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Re: About the vm memory limit
by Tommy Sway 04 Oct '21

04 Oct '21

transparent huge pages are not used on vm and physical host. But, can I enable hugepage memory on virtual machines but not on a physical machine? For database running on vm, and it needs to config hugepage. From: Strahil Nikolov <hunter86_bg(a)yahoo.com> Sent: Saturday, September 25, 2021 5:32 PM To: Tommy Sway <sz_cuitao(a)163.com> Subject: Re: [ovirt-users] About the vm memory limit It depends on the numa configuration of the host. If you have 256G per CPU, it's best to stay into that range. Also, consider disabling transparent huge pages on the host & VM. Since 4.4 Regular Huge Pages (do not confuse them with THP) can be used on the Hypervisors, while on 4.3 there were some issues but I can't provode any details. Best Regards, Strahil Nikolov On Fri, Sep 24, 2021 at 6:40, Tommy Sway <sz_cuitao(a)163.com <mailto:sz_cuitao@163.com> > wrote: I would like to ask if there is any limit on the memory size of virtual machines, or performance curve or something like that? As long as there is memory on the physical machine, the more virtual machines the better? In our usage scenario, there are many virtual machines with databases, and their memory varies greatly. For some virtual machines, 4G memory is enough, while for some virtual machines, 64GB memory is needed. I want to know what is the best use of memory for a virtual machine, since the virtual machine is just a QEMU emulation process on a physical machine, and I worry that it is not using as much memory as a physical machine. Understand this so that we can develop guidelines for optimal memory usage scenarios for virtual machines. Thank you! _______________________________________________ Users mailing list -- users(a)ovirt.org <mailto:users@ovirt.org> To unsubscribe send an email to users-leave(a)ovirt.org <mailto:users-leave@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/Y6XDOIMKCP4JE…

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Re: Can't join new mon - lossy channel, failing
by Konstantin Shalygin 04 Oct '21

04 Oct '21

Hi, > On 4 Oct 2021, at 16:37, Vladimir Bashkirtsev <vladimir(a)bashkirtsev.com> wrote: > > And just for clarity: you do not attempt to join mixed 32/64 bit cluster? There's a known bug in src/msg/async/frames_v2.h causing frame size mismatch on mixed clusters leading to the same error messages. All hardware is x86_64 k

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qemu-guest-agent not reporting IP address on boot?
by c.schreuders＠leedsbeckett.ac.uk 04 Oct '21

04 Oct '21

Hi folks, Kali Linux repos (based on Debian) no longer ship ovirt-guest-agent, and instead package qemu-guest-agent. However, since this upgrade VMs based on Kali no longer report their IP address to oVirt (and therefore timeout during provisioning). If I interact with the VM console, the VM does have an IP address, and the agent is running, yet oVirt reports N/A IP address. I've tried restarting the agent, but that does not help. If I load the console and use the VM it seems to increase the chances the IP address will eventually makes it's way to oVirt, although I can't seem to reproduce an update, or get it to provide the IP address on boot so that provisioning works reliably. Any suggestions would be really appreciated. Thank you. Cheers, Cliffe.

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Re: Upgrading from 4.3 to 4.4.8
by Gianluca Cecchi 04 Oct '21

04 Oct '21

On Mon, Oct 4, 2021 at 12:32 AM Jason Harris <jasonmicron(a)gmail.com> wrote: > Engine is updated to the latest 4.3 release and rebooted. Still getting > this after re-enabling the 4.4 repo: > > oVirt 4.4 requires engine and hosts based on RH EL / CentOS 8, while your current env in 4.3 has them based on RH EL 7 / CentOS 7. You have to reinstall the node that you isolated with the engine. So after taing the engine at its latest 4.3.x level and rebooting the 4.3 engine OS, you have to follow the steps described in 6.5: stop the ovirt-engine service, take a backup and copy the generated file outside of the env, scratch the engine and related node and reinstall it with 4.4 ovirt node and then on the host, now in 4.4, run the command hosted-engine --deploy --restore-from-file=backup.bck and so on... Gianluca

