- openstack-discuss - lists.openstack.org

[nova][query]Memory performance issue while using property "hw:numa_nodes='2'" in flavors
by brijesh.mishra＠five9.com 17 Oct '25

17 Oct '25

Hi Team We have use Kolla ansible for openstack Caracal 2024.1 deployment. Having 2 production sites, we have observer that the Nova scheduler is allocating virtual machines (VMs) only on a single NUMA socket of the compute host. Since the flavor does not include the property hw:numa_nodes='2', vCPUs spread on two NUMA nodes scheduling is not enabled. As a result, all vCPUs and memory for a VM are placed on a single NUMA node, while the other NUMA socket(s) remain underutilized. So we tested this property in our test flavor and found that now scheduler is able to spread vcpu/vm across two numa sockets but performance on memory side is degraded for about 20% to 30%. So we are looking for suggestions on this if there is better way to accommodate more VMs or spread vcpu on two numa socket without having performance issues on memory or cpu side, or something which have less impact? Regards Brijesh

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[nova][numa] Memory performance issue while using property "hw:numa_nodes='2'" in flavors
by brijesh.mishra＠five9.com 17 Oct '25

17 Oct '25

Hi Team We have use Kolla ansible for openstack Caracal 2024.1 deployment. Having 2 production sites, we have observer that the Nova scheduler is allocating virtual machines (VMs) only on a single NUMA socket of the compute host. Since the flavor does not include the property hw:numa_nodes='2', vCPUs spread on two NUMA nodes scheduling is not enabled. As a result, all vCPUs and memory for a VM are placed on a single NUMA node, while the other NUMA socket(s) remain underutilized. So we tested this property in our test flavor and found that now scheduler is able to spread vcpu/vm across two numa sockets but performance on memory side is degraded for about 20% to 30%. So we are looking for suggestions on this if there is better way to accommodate more VMs or spread vcpu on two numa socket without having performance issues on memory or cpu side, or something which have less impact? Regards Brijesh

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[nova][numa] Memory performance issue while using property "hw:numa_nodes='2'" in flavors
by brijesh.mishra＠five9.com 17 Oct '25

17 Oct '25

Hi Team We have use Kolla ansible for openstack Caracal 2024.1 deployment. Having 2 production sites, we have observer that the Nova scheduler is allocating virtual machines (VMs) only on a single NUMA socket of the compute host. Since the flavor does not include the property hw:numa_nodes='2', vCPUs spread on two NUMA nodes scheduling is not enabled. As a result, all vCPUs and memory for a VM are placed on a single NUMA node, while the other NUMA socket(s) remain underutilized. So we tested this property in our test flavor and found that now scheduler is able to spread vcpu/vm across two numa sockets but performance on memory side is degraded for about 20% to 30%. So we are looking for suggestions on this if there is better way to accommodate more VMs or spread vcpu on two numa socket without having performance issues on memory or cpu side, or something which have less impact? Regards Brijesh

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[nova][numa] Memory performance issue while using property "hw:numa_nodes='2'" in flavors
by brijesh.mishra＠five9.com 17 Oct '25

17 Oct '25

Hi Team We have use Kolla ansible for openstack Caracal 2024.1 deployment. Having 2 production sites, we have observer that the Nova scheduler is allocating virtual machines (VMs) only on a single NUMA socket of the compute host. Since the flavor does not include the property hw:numa_nodes='2', vCPUs spread on two NUMA nodes scheduling is not enabled. As a result, all vCPUs and memory for a VM are placed on a single NUMA node, while the other NUMA socket(s) remain underutilized. So we tested this property in our test flavor and found that now scheduler is able to spread vcpu/vm across two numa sockets but performance on memory side is degraded for about 20% to 30%. So we are looking for suggestions on this if there is better way to accommodate more VMs or spread vcpu on two numa socket without having performance issues on memory or cpu side, or something which have less impact? Regards Brijesh

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[neutron] Drivers meeting canceled next two weeks
by Brian Haley 16 Oct '25

16 Oct '25

Hello Neutrinos: I am going to cancel the next two Drivers meeting as there are no topics and the PTG is coming up - please just add things to the etherpad so we can discuss there [0]. And just a reminder there are still open specs that need updates and/or review, list is at [1]. Have a nice weekend! -Brian [0] https://etherpad.opendev.org/p/oct2025-ptg-neutron [1] https://review.opendev.org/q/status:open+project:openstack/neutron-specs

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[neutron][ovn][ovn-bgp-agent] Backports and reviews
by Mohammed Naser 16 Oct '25

16 Oct '25

Hi team, We've pushed out several fixes that include trivial bug fix backports and a bigger rework of the driver ecosystem which have sat dormant for a few months now: - https://review.opendev.org/c/openstack/ovn-bgp-agent/+/947151 - https://review.opendev.org/c/openstack/ovn-bgp-agent/+/947152 - https://review.opendev.org/c/openstack/ovn-bgp-agent/+/947153 These ones have sat so long that they've hit merge conflicts: - https://review.opendev.org/c/openstack/ovn-bgp-agent/+/944300 - https://review.opendev.org/c/openstack/ovn-bgp-agent/+/937457 We've resorted to downstream and they've been working in production for a long time, however, we really want to make sure the ecosystem in OpenStack doesn't become a downstream-best one. Thanks Mohammed

