April 2021 - Users - oVirt List Archives

Remote VNC
by David White 17 Apr '21

17 Apr '21

I'm running into the issue described in this thread: https://lists.ovirt.org/archives/list/users@ovirt.org/message/KT3B6N3UZ3DS3… In short, I have ssh to the datacenter. I can ssh to a public IP address with the "-D 8080" option to forward local port 8080 act as a SOCKS proxy. I then edit my local computer's proxy settings and set the SOCKS host to 8080. So this is a system-wide change. I'm not setting the SOCKS proxy in the browser preferences. After I do all that, I'm able to use my browser to get to the engine web UI, and I'm able to login. However, the console for each VM isn't working. In the thread I linked to above, Alan says to do this: 2. SSH to the hypervisor tunneling a local port to that remote console port. 3. Click on the console link in the Engine and locally save the vv file.4. Edit the vv file; change host to localhost and port to whichever port you configured for the local side of the tunnel. Question: I'm confused why I need to tunnel a local port to the remote console port, if I'm already tunneling port 8080 to the host. Question: I don't have much experience with ssh port forwarding. If I already have the SOCKS proxy working, how, exactly, would I accomplish step #2? With the 8080 socks proxy working, I've now tried to run this command: ssh -L 5902:127.0.0.1:5901 username@ovirt-host-ip And in this case, I'm "assuming" that 5902 is going to listen on my local computer, and that I need to edit the vv file to connect to 127.0.0.1, port 5902. That's not working. Maybe I don't understand how SOCKS proxies work, but I was hoping / under the impression that all of my network traffic would go through the ssh tunnel on port 8080, and that vnc would work at that point. Sent with ProtonMail Secure Email.

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FreeBSD 13 and virtio
by Nur Imam Febrianto 17 Apr '21

17 Apr '21

Hi, Any body already try FBSD 13 sing q35 + virtio disk + virtio net ? I cant get it working, it should be fine in FBSD 13, lastly on FBSD 12 it was the q35 spec issue with the kernel. Lot of people now it works nicely on FBSD 13, but I cant get it working on oVirt. Thanks before. Regards, Nur Imam Febrianto

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Re: Strange Issue with imageio
by Nir Soffer 17 Apr '21

17 Apr '21

On Fri, Apr 16, 2021 at 7:22 PM Nur Imam Febrianto <nur_imam(a)outlook.com> wrote: > After upgrading to 4.4.5 from 4.4.4, I’m having a strange issue. Whenever I try to upload something (image or iso) to Storage Domain without clicking Test Connection, upload process wont start. It will shows the file area already uploaded but no upload process. When I try to open the log, seems if I don’t click test connection, it wont open any session in imageio. Upload process will going normally, if I click Test connection first and proceed to upload. Please file ovirt-engine bug, testing the connection should not be required for upload. > Any idea why this is happening ? Don’t have this issue before in 4.4.4. Rebooting the engine doesn’t help either. This is most likely a bug introduced in engine 4.4.5. Nir

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Odd question: changing network MTU
by Chris Adams 17 Apr '21

17 Apr '21

I have an oVirt 4.3 cluster, running in one location. I have to move it to another location. I've got a couple of 1G links between the sites, and that's enough bandwidth for this (at least temporarily), but... I have my iSCSI networks defined with a MTU of 9000, and it turns out the site-to-site links only allow 1500 (and these links are going away after this is done, so I don't think either carrier would be interested in changing things to support larger). Because of that, the storage won't connect up. I tried going "under the hood" and setting a firewalld rule to force the MSS to a smaller value, but that didn't seem to get it. What happens if I change the MTU of an active iSCSI network in oVirt? I could just go manually change it on each node's iSCSI interfaces, but I'm not sure if oVirt might change it back. Also, I'm not sure what would happen to open iSCSI TCP connections (would they reduce gracefully). Any other suggestions/tips/etc.? I'd like to make this as transparent as possible, so was hoping to live-migrate VMs and storage. -- Chris Adams <cma(a)cmadams.net>

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Strange Issue with imageio
by Nur Imam Febrianto 16 Apr '21

16 Apr '21

Hi, After upgrading to 4.4.5 from 4.4.4, I’m having a strange issue. Whenever I try to upload something (image or iso) to Storage Domain without clicking Test Connection, upload process wont start. It will shows the file area already uploaded but no upload process. When I try to open the log, seems if I don’t click test connection, it wont open any session in imageio. Upload process will going normally, if I click Test connection first and proceed to upload. Any idea why this is happening ? Don’t have this issue before in 4.4.4. Rebooting the engine doesn’t help either. Regards, Nur Imam Febrianto

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Re: Expand gluster volumes
by David White 16 Apr '21

