It is weird because I log in to neutron_l3_agent and see that 

/var/lib/neutron/kolla/ha_confs/431e2992-d4c5-42b9-96b3-1c932b6b750f/state have right state on both side but neutron consider it is active-active or standby-standby.

Nguyen Huu Khoi

On Sat, Apr 12, 2025 at 9:29 PM Nguyễn Hữu Khôi <nguyenhuukhoinw@gmail.com> wrote:

I see this bug  https://review.opendev.org/c/openstack/kolla-ansible/+/481969 but

 /usr/local/bin/neutron-l3-agent-wrapper.sh then:

This program is using eventlet and has been monkey_patched

Nguyen Huu Khoi

On Sat, Apr 12, 2025 at 9:02 PM Nguyễn Hữu Khôi <nguyenhuukhoinw@gmail.com> wrote:

Hello.,

I deploy a multi node cluster with 2 network nodes separately with l3_ha=true and max_l3_agents_per_router=2. It is ok but when I restart neutron_l3_agent on a host which has an active router then 2 routers  become standby-standby or active-active.

I feel 2 network nodes very easily to split brain. Could I have some ideas on this problem. Thank you.

openstack 2025.1-master

kolla-ansible2025.1 master

ubuntu 22.04

Nguyen Huu Khoi