Hi Thanks for the response. Seems that they got paused, all came right after the NFS server came backup. Regards Nardus On Wed, 11 Mar 2020 at 11:34, Strahil Nikolov <hunter86_bg@yahoo.com> wrote:

On March 11, 2020 9:45:30 AM GMT+02:00, Nardus Geldenhuys < nardusg@gmail.com> wrote:

...

Hi Ovirt Mailing-list

Hope you are well. We had an outage over several ovirt clusters. It looks like we had the same ISO NFS domain shared to all off them, many of the VM's had a CD attached to it. The NFS server went down for an hour, all hell broke lose when the NFS server went down. Some of the ovirt nodes became "red/unresponssive" on the ovirt dashboard. We learned now to spilt the NFS server for ISO's and/or remove the ISO's when done.

Has anyone seen similar issues with an NFS ISO Domain? Is there special options we need to pass to the mount to get around this? Can we put the ISO's somewhere else?

Regards

Nardus

Hi Nardus,

The iso domain is deprecated, but there are some issues when uploading ISOs to block-based data domains.Using ISOs uploaded to gluster-based data domain is working pretty fine (I'm using it in my LAB), but you need to properly test prior implementing on Prod.

As far as I know, oVirt is making I/O checks frequently , so even the hard mount option won't help.

Is your NFS clusterized ? If not ,you may consider clusterizing it.

Actually, did your VMs got paused or completely crashed ?

Best Regards, Strahil Nikolov

I have notice in testing that if the ISO domain goes down, it does affect the vm's. The same server also has the sdm export domain on it, which I think houses most of the hard disks. Once the host came back up, everything resumed normal operations. Eric Evans Digital Data Services LLC. 304.660.9080 -----Original Message----- From: Strahil Nikolov <hunter86_bg@yahoo.com> Sent: Wednesday, March 11, 2020 5:35 AM To: users@ovirt.org; Nardus Geldenhuys <nardusg@gmail.com> Subject: [ovirt-users] Re: NFS ISO Domain - Outage ? On March 11, 2020 9:45:30 AM GMT+02:00, Nardus Geldenhuys <nardusg@gmail.com> wrote:

Hi Ovirt Mailing-list

Hope you are well. We had an outage over several ovirt clusters. It looks like we had the same ISO NFS domain shared to all off them, many of the VM's had a CD attached to it. The NFS server went down for an hour, all hell broke lose when the NFS server went down. Some of the ovirt nodes became "red/unresponssive" on the ovirt dashboard. We learned now to spilt the NFS server for ISO's and/or remove the ISO's when done.

Has anyone seen similar issues with an NFS ISO Domain? Is there special options we need to pass to the mount to get around this? Can we put the ISO's somewhere else?

Regards

Nardus

Hi Nardus, The iso domain is deprecated, but there are some issues when uploading ISOs to block-based data domains.Using ISOs uploaded to gluster-based data domain is working pretty fine (I'm using it in my LAB), but you need to properly test prior implementing on Prod. As far as I know, oVirt is making I/O checks frequently , so even the hard mount option won't help. Is your NFS clusterized ? If not ,you may consider clusterizing it. Actually, did your VMs got paused or completely crashed ? Best Regards, Strahil Nikolov _______________________________________________ Users mailing list -- users@ovirt.org To unsubscribe send an email to users-leave@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/KJKLYNE3R3HMLT...