October 2019 - Users - Ovirt List Archives

by Strahil

Can you check your hosts and especially their networks. If any network is not OK (out of sync), you can fix it from the UI. Best Regards, Strahil NikolovOn Oct 4, 2019 23:47, Alex Irmel Oviedo Solis <alexove(a)alexove.me> wrote: > > Hello, I'm trying to run a vm with two ethernet interfaces, one of them attached to ovirmnt and the other attached to a logical network named internal_servers and got this error: > > "VM is down with error. Exit message: can not get MTU interface in 'br-int': No such device2 > > Then I created the bridge manually but I get the following error: > > "VM is down with error. Exit message: Hook Error: ('',)." > > Please help me. > > Best Regards >

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[ANN] oVirt Engine 4.3.6 async update is now available

by Sandro Bonazzola

The oVirt Team has just released a new version of ovirt-engine package that fixes a few high severity bugs: - [BZ 1755869 <https://bugzilla.redhat.com/1755869>] ovirt-engine throws an exception when trying to access VMs which have snapshots from unsupported compatibility levels - [BZ 1757782 <https://bugzilla.redhat.com/1757782>] Deleting a Single snapshot disk live merge 'REDUCE_IMAGE' step fails with NPE and snapshot disk remains in illegal state - [BZ 1758052 <https://bugzilla.redhat.com/1758052>] Create VM rollback fails with NPE leaving VM locked - Exception in invoking callback of command AddVmFromTemplate- Exception: javax.ejb.EJBTransactionRolledbackException We recommend to update ovirt-engine in order to avoid these issues. Thanks, -- Sandro Bonazzola MANAGER, SOFTWARE ENGINEERING, EMEA R&D RHV Red Hat EMEA <https://www.redhat.com/> sbonazzo(a)redhat.com <https://www.redhat.com/>*Red Hat respects your work life balance. Therefore there is no need to answer this email out of your office hours.*

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Cannot start a VM after making it headless

by Thorsten Glaser

Hi everyone, I’ve installed a Windows Server 2016 VM, enabled RDP in it, and now want to make it headless. Upon starting I get a failure; the detail message is: VM 〈name〉 is down with error. Exit message: Nicht unterstützte Konfiguration: graphics device is needed for attribute value 'display=on' in <hostdev>. “Nicht unterstützte Konfiguration” means “unsupported configuration”. Software Version:4.3.5.5-1.el7 This works on another cluster which runs: 4.1.7.6-1.el7.centos Thanks in advance, //mirabilos -- tarent solutions GmbH Rochusstraße 2-4, D-53123 Bonn • http://www.tarent.de/ Tel: +49 228 54881-393 • Fax: +49 228 54881-235 HRB 5168 (AG Bonn) • USt-ID (VAT): DE122264941 Geschäftsführer: Dr. Stefan Barth, Kai Ebenrett, Boris Esser, Alexander Steeg

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Thin pool best proctices

by jeremy_tourville＠hotmail.com

After a week of downtime from a thin pool that had 100% full metadata I decided to rebuild my single node. My post was formerly titled: Ovirt 4.2.7 won't start and drops to emergency console. I have backups of nearly all my VMs and I am working on importing them. I went from version 4.2.7.1 to 4.3.6. I am comfortable with LVM but I am new to administering thin pool LVM. I am asking myself what can I do to avoid this headache in the future? What practical steps should I take? -Regular backups -Monitoring -Proper configuration It's the last one that is the most difficult for me. You don't know what you don't know.... Can anyone share tips and advice? I learned that /etc/LVM has backups. It should be part of the backup strategy. I now know that thin pools have a special metadata volume that should be monitored for disk space. At the time I built the system I used the gedploy gluster config file. I had assumed the values in there were "safe". As I found out the hard way, reality proved otherwise. I was reading elsewhere about allowing the thin volume to grow 20% as needed but no real mention of how to do that or a good example. As I understand it, the config to make that happen exists in lvm.conf. Is that right? Have there been any changes in Ansible GlusterFS setup since 4.2.7 to choose different "safe" values with newer versions? I hope my comments won't be taken as critical by any Dev Team members regarding Ansible. My sole intent for this post is so I learn what to do better/right next time. I do have most of my VMs and the few I lost are not critical. It was lucky that I learned a hard lesson the easy way. Thanks for your input!

