- Users - oVirt List Archives

Re: CPU Shares
by Marcos Sungaila 03 Feb '23

03 Feb '23

Hi Nick, Setting CPU Shares only changes how the instance works. It does not affect the current workload unless the instance is under pressure. For example, if you are running an RDBMS, you may see a performance improvement when normalizing the database or generating a monthly report. Even that, the improvement may be minimum. Do not expect a sensible performance improvement for normal operation. Performance tuning is not magic. You will often perform many configurations to see a 1%, maybe 2% gain. Regards, Marcos From: Nick --- <jsmith1299(a)live.com> Sent: Wednesday, February 1, 2023 9:59 AM To: users(a)ovirt.org Subject: [External] : [ovirt-users] CPU Shares Hello, I would like some help understanding CPU shares. We have several VMs which are CPU pinned due to licensing. We would like to favor one VM since it is our application VM over the other VMs which it is pinned with. Would I set the CPU share on the one that needs to priority to high or low? In the documentation I see the following: Specify CPU Shares. Possible options are Low, Medium, High, Custom, and Disabled. Virtual machines set to High receive twice as many shares as Medium, and virtual machines set to Medium receive twice as many shares as virtual machines set to Low. Disabled instructs VDSM to use an older algorithm for determining share dispensation; usually the number of shares dispensed under these conditions is 1020. I currently have it set to high and I believe it is doing the opposite of what I want it to do as the CPU steal percentage appears to be 10-15% over the other VMs which show no CPU steal and are set to low. I'd like to confirm if I have this setup correctly or not. Thanks, Nick

1 0

Re: Self-hosted engine 4.5.0 deployment fails
by John 01 Feb '23

01 Feb '23

I would run the deploy again, wait until the engine is up and then from the server you are deploying the engine on # virsh list obtain the virtual machine number from the above command, in the example below we assume the number is 1 # virsh console 1 login as root wait for all packages to finish updating: tail -f /var/log/dnf.rpm.log then: # dnf downgrade postgresql-jdbc once that's done the deployment of the engine should get past the [ INFO ] TASK [ovirt.ovirt.engine_setup : Check if Engine health page is up] step. On 03/05/2022 17:03, Mohamed Roushdy wrote: > > Hello, > > I’m deploying on Ovirt nodes v4.5.0.1, but it fails to deploy the > self-hosted engine with the following errors in the web installer: > > [ INFO ] skipping: [localhost] > [ INFO ] TASK [ovirt.ovirt.engine_setup : Check if Engine health page > is up] > [ ERROR ] fatal: [localhost -> 192.168.222.197]: FAILED! => > {"attempts": 30, "changed": false, "connection": "close", > "content_encoding": "identity", "content_length": "86", > "content_type": "text/html; charset=UTF-8", "date": "Tue, 03 May 2022 > 15:57:20 GMT", "elapsed": 0, "msg": "Status code was 500 and not > [200]: HTTP Error 500: Internal Server Error", "redirected": false, > "server": "Apache/2.4.37 (centos) OpenSSL/1.1.1k > mod_auth_gssapi/1.6.1", "status": 500, "url": > http://localhost/ovirt-engine/services/health} > [ INFO ] TASK [ovirt.ovirt.engine_setup : Clean temporary files] > [ INFO ] changed: [localhost -> 192.168.222.197] > [ INFO ] TASK [ovirt.ovirt.hosted_engine_setup : Sync on engine machine] > [ INFO ] changed: [localhost -> 192.168.222.197] > [ INFO ] TASK [ovirt.ovirt.hosted_engine_setup : Set destination > directory path] > [ INFO ] ok: [localhost -> localhost] > [ INFO ] TASK [ovirt.ovirt.hosted_engine_setup : Create destination > directory] > [ INFO ] changed: [localhost -> localhost] > [ INFO ] TASK [ovirt.ovirt.hosted_engine_setup : include_tasks] > [ INFO ] ok: [localhost] > [ INFO ] TASK [ovirt.ovirt.hosted_engine_setup : Find the local > appliance image] > [ INFO ] ok: [localhost -> localhost] > [ INFO ] TASK [ovirt.ovirt.hosted_engine_setup : Set local_vm_disk_path] > [ INFO ] ok: [localhost -> localhost] > [ INFO ] TASK [ovirt.ovirt.hosted_engine_setup : Give the vm time to > flush dirty buffers] > [ INFO ] ok: [localhost -> localhost] > [ INFO ] TASK [ovirt.ovirt.hosted_engine_setup : Copy engine logs] > [ INFO ] changed: [localhost] > [ INFO ] TASK [ovirt.ovirt.hosted_engine_setup : Change ownership of > copied engine logs] > [ INFO ] changed: [localhost -> localhost] > [ INFO ] TASK [ovirt.ovirt.hosted_engine_setup : Notify the user about > a failure] > [ ERROR ] fatal: [localhost]: FAILED! => {"changed": false, "msg": > "There was a failure deploying the engine on the local engine VM. The > system may not be provisioned according to the playbook results: > please check the logs for the issue, fix accordingly or re-deploy from > scratch.\n"} > > Any idea if this is a bug or something? I tried to deploy for eight > times with different configuration > > Thank y9ou, > > > _______________________________________________ > Users mailing list --users(a)ovirt.org > To unsubscribe send an email tousers-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/XL3Q…

