I found  that keepalived VIP switch cause TCP connections  that refuse to die on host where VIP was before  it was switched.

I filled a bug here -> https://bugs.launchpad.net/kolla-ansible/+bug/1917068

Fixed here -> https://review.opendev.org/c/openstack/kolla-ansible/+/777772

Video presentation of bug here -> https://download.kevko.ultimum.cloud/video_debug.mp4

I was just curious and wanted to ask here in openstack-discuss :

If someone already seen this issue in past ?

If yes, do you tweak net.ipv4.tcp_retries2 kernel parameter ?