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Re: oVirt 4.3 DWH with Grafana
by Tommy Sway 03 Oct '21

03 Oct '21

Thank you! I tried it, and I can import the json after replace the 4.4 with 4.3, but still have some errors like this: pq: column "count_threads_as_cores" does not exist Object status:400 statusText:"Bad Request" data:Object results:Object message:"pq: column "count_threads_as_cores" does not exist" message:"pq: column "count_threads_as_cores" does not exist" Many of the other reports worked fine, with only a few similar errors. Is this caused by version incompatibility? After all, 4.4 in the original document was replaced with 4.3 before the import. From: Matthew.Stier(a)fujitsu.com <Matthew.Stier(a)fujitsu.com> Sent: Wednesday, September 15, 2021 3:28 AM To: Tommy Sway <sz_cuitao(a)163.com>; 'Michal Gutowski' <michal.gutowski(a)oracle.com>; 'Vrgotic, Marko' <M.Vrgotic(a)activevideo.com> Cc: users(a)ovirt.org Subject: RE: [ovirt-users] Re: oVirt 4.3 DWH with Grafana The instructions to modify the json files are missing. (Using find and sed to change all instances of v4_4_ to v4_3_ before importing them into Grafana) This is from an Oracle Blog on the doing this with OLVM 4.3 (which is basically a repackaged oVirt 4.3) Build Grafana Dashboard for Oracle Linux Virtualization Manager 4.3 <https://blogs.oracle.com/scoter/post/build-grafana-dashboard-for-oracle-lin…> From: Tommy Sway <sz_cuitao(a)163.com <mailto:sz_cuitao@163.com> > Sent: Tuesday, September 14, 2021 3:01 AM To: 'Michal Gutowski' <michal.gutowski(a)oracle.com <mailto:michal.gutowski@oracle.com> >; 'Vrgotic, Marko' <M.Vrgotic(a)activevideo.com <mailto:M.Vrgotic@activevideo.com> > Cc: users(a)ovirt.org <mailto:users@ovirt.org> Subject: [ovirt-users] Re: oVirt 4.3 DWH with Grafana The oVirt version I'm using is 4.3, and I get an error when I import JSON. pq: relation"v4_4_latest_configuration_datacenters" does not exist. From: users-bounces(a)ovirt.org <mailto:users-bounces@ovirt.org> <users-bounces(a)ovirt.org <mailto:users-bounces@ovirt.org> > On Behalf Of Michal Gutowski Sent: Wednesday, November 25, 2020 12:26 AM To: Vrgotic, Marko <M.Vrgotic(a)activevideo.com <mailto:M.Vrgotic@activevideo.com> > Cc: users(a)ovirt.org <mailto:users@ovirt.org> Subject: [ovirt-users] Re: oVirt 4.3 DWH with Grafana Hi Marko, I've tested this myself as I like playing with various Grafana use-cases and following steps allow you to set up Grafana Monitoring for your oVirt 4.3 environment and re-use all Grafana Dashboards from latest oVirt 4.4 on a previous release. 1. Allowing Grafana to connect to oVirt DWH database (Data Warehouse) Login to the oVirt engine 4.3 and create a user "grafana" with password "grafana" that will get a read-only access to the ovirt_engine_history database and will be able to use public schema # su - postgres -c 'scl enable rh-postgresql10 bash' # psql -U postgres -c "CREATE ROLE grafana WITH LOGIN ENCRYPTED PASSWORD 'grafana';" -d ovirt_engine_history # psql -U postgres -c "GRANT CONNECT ON DATABASE ovirt_engine_history TO grafana;" # psql -U postgres -c "GRANT USAGE ON SCHEMA public TO grafana;" ovirt_engine_history Generate the rest of the permissions that will be granted to the newly created user and save them to a file: # psql -U postgres -c "SELECT 'GRANT SELECT ON ' || relname || ' TO grafana;' FROM pg_class JOIN pg_namespace ON pg_namespace.oid = pg_class.relnamespace WHERE nspname = 'public' AND relkind IN ('r', 'v');" --pset=tuples_only=on ovirt_engine_history > grant.sql Use the file you created in the previous step to grant permissions to the newly created user: # psql -U postgres -f grant.sql ovirt_engine_history Remove the file you used to grant permissions: # rm grant.sql Exit the postgres user shell by pressing Ctrl+d Add the following lines for the newly created user to /var/opt/rh/rh-postgresql10/lib/pgsql/data/pg_hba.conf preceding the line beginning local all all host ovirt_engine_history grafana 0.0.0.0/0 md5 host ovirt_engine_history grafana ::0/0 md5 Reload postgres service # systemctl reload rh-postgresql10-postgresql 2. Installing Grafana You can install Grafana directly on the oVirt Engine machine (this is how it's done in oVirt 4.4) or on a separate machine. Following steps shows how you can install Grafana on a Oracle Linux 7 server. Note: Oracle provides Grafana in the OLCNE yum