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oVirt Software after upgrade

by Rick A

I'm wondering why after upgrading our hosts, when viewing the host details, it's still showing the OS Description as 4.3.3.1. We are using the oVirt Node. Shouldn't the OS Description show the version we just upgraded to? I do the upgrade using the web UI. Thanks OS Version: RHEL - 7 - 6.1810.2.el7.centos OS Description: oVirt Node 4.3.3.1 <-------------------------------------- Kernel Version: 3.10.0 - 957.10.1.el7.x86_64 KVM Version: 2.12.0 - 18.el7_6.3.1 LIBVIRT Version: libvirt-4.5.0-10.el7_6.6 VDSM Version: vdsm-4.30.13-1.el7 SPICE Version: 0.14.0 - 6.el7_6.1 GlusterFS Version: glusterfs-5.5-1.el7 CEPH Version: librbd1-10.2.5-4.el7 Open vSwitch Version: openvswitch-2.10.1-3.el7 Kernel Features: PTI: 1, IBRS: 1, RETP: 0, SSBD: 3 VNC Encryption: Disabled

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Re: Managed Block Storage/Ceph: Experiences from Catastrophic Hardware failure

by Strahil

Hi Dan, As CEPH support is quite new, we need DEV clarification. Hi Sandro, Who can help to clarify if Ovirt supports direct RBD LUNs presented on the VMs? Are there any limitations in the current solution ? Best Regards, Strahil NikolovOn Oct 7, 2019 13:54, Dan Poltawski <dan.poltawski(a)tnp.net.uk> wrote: > > On Mon, 2019-10-07 at 01:56 +0300, Strahil Nikolov wrote: > > I'm not very sure that you are supposed to use the CEPH by giving > > each VM direct access. > > > > Have you considered using an iSCSI gateway as an entry point for your > > storage domain ? This way oVirt will have no issues dealing with the > > rbd locks. > > > > Of course, oVirt might be able to deal with RBD locks , but that can > > be confirmed/denied by the devs. > > Thanks for your response - regarding the locks point, I realised later > that this was my own incorrect permissions given to the client. The > ceph client was detecting the broken locks when mounting the rbd device > and unable to blacklist it. I addressed this by swithcign to the > permissions 'profile rbd'. > > Regarding iSCSI, we are using this for the hosted engine. However, I am > attracted to the idea of managing block devices with individual rbd > devices to facilate individual block device level snapshotting and I > assume performance will be better. > > thanks, > > Dan > > ________________________________ > > The Networking People (TNP) Limited. Registered office: Network House, Caton Rd, Lancaster, LA1 3PE. Registered in England & Wales with company number: 07667393 > > This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This message contains confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately by e-mail if you have received this e-mail by mistake and delete this e-mail from your system. If you are not the intended recipient you are notified that disclosing, copying, distributing or taking any action in reliance on the contents of this information is strictly prohibited.

