High Performance VMs - cpu pinning
by Angus Clarke
Hi
In 4.10.1. Creating a High Performance Virtual Machine, Template, or Pool
https://www.ovirt.org/documentation/virtual_machine_management_guide/inde...
I need some help trying to understand this section, please see my comments "> inline".
<-- snip
Pinning topology:
The first two CPUs of each NUMA node are pinned.
> OK, so the first 2 pCPUs of the NUMA node are used for I/O and emulator threads.
If all vCPUs fit into one NUMA node of the host:
> Yes, they do ...
The first two vCPUs are automatically reserved/pinned
> Are the first 2 vCPUs automatically pinned to the I/O and Emulator thread pCPUs mentioned in previous point?
The remaining vCPUs are available for manual vCPU pinning
<-- snip
So if I create a High Performance VM with 6 vCPUs, I should:
- Don't pin vCPUs 0 and 1
- Do pin vCPUs 2,3,4 and 5
All other High Performance VMs within the same NUMA node have their first 2 vCPUs automatically pinned (presumably to the I/O and emulator thread pCPUs)
What do you think?
Thanks
Angus
4 months, 2 weeks
What is the correct way to update Ovirt/Hosts from 4.5
by a_kagra＠jea.ca
Hello,
I am currently sitting on oVirt 4.5 and I have 5 Linux hosts. I was hoping I could get some insight as to the correct way to get things updated. I am seeing the dashboard throw errors for each of my 5 hosts with the following error:
Failed to check for available updates on host _______ with message 'Task Ensure Python3 is installed for CentOS/RHEL8 hosts failed to execute. Please check logs for more details: /var/log/ovirt-engine/host-deploy/ovirt-host-mgmt-ansible-check-20240822085114-10.100.50.14.log
If I look at that log and grep the error I see:
"fatal: [10.x.x.14]: FAILED! => {\"changed\": false, \"msg\": \"Failed to download metadata for repo 'ovirt-4.4-centos-ceph-pacific': Cannot prepare internal mirrorlist: Curl error (6): Couldn't resolve host name for http://mirrorlist.centos.org/?release=8-stream&arch=x86_64&repo=storage-c... [Could not resolve host: mirrorlist.centos.org]\"
Here is details on my ovirt-engine host:
ovirt-engine-4.5.4-1.el8.noarch
yum.repos.d]# ls
CentOS-Ceph-Pacific.repo epel-modular.repo
CentOS-Gluster-10.repo epel-next.repo
CentOS-NFV-OpenvSwitch.repo epel-next-testing.repo
CentOS-OpsTools.repo epel.repo
CentOS-oVirt-4.5.repo epel-testing-modular.repo
CentOS-Storage-common.repo epel-testing.repo
CentOS-Stream-Extras-common.repo ovirt-4.4-dependencies.repo
CentOS-Stream-Extras.repo ovirt-4.4.repo
elastic.repo redhat.repo
And info on my hosts:
OS:
NAME="CentOS Stream"
VERSION="8"
ID="centos"
ID_LIKE="rhel fedora"
VERSION_ID="8"
PLATFORM_ID="platform:el8"
PRETTY_NAME="CentOS Stream 8"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:centos:centos:8"
HOME_URL="https://centos.org/"
BUG_REPORT_URL="https://bugzilla.redhat.com/"
REDHAT_SUPPORT_PRODUCT="Red Hat Enterprise Linux 8"
REDHAT_SUPPORT_PRODUCT_VERSION="CentOS Stream"
packages:
ovirt-hosted-engine-ha-2.5.0-1.el8.noarch
ovirt-vmconsole-1.0.9-1.el8.noarch
ovirt-release44-4.4.10.3-1.el8.noarch
python39-ovirt-imageio-common-2.4.7-1.el8.x86_64
ovirt-imageio-client-2.4.7-1.el8.x86_64
ovirt-host-4.5.0-3.el8.x86_64
ovirt-openvswitch-ovn-2.15-4.el8.noarch
ovirt-imageio-common-2.4.7-1.el8.x86_64
ovirt-openvswitch-ipsec-2.15-4.el8.noarch
ovirt-hosted-engine-setup-2.7.0-1.el8.noarch
ovirt-engine-appliance-4.5-20221206133948.1.el8.x86_64
python3-ovirt-setup-lib-1.3.3-1.el8.noarch
ovirt-host-dependencies-4.5.0-3.el8.x86_64
ovirt-vmconsole-host-1.0.9-1.el8.noarch
python39-ovirt-imageio-client-2.4.7-1.el8.x86_64
ovirt-openvswitch-ovn-common-2.15-4.el8.noarch
ovirt-ansible-collection-3.0.0-1.el8.noarch
python39-ovirt-engine-sdk4-4.6.0-1.el8.x86_64
ovirt-provider-ovn-driver-1.2.36-1.el8.noarch
ovirt-openvswitch-ovn-host-2.15-4.el8.noarch
centos-release-ovirt45-8.9-1.el8s.noarch
ovirt-openvswitch-2.15-4.el8.noarch
cockpit-ovirt-dashboard-0.16.2-1.el8.noarch
ovirt-imageio-daemon-2.4.7-1.el8.x86_64
python3-ovirt-engine-sdk4-4.6.0-1.el8.x86_64
ovirt-python-openvswitch-2.15-4.el8.noarch
ovirt-hosted-engine-ha-2.5.0-1.el8.noarch
Now on my ovirt-engine host, I can't run yum update _____ as it seems the mirrorlists are EOL So my question is below:
What would be the best/safest way to update everything on my ovirt-engine and hosts, I am already on 4.5.4 but I know there is a current 4.5.6 release and would doing this update fix the packages on my machines?
4 months, 2 weeks
How to switch oVirt from Cockpit from RHEL9?
by libra.85gwd＠gmail.com
Hi Community,
I am using KVM in RHEL9, and for the web interface, I am using Cockpit. I just learned about the oVirt, and it looks much better than the cockpit. How can install oVirt in my rhel9 without causing an issue? Do I need to uninstall KVM first? Can someone please guide me so that I don't screw things up since I have many virtual machines in the system?
Appreciate your help!
4 months, 2 weeks
