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