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Re: VDI

by Leo David

Thank you for sharing the informations Alex, they are very helpfull. I am now able to get sound from the vms, although performance is pretty poor even with "adjust for performance" setting in Win10. Cannot even talk about youtube video playing - freezing and crackling. Could you please be so kind to share the following infos: 1. Have you upgraded the "spice-server" installed on the hosts with a newer version than 1.4.0 ? If so, could you provide me how could I get these packages ? 2. What graphic card have you used for getting better graphic performance with the vms ? Im trying to understand what "accepted" card could I use with my 1U chassis servers... 3. Is it only needed to install the card and the platform will alocate physical video memory to "desktop" vms ? ( Will the card RAM be automatically shared across the desktop tyoe vms running on top of the host ? ) 4. Is it necesarilly to activate sr-iov in the hosts bios or any other platform configurations ? I am really sorry for asking too many things, but im just trying to get these vdi vms working at least decent... Thank you so much ! Leo ---------- Forwarded message --------- From: <alex(a)triadic.us> Date: Tue, Sep 24, 2019 at 7:50 PM Subject: Re: [ovirt-users] Re: VDI To: Leo David <leoalex(a)gmail.com> Audio should just work as long as the VM is of the desktop type. On Sep 24, 2019 6:50 AM, Leo David <leoalex(a)gmail.com> wrote: Thank you Alex, When you say "gpu backed" are you referring to sr-iov to share same gpu to multiple vms ? Any thoughts regarding passing audio form the vm to the client ? Did you do any update of the spice-server on the hosts ? Thanks, Leo On Tue, Sep 24, 2019 at 12:01 PM <alex(a)triadic.us> wrote: I believe a lot of the package updates in CentOS 8 will solve some of the issues. But for now we get around them by disabling all visual effects on our VMS. If you are gpu backing the VMS with something like Nvidia grid the issues are non existent, but for non gpu backed VMS currently disabling all the effects is a must. We deploy the changes via gpo directly to the registry, so they take effect on first VM boot. On Sep 24, 2019 2:03 AM, Leo David <leoalex(a)gmail.com> wrote: Thank you Alex from my side as well, very usefull information. I am the middle of vdi implementation as well, and i'm having issues with the spice console since 4.2, and it seems that latest 4.3 is still having the problem. What am i confrunting is: - spice console is very slaggy and slow for Win10 vms ( not even talking about running videos..) - i can't find a way to get audio from the vm At the moment i am running 4.3, latest virt-viewer installed on the client, and latest qxl-dod driver installed on the vm. Any thoughts on solving video performance and audio redirection ? Thank you again, Leo On Mon, Sep 23, 2019, 22:53 Alex McWhirter <Alex(a)triadic.us> wrote: To achieve that all you need to do is create a template of the desktop base vm, make sure the vm type is set to desktop. Afterwards just create new vms from that template. As long as the VM type is set to desktop each new VM will use a qcow overlay on top of the base image. Taking this a step further you can then create VM pools from said template, allowing users to dynamically be assigned a new VM on login. Granted pools are usually stateless, so you need to have network file storage. We use pools for windows 10 VDI instances, where we use sysprep to autojoin the new pool vm to the domain where redirected folders are already setup. For VDI only use spice protocol. By default we found spice to be semi lackluster, so we do apply custom settings and we have recompiled spice on both servers and clients with h264 support. This is not 100% necessary, but makes things like youtube much more usable. We have also backported some audio patches to KVM. CentOS 8 should resolve a lot of these customizations that we've had to do. As far as updating, pretty much. We create a VM from the template, update it, then push it back as a new version of the template. The pools are set to always use the latest template version. Users have to log out, then back in to the VDI system in order to get the new image as logging out will destroy the users current instance and create a new one on log in. On 2019-09-23 15:16, Fabio Marzocca wrote: Hi Alex, thanks for answering. I am approaching and studying oVirt in order to propose the solution to a customer as a replacement for a commercial solution they have now. They only need Desktop virtualization. Sorry for the silly question, but I can't find a way to deploy a VM (template) to users as a "linked-clone", meaning that the users' image still refers to the original image but modification are written (and afterwards read) from a new location. This technique is called Copy-on-write. Can this be achieved with oVirt? Then, what is the Best Practice to update WIndows OS for the all the users? Currently they simply "check-out" the Gold Image, update it and check-in, while all users are running... Fabio On Mon, Sep 23, 2019 at 8:04 PM Alex McWhirter <Alex(a)triadic.us> wrote: yes, we do. All spice, with some customizations done at source level for spice / kvm packages. On 2019-09-23 13:44, Fabio Marzocca wrote: Is there anyone who uses oVirt as a full VDI environment? I would have a bunch of questions... _______________________________________________ Users mailing list -- users(a)ovirt.org To unsubscribe send an email to users-leave(a)ovirt.org Privacy Statement: https://www.ovirt.org/site/privacy-policy/ oVirt Code of Conduct: https://www.ovirt.org/community/about/community-guidelines/ List Archives: https://lists.ovirt.org/archives/list/users@ovirt.org/message/D44YB5VOKNB... _______________________________________________ Users mailing list -- users(a)ovirt.org To unsubscribe send an email to users-leave(a)ovirt.org Privacy Statement: https://www.ovirt.org/site/privacy-policy/ oVirt Code of Conduct: https://www.ovirt.org/community/about/community-guidelines/ List Archives: https://lists.ovirt.org/archives/list/users@ovirt.org/message/DWY46KJGSYJ... -- Best regards, Leo David -- Best regards, Leo David

