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Re: oVirt on a Single Server
by Staniforth, Paul 22 Jan '20

22 Jan '20

Hello Matt, probably the easiest setup to test/evaluate oVirt it to use ORB https://www.ovirt.org/documentation/ovirt-orb/ oVirt Orb | oVirt<https://www.ovirt.org/documentation/ovirt-orb/> oVirt is a free open-source virtualization solution for your entire enterprise www.ovirt.org From version 4.2 you can setup a single node hyper-converged install but it requires more skills and resources. https://www.ovirt.org/documentation/gluster-hyperconverged/chap-Introductio… Introduction | oVirt<https://www.ovirt.org/documentation/gluster-hyperconverged/chap-Introductio…> Chapter: Introduction. Hyperconvergence is a type of infrastructure system with a software-centric architecture that tightly integrates compute, storage, networking and virtualization resources and other technologies from scratch in a commodity hardware box supported by a single vendor[1]. www.ovirt.org You could also use nested virtualization on KVM and virt-manager, use your host to provide NFS, iscsi or gluster and then provide a nested VM for the engine and hosts. Regards, Paul S. ________________________________ From: Matt R <webmattr(a)hotmail.com> Sent: 21 January 2020 08:05 To: Tony Brian Albers <tba(a)kb.dk> Cc: users(a)ovirt.org <users(a)ovirt.org> Subject: [ovirt-users] Re: oVirt on a Single Server Caution External Mail: Do not click any links or open any attachments unless you trust the sender and know that the content is safe. That was my original configuration, but I found that it wouldn't let me add the local machine as a host, and so I thought perhaps I needed to use the self-hosted deployment methodology instead. Would a regular engine be better for my deployment type? If so, I can investigate why that isn't working, and start over. Sent from my iPad > On Jan 20, 2020, at 11:46 PM, Tony Brian Albers <tba(a)kb.dk> wrote: > >> On Tue, 2020-01-21 at 07:35 +0000, webmattr(a)hotmail.com wrote: >> Hello, >> >> I can't seem to install the self-hosted engine onto local storage. It >> gives me glustefs, iscsi, fc, and nfs as the available options. I'm >> using this in a home-lab scenario, and don't have budget/etc. for >> building out a dedicated NAS for it, or setting up multiple nodes. I >> like the look of oVirt, and wanted to try it with a couple disposable >> vm's (plex, and a docker instance I break often). My current best- >> thought for how to make it work is to setup NFS on the server, and >> then point the self-hosted engine at the (local) NFS share. Is there >> a better way to do this that I might be overlooking?* >> >> *Factoring that I don't have the funds to build out a proper storage >> environment, yet. >> >> (and if anyone asks, I did search for a solution to this, but didn't >> find anything super helpful. Mostly I found 5+ year old articles on a >> similar but different scenario). >> > > Well, if you can live with a regular engine(not self-hosted), this > works: > > https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ovirt… > > > HTH > > /tony > > > > > > > _______________________________________________ Users mailing list -- users(a)ovirt.org To unsubscribe send an email to users-leave(a)ovirt.org Privacy Statement: https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ovirt… oVirt Code of Conduct: https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ovirt… List Archives: https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.ovi… To view the terms under which this email is distributed, please go to:- http://leedsbeckett.ac.uk/disclaimer/email/

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OVA export to NFS share slow
by Jürgen Walch 22 Jan '20

22 Jan '20

Hello, we are using oVirt on a production system with a three node hyperconverged-cluster based on GlusterFS with a 10Gbit storage backbone network. Everything runs smooth except OVA exports. Each node has a NFS mount mounted on /data/ova with custom mount option "soft". The NFS server used is a plain vanilla CentOS7 host with /etc/exports containing a line /data/ova *(rw,all_squash,anonuid=36,anongid=36) When exporting VM's as OVA using the engine web gui, the export is terribly slow (~4MiB/s), it succeeds for small disks (up to 20GB), exporting larger disks fails with a timeout. The network link between oVirt-nodes and NFS server is 1Gbit. I have done a little testing and looked at the code in /usr/share/ovirt-engine/playbooks/roles/ovirt-ova-pack/files/pack_ova.py. It seems, the export is done by setting up a loop device /dev/loopX on the exporting node linked to a freshly generated sparse file /data/ova/{vmname}.tmp on the NFS share and then exporting the disk using qemu-img with target /dev/loopX. Using iotop on the node doing the export I can see write rates ranging from 2-5 Mib/s on the /dev/loopX device. When copying to the NFS share /data/ova using dd or qemu-img *directly* (that is using /data/ova/test.img instead of the loop device as target) I am getting write rates of ~100MiB/s which is the expected performance of the NFS servers underlying harddisk-system and the network connection. It seems that the loop device is the bottleneck. So far I have been playing with NFS mount options and the options passed to qemu-img in /usr/share/ovirt-engine/playbooks/roles/ovirt-ova-pack/files/pack_ova.py without any success. Any ideas or anyone with similar problems ? 😊 -- juergen walch

