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Re: [IMPORTANT] Upgrade to postgresql-jdbc-42.2.14-1 breaks oVirt Engine 4.4/4.5
by Jon Ji 18 Nov '22

18 Nov '22

i can't 'dnf downgrade postgresql-jdbc'. [error] No package postgresql-jdbc available. Error: No packages marked for downgrade. please help me jon.ji(a)vinchin.com

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multipath active-passive vs active-active
by Enrico Becchetti 17 Nov '22

17 Nov '22

Dear All, I have been using ovirt for many years. I've got six servers , two HPE MSA storage and a fiber channel network with two Brocade 8/20q. oVirt has got two domain storage, one volume for each MSA. Now I have only one MSA online. As you know multipath was configured throught vdsm. This is the output of the multipath command from one of the servers: [root@infm-vm04 etc]# multipath -ll 3600c0ff0003c465b6510f85b01000000 dm-2 HPE ,MSA 2050 SAN size=14T features='1 queue_if_no_path' hwhandler='0' wp=rw |-+- policy='service-time 0' prio=1 status=active | `- 2:0:0:0 sdc 8:32 active ready running |-+- policy='service-time 0' prio=1 status=enabled | `- 1:0:0:0 sdb 8:16 active ready running |-+- policy='service-time 0' prio=1 status=enabled | `- 2:0:1:0 sdd 8:48 active ready running `-+- policy='service-time 0' prio=1 status=enabled `- 1:0:1:0 sde 8:64 active ready running With this setup I think there is an active path and the other is in standby state. So, Id like to know if ovrt support active-active mode and how can I make this settings ? /This is the current multipath.conf// // //defaults {// // polling_interval 5// // no_path_retry 4// // user_friendly_names no// // flush_on_last_del yes// // fast_io_fail_tmo 5// // dev_loss_tmo 30// // max_fds 4096// //}// //blacklist {// // protocol "(scsi:adt|scsi:sbp)"// //}// //devices {// // device {// // all_devs yes// // no_path_retry 4// // }// //}// / Thanks a lot. Bye Enrico -- __________________________________________________________________________ Enrico Becchetti Servizio di Calcolo e Reti Istituto Nazionale di Fisica Nucleare - Sezione di Perugia Via Pascoli,c/o Dipartimento di Fisica 06123 Perugia (ITALY) Phone:+39 075 5852777 Mobile: +39 075 9696225 FAX: +39 075 5847296 Microsoft Teams:becchett@infn.it Mail: Enrico.Becchetti<at>pg.infn.it Skype:enrico_becchetti Pagina web personale:https://www.pg.infn.it/home/enrico-becchetti _________________________________________________________________________

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expired host certificate
by Diggy Mc 17 Nov '22

17 Nov '22

I'm running oVirt 4.4. The "libvirtd" service won't start and it appears to be because of an expired certificate. How do I create and install a new certificate on the host. Your help is much appreciated. -- Diggy ---

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vdsm 4.50.3.4 and qemu-kvm update problem
by Kapetanakis Giannis 16 Nov '22

16 Nov '22

It seems that vdsm 4.50.3.4-1.el8 has been pushed to centos-ovirt45 which according to https://github.com/oVirt/vdsm/blob/master/vdsm.spec.in # Zero-copy migrations, https://bugzilla.redhat.com/2089434 Requires: qemu-kvm >= 15:6.2.0-11.module+el8.6.0+16360+9e5d914e.4 This is not available in Rocky 8.6, probably not backported from Redhat 8.7? # dnf update Last metadata expiration check: 0:02:15 ago on Tue 08 Nov 2022 13:24:14 EET. Error: Problem 1: cannot install the best update candidate for package vdsm-4.50.2.2-1.el8.x86_64 - nothing provides qemu-kvm >= 15:6.2.0-11.module+el8.6.0+16360+9e5d914e.4 needed by vdsm-4.50.3.4-1.el8.x86_64 G

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Best performance for vcpu pinning
by martin.decker＠ora-solutions.net 16 Nov '22

