[Bug 1884734] Re: OVN deployment issues with high CPU load and disconnects

[Michal Nasiadka]

Update: it seems there is a bug in kolla-ansible causing this - we are
setting OVS system-id based on {{ inventory_hostname_short }} and if
Ansible inventory contains ip addresses - it will cause multiple OVN
chassis to have the same system-id - and they will ,,override'' each
other - which means OVN will get multiple create/delete events per
second - which results in 100% CPU usage of Neutron and OVSDB.

** No longer affects: cloud-archive

** Also affects: kolla-ansible/ussuri
   Importance: Undecided
       Status: New

** Also affects: kolla-ansible/victoria
   Importance: Undecided
       Status: New

** Changed in: kolla-ansible/ussuri
       Status: New => Triaged

** Changed in: kolla-ansible/victoria
       Status: New => Triaged

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https://bugs.launchpad.net/bugs/1884734

Title:
  OVN deployment issues with high CPU load and disconnects

Status in Ubuntu Cloud Archive ussuri series:
  New
Status in Ubuntu Cloud Archive victoria series:
  New
Status in kolla-ansible:
  In Progress
Status in kolla-ansible ussuri series:
  Triaged
Status in kolla-ansible victoria series:
  In Progress
Status in openvswitch package in Ubuntu:
  New
Status in openvswitch source package in Focal:
  New
Status in openvswitch source package in Groovy:
  New

Bug description:
  Using: kolla and kolla-ansible 10.0.0rc2, Ussuri

  Problem: networking environment in OpenStack is unstable and unusable.

  OS, OVN versions and logs: http://paste.openstack.org/show/795087/
  Neutron server logs: http://paste.openstack.org/show/795088/

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