2 1

CPU Shares
by Nick --- 01 Feb '23

01 Feb '23

Hello, I would like some help understanding CPU shares. We have several VMs which are CPU pinned due to licensing. We would like to favor one VM since it is our application VM over the other VMs which it is pinned with. Would I set the CPU share on the one that needs to priority to high or low? In the documentation I see the following: Specify CPU Shares. Possible options are Low, Medium, High, Custom, and Disabled. Virtual machines set to High receive twice as many shares as Medium, and virtual machines set to Medium receive twice as many shares as virtual machines set to Low. Disabled instructs VDSM to use an older algorithm for determining share dispensation; usually the number of shares dispensed under these conditions is 1020. I currently have it set to high and I believe it is doing the opposite of what I want it to do as the CPU steal percentage appears to be 10-15% over the other VMs which show no CPU steal and are set to low. I'd like to confirm if I have this setup correctly or not. Thanks, Nick

1 0

Cluster level upgrade (from 4.3 to 4.6) and Windows VM
by duparchy＠esrf.fr 01 Feb '23

01 Feb '23

Hi, When trying to upgrade the Cluster level to 4.6, a popup panel says "Due to the emulated machine change, some Windows virtual machines might lose static IP configuration" It is not clear if Windows VMs might be disconnected from the network right away when clicking OK or only when restarted... Bets regards

4 3

multiple disk snapshot_memory stay in locked state
by Nathanaël Blanchet 30 Jan '23

30 Jan '23

Hello, After many (failed) snapshot attempts, I find many disk snapshot_memory in locked state into the disks menu. unlock utility returns anything... how can I erase those disks, knowing that there is no listed snapshot for this vm

1 1

I need the deploy script to wait for fixing network configuration manually in oVirt 4.3.10
by lars.stolpe＠bvg.de 30 Jan '23

30 Jan '23

Hi, i'm planing to upgrade our production environment from oVirt 4.3 to 4.4. So i do need a fresh oVirt 4.3 installation to test the procedure before doing it in production. The command line deploy script can't handle network interfaces correctly. If i use either a single NIC oder a bond (active/passive) i get the error message "The selected network interface is not valid". If i predefine the management bridge to a running state, the deploy process goes on, but fails to activate the added host and removes the already running engine vm. The deploy process fails to synchronize the existing working network configuration with the engine configuration. I can already log in to the engine GUI and see, that the bridge "ovirtmgmt" needs to be assigned to the bonding IF, but i'm not fast enough to do so, because the deployment process ist already shutting down and erasing the vm. I do see the following ways to succeed: 1. make the depoyment process accept the given interfaces (maybe ignore errors) 2. make the deploy process wait for me to take necessary actions before checking the engine Do anyone know, how to achieve this? All i need is a running engine on hosted_storage... any other issues i can fix later. Another idea is to use one of the destined hosts as a bare metal engine, add hosts, backup the engine and use that backup for a hosted engine restore deploy, since the deploy script asks to wait after local vm is ready, but only if i do a recovery deploy. Any suggestions?

