, I upgraded my engine from 3.5 to 3.6. That
went flawlessly.<br>
Today, I'm trying to upgrade the vdsm on the hosts from
3.5 to 3.6 (along with applying other RHEL7.1 updates)
However, when I'm trying to put each host into maintenance
mode, and migrations start to occur, they all seem to FAIL
now! Even worse, when they fail, it leaves the hosts
DOWN! If there's a failure, I'd expect the host to simply
abort the migration.... Any help in debugging this would
be VERY much appreciated!<br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
2015-11-06 10:09:16,065 ERROR
[org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector]
(org.ovirt.thread.pool-8-thread-4) [] Correlation ID:
658ba478, Job ID: 524e8c44-04e0-42d3-89f9-9f4e4d397583,
Call Stack: null, Custom Event ID: -1, Message:
Migration failed (VM: eportfolio, Source: virt1).<br>
2015-11-06 10:10:17,112 ERROR
[org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector]
(org.ovirt.thread.pool-8-thread-22) [2f0dee16]
Correlation ID: 7da3ac1b, Job ID:
93c0b1f2-4c8e-48cf-9e63-c1ba91be425f, Call Stack: null,
Custom Event ID: -1, Message: Migration failed (VM:
ftp1, Source: virt1).<br>
2015-11-06 10:15:08,273 ERROR
[org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector]
(org.ovirt.thread.pool-8-thread-45) [] Correlation ID:
5394ef76, Job ID: 994065fc-a142-4821-934a-c2297d86ec12,
Call Stack: null, Custom Event ID: -1, Message:
Migration failed while Host is in 'preparing for
maintenance' state.<br>
2015-11-06 10:19:13,712 ERROR
[org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector]
(org.ovirt.thread.pool-8-thread-36) [] Correlation ID:
6e422728, Job ID: 994065fc-a142-4821-934a-c2297d86ec12,
Call Stack: null, Custom Event ID: -1, Message:
Migration failed while Host is in 'preparing for
maintenance' state.<br>
2015-11-06 10:42:37,852 ERROR
[org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector]
(org.ovirt.thread.pool-8-thread-12) [] Correlation ID:
e7f6300, Job ID: 1ea16622-0fa0-4e92-89e5-9dc235c03ef8,
Call Stack: null, Custom Event ID: -1, Message:
Migration failed (VM: ipa, Source: virt1).<br>
2015-11-06 10:43:59,732 ERROR
[org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector]
(org.ovirt.thread.pool-8-thread-40) [] Correlation ID:
39cfdf9, Job ID: 72be29bc-a02b-4a90-b5ec-8b995c2fa692,
Call Stack: null, Custom Event ID: -1, Message:
Migration failed (VM: labtesteval, Source: virt1).<br>
2015-11-06 10:52:11,893 ERROR
[org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector]
(org.ovirt.thread.pool-8-thread-23) [] Correlation ID:
5c435149, Job ID: 1dcd1e14-baa6-44bc-a853-5d33107b759c,
Call Stack: null, Custom Event ID: -1, Message:
Migration failed (VM: www-vhost, Source: virt1).<br>
</blockquote>
<br>
<br>
The complete engine log, virt1, virt2, and virt3 vdsm logs
are here:<br>
<br>
<a moz-do-not-send="true"
href="http://www.eecs.yorku.ca/%7Ejas/ovirt-debug/11062015"
rel="noreferrer" target="_blank">http://www.eecs.yorku.ca/~jas/ovirt-debug/11062015</a><br>
<br>
Jason.<br>
<br>
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target="_blank">Users@ovirt.org</a><br>
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href="http://lists.ovirt.org/mailman/listinfo/users"
rel="noreferrer" target="_blank">http://lists.ovirt.org/mailman/listinfo/users</a><br>
</blockquote>
</div>
<br>
</div>
</div>
</blockquote>
<br>
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