repository - you only need to install the repository definition package to pickup Grafana and it's dependencies. # yum install oraclelinux-release-el7 # yum install oracle-olcne-release-el7 # yum-config-manager --enable ol7_optional_latest ol7_olcne11 # yum install grafana # systemctl enable --now grafana-server 3. Adding oVirt DWH database as Data Source in Grafana Login to Grafana (default port 3000) and navigate to Configuration -> DataSources and click on Add Data Source button. Select PostgreSQL source and use the following settings (adjust the Host IP address to match your oVirt Engine IP but do not change the Name): Name: oVirt DWH Host: your-engine-ip-address:5432 user: grafana pass: grafana SSL mode: disable 4. Importing Dashboards from oVirt 4.4 Download Grafana Dashboards from oVirt 4.4 repository: https://github.com/oVirt/ovirt-dwh/tree/master/packaging/conf/grafana-dashb… You can now import them in Grafana by navigating to Create -> Import and clicking on Upload .json file or by simply pasting JSON content. I've tested this on my OLVM/oVirt 4.3 and works perfectly well. Have fun! Michal Michał Gutowski Principal Solutions Engineer, EMEA +48 665 222 979 Oracle Open Cloud Infrastructure Software - Linux & Virtualization On 24 Nov 2020, at 11:53, Vrgotic, Marko <M.Vrgotic(a)activevideo.com <mailto:M.Vrgotic@activevideo.com> > wrote: Dear oVirt folks, Thank you all for suggestions. I will give it a go and see how far I get. ----- kind regards/met vriendelijke groeten Marko Vrgotic Sr. System Engineer @ System Administration ActiveVideo o: +31 (35) 6774131 m: +31 (65) 5734174 e: <mailto:m.vrgotic@activevideo.com> m.vrgotic(a)activevideo.com w: <https://urldefense.com/v3/__http:/www.activevideo.com__;!!GqivPVa7Brio!MNQG…> 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. From: Yedidyah Bar David <didi(a)redhat.com <mailto:didi@redhat.com> > Date: Sunday, 22 November 2020 at 08:39 To: "Vrgotic, Marko" <M.Vrgotic(a)activevideo.com <mailto:M.Vrgotic@activevideo.com> > Cc: "users(a)ovirt.org <mailto:users@ovirt.org> " <users(a)ovirt.org <mailto:users@ovirt.org> > Subject: Re: [ovirt-users] oVirt 4.3 DWH with Grafana ***CAUTION: This email originated from outside of the organization. Do not click links or open attachments unless you recognize the sender!!!*** On Fri, Nov 20, 2020 at 8:45 AM Vrgotic, Marko <M.Vrgotic(a)activevideo.com <mailto:M.Vrgotic@activevideo.com> > wrote: Dear oVirt, We are currently running oVirt 4.3 and upgrade/migration to 4.4 won’t be possible for few more months. I am looking into guidelines, how to, for setting up Grafana using DataWarehouse as data source. Did anyone already did this, and would be willing to share the steps? AFAIU this is definitely not tested/recommended/supported, but the current (4.4) dashboards use only 4.3 dwh compatibility views. So in theory, 4.4 grafana setup can work against your 4.3 engine/dwh without problems. So you can try something like: 1. Install el8 on some machine 2. Install ovirt-release (4.4!) 3. Install ovirt-engine-dwh-grafana-integration-setup. I *think*, didn't try, that it would carry with it all the dependencies it needs. 4. Run engine-setup. When prompted, only accept "Configure grafana?", and reply "No" to everything else 5. Follow the other prompts as applicable This should be enough. Not sure about the commands to add SSO on the engine machine. Perhaps better verify this first against a test engine (can be on another el7/ovirt4.3 VM with no hosts). But, repeating: this isn't recommended. Did you consider upgrading only your engine, and keep your hosts 4.3 until you can upgrade them later? Best regards, -- Didi _______________________________________________ Users mailing list -- <mailto:users@ovirt.org> users(a)ovirt.org To unsubscribe send an email to <mailto:users-leave@ovirt.org> users-leave(a)ovirt.org Privacy Statement: <https://urldefense.com/v3/__https:/www.ovirt.org/privacy-policy.html__;!!Gq…> https://urldefense.com/v3/__https://www.ovirt.org/privacy-policy.html__;!!G… oVirt Code of Conduct: <https://urldefense.com/v3/__https:/www.ovirt.org/community/about/community-…> https://urldefense.com/v3/__https://www.ovirt.org/community/about/community… List Archives: <https://urldefense.com/v3/__https:/lists.ovirt.org/archives/list/users@ovir…> https://urldefense.com/v3/__https://lists.ovirt.org/archives/list/users@ovi…