3 3

How to view multi ovirt-manager VM ?
by rak kim 27 Jan '23

27 Jan '23

Hello, I'm kim I have 7 ovirt-manager running on each service I want to manage 7 ovirt-manger on one platform Is there any program to view VMs at each ovirt-manager for one platform ? (like multi-cloud platform ?) I guess I just need to be able to control/view the VM.

2 2

Changing the Cluster Compatibility Version in hyperconverged environment
by lexxthefox＠gmail.com 25 Jan '23

25 Jan '23

Hi! I'm sorry if it is a noob question but it is very important for me. We are researching oVirt in our company and hope to use existing environment where there's no SAN/NAS solution. Just a bunch of servers. We were able to set up a hyperconverged installation with oVirt 4.4 a while ago and now I'm resuming research and trying to upgrade it to 4.5. I was able to upgrade HE and Hosts. What's left is to upgrade Cluster Compatibility Version from 4.5 to 4.7. I don't seem to find a way to do it as when I try to Edit cluster I get this error: "Cluster Compatibility Version". Upgrade Guide on https://www.ovirt.org/documentation/upgrade_guide/ does not have entries for hyperconverged set up. So I don't know where to look for information on this topic. Is it possible to achieve my goal at all? Can "frozen" Cluster Compatibility Version cause problems in the long run? I can rebuild the whole setup now when it is still being reviewed and planed. But if we start using it actively it won't be possible. I'm afraid that this could be a show-stopper in the long run. Thanks in advance!

3 6

New Ovirt installation on existing Ovirt
by yevhen.kyrylchenko＠gmail.com 25 Jan '23

25 Jan '23

Hi! I have a strange idea - I try to create a small Ovirt test lab on my existing Ovirt infrastructure. I have two real Ovirt hosts: host01 - 192.168.1.10/24, GW 192.168.1.1 host02 - 192.168.1.11/24, GW 192.168.1.1 I created VM on which I want to install new Ovirt instance: v_host01 - 192.168.1.100, checked Pass-Through Host CPU. During deployment hosted engine on v_host01 (lets say v_he - 192.168.1.110), Ovirt creates temporary bridge with random IP and hosted engine VM can comunicate through that bridge. After successful deployment this HE VM has assigned static IP 192.168.1.110. And now communication is possible only between v_host01 and v_he... I can't reach network from v_he further than v_host01 and can't reach v_he from hosts other than v_host01. Seems than bridge on v_host01, created during deployment doesn't want to forward traffik... Do you have any ideas what should I check? Regards!

1 0

Regenerate DWH ovirt_engine_history
by Diego Ercolani 24 Jan '23

24 Jan '23

Hello to all and happy new year. My question is "simple". I need to "reset" the ovirt_engine_history database. I tried to use: engine-setup --reconfigure-optional-components after removing: - ovirt_engine_history - set to "False" OVESETUP_DWH_CORE/enable=bool:True OVESETUP_GRAFANA_CORE/enable=bool:True in /etc/ovirt-engine-setup.conf.d/20-setup-ovirt-post.conf (obviously all in "Global Maintenance") currently I have a system where I have an initialized ovirt_engine_history but no engine is writing in it. I tried to follow (in some manner): https://www.ovirt.org/documentation/data_warehouse_guide/ In the ovirt engine's log there is no exception... so I cannot address the issue. I need help to reinitialize the db... I don't need the history.. only from now on. Thank you for your help but no one is

2 11