Hi Artur,

 

Thanks for the reply. I have attached the system logs. There was a disconnect at 10:54, but no error that is different to the rest. I do see a whole lot of QEMU Guest Agent and block_io errors in the system logs. Not entirely sure what this means.

 

Checking the vdsm logs at the time or the error, the only entry is the below:

 

“2020-09-18 10:55:57,081+0000 WARN  (qgapoller/2) [virt.periodic.VmDispatcher] could not run <function <lambda> at 0x7f2170395578> on ['d3838612-70bb-4731-a0d4-8f65d31b40a6', '59a2f394-48fe-4bd9-91d6-08115f2eec0a', 'f81e3ab8-c1a9-4674-b238-7e229fd43e7c', '42189fa1-4381-02c7-d830-20eac408da2c', '423f1c57-f98e-707f-c0f9-d4958d3f0fec', '64d1eabc-20ff-4288-98ff-dcfd120fe7d2', '4218baf0-e2a1-42c7-2efd-077407f47b4d', '42184650-5a60-5403-d758-840bdbf92dd8', '492ea3fe-0a27-4dde-abf9-7d146ee1b988', '4218df00-15cd-bdf9-efd9-c5ead49fd89c', '9c373379-718b-4906-abc1-960fb1820c2d', 'b9441c7a-0bfd-4d41-a8de-ee24e4259b36', 'd810325a-1a45-4054-a870-c8c052a22354', '42189d3f-4570-45ea-6e5a-94c85a5885a1'] (periodic:289)”

 

I am stumped. Do you think it is worth a shot increasing the vdsConnectionTimeout and vdsHeartbeatInSeconds to 40 for testing purposes?

 

Thanks

 


Anton Louw
Cloud Engineer: Storage and Virtualization at Vox
T:  087 805 0000 | D: 087 805 1572
M: N/A
E: anton.louw@voxtelecom.co.za
A: Rutherford Estate, 1 Scott Street, Waverley, Johannesburg
www.vox.co.za

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From: Artur Socha <asocha@redhat.com>
Sent: 18 September 2020 13:27
To: Anton Louw <Anton.Louw@voxtelecom.co.za>
Cc: users@ovirt.org
Subject: Re: [ovirt-users] Re: Random hosts disconnects

 

Hi Anton,

I am not sure if changing this value would fix the issue. Defaults are pretty high. For example vdsHeartbeatInSeconds=30seconds, vdsTimeout=180seconds, vdsConnectionTimeout=20seconds.

 

Do you still have relevant logs from the affected hosts:

 /var/logs/vdsm/vdsm.log

 /var/logs/vdsm/supervdsm.log

Please look for any jsonrpc errors ie. write/read errors or (connection) timeouts.  Storage related warnings/errors might also be relevant.

 

Plus system logs if possible:

journalctl -f /usr/share/vdsm/vdsmd

journalctl  -f /usr/sbin/libvirtd

 

In order to get system logs from particular time period please combine it with the following example using -S  -U options:

journalctl -S "2020-01-12 07:00:00" -U "2020-01-12 07:15:00" 

I haven't a clue what to look there for besides any warnings/errors or anything else that seems .... unusual.

 

Artur

 

 

On Thu, Sep 17, 2020 at 8:09 AM Anton Louw via Users <users@ovirt.org> wrote:

 

Hi Everybody,

 

Did some digging around, and saw a few things regarding “vdsHeartbeatInSeconds”
I had a look at the properties file located at /etc/ovirt-engine/engine-config/engine-config.properties, and do not see an entry for “vdsHeartbeatInSeconds.type=Integer”. 
Seeing as these data centers are geographically split, could the “vdsHeartbeatInSeconds” potentially be the issue? Is it safe to increase this value after I add “vdsHeartbeatInSeconds.type=Integer” into my engine-config.properties file?
 
Thanks

 

 

Anton Louw

Cloud Engineer: Storage and Virtualization at Vox

T:  087 805 0000 | D: 087 805 1572
M: N/A
E: anton.louw@voxtelecom.co.za
A: Rutherford Estate, 1 Scott Street, Waverley, Johannesburg
www.vox.co.za

 

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From: Anton Louw via Users <users@ovirt.org>
Sent: 16 September 2020 09:01
To: users@ovirt.org
Subject: [ovirt-users] Random hosts disconnects

 

 

Hi All,

 

I have a strange issue in my oVirt environment. I currently have a standalone manager which is running in VMware. In my oVirt environment, I have two Data Centers. The manager is currently sitting on the same subnet as DC1. Randomly, hosts in DC2 will say “Not Responding” and then 2 seconds later, the hosts will activate again.

 

The strange thing is, when the manager was sitting on the same subnet as DC2, hosts in DC1 will randomly say “Not Responding”

 

I have tried going through the logs, but I cannot see anything out of the ordinary regarding why the hosts would drop connection. I have attached the engine.log for anybody that would like to do a spot check.

 

Thanks

 

Anton Louw

Cloud Engineer: Storage and Virtualization at Vox

T:  087 805 0000 | D: 087 805 1572
M: N/A
E: anton.louw@voxtelecom.co.za
A: Rutherford Estate, 1 Scott Street, Waverley, Johannesburg
www.vox.co.za

 

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#VoxBrand


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--

Artur Socha
Senior Software Engineer, RHV
Red Hat