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[horizon] add microversion support for Nova live migration
by Mohammed Naser 16 Oct '25

16 Oct '25

Hi team, We've pushed this change out for nearly a month with no reviews, I would like to please have the Horizon team have a look at this change. https://review.opendev.org/c/openstack/horizon/+/961099 Thank you, Mohammed

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[neutron] Next two weeks CI meeting cancelled
by Yatin Karel 16 Oct '25

16 Oct '25

Hello Neutron Team !! As discussed in the last CI meeting I will not be around upcoming Monday, so cancelling the meeting. Also proposing to cancel the follow up week as that's PTG week. So we will have our next CI meeting on 03rd November. -- Thanks and Regards Yatin Karel

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How to set admin password during server create but not using user-data file
by Ahmad Milad Pour 15 Oct '25

15 Oct '25

Hello there, This is how I download an ubuntu cloud image: wget -c https://cloud-images.ubuntu.com/noble/current/noble-server-cloudimg-amd64.i… -O ~/noble-server-cloudimg-amd64.img virt-customize -a noble-server-cloudimg-amd64.img \ --timezone Asia/Tehran \ --root-password password:q \ --run-command 'sed -i "s/^disable_root.*/disable_root: false/" /etc/cloud/cloud.cfg' \ --run-command 'grep -q "^ssh_pwauth:" /etc/cloud/cloud.cfg && sed -i "s/^ssh_pwauth:.*/ssh_pwauth: true/" /etc/cloud/cloud.cfg || echo "ssh_pwauth: true" >> /etc/cloud/cloud.cfg' \ --run-command 'printf "PasswordAuthentication yes\nPermitRootLogin yes\n" > /etc/ssh/sshd_config.d/99-allow-root.conf' \ --run-command "sed -e 's/^[# ]*PasswordAuthentication.*/PasswordAuthentication yes/g' -i /etc/ssh/sshd_config || true" \ --run-command "sed -e 's/^[# ]*PermitRootLogin.*/PermitRootLogin yes/g' -i /etc/ssh/sshd_config || true" \ --run-command 'systemctl enable ssh || systemctl enable sshd' \ --run-command 'systemctl disable systemd-networkd-wait-online.service' openstack image create --file ~/noble-server-cloudimg-amd64.img --disk-format qcow2 --container-format bare --public --property os_distro=ubuntu --property hw_qemu_guest_agent=yes "Ubuntu 24" || true rm -f noble-server-cloudimg-amd64.img cat <<EOF > /root/userdata.txt #cloud-config chpasswd: list: | root:q expire: False ssh_pwauth: True cmd: - systemctl disable systemd-networkd-wait-online.service EOF openstack server create --image "Ubuntu 24" --flavor first --network public_network --config-drive True ahmad --password 'ahmad' This is how I create image. I'm going to find a way if possible, to set the admin password during the "server create". Currently the root login is only possible with password "q". The "ahmad" is not working. I know I can change it via user-data file (I intentionally added there but not using it), but the question is can I set the password during the server create? I tried to use "virt-customize --install qemu-guest-agent", but the virt-customize has no network, so no installation. I also know I can do this: 1. create server 2. do whatever I want (install guest agent, etc) 3. create snapshot 4. create server from that snapshot But the issue is it's not automatic (I should manually login to do the modification) and its size is much more than the cloud image. Like, from 500 megabytes which is cloud image, goes around 3 gigabytes which is the snapshot. Any ways to reach what I'm looking for? Or even any better ways to do that? Regards, Ahmad

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[Skyline] Core Reviewer Nomination - Reet Srivastava (reetsrivastava)
by Reet Srivastava 15 Oct '25

15 Oct '25

Hi team, I am writing to nominate myself(Reet Srivastava) as a contributor and core reviewer for the skyline project. Over the past three months I have made significant contributions to the Skyline project. Some of my contributions are : feat: Add configurable user default domain for login (959304) · Gerrit Code Review<https://review.opendev.org/c/openstack/skyline-apiserver/+/959304> feat:adds barbican panel(named Key-Manager) (958515) · Gerrit Code Review<https://review.opendev.org/c/openstack/skyline-console/+/958515> feat: Add Unrescue feature to nova instance actions (961359) · Gerrit Code Review<https://review.opendev.org/c/openstack/skyline-console/+/961359> feat: Make default user domain configurable and improve username handling (959284) · Gerrit Code Review<https://review.opendev.org/c/openstack/skyline-console/+/959284> (In Progress) I believe I can help uphold the quality of our codebase and support contributors in their development efforts. I’d be grateful for your feedback and support regarding this nomination. Thanks for your time and consideration. Best Regards, Reet Srivastava Gerrit Username - reetsrivastava

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