Hi, I really like the tool, thank you. also confirms my idea as this kernel option is also used by other projects where they explicitly mention case with keepalived/VIP switch. Now I definitively think this should be handled also in kolla-ansible. Thanks, Michal Arbet ( kevko ) Dne po 1. 3. 2021 9:53 uživatel Mark Goddard <mark@stackhpc.com> napsal:
On Fri, 26 Feb 2021 at 17:08, Michal Arbet <michal.arbet@ultimum.io> wrote:
Hi,
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 ? If no, how did you solve this ?
Hi Michal, thanks for the investigation here. There is a nice tool, that I found far too late, that helps to help answer questions like this: https://codesearch.opendev.org/
Thank you, Michal Arbet ( kevko )