16 Nov '22

Hello List, how can I achieve the best performance with vcpu pinning in KVM? Is it better to have 1:1 mapping between virtual and physical thread like this: <vcpupin vcpu='0' cpuset='0'/> <vcpupin vcpu='1' cpuset='1'/> <vcpupin vcpu='2' cpuset='2'/> <vcpupin vcpu='3' cpuset='3'/> <vcpupin vcpu='4' cpuset='4'/> <vcpupin vcpu='5' cpuset='5'/> <vcpupin vcpu='6' cpuset='6'/> <vcpupin vcpu='7' cpuset='7'/> Or is it better to allow each vCPU to run on any of the limited number of physical threads? e.g. <vcpupin vcpu='0' cpuset='0,1,2,3,4,5,6,7'/> <vcpupin vcpu='1' cpuset='0,1,2,3,4,5,6,7'/> <vcpupin vcpu='2' cpuset='0,1,2,3,4,5,6,7'/> <vcpupin vcpu='3' cpuset='0,1,2,3,4,5,6,7'/> <vcpupin vcpu='4' cpuset='0,1,2,3,4,5,6,7'/> <vcpupin vcpu='5' cpuset='0,1,2,3,4,5,6,7'/> <vcpupin vcpu='6' cpuset='0,1,2,3,4,5,6,7'/> <vcpupin vcpu='7' cpuset='0,1,2,3,4,5,6,7'/> The hypervisor host has 2 CPUs. Each CPU has 8 cores and each core 2 Threads. In total this are 32 threads. lscpu Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Byte Order: Little Endian CPU(s): 32 On-line CPU(s) list: 0-31 Thread(s) per core: 2 Core(s) per socket: 8 Socket(s): 2 NUMA node(s): 2 Vendor ID: GenuineIntel CPU family: 6 Model: 85 Model name: Intel(R) Xeon(R) Gold 6244 CPU @ 3.60GHz Stepping: 7 CPU MHz: 4213.731 CPU max MHz: 4400.0000 CPU min MHz: 1200.0000 BogoMIPS: 7200.00 Virtualization: VT-x L1d cache: 32K L1i cache: 32K L2 cache: 1024K L3 cache: 25344K NUMA node0 CPU(s): 0-7,16-23 NUMA node1 CPU(s): 8-15,24-31 I need to run 2 VMs on this host. One is for production and should have 24 vCPUs and the other one is for test and should have 8 vCPUs. Test VM workload should not impact Prod VM performance. Current configuration is: TEST: <vcpu placement='static' current='8'>128</vcpu> <iothreads>1</iothreads> <cputune> <vcpupin vcpu='0' cpuset='0'/> <vcpupin vcpu='1' cpuset='1'/> <vcpupin vcpu='2' cpuset='2'/> <vcpupin vcpu='3' cpuset='3'/> <vcpupin vcpu='4' cpuset='4'/> <vcpupin vcpu='5' cpuset='5'/> <vcpupin vcpu='6' cpuset='6'/> <vcpupin vcpu='7' cpuset='7'/> </cputune> <cpu mode='host-passthrough' check='none'> <topology sockets='16' cores='4' threads='2'/> <numa> <cell id='0' cpus='0-7' memory='134217728' unit='KiB'/> </numa> </cpu> PROD: <vcpu placement='static' current='24'>192</vcpu> <iothreads>1</iothreads> <cputune> <vcpupin vcpu='0' cpuset='8'/> <vcpupin vcpu='1' cpuset='9'/> <vcpupin vcpu='2' cpuset='10'/> <vcpupin vcpu='3' cpuset='11'/> <vcpupin vcpu='4' cpuset='12'/> <vcpupin vcpu='5' cpuset='13'/> <vcpupin vcpu='6' cpuset='14'/> <vcpupin vcpu='7' cpuset='15'/> <vcpupin vcpu='8' cpuset='16'/> <vcpupin vcpu='9' cpuset='17'/> <vcpupin vcpu='10' cpuset='18'/> <vcpupin vcpu='11' cpuset='19'/> <vcpupin vcpu='12' cpuset='20'/> <vcpupin vcpu='13' cpuset='21'/> <vcpupin vcpu='14' cpuset='22'/> <vcpupin vcpu='15' cpuset='23'/> <vcpupin vcpu='16' cpuset='24'/> <vcpupin vcpu='17' cpuset='25'/> <vcpupin vcpu='18' cpuset='26'/> <vcpupin vcpu='19' cpuset='27'/> <vcpupin vcpu='20' cpuset='28'/> <vcpupin vcpu='21' cpuset='29'/> <vcpupin vcpu='22' cpuset='30'/> <vcpupin vcpu='23' cpuset='31'/> </cputune> <cpu mode='host-passthrough' check='none'> <topology sockets='16' cores='6' threads='2'/> <numa> <cell id='0' cpus='0-23' memory='889192448' unit='KiB'/> </numa> </cpu> Versions are: ovirt-host-4.3.5 libvirt-5.7.0-28.el7.x86_64 Thanks in advance, Martin

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VDSM <host> command DestroyVDS failed: General Exception: ("Found not_in_hw, expected ('???',)",)
by nicolas＠devels.es 16 Nov '22

16 Nov '22

Hi, We're running oVirt version 4.4.8, vdsm version 4.40.100.2 and from a couple days ago some of our hosts are reporting the following error: VDSM <host> command DestroyVDS failed: General Exception: ("Found not_in_hw, expected ('???',)",) Seems that nothing has stopped working, but this is an error that shows up in the event list each minute (x each host) and is annoying. Not all hosts report this error, just a couple of them. As a fact, we had to downgrade the libvirt version on our hosts to version 7.6.0-6 because we found a bug that wouldn't start web VNC consoles with versions > 8.x.x. Not sure if this has something to do with it. Could someone shed some light on what's happening and how to solve it? Logs can be downloaded from: https://drive.google.com/file/d/1ltP-kqNu08TvOgthU9_XSZiVDa0nTGxO/view?usp=… Thanks. Nicolas