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possible to export a running VM to OVA?
by Jayme 21 Jan '20

21 Jan '20

I'm looking at using a script similar to https://github.com/oVirt/ovirt-engine-sdk/blob/master/sdk/examples/export_v… to export VMs as OVA for backup purposes. I tested it out and it seems that it does create a snapshot and allows me to export an OVA of a running VM. I read in guides that the VM should be shutdown before exporting to OVA but I'm not sure if that info is still relevant.

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Gluster: a lof of Number of ntries in heal pending
by Stefan Wolf 21 Jan '20

21 Jan '20

Hello to all, I ve a problem with gluster [root@kvm10 ~]# gluster volume heal data info summary Brick kvm10:/gluster_bricks/data Status: Connected Total Number of entries: 868 Number of entries in heal pending: 868 Number of entries in split-brain: 0 Number of entries possibly healing: 0 Brick kvm320.durchhalten.intern:/gluster_bricks/data Status: Connected Total Number of entries: 1 Number of entries in heal pending: 1 Number of entries in split-brain: 0 Number of entries possibly healing: 0 Brick kvm360.durchhalten.intern:/gluster_bricks/data Status: Connected Total Number of entries: 867 Number of entries in heal pending: 867 Number of entries in split-brain: 0 Number of entries possibly healing: 0 Brick kvm380.durchhalten.intern:/gluster_bricks/data Status: Connected Total Number of entries: 868 Number of entries in heal pending: 868 Number of entries in split-brain: 0 Number of entries possibly healing: 0 [root@kvm10 ~]# gluster volume heal data info split-brain Brick kvm10:/gluster_bricks/data Status: Connected Number of entries in split-brain: 0 Brick kvm320.durchhalten.intern:/gluster_bricks/data Status: Connected Number of entries in split-brain: 0 Brick kvm360.durchhalten.intern:/gluster_bricks/data Status: Connected Number of entries in split-brain: 0 Brick kvm380.durchhalten.intern:/gluster_bricks/data Status: Connected Number of entries in split-brain: 0 As I understand there is no split-brain but 868 files ar in state heal pending. I ve restarted every node. I ve also tried: [root@kvm10 ~]# gluster volume heal data full Launching heal operation to perform full self heal on volume data has been successful Use heal info commands to check status. but even after a week there is no really change ( I started with 912 Number of entries in heal pending) can somebody tell what exactly is the problem and how can I solve it. thank you very much

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Re: oVirt on a Single Server
by Tony Brian Albers 21 Jan '20

21 Jan '20

In a small environment I think the easiest way would be to use the local machine as a host and then run the engine as a vm on a laptop or an older PC. As long as you have memory enough it runs on pretty much anything. Be careful when using local storage, it's got some special requirements: https://www.ovirt.org/documentation/admin-guide/chap-Storage.html /tony On Tue, 2020-01-21 at 08:05 +0000, Matt R wrote: > That was my original configuration, but I found that it wouldn't let > me add the local machine as a host, and so I thought perhaps I needed > to use the self-hosted deployment methodology instead. > > Would a regular engine be better for my deployment type? If so, I can > investigate why that isn't working, and start over. > > Sent from my iPad > > > On Jan 20, 2020, at 11:46 PM, Tony Brian Albers <tba(a)kb.dk> wrote: > > > > > On Tue, 2020-01-21 at 07:35 +0000, webmattr(a)hotmail.com wrote: > > > Hello, > > > > > > I can't seem to install the self-hosted engine onto local > > > storage. It > > > gives me glustefs, iscsi, fc, and nfs as the available options. > > > I'm > > > using this in a home-lab scenario, and don't have budget/etc. for > > > building out a dedicated NAS for it, or setting up multiple > > > nodes. I > > > like the look of oVirt, and wanted to try it with a couple > > > disposable > > > vm's (plex, and a docker instance I break often). My current > > > best- > > > thought for how to make it work is to setup NFS on the server, > > > and > > > then point the self-hosted engine at the (local) NFS share. Is > > > there > > > a better way to do this that I might be overlooking?* > > > > > > *Factoring that I don't have the funds to build out a proper > > > storage > > > environment, yet. > > > > > > (and if anyone asks, I did search for a solution to this, but > > > didn't > > > find anything super helpful. Mostly I found 5+ year old articles > > > on a > > > similar but different scenario). > > > > > > > Well, if you can live with a regular engine(not self-hosted), this > > works: > > > > https://www.ovirt.org/documentation/install-guide/chap-Installing_oVirt.html > > > > > > HTH > > > > /tony > > > > > > > > > > > > > >

