Rebooting VM with mdev device reboots VM AND the host!
by paul.chapman＠farmgroup.tv
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.
3 years, 2 months
Changing the bridge for ovirt hosted engine
by Jordan Conway
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
3 years, 2 months
oVirt Engine increase RAM and CPU
by Vrgotic, Marko
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.
-----
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Marko Vrgotic
Sr. System Engineer @ System Administration
ActiveVideo
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3 years, 2 months
VXLAN
by Daniel Menzel
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
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Geschäftsführer: Daniel Menzel, Josefin Menzel
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3 years, 2 months
Self-hosted engine storage migration
by Domenico Princi
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
3 years, 2 months
Small SAN suggestions?
by Chris Adams
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>
3 years, 2 months
Re: Small SAN suggestions?
by Chris Adams
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>
3 years, 2 months
Building new cluster today - OS recommendations
by Gervais de Montbrun
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
3 years, 2 months
Testing PXE uefi boot in oVirt
by Gianluca Cecchi
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?us...
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
3 years, 2 months
