December 2020 - Users - Ovirt List Archives

Windows 7 vm lost network connection under heavy network load

by Joey Ma

Hi folks, Happy holidays. I'm having an urgent problem :smile: . I've installed oVirt 4.4.2 on CentOS 8.2 and then created several Windows 7 vms for stress testing. I found that the heavy network load would lead to the e1000 net card NOT able to receive packets, it seemed totally blocked. In the meantime, packet sending was fine. Only re-enabling the net card can restore the network. Has anyone also had this problem? Looking forward to your insights. Much appreciated. Best regards, Joey

3 years, 6 months

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Cannot upgrade cluster to v4.5 (All hosts are CentOS 8.3.2011)

by Gilboa Davara

Hello all, I'm more-or-less finished building a new ovirt over glusterfs cluster with 3 fairly beefy servers. Nodes were fully upgraded to CentOS Linux release 8.3.2011 before they joined the cluster. Looking at the cluster view in the WebUI, I get an exclamation mark with the following message: "Upgrade cluster compatibility level". When I try to upgrade the cluster, 2 of the 3 hosts go into maintenance and reboot, but once the procedure is complete, the cluster version remains the same. Looking at the host vdsm logs, I see that once the engine refreshes their capabilities, all hosts return 4.2-4.4 and not 4.5. E.g. 'supportedENGINEs': ['4.2', '4.3', '4.4'], 'clusterLevels': ['4.2', '4.3', '4.4'] I assume I should be seeing 4.5 after the upgrade, no? AmI missing something? Thanks, - Gilboa

3 years, 6 months

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Best Practice? Affinity Rules Enforcement Manager or High Availability?

by souvaliotimaria＠mail.com

Hello everyone, Not sure if I should ask this here as it seems to be a pretty obvious question but here it is. What is the best solution for making your VMs able to automatically boot up on another working host when something goes wrong (gluster problem, non responsive host etc)? Would you enable the Affinity Manager and enforce some policies or would you set the VMs you want as Highly Available? Thank you very much for your time! Best regards, Maria Souvalioti

3 years, 6 months

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Re: Breaking up a oVirt cluster on storage domain boundary.

by Strahil Nikolov

> Can I migrate storage domains, and thus all the VMs within that > storage domain? > > > > Or will I need to build new cluster, with new storage domains, and > migrate the VMs? > > Actually you can create a new cluster and ensure that the Storage domains are accessible by that new cluster. Then to migrate, you just need to power off the VM, Edit -> change cluster, network, etc and power it up. It will start on the hosts in the new cluster and then you just need to verify that the application is working properly. Best Regards, Strahil Nikolov

3 years, 6 months

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Breaking up a oVirt cluster on storage domain boundary.

by Matthew.Stier＠fujitsu.com

Is it possible to break up an oVirt cluster into multiple clusters? I have an Oracle Linux Virtualization Manager 4.3.6 cluster (think oVirt 4.3.6) that is hosting four different classes of VM's. I have acquired some additional hosts, and instead of adding them to my "default" cluster, I want to create three new clusters, and migrate each class of VM to its own cluster. Each class has its own network, and storage domains. Can I migrate storage domains, and thus all the VMs within that storage domain? Or will I need to build new cluster, with new storage domains, and migrate the VMs? Most of my VMs are built from templates. I assume that those cloned from templates will not be an issue. But some of my classes are thin provisioned, and I suspect I will have an issue with migrating those at the VM level, which is why I want to migrate them at the storage domain level.

3 years, 6 months

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Shrink iSCSI Domain

by Vinícius Ferrão

Hello, Is there any way to reduce the size of an iSCSI Storage Domain? I can’t seem to figure this myself. It’s probably unsupported, and the path would be create a new iSCSI Storage Domain with the reduced size and move the virtual disks to there and them delete the old one. But I would like to confirm if this is the only way to do this… In the past I had a requirement, so I’ve created the VM Domains with 10TB, now it’s just too much, and I need to use the space on the storage for other activities. Thanks all and happy new year.

3 years, 7 months

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ovirt 4.0 after set the host into maintenance and then "Enroll Certificates" but the install failed

by momokch＠yahoo.com.hk

hello everyone, my ovirt-engine and host certification is expired, is it any method no need to shutdown all the vm can enroll/update the certificate between engine and the host??? i am using the ovirt 4.0 i tried to set the host into maintenance and then "Enroll Certificates" from the UI but the engine also show install failed thank you

3 years, 7 months

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ovirt 4.0 after set the host into maintenance and then "Enroll Certificates" but the install failed

by momokch＠yahoo.com.hk

hello everyone, my ovirt-engine and host certification is expired, is it any method no need to shutdown all the vm can enroll/update the certificate between engine and the host??? i am using the ovirt 4.0 i tried to set the host into maintenance and then "Enroll Certificates" from the UI but the engine also show install failed thank you

3 years, 7 months

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"POSIX storage based vm live migration failed"

by Tarun Kushwaha

After upgrading cluster version to 4.5 VM live migration failed showing error due to storage I/O error and VM status is being changed running to Pause , lower cluster version same is working

3 years, 7 months

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Re: New to oVirt - HE and Metric Store Question

by Strahil Nikolov

I can't recall the exact issue that was reported in the mailing list, but I remember that the user had to power off the engine and the VMs... the Devs can clearly indicate the risks of running the HostedEngine with other VMs on the same storage domain. Based on Red Hat's RHV documentation the following warning is clearly indicating some of the reasons: Creating additional data storage domains in the same data center as the self-hosted engine storage domain is highly recommended. If you deploy the self-hosted engine in a data center with only one active data storage domain, and that storage domain is corrupted, you will not be able to add new storage domains or remove the corrupted storage domain; you will have to redeploy the self-hosted engine. Another one from Red Hat's Self-Hosted Engine Recommendations: В понеделник, 28 декември 2020 г., 19:40:15 Гринуич+2, Nur Imam Febrianto <nur_imam(a)outlook.com> написа: What kind of situation is that ? If so, how can I migrate my hosted engine into another storage domain ? Regards, Nur Imam Febrianto From: Strahil Nikolov Sent: 29 December 2020 0:31 To: oVirt Users; Nur Imam Febrianto Subject: Re: [ovirt-users] New to oVirt - HE and Metric Store Question > 1. Right now we are using one SAN with 4 LUN (each mapped into 1 >specific volume) and configure the storage domain for each LUn (1 LUN = 1 >Storage Domain). Is this configuration are good ? One more, about Hosted >Engine, when we setup the cluster, it provision one storage domain, but >the storage domain is not exlusively used by Hosted Engine, we use it too >for other VM. Are this OK or it have a side impact ? Avoid using HostedEngine's storage domain for other VMs.You might get into situation that you want to avoid. Best Regards, Strahil Nikolov

3 years, 7 months

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Users December 2020