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oVirt on a Single Server
by webmattr＠hotmail.com 21 Jan '20

21 Jan '20

Hello, I can't seem to install the self-hosted engine onto local storage. It gives me glustefs, iscsi, fc, and nfs as the available options. I'm using this in a home-lab scenario, and don't have budget/etc. for building out a dedicated NAS for it, or setting up multiple nodes. I like the look of oVirt, and wanted to try it with a couple disposable vm's (plex, and a docker instance I break often). My current best-thought for how to make it work is to setup NFS on the server, and then point the self-hosted engine at the (local) NFS share. Is there a better way to do this that I might be overlooking?* *Factoring that I don't have the funds to build out a proper storage environment, yet. (and if anyone asks, I did search for a solution to this, but didn't find anything super helpful. Mostly I found 5+ year old articles on a similar but different scenario).

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VM migrations stalling over migration-only network
by Ben 21 Jan '20

21 Jan '20

Hi, I'm pretty stuck at the moment so I hope someone can help me. I have an oVirt 4.3 data center with two hosts. Recently, I attempted to segregate migration traffic from the the standard ovirtmgmt network, where the VM traffic and all other traffic resides. I set up the VLAN on my router and switch, and created LACP bonds on both hosts, tagging them with the VLAN ID. I confirmed the routes work fine, and traffic speeds are as expected. MTU is set to 9000. After configuring the migration network in the cluster and dragging and dropping it onto the bonds on each host, VMs fail to migrate. oVirt is not reporting any issues with the network interfaces or sync with the hosts. However, when I attempt to live-migrate a VM, progress gets to 1% and stalls. The transfer rate is 0Mbps, and the operation eventually fails. I have not been able to identify anything useful in the VDSM logs on the source or destination hosts, or in the engine logs. It repeats the below WARNING and INFO logs for the duration of the process, then logs the last entries when it fails. I can provide more logs if it would help. I'm not even sure where to start -- since I am a novice at networking, at best, my suspicion the entire time was that something is misconfigured in my network. However, the routes are good, speed tests are fine, and I can't find anything else wrong with the connections. It's not impacting any other traffic over the bond interfaces. Are there other requirements that must be met for VMs to migrate over a separate interface/network? 2020-01-12 03:18:28,245-0500 WARN (migmon/a24fd7e3) [virt.vm] (vmId='a24fd7e3-161c-451e-8880-b3e7e1f7d86f') Migration stalling: remaining (4191MiB) > lowmark (4191MiB). (migration:854) 2020-01-12 03:18:28,245-0500 INFO (migmon/a24fd7e3) [virt.vm] (vmId='a24fd7e3-161c-451e-8880-b3e7e1f7d86f') Migration Progress: 930.341 seconds elapsed, 1% of data processed, total data: 4192MB, processed data: 0MB, remaining data: 4191MB, transfer speed 0MBps, zero pages: 149MB, compressed: 0MB, dirty rate: 0, memory iteration: 1 (migration:881) 2020-01-12 03:18:31,386-0500 ERROR (migsrc/a24fd7e3) [virt.vm] (vmId='a24fd7e3-161c-451e-8880-b3e7e1f7d86f') operation failed: migration out job: unexpectedly failed (migration:282) 2020-01-12 03:18:32,695-0500 ERROR (migsrc/a24fd7e3) [virt.vm] (vmId='a24fd7e3-161c-451e-8880-b3e7e1f7d86f') Failed to migrate (migration:450) File "/usr/lib/python2.7/site-packages/vdsm/virt/migration.py", line 431, in _regular_run time.time(), migrationParams, machineParams File "/usr/lib/python2.7/site-packages/vdsm/virt/migration.py", line 505, in _startUnderlyingMigration File "/usr/lib/python2.7/site-packages/vdsm/virt/migration.py", line 591, in _perform_with_conv_schedule self._perform_migration(duri, muri) File "/usr/lib/python2.7/site-packages/vdsm/virt/migration.py", line 525, in _perform_migration self._migration_flags) libvirtError: operation failed: migration out job: unexpectedly failed 2020-01-12 03:18:40,880-0500 INFO (jsonrpc/6) [api.virt] FINISH getMigrationStatus return={'status': {'message': 'Done', 'code': 0}, 'migrationStats': {'status': {'message': 'Fatal error during migration', 'code': 12}, 'progress': 1L}} from=::ffff:10.0.0.20,41462, vmId=a24fd7e3-161c-451e-8880-b3e7e1f7d86f (api:54)

