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Breaking up a oVirt cluster on storage domain boundary.
by Matthew.Stier＠fujitsu.com 30 Dec '20

30 Dec '20

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.

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Shrink iSCSI Domain
by Vinícius Ferrão 29 Dec '20

29 Dec '20

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.

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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 29 Dec '20

29 Dec '20

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

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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 29 Dec '20

29 Dec '20

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

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"POSIX storage based vm live migration failed"
by Tarun Kushwaha 28 Dec '20

28 Dec '20

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

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Re: New to oVirt - HE and Metric Store Question
by Strahil Nikolov 28 Dec '20

28 Dec '20

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

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Cannot run yum, no internet connection on a oVirt node
by jenia.ivlev＠gmail.com 28 Dec '20

28 Dec '20

Hello. I need help setting up the networking on the "self hosted engine" VM. I can't run yum in the self-hosted engine [1], there seems not to be any internet connection. I get the error "couldn't resolve host: mirrors.fedoraproject.org. Same thing when I do cURL google.com for example. Also I can't ssh to this VM from my physical machine either. I get "connection refused". I can ping the "self-hosted engine" VM though. Here is the output of ip addr on the "self hosted engine" VM: 2. enp1s0: .... state UP link/ether 52.54.... 3. virbr0: ... state DOWN inet 192.168.122.1 Here is the ip addr output on the host machine: 3. virbr0: ... state UP inet 192.168.122.1 Can someone please help me setup networking on the "self hosted engine" VM. Thanks kindly. Happy holidays. [1] https://www.ovirt.org/documentation/installing_ovirt_as_a_self-hosted_engin…

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Re: New to oVirt - HE and Metric Store Question
by Strahil Nikolov 28 Dec '20

28 Dec '20

> 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

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Moving VMs from 4.3.9 to 4.4.4
by Diggy Mc 28 Dec '20

28 Dec '20

What is the best way to move VMs from current 4.3.9 to a new 4.4.4. environment? The current environment is running oVirt 4.3.9 (started as 4.3.7). There is a single data domain using NFS on a single NAS. The future oVirt 4.4.4 environment will also have a single data domain using NFS on the same NAS as the current environment. What is the best way to move approximately 40 VMs from current 4.3.9 to a new 4.4.4. environment? Are there any caveats or considerations I need to take into account when moving the VMs? Your help, as always, is greatly appreciated.

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New to oVirt - HE and Metric Store Question
by Nur Imam Febrianto 28 Dec '20

28 Dec '20

Hi, We’re migrating our 10 physical host with 50 small VM to oVirt from VMware and so happy with its performance. There are two question that we want to ask : 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 ? 2. We’re kind of interested using Metric Store (Need performance metric history over the time), is it possible to deploy the Metric Store using smaller resources ? Our hardware is so small, we cant afford to use that lot of resources for the Metric Store. Thanks before.

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