- openstack-discuss - lists.openstack.org

[nova][sdk] Compute host query filter on list servers
by Winicius Allan 17 Oct '25

17 Oct '25

When building a script that utilizes openstacksdk, I encountered a problem while filtering servers by compute host. According to the documentation[1], I need to refer to the Compute API to find the available query parameters. On the API docs, the proper query param is just `host` instead of compute_host. I raised a discussion in[2]. I'd like to know the maintainers' opinions on this, and the decisions made. [1] https://docs.openstack.org/openstacksdk/latest/user/proxies/compute.html#se… [2] https://bugs.launchpad.net/openstacksdk/+bug/2101016

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[Caracal]Optimizing Nova NUMA Scheduling Behavior (Single vs Dual NUMA Socket Allocation)
by Vish Mudemela 17 Oct '25

17 Oct '25

Hi Team, We are using Kolla Ansible for our OpenStack Caracal (2024.1) deployment across two production sites. We have observed that the Nova scheduler is currently allocating virtual machines (VMs) only on a single NUMA socket of the compute host. Since our flavors do not include the property hw:numa_nodes='2', the scheduler places all vCPUs and memory for a VM on a single NUMA node, leaving the other NUMA socket(s) underutilized. In our testing, we added the hw:numa_nodes='2' property to the flavor and confirmed that the scheduler can now distribute vCPUs across both NUMA sockets. However, this configuration led to 20–30% memory performance degradation, likely due to cross-NUMA memory access. We also noticed that once this property is set, the scheduler always attempts to spread vCPUs across two NUMA sockets — even when there are sufficient resources available on a single NUMA node. We are looking for a way to achieve conditional NUMA placement — ideally: - If a single NUMA node has enough capacity, schedule the VM entirely on that node. - Otherwise, allow the scheduler to spread the VM across multiple NUMA nodes. We would appreciate any suggestions or best practices to: Improve NUMA-aware scheduling efficiency,Better utilize both NUMA sockets without significant memory performance penalties, andAvoid forcing cross-NUMA allocation unless necessary. Has anyone in the community implemented or tuned Nova in a way that balances these requirements effectively? Thanks in advance for your insights and recommendations. Thanks

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[nova] Persistent PXE boot for VMs
by Eugen Block 17 Oct '25

17 Oct '25

Good morning, we have the requirement to let a subset of VMs always boot in PXE mode. They're managed by a Uyuni server that controls whether a VM has to be (re)installed or if it should boot from local disk. I've been searching and testing, but to no avail yet, except for modifying the xml file which will not persist [0]. Is there a known history why this isn't possible (yet) or has this already been discussed and the decision was to not implement such a feature? We're thinking about implementing a solution for us, but would be also interested if a PR would have a chance to be accepted. If anyone has some insights/ideas/recommendations, I'd appreciate it. Thanks! Eugen [0] https://blog.dachary.org/2012/10/08/network-boot-an-openstack-instance/

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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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[Octavia][Load Balancer][2023.1] Amphora Fails Health Check – “No Route to Host” & Timeout Errors
by Thamanna Farhath 15 Oct '25

15 Oct '25

Hi OpenStack Community, I am currently facing an issue with the Load Balancer (Octavia) service in my OpenStack deployment and would appreciate your guidance or suggestions on how to troubleshoot and resolve it. Environment Details: OpenStack Version: 2023.1 (Antelope) Operating System: Ubuntu 22.04 Octavia Backend: Amphora Network Type: VXLAN Deployment Tool: Kolla Ansible Issue Summary: After creating a Load Balancer, the Amphora instance is successfully launched. However, approximately 18 minutes later, the Load Balancer transitions to an ERROR state. Error Observed: octavia.common.exceptions.ComputeWaitTimeoutException: Waiting for compute id a222527f-8336-4fb1-8e9e-0e3ac6e8d580 to go active timeout. octavia.amphorae.driver_exceptions.exceptions.AmpConnectionRetry: Could not connect to amphora, exception caught: HTTPSConnectionPool(host='192.168.200.247', port=9443): Max retries exceeded with url: // (Caused by NewConnectionError: Failed to establish a new connection: [Errno 113] No route to host) What I’ve Tried: Created a VXLAN-based internal network: openstack subnet create --network octavia-mgmt-net --subnet-range 192.168.200.0/24 octavia-mgmt-subnet openstack router create octavia-router openstack router add subnet octavia-router octavia-mgmt-subnet openstack router set octavia-router --external-gateway <public-network-id> Manually configured OVS interface: ovs-vsctl add-port br-int octavia-mgmt -- set interface octavia-mgmt type=internal ip addr add 192.168.200.1/24 dev octavia-mgmt ip link set octavia-mgmt up Security groups are open (allowing all ingress and egress). Verified OVS bridge setup – interface appears correctly on br-int. Behavior Noticed: Amphora instance gets created but fails to communicate with the controller after a while,so health checks fails. The controller cannot reach the Amphora management IP (192.168.200.x). Logs show heartbeat/connection issues (No route to host, timeouts). Request for Help: I would appreciate any of the following: Suggestions to verify if the management network is properly routed from controller to Amphora. Best practices for setting up the Octavia management network using VXLAN. Troubleshooting steps for verifying health manager connectivity to Amphora. Disclaimer : The content of this email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to which they are addressed. If you have received this email in error, please notify the sender and remove the messages from your system. If you are not the named addressee, it is strictly forbidden for you to share, circulate, distribute or copy any part of this e-mail to any third party without the written consent of the sender. E-mail transmission cannot be guaranteed to be secured or error free as information could be intercepted, corrupted, lost, destroyed, arrive late, incomplete, or may contain viruses. Therefore, we do not accept liability for any errors or omissions in the contents of this message, which arise as a result of e-mail transmission. The recipient should check this e-mail and any attachments for the presence of viruses. The company accepts no liability for any damage caused by any virus transmitted by this email."

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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 14 Oct '25

14 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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