yahoo-eng-team team mailing list archive

[Slawek Kaplonski <1857021@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

In some cases when one subnet with some CIDR is removed from router and
immediately removed and other subnet with same CIDR is created and added
to the same router in very short time, it may happen that router port
will not have IP address configured and subnet will be "isolated" so no
traffic to/from other subnets connected to same router will be possible.

It happens in L3 HA case because IP address from "old" port is still in
Keepalived's vips list so it's skipped to be added to this list from new
port.

** Affects: neutron
     Importance: Medium
     Assignee: Slawek Kaplonski (slaweq)
         Status: Confirmed


** Tags: l3-ha

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https://bugs.launchpad.net/bugs/1857021

Title:
  Wrong order of adding/deleting router ports may end up with not
  configured router port

Status in neutron:
  Confirmed

Bug description:
  In some cases when one subnet with some CIDR is removed from router
  and immediately removed and other subnet with same CIDR is created and
  added to the same router in very short time, it may happen that router
  port will not have IP address configured and subnet will be "isolated"
  so no traffic to/from other subnets connected to same router will be
  possible.

  It happens in L3 HA case because IP address from "old" port is still
  in Keepalived's vips list so it's skipped to be added to this list
  from new port.

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