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Rebooting VM with mdev device reboots VM AND the host!
by paul.chapman＠farmgroup.tv 21 Feb '21

21 Feb '21

Hi I'm a new to Ovirt so please forgive any gaping hole in my knowledge. I have a self hosted engine set up with two hosts. Centos 8.3, Ovirt 4.4, (cluster set to 4.5 because it told me to). I have Nvidia Tesla T4 cards in both hosts with Nvidia driver 450.102. I have Win10 VMs on one host and the HE on another. The problem I have is that when you reboot the Win10 VM it also reboots the host it's sat on. I have 'intel_iommu=on' in my grub file and both hosts pass virt-host-validate. This set up was working fine on Centos 7 with Ovirt 4.3 so I'm at a bit of a loss to know what's going on. I'll post up the logs if anyone can let me know which ones they think would be relevant. Thanks in advance, Paul.

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hosted-engine --vm-status returns "vm not running on this host" on all hosts
by paul.chapman＠farmgroup.tv 21 Feb '21

21 Feb '21

I have tried to upgrade from 4.3 to 4.4 in a self hosted environment and I now have multiple problems. One of which is that neither of my two hosts think they are running the hosted engine. What could cause this?

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Changing the bridge for ovirt hosted engine
by Jordan Conway 21 Feb '21

21 Feb '21

Hello, I'd like to move my ovirt hosted engine deploy to a different cluster, but the problem that I'm faced with is that my hosted engine bridge runs on "ovirtmgmt" but the cluster I'd like to move it to the default vm network is "ovirtmgmt_vlan" Is there a process in which I could shutdown my hosted vm, edit it's network then bring it back up on the new cluster? I have already tried redeploying the new cluster with "deploy hosted engine" on it, but when I try to start the engine on a host in the new cluster it fails because it can't find the ovirtmgmt bridge. Thank you, Jordan Conway

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oVirt Engine increase RAM and CPU
by Vrgotic, Marko 19 Feb '21

19 Feb '21

Hi oVirt, What is the cleanest way to increase the memory and cpu for SHE engine? We have the Engine running on top of three HA hosts, so I guess the specs need to be change on all three, while engine is down. Is it done by editing the VM libvirt conf file or some other way? Where do I allocate more RAM to JAVA for oVirt? We are currently running 4.3.8 version. Kindly awaiting your reply. ----- kind regards/met vriendelijke groeten Marko Vrgotic Sr. System Engineer @ System Administration ActiveVideo o: +31 (35) 6774131 m: +31 (65) 5734174 e: m.vrgotic(a)activevideo.com<mailto:m.vrgotic@activevideo.com> w: www.activevideo.com<http://www.activevideo.com> ActiveVideo Networks BV. Mediacentrum 3745 Joop van den Endeplein 1.1217 WJ Hilversum, The Netherlands. The information contained in this message may be legally privileged and confidential. It is intended to be read only by the individual or entity to whom it is addressed or by their designee. If the reader of this message is not the intended recipient, you are on notice that any distribution of this message, in any form, is strictly prohibited. If you have received this message in error, please immediately notify the sender and/or ActiveVideo Networks, LLC by telephone at +1 408.931.9200 and delete or destroy any copy of this message.

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VXLAN
by Daniel Menzel 19 Feb '21

19 Feb '21

Hi, currently we're evaluation the usage of VXLAN in oVirt - and strangely enough we don't find anything in the manual. Has this been implemented, yet? Or are we just blind because it is hidden somewhere in the tons of features of /ovn/? Kind regards, Daniel -- Daniel Menzel Geschäftsführer Menzel IT GmbH Charlottenburger Str. 33a 13086 Berlin +49 (0) 30 / 5130 444 - 00 daniel.menzel(a)menzel-it.net https://menzel-it.net Geschäftsführer: Daniel Menzel, Josefin Menzel Unternehmenssitz: Berlin Handelsregister: Amtsgericht Charlottenburg Handelsregister-Nummer: HRB 149835 B USt-ID: DE 309 226 751