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Re: fresh hyperconverged Gluster setup failed in ovirt 4.4.8
by Woo Hsutung 02 Oct '21

02 Oct '21

Same issue happens when I deploy on single node. And I can’t find where I can edit text to replace glusterd_brick_t with system_u:object_r:glusterd_brick_t:s0 Any suggestion? Best Regards Hsutung

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Live domain migration breaks Windows (UEFI) vitrual machine
by Patrick Lomakin 02 Oct '21

02 Oct '21

Greetings! I've already mentioned the problem of live disk migration between different storage domains, but yesterday I found the same problem in a new oVirt installation. My actions after deploying oVirt are: 1) Created a storage domain (iSCSI and Gluster); 2) Created a virtual machine with Windows 10 (UEFI); 3) Placed the virtual machine on the Gluster domain; 4) Started the virtual machine and started moving the disk from the Gluster storage domain to iSCSI. The disk move process was successful and error free and the virtual machine worked. However, after a reboot, the machine no longer started. The boot goes into recovery mode. All attempts to restore the machine to work were unsuccessful. I want to note that this does not happen if the machine was turned off during the disk move. In this case, it starts up without any problems. The type of domain from or to which the disk is migrated does not important. In case of live migration the Windows (UEFI) VM crashes in any case.

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Upgrading from 4.3 to 4.4.8
by jasonmicron＠gmail.com 02 Oct '21

02 Oct '21

You guys scare me. Seriously. I'm trying to update from oVirt 4.3 to 4.4 using a self-hosted engine. All VMs on the host are migrated off, other than the hosted engine, from the first host I intend to update to EL 8.4, per the documentation. I installed the RPM from here: https://resources.ovirt.org/pub/yum-repo/ovirt-release44.rpm I'm configuring the Engine following the upgrade document located here: https://www.ovirt.org/documentation/upgrade_guide/index.html#SHE_Upgrading_… Step 6.4, after installing the oVirt 4.4 RPM on the engine: engine-upgrade-check - I get this response: [root@labmanager yum.repos.d]# engine-upgrade-check VERB: queue package ovirt-engine-setup for update VERB: Downloading: ovirt-4.3-epel/x86_64/metalink (0%) VERB: Downloading: ovirt-4.3-epel/x86_64/metalink 10 k(100%) FAIL: Cannot queue package ovirt-engine-setup: Cannot find a valid baseurl for repo: ovirt-4.4/7 OK: Performing yum transaction rollback Error: Cannot find a valid baseurl for repo: ovirt-4.4/7 Doing a 'yum update' to just validate yum is working correctly, after installing the 44 RPM, I get this: Cannot find a valid baseurl for repo: ovirt-4.4/7 Any advice? Is the repo just not valid at the moment? Did someone forget to run a 'createrepo' after updating the YUM/DNF repo?