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ovirt 4.5.3.2 - remove snapshot and powerdown VM take the VM disk to unconsistent state
by Diego Ercolani 16 Nov '22

16 Nov '22

I think I encountered another bug in the engine: I needed to remove a snapshot, and while I was removing the snapshot guest went down. What happened is that the snapshot remove failed and left "inconsistent". I think there is some issue to address. Here are the relevant log (the engine.log (see 22/11/14 13:17:59)) and the log of node4 that was used by the engine. https://cloud.ssis.sm/index.php/s/CiEqMwwK5mGxBgg

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Is iSCSI supposed to be this slow?
by fs3000＠pm.me 15 Nov '22

15 Nov '22

Hello all. I just installed ovirt node and the hosted engine on a single host. As the setup did not offer a option for local filesystems, I used a iscsi LUN on the same host. So the engine got installed there. That LUN is a on a nvme disk, the kind that reads higher than 3GB/s. Yet, on a vm, i cannot get more than 280MB/s. That's using virtio-scsi or virtio as the interface. Using SATA gives around 350MB/s. I tested with dd, like: Bechmarking writes: dd if=/dev/zero of=/root/test bs=1M count=7000 status=progress Bechmarking reads: dd if=/root/test of=/dev/null bs=1M status=progress Also with hdparm -t /dev/sda Is ISCSI supposed to be this slow? Again, this is on the same machine.

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what happens to vms when a host shutdowns?
by Nathanaël Blanchet 15 Nov '22

15 Nov '22

Hi, We are installing UPS powerchute client on hypervisors. What is the default vms behaviour of running vms when an hypervisor is ordered to shutdown: do the vms live migrate or do they shutdown properly (even the restart on an other host because of HA) ? -- Nathanaël Blanchet Supervision réseau SIRE 227 avenue Professeur-Jean-Louis-Viala 34193 MONTPELLIER CEDEX 5 Tél. 33 (0)4 67 54 84 55 Fax 33 (0)4 67 54 84 14 blanchet(a)abes.fr

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Remote logging for httpd
by eshwayri＠gmail.com 14 Nov '22

14 Nov '22

My relatively small lab system was generating ~10GB of httpd logging on a daily basis. Even with logrotate and compression, the activity level was just ludicrous. I don't remember this from earlier versions. I don't see any obvious errors in the log that explain this over-zealous behavior. I didn't want to suppress the logs completely, and the LogLevel is already on warn. I decided in the end to remote log to my central syslog server which stores the logs on an NFS mount from a FreeNAS (ZFS with compression) NAS. The compression will keep the actual disk space down, and since I am not all that worried about losing some logs, I went with sync=off and udp on the transit. Here are the changes I made to /etc/httpd/conf.d/ssl.conf in case someone else finds them useful. 48,49c48,51 < ErrorLog logs/ssl_error_log < TransferLog logs/ssl_access_log --- > #ErrorLog logs/ssl_error_log > ErrorLog "|/usr/bin/logger -t ssl-error -p local1.warn" > #TransferLog logs/ssl_access_log > TransferLog "|/usr/bin/logger -t ssl-access -p local1.warn" 203,206c205,212 < CustomLog logs/ssl_request_log \ < "%t %h %{SSL_PROTOCOL}x %{SSL_CIPHER}x \"%r\" %b" < < CustomLog logs/ovirt-requests-log "%t %h \"Correlation-Id: %{Correlation-Id}o\" \"Duration: %Dus\" \"%r\" %b" "expr=%{QUERY_STRING} !~ /username.*password|password.*username/" --- > #CustomLog logs/ssl_request_log \ > # "%t %h %{SSL_PROTOCOL}x %{SSL_CIPHER}x \"%r\" %b" > LogFormat "%t %h %{SSL_PROTOCOL}x %{SSL_CIPHER}x \"%r\" %b" ssl-request-format > CustomLog "|/usr/bin/logger -t ssl-requests -p local1.warn" ssl-request-format > > LogFormat "%t %h \"Correlation-Id: %{Correlation-Id}o\" \"Duration: %Dus\" \"%r\" %b" ovirt-requests-format > CustomLog "|/usr/bin/logger -t ovirt-requests -p local1.warn" ovirt-requests-format "expr=%{QUERY_STRING} !~ /username.*password|password.*username/" > #CustomLog logs/ovirt-requests-log "%t %h \"Correlation-Id: %{Correlation-Id}o\" \"Duration: %Dus\" \"%r\" %b" "expr=%{QUERY_STRING} !~ /username.*password|password.*username/" then blocked local logging to messages with local1.none in rsyslog.conf.

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