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Ovirt backup
by Nazan CENGİZ 20 Jan '20

20 Jan '20

Hi all, I want to back up Ovirt for free. Is there a script, project or tool that you can recommend for this? Is there a project that you can test, both backup and restore process can work properly? Best Regards, Nazan. [cid:image635035.PNG@c85af1f5.4398eec0]<http://www.havelsan.com.tr> [cid:image1b01e4.JPG@3906782d.46addbb9] Nazan CENGİZ AR-GE MÜHENDİSİ Mustafa Kemal Mahallesi 2120 Cad. No:39 06510 Çankaya Ankara TÜRKİYE [cid:imagebfc2cf.PNG@f8421962.4190403c] +90 312 219 57 87 [cid:imageedc33b.PNG@1c7f852f.478fd74c] +90 312 219 57 97 [cid:image1e4b47.JPG@66431552.499ea47a] YASAL UYARI: Bu elektronik posta işbu linki kullanarak ulaşabileceğiniz Koşul ve Şartlar dokümanına tabidir. <http://havelsan.com.tr/tr/news/e-posta-yasal-uyari> LEGAL NOTICE: This e-mail is subject to the Terms and Conditions document which can be accessed with this link. <http://havelsan.com.tr/tr/news/e-posta-yasal-uyari> [http://www.havelsan.com.tr/Library/images/mail/email.jpg] Lütfen gerekmedikçe bu sayfa ve eklerini yazdırmayınız / Please consider the environment before printing this email

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oVirt failing to make a template of Centos 7 VM using seal
by damien.altman＠gmail.com 20 Jan '20

20 Jan '20

Hi there, My oVirt engine is failing to create a template from a Centos 7 VM, the /var/log/vdsm/vdsm.log is as follows: ) 2020-01-20 19:39:07,332+1100 ERROR (virt/875f8036) [root] Job u'875f8036-e28a-4741-b3a3-046cc711d252' failed (jobs:221) Traceback (most recent call last): File "/usr/lib/python2.7/site-packages/vdsm/jobs.py", line 157, in run self._run() File "/usr/lib/python2.7/site-packages/vdsm/virt/jobs/seal.py", line 74, in _run virtsysprep.sysprep(vol_paths) File "/usr/lib/python2.7/site-packages/vdsm/virtsysprep.py", line 39, in sysprep commands.run(cmd) File "/usr/lib/python2.7/site-packages/vdsm/common/commands.py", line 110, in run raise cmdutils.Error(args, p.returncode, out, err) Error: Command ['/usr/bin/virt-sysprep', '-a', u'/rhev/data-center/mnt/xxxxx.xxxxx.net:_storage_host__storage/eb8ba7f9-27d5 -44c0-a744-9027be39a756/images/3ac44e69-ae82-4d79-8b58-0f3ef4cf60db/f4631212 -4b1e-4c65-b19b-47215e9aca55'] failed with rc=1 out='[ 0.0] Examining the guest ...\n' err="libvirt: XML-RPC error : Cannot create user runtime directory '//.cache/libvirt': Permission denied\nvirt-sysprep: error: libguestfs error: could not connect to libvirt (URI = \nqemu:///session): Cannot create user runtime directory '//.cache/libvirt': \nPermission denied [code=38 int1=13]\n\nIf reporting bugs, run virt-sysprep with debugging enabled and include the \ncomplete output:\n\n virt-sysprep -v -x [...]\n" The template saves fine if I do not have 'Seal Template' selected.

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VM Failover Scenario - automatically shutting down Test VM when failover for Prod VM is required
by Martin Decker 19 Jan '20

19 Jan '20

Hello List, I have a simple setup with 2 Compute Nodes to host 2 VMs: a PROD VM and a TEST VM. The requirement is that if the compute node with the Prod VM fails, the Prod VM should automatically migrate to the second compute node. In order to maximize performance for the Prod VM, there should be no other VMs running on the same compute node. This means that the Test VM should be stopped before the Prod VM is started on the failover compute node. I want to use 80-90% of the physical memory of the compute node for Prod VM, therefore Prod VM can not be started due to lack of memory if Test VM is not stopped up front. Can this be implemented? Best regards, Martin

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