[Bug 1999761] Re: Do not depend on l3-agent for vpn failover

[Lajos Katona]

Patch for this bug: https://review.opendev.org/c/openstack/neutron-vpnaas/+/868307
and in Neutron: https://review.opendev.org/c/openstack/neutron/+/867769

** Changed in: neutron-vpnaas (Ubuntu)
       Status: New => In Progress

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https://bugs.launchpad.net/bugs/1999761

Title:
  Do not depend on l3-agent for vpn failover

Status in neutron-vpnaas package in Ubuntu:
  In Progress

Bug description:
  The keepalived statate tracking script is not stable, often state of router is not reflected in neutron database correctly. Related issue was reported some time ago https://bugs.launchpad.net/neutron/+bug/1970944 
  Also if python process is down failover will not happen. We should avoid relying on python process in dataplane failover for HA routers. Similar task is opened for IPv6 failover https://bugs.launchpad.net/neutron/+bug/1677279

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