November 2020 - Users - oVirt List Archives

Question about OVN MTU
by Strahil Nikolov 02 Nov '20

02 Nov '20

Hello All, I would like to learn more about OVN and especially the maximum MTU that I can use in my environment. Current Setup 4.3.10 Network was created via UI -> MTU Custom -> 8976 -> Create on External Provider -> Connect to Physical Network So my physical connection is MTU 9000 and I have read that Geneve uses 24 bits (maybe that's wrong ?) , thus I have reduced the MTU to 8976. I did some testing on the VMs and ping with payload of '8914' was the maximum I could pass without fragmenting and thus the MTU on the VMs was set to 8942. Did I correctly configure the test network's MTU and am I understanding it correctly that we need extra 34 bits inside the network for encapsulation ? I have checked https://www.ovirt.org/develop/release-management/features/network/managed_m… but I don't see any refference how to calculate the max MTU. Best Regards, Strahil Nikolov

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different rendering chrome and firefox and corruptions in both
by Gianluca Cecchi 01 Nov '20

01 Nov '20

Hello, I'm using Fedora 31 with google-chrome-stable-86.0.4240.111-1.x86_64 firefox-82.0-4.fc31.x86_64 Engine was deployed from a CentOS Linux 8.2 host and then with hosted engine wizard, using the appliance rpm (Package ovirt-engine-appliance.x86_64 4.4-20200916125954.1.el8) Connecting to the same 4.4.2 engine I get: 1) different landing page graphics firefox: https://drive.google.com/file/d/142Ch7qXmmIP9sQQCS1rD75yexX64RmSu/view?usp=… chrome: https://drive.google.com/file/d/1KPvlNk65ltIBhr8GFdVm-GMtfq1Elt7J/view?usp=… 2) corruption in several editing pages in firefox, where a sort of top white part seems to compromise the lower part of the window, making impossible to complete. eg in new network I don't see the lower part related to MTU...: https://drive.google.com/file/d/18aQfDbl_9R9oQsTMwebJSiRZHETkUWIc/view?usp=… 3) in Stotrage --> volumes page if I click on a volume, firefox shows no problem, but chrome gives a gui exception: https://drive.google.com/file/d/1svzQjrGctRMQFvZEpW9zpOlUbv8XXl3Q/view?usp=… Gianluca

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Discard after Delete
by Joris DEDIEU 01 Nov '20

01 Nov '20

Hi list, I forgot to check "Discard after Delete" when creating a new volume. Is there a way (other than to empty the volume) to reclaim free blocks. In https://bugzilla.redhat.com/show_bug.cgi?id=981626 I read about blkdiscard, but as far as I understand it will erase my VMs ... Thanks for your answers Joris

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Training Video or document or training session
by info＠worldhostess.com 01 Nov '20

01 Nov '20

Can someone recommend a training video of some kind of step by step document to do the installation and administration for OVirt? Or if someone that wants to do a one on one online training? I would be super excited to do online training. I have been trying many time to install and I am sure I make some mistakes because I can't get OVirt to work properly. I have done numerous installations during the last few weeks. Yours Sincerely, Henni

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