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[Inessa Vasilevskaya <ivasilevskaya@xxxxxxxxxxxx>]

Public bug reported:

Seen on: multinode devstack (1 controller/1 compute)

Steps to reproduce:

1. boot a vm, verify that it can be reached
2. reboot the vm with nova reboot
3. check that the vm can't be reached anymore (on different deployments reproducibility varied from 50% to 100%)

The reason for connectivity loss is that ofport number corresponding to
vm's tap interface doesn't match in_port number in ovs flows generated
by the firewall. I suspect a race of some kind between tap interface
plugging into br-int and the generation of ovs flows for a new vm.

Port numbers will match again after issuing nova shelve/unshelve.

no connectivity after reboot - http://paste.openstack.org/show/602726/
connectivity regained after shelve/unshelve - http://paste.openstack.org/show/602729/

** Affects: neutron
     Importance: Undecided
     Assignee: Inessa Vasilevskaya (ivasilevskaya)
         Status: New


** Tags: ovs-fw ovs-lib

** Changed in: neutron
     Assignee: (unassigned) => Inessa Vasilevskaya (ivasilevskaya)

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https://bugs.launchpad.net/bugs/1673027

Title:
  ovsfw: no vm connectivity after nova reboot

Status in neutron:
  New

Bug description:
  Seen on: multinode devstack (1 controller/1 compute)

  Steps to reproduce:

  1. boot a vm, verify that it can be reached
  2. reboot the vm with nova reboot
  3. check that the vm can't be reached anymore (on different deployments reproducibility varied from 50% to 100%)

  The reason for connectivity loss is that ofport number corresponding
  to vm's tap interface doesn't match in_port number in ovs flows
  generated by the firewall. I suspect a race of some kind between tap
  interface plugging into br-int and the generation of ovs flows for a
  new vm.

  Port numbers will match again after issuing nova shelve/unshelve.

  no connectivity after reboot - http://paste.openstack.org/show/602726/
  connectivity regained after shelve/unshelve - http://paste.openstack.org/show/602729/

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