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Managed Block Storage/Ceph: Experiences from Catastrophic Hardware failure

by Dan Poltawski

Yesterday we had a catastrophic hardware failure with one of our nodes using ceph and the experimental cinderlib integration. Unfortunately the ovirt cluster recover the situation well and took some manual intervention to resolve. I thought I'd share what happened and how we resolved it in case there is any best practice to share/bugs which are worth creating to help others in similar situaiton. We are early in our use of ovirt, so its quite possible we have things incorreclty configured. Our setup: We have two nodes, hosted engine on iSCSI, about 40vms all using managed block storage mounting the rbd volumes directly. I hadn't configured power management (perhaps this is the fundamental problem). Yesterday a hardware fault caused one of the nodes to crash and stay down awaiting user input in POST screens, taking 20 vms with it. The hosted engine was fortunately on the 'good' node and detected that the node had become unresponsive, but noted 'Host cannot be fenced automatically because power management for the host is disabled.'. At this point, knowing that one node was dead, I wanted to bring up the failed vms on the good node. However, the vms were appearing in an unknown state and I couldn't do any operations on them. It wasn't clear to me what the best course of action to do there would be. I am not sure if there is a way to mark the node as failed? In my urgency to try and resolve the situation I managed to get the failed node startred back up, shortly after it came up the engine detected that all the vms were down, I put the failed host into maintaince mode and tried to start the failed vms. Unfortunately the failed vms did not start up cleanly - it turned out that they still had rbd locks preventing writing from the failed node. To finally gets the vms to start I then manually went through every vm's managed block, found the id and found the lock and removed it: rbd lock list rbd/volume-{id} rbd lock remove rbd/voleume-{id} 'auto {lockid}' {lockername} Some overall thoughts I had: * I'm not sure what the best course of action is to notify the engine about a catastrophic hardware failure? If power management was configured, I suppose it would've removed the power and marked them all down? * Would ovirt have been able to deal with clearing the rbd locks, or did I miss a trick somewhere to resolve this situation with manually going through each device and clering the lock? * Might it be possible for ovirt to detect when the rbd images are locked for writing and prevent launching? regards, Dan ________________________________ The Networking People (TNP) Limited. Registered office: Network House, Caton Rd, Lancaster, LA1 3PE. Registered in England & Wales with company number: 07667393 This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This message contains confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately by e-mail if you have received this e-mail by mistake and delete this e-mail from your system. If you are not the intended recipient you are notified that disclosing, copying, distributing or taking any action in reliance on the contents of this information is strictly prohibited.

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[ANN] oVirt 4.3.6 is now generally available