16 Apr '21

Sorry, I meant to reply-all, to Strahil's most recent message. So I'm doing so now. In addition to my comments below, this StackOverflow thread summarizes what I have in mind: https://stackoverflow.com/questions/43756405/extend-glusterfs-on-top-of-lvm Sent with ProtonMail Secure Email. ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐ On Friday, April 16, 2021 5:33 AM, David White <dmwhite823(a)protonmail.com> wrote: > I don't think I would have the capability to take on the expense of adding two more servers to my environment, on top of the 4th server I already have, right now. > > I realize the following isn't recommended, but would it be possible to, instead, intentionally degrade the gluster cluster by shutting 1 of the hosts down (put it in maintenance mode), add storage, and bring it back online? > > Perhaps that would be a better approach, rather than try to shift things around with a 4th server. > > Sent with ProtonMail Secure Email. > > ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐ > On Thursday, April 15, 2021 7:36 PM, Strahil Nikolov hunter86_bg(a)yahoo.com wrote: > > > Gluster allows converting from replicted to distributed-replicated (so called expansion) of the volume. > > Of course you need to add the same amount of bricks as the replica count (which should be either 'replica 3' or 'replica 3 arbiter 1'). > > The Gluster documentation on the topic is quite extensive , but it's worth mentioning that you need to 'rebalance' your cluster after the expansion or you risk filling the old bricks - while having free space on the new bricks. > > That is expected ,as each file/dir's name is hashed and each subvolume (new vs old bricks) will have it's own range of hashes. When you expand the volume, some of the files/dirs on the old bricks have hashes that match to the new "triplet". > > Also , if you do not rebalance - that will have some performance impact as gluster will search the new bricks (for the files' whose hash matches the new subvolume) before searching the old bricks. > > P.S: I think that the Engine's web interface fully supports that operation, although I'm used to the cli. > > Best Regards, > > Strahil Nikolov > > В четвъртък, 15 април 2021 г., 20:05:50 ч. Гринуич+3, David White via Users users(a)ovirt.org написа: > > Is it possible to expand an existing gluster volume? > > I have a hyperconverged environment, and have enough space right now, but I'm going to have to significantly over-provision my environment. The vast majority of our customers are using a small fraction of the amount of space that they are technically allocated, but we still need to make that space available to them. > > As a result, I'd like to plan ahead, and go ahead and have a plan to add storage later down the road. > > I'd like to plan to shut down each server in the cluster (individually, not at once), add storage, and then bring them back online. Once all 3 are back online with the additional storage, I'd like to expand the gluster volume to use the additional space. Is that possible? How? > > Sent with ProtonMail Secure Email. > > Users mailing list -- users(a)ovirt.org > > To unsubscribe send an email to users-leave(a)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/A7C3X2PW4D42G…

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glance repo in 4.3
by Christoph Köhler 16 Apr '21

16 Apr '21

I use ovirt 4.3.10 and need to get access to a glance repo for vm images/templates. The buld-in external provider 'Public Glance repository for oVirt' (glance.ovirt.org) does not work, it seems not to be maintained. Does someone knows what to do? Greetings from Christoph

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ovirt-hosted-engine-cleanup
by Marko Vrgotic 16 Apr '21

16 Apr '21

Dear oVirt, I have three HE Hosts. Upon upgrade from 4.3.5 to 4.3.10 the Hosted Engine did not start anymore on Host2, but working just fine on Host1 and Host3. I tried to Undeploy – Deploy on Host2 but I noticed that hosted-engine.conf contains only ca path and host id. It looks like either Undeploy properly or Deploy is failing due to reason I am unable to find in the logs. When checking the hosted-engine –vm-status, even though undeployed, the output was still containing Host2 in the list. Than I cleaned metadata on the Host1 and 3 for Host2 and at that point it was forgotten. After that I tried adding the Host2 back to HE pool, first installed the Host2 with fresh OS and than added it to Hosts pool with HostedEngine DEPLOY option. Result was the same. The VDSM on the Host2 was showing ERROR: “2021-04-16 06:47:30,422+0000 ERROR (periodic/3) [root] failed to retrieve Hosted Engine HA score '[Errno 2] No such file or directory'Is the Hosted Engine setup finished? (api:196)” The broker is showing the error: “MainThread::WARNING::2021-04-16 06:47:27,514::storage_broker::97::ovirt_hosted_engine_ha.broker.storage_broker.StorageBroker::(__init__) Can't connect vdsm storage: 'metadata_image_UUID can't be 'None' Atm, I am thinking of executing the /usr/sbin/ovirt-hosted-engine-cleanup but its effect is not clear to me. Is it going to cleanup any HE deploy remains from the Host its executed on, or its going to cleanup the other two Hosts, rendering my platfrom offline? I have been reading through https://www.ovirt.org/images/Hosted-Engine-4.3-deep-dive.pdf but its effect is not clear. I would have tested it already but this issue is on our production platform, so I need some experts input before taking further action. Please advise. ----- 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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Need to change switch... ovirt kvm concerns?
by jpedrolima＠gmail.com 16 Apr '21

16 Apr '21

Hi I need to migrate the switch (equipment change and VLAN implementation) so I ask you to tell me what to do about the ovirt KVM cluster. What procedures and concerns I must have ? best regards, PL

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Moving hosted engine storage
by Chris Adams 16 Apr '21

16 Apr '21

I'm moving a 4.3 cluster to new storage, and I'm down to the hosted engine. I am reading the following: https://www.ovirt.org/documentation/migrating_from_a_standalone_manager_to_… https://www.ovirt.org/develop/developer-guide/engine/migrate-to-hosted-engi… https://lists.ovirt.org/pipermail/users/2017-January/078739.html The last mentions a couple of options added to engine-backup to filter out the old hosted engine parts, but where do I use them? It looks like they only apply during restore, but from the last time I rebuilt the engine (mvoing from CentOS 6 to CentOS 7), I thought I just provided the backup file to hosted-engine --deploy and it handled the restore. Is there a way to pass those options to hosted-engine --deploy, or should I do like the example and just deploy a brand new engine, then log in and manually apply the backup (and filter options) then? Just trying to make sure I understand current (well, current for 4.3) best practice for replacing the hosted engine's storage array (iSCSI in this case, if that matters). -- Chris Adams <cma(a)cmadams.net>

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