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Reinstall without dataloss
by hans＠jiflin.nl 02 Oct '21

02 Oct '21

Hi all, I am new here, been searching the mailing list on a regular base when I encountered problems and till now I always was able to keep the system up & running. As said... till now... I have oVirt at home, and I have about 7 vm's running on it. Lately I have had some troubles with my electricity, which results in a complete power outage on a irregular base. Yesterday I had a power outage which left the system unbootable with the following errors: error: ../../grub-core/loader/i386/pc/linux.c:170:invalid magic number. error: ../../grub-core/loader/i386/pc/linux.c:1418:you need to load the kernel first. Press any key to continue Normally this can be solved following https://access.redhat.com/solutions/5829141, but his time also the files in /boot had a size of 0 bytes. So basically i did not have a working kernel on the system anymore. https://www.thegeekdiary.com/centos-rhel-7-how-to-install-kernel-from-rescu… does work for CentOS 8 also, but the ovirt 4.8 iso does not have the same directory structure. Using CentOS 8 installs a kernel, but not a bootable system. Is there a way i can start the installer in troubleshooting mode so I can reinstall just the kernel on the system?

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gluster 5834 Unsynced entries present
by Dominique D 01 Oct '21

01 Oct '21

yesterday I had a glich and my second ovnode2 server restarted here are some errors in the events : VDSM ovnode3.telecom.lan command SpmStatusVDS failed: Connection timeout for host 'ovnode3.telecom.lan', last response arrived 2455 ms ago. Host ovnode3.telecom.lan is not responding. It will stay in Connecting state for a grace period of 86 seconds and after that an attempt to fence the host will be issued. Invalid status on Data Center Default. Setting Data Center status to Non Responsive (On host ovnode3.telecom.lan, Error: Network error during communication with the Host.). Executing power management status on Host ovnode3.telecom.lan using Proxy Host ovnode1.telecom.lan and Fence Agent ipmilan:10.5.1.16. Now my 3 bricks have errors from my gluster volume [root@ovnode2 ~]# gluster volume status Status of volume: datassd Gluster process TCP Port RDMA Port Online Pid ------------------------------------------------------------------------------ Brick ovnode1s.telecom.lan:/gluster_bricks/ datassd/datassd 49152 0 Y 4027 Brick ovnode2s.telecom.lan:/gluster_bricks/ datassd/datassd 49153 0 Y 2393 Brick ovnode3s.telecom.lan:/gluster_bricks/ datassd/datassd 49152 0 Y 2347 Self-heal Daemon on localhost N/A N/A Y 2405 Self-heal Daemon on ovnode3s.telecom.lan N/A N/A Y 2366 Self-heal Daemon on 172.16.70.91 N/A N/A Y 4043 Task Status of Volume datassd ------------------------------------------------------------------------------ There are no active volume tasks gluster volume heal datassd info | grep -i "Number of entries:" | grep -v "entries: 0" Number of entries: 5759 in the webadmin all the bricks are green with comments for two : ovnode1 Up, 5834 Unsynced entries present ovnode2 Up, ovnode3 Up, 5820 Unsynced entries present I tried this without success gluster volume heal datassd Launching heal operation to perform index self heal on volume datassd has been unsuccessful: Glusterd Syncop Mgmt brick op 'Heal' failed. Please check glustershd log file for details. What are the next steps ? Thank you

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