[ovirt-users] Re: Random hosts disconnects

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(a)voxtelecom.co.za *A:* Rutherford Estate, 1 Scott Street, Waverley, Johannesburg www.vox.co.za [image: F] <https://www.facebook.com/voxtelecomZA> [image: T] <https://www.twitter.com/voxtelecom> [image: I] <https://www.instagram.com/voxtelecomza/> [image: L] <https://www.linkedin.com/company/voxtelecom> [image: Y] <https://www.youtube.com/user/VoxTelecom> *From:* Artur Socha <asocha(a)redhat.com&gt; *Sent:* 18 September 2020 13:27 *To:* Anton Louw <Anton.Louw(a)voxtelecom.co.za&gt; *Cc:* users(a)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(a)ovirt.org&gt; 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(a)voxtelecom.co.za *A:* Rutherford Estate, 1 Scott Street, Waverley, Johannesburg www.vox.co.za [image: F] <https://www.facebook.com/voxtelecomZA> [image: T] <https://www.twitter.com/voxtelecom> [image: I] <https://www.instagram.com/voxtelecomza/> [image: L] <https://www.linkedin.com/company/voxtelecom> [image: Y] <https://www.youtube.com/user/VoxTelecom> *From:* Anton Louw via Users <users(a)ovirt.org&gt; *Sent:* 16 September 2020 09:01 *To:* users(a)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(a)voxtelecom.co.za *A:* Rutherford Estate, 1 Scott Street, Waverley, Johannesburg www.vox.co.za [image: F] <https://www.facebook.com/voxtelecomZA> [image: T] <https://www.twitter.com/voxtelecom> [image: I] <https://www.instagram.com/voxtelecomza> [image: L] <https://www.linkedin.com/company/voxtelecom> [image: Y] <https://www.youtube.com/user/VoxTelecom> [image: #VoxBrand] <https://www.vox.co.za/fibre/fibre-to-the-home/?prod=HOME> *Disclaimer* The contents of this email are confidential to the sender and the intended recipient. Unless the contents are clearly and entirely of a personal nature, they are subject to copyright in favour of the holding company of the Vox group of companies. Any recipient who receives this email in error should immediately report the error to the sender and permanently delete this email from all storage devices. This email has been scanned for viruses and malware, and may have been automatically archived by *Mimecast Ltd*, an innovator in Software as a Service (SaaS) for business. Providing a *safer* and *more useful* place for your human generated data. Specializing in; Security, archiving and compliance. To find out more Click Here <https://www.voxtelecom.co.za/security/mimecast/?prod=Enterprise>;. _______________________________________________ Users mailing list -- users(a)ovirt.org To unsubscribe send an email to users-leave(a)ovirt.org Privacy Statement: https://www.ovirt.org/privacy-policy.html oVirt Code of Conduct: https://www.ovirt.org/community/about/community-guidelines/ List Archives: https://lists.ovirt.org/archives/list/users@ovirt.org/message/EJL246IPBGE... -- Artur Socha Senior Software Engineer, RHV Red Hat