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Self-hosted engine storage migration
by Domenico Princi 18 Feb '21

18 Feb '21

Hi to all, let me explain the scenario: In developer lab, I have a ovirt 4.1 environment with a single host and a self-hosted engine. The hosted engine runs on a nfs storage type. In this environment runs twelve VMs (thirteen if we include the self-hosted engine). So, now I have the urgency to do the following activities: 1) Migrate the hosted engine storage from nfs to fc (I have now an fc storage on this host). 2) Upgrade the ovirt to 4.3 release. So, I would like to have your help to understand how to implement the above two steps in this particular case ( one host and the self-hosted engine ). Regards

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Small SAN suggestions?
by Chris Adams 18 Feb '21

18 Feb '21

I have an oVirt cluster with a significantly oversized SAN for storage (iSCSI, have 30TB storage but am only using about 2.5TB). I'm looking for a more appropriately-sized setup. Any suggestions? This is currently a Dell EqualLogic array - it doesn't look like they really even have a smallish VM-storage (at least that isn't VMware) product these days. Looking at our stats, we're doing more write than read ops (outside of when backups run), typically under 150 write ops per second. I'm not looking at replacing servers right now, so not looking at hyperconverged. Just interested in what hardware people are using these days for a setup this size. Thanks. -- Chris Adams <cma(a)cmadams.net>

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Re: Small SAN suggestions?
by Chris Adams 18 Feb '21

18 Feb '21

Once upon a time, Matthew.Stier(a)fujitsu.com <Matthew.Stier(a)fujitsu.com> said: > Disks + Linux + iSCSI target (Need I say more) So I've done that before (set that up on spare hardware for a dev cluster). It works, but... not necessarily the level of reliability I'd like. I'd be back to a single point of failure for the whole cluster, which is not so good. -- Chris Adams <cma(a)cmadams.net>

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Building new cluster today - OS recommendations
by Gervais de Montbrun 16 Feb '21

16 Feb '21

Hi All, I've been testing with a single server "cluster" running oVirt w/Gluster and am about to build my in house cluster using three Dell servers. I was planing on putting CentOS 8 on these servers and building oVirt on top. With the recent changes to CentOS changing to CentOS Stream, I have concerns. I'm tempted to build my cluster with CentOS 8 (as this is what I tested on) and assume that there will be some official word from oVirt as to how to proceed come end of year. Any suggestions from folks here? Any one know if there is anything out from oVirt crew already around this? Cheers, Gervais

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Testing PXE uefi boot in oVirt
by Gianluca Cecchi 16 Feb '21

16 Feb '21

Hello, I'm testing a configuration with a CentOS 8.3 VM as a PXE server for UEFI boot. Its chipset/fw type is "I440FX Chipset with BIOS", I don't think it is important. And I have another (tobe, configured in hw as rhel 8.0) CentOS 8 VM configured now as "Q35 Chipset with UEFI" as a client. I already removed filters from vnics of both It seems that the client successfully downloads the BOOTX64.EFI but then fails fetching the netboot image with the message: Fetching Netboot Image Unable to fetch TFTP image: TFTP Error under tftp root dir I created grub.cfg this way set timeout=60 menuentry 'CentOS 8.3' { linuxefi images/c83/vmlinuz ip=dhcp inst.repo=http://172.20.0.1/c83/ initrdefi images/c83/initrd.img } and also a link to it with the mac address of the client in the form grub.cfg-00:1a:4a:19:01:54 -> grub.cfg documentation for uefi pxe server config is not quite clear on where to put it and naming Any good docs? Also the latest rh el 8.3 advanced installation guide is not so clear... See here for a screenshot: https://drive.google.com/file/d/1YJwgmg-0vTcXYWHbgCf81m8SLsN7Rwjf/view?usp=… For instance, is it expected that I can test this functionality at all using oVirt VMs? So the UEFI implementation for PXE boot? At the moment I'm using virtio as the vnic type for both the server and the client. Do I have to change them to something different (eg e1000)? Thanks in advance for any input. Gianluca

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