by Sandro Bonazzola

The oVirt Project is pleased to announce the general availability of oVirt 4.3.6 as of September 26th, 2019. This update is the sixth in a series of stabilization updates to the 4.3 series. This release is available now on x86_64 architecture for: * Red Hat Enterprise Linux 7.7 or later (but < 8) * CentOS Linux (or similar) 7.7 or later (but < 8) This release supports Hypervisor Hosts on x86_64 and ppc64le architectures for: * Red Hat Enterprise Linux 7.7 or later (but < 8) * CentOS Linux (or similar) 7.7 or later (but < 8) * oVirt Node 4.3 (available for x86_64 only) Due to Fedora 28 being now at end of life this release is missing experimental tech preview for x86_64 and s390x architectures for Fedora 28. We are working on Fedora 29 and 30 support and we may re-introduce experimental support for Fedora in next release. See the release notes [1] for installation / upgrade instructions and a list of new features and bugs fixed. Notes: - oVirt Appliance is already available - oVirt Node is already available[2] oVirt Node and Appliance have been updated including: - oVirt 4.3.6: http://www.ovirt.org/release/4.3.6/ - Wildfly 17.0.1: https://wildfly.org/news/2019/07/07/WildFly-1701-Released/ - Latest CentOS 7.7 updates including: - Release for CentOS Linux 7 (1908) on the x86_64 Architecture <https://lists.centos.org/pipermail/centos-announce/2019-September/023405....> - CEBA-2019:2601 CentOS 7 NetworkManager BugFix Update <https://lists.centos.org/pipermail/centos-announce/2019-September/023423....> - CEBA-2019:2023 CentOS 7 efivar BugFix Update <https://lists.centos.org/pipermail/centos-announce/2019-September/023445....> - CEBA-2019:2614 CentOS 7 firewalld BugFix Update <https://lists.centos.org/pipermail/centos-announce/2019-September/023412....> - CEBA-2019:2227 CentOS 7 grubby BugFix Update <https://lists.centos.org/pipermail/centos-announce/2019-September/023441....> - CESA-2019:2258 Moderate CentOS 7 http-parser Security Update <https://lists.centos.org/pipermail/centos-announce/2019-September/023439....> - CESA-2019:2600 Important CentOS 7 kernel Security Update <https://lists.centos.org/pipermail/centos-announce/2019-September/023444....> - CEBA-2019:2599 CentOS 7 krb5 BugFix Update <https://lists.centos.org/pipermail/centos-announce/2019-September/023420....> - CEBA-2019:2358 CentOS 7 libguestfs BugFix Update <https://lists.centos.org/pipermail/centos-announce/2019-September/023421....> - CEBA-2019:2679 CentOS 7 libvirt BugFix Update <https://lists.centos.org/pipermail/centos-announce/2019-September/023422....> - CEBA-2019:2501 CentOS 7 rsyslog BugFix Update <https://lists.centos.org/pipermail/centos-announce/2019-September/023431....> - CEBA-2019:2355 CentOS 7 selinux-policy BugFix Update <https://lists.centos.org/pipermail/centos-announce/2019-September/023432....> - CEBA-2019:2612 CentOS 7 sg3_utils BugFix Update <https://lists.centos.org/pipermail/centos-announce/2019-September/023433....> - CEBA-2019:2602 CentOS 7 sos BugFix Update <https://lists.centos.org/pipermail/centos-announce/2019-September/023434....> - CEBA-2019:2564 CentOS 7 subscription-manager BugFix Update <https://lists.centos.org/pipermail/centos-announce/2019-September/023435....> - CEBA-2019:2356 CentOS 7 systemd BugFix Update <https://lists.centos.org/pipermail/centos-announce/2019-September/023436....> - CEBA-2019:2605 CentOS 7 tuned BugFix Update <https://lists.centos.org/pipermail/centos-announce/2019-September/023437....> - CEBA-2019:2871 CentOS 7 tzdata BugFix Update <https://lists.centos.org/pipermail/centos-announce/2019-September/023450....> - latest CentOS Virt and Storage SIG updates: - Ansible 2.8.5: https://github.com/ansible/ansible/blob/stable-2.8/changelogs/CHANGELOG-v... - Glusterfs 6.5: https://docs.gluster.org/en/latest/release-notes/6.5/ - QEMU KVM EV 2.12.0-33.1 : https://cbs.centos.org/koji/buildinfo?buildID=26484 Given the amount of security fixes provided by this release, upgrade is recommended as soon as practical. Additional Resources: * Read more about the oVirt 4.3.6 release highlights: http://www.ovirt.org/release/4.3.6/ * Get more oVirt Project updates on Twitter: https://twitter.com/ovirt * Check out the latest project news on the oVirt blog: http://www.ovirt.org/blog/ [1] http://www.ovirt.org/release/4.3.6/ [2] http://resources.ovirt.org/pub/ovirt-4.3/iso/ -- Sandro Bonazzola MANAGER, SOFTWARE ENGINEERING, EMEA R&D RHV Red Hat EMEA <https://www.redhat.com/> sbonazzo(a)redhat.com <https://www.redhat.com/>*Red Hat respects your work life balance. Therefore there is no need to answer this email out of your office hours. <https://mojo.redhat.com/docs/DOC-1199578>*

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Trying to add a LUN to a host and use that, instead of Gluster, as the datastore for my VM's.

by TomK

Hey All, I've added a 4TB LUN to my physical storage and now I want to use that, instead of GlusterFS as my datastore for VM's on that physical. How do I do this? I've tried a number of options, including adding LUN's but appears I can only add them to VM's directly but not use them as my datastores instead of GlusterFS. -- Thx, TK.

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