yahoo-eng-team team mailing list archive

[Clint Byrum <clint@xxxxxxxxxx>]

Public bug reported:

This is a race condition.

Given a cloud with 0 compute nodes available, on a compute node:
* Start up neutron-openvswitch-agent
* Start up nova-compute
* nova boot an instance

Scenario 1:
* neutron-openvswitch-agent registers with Neutron before nova tries to boot instance
* port is bound to agent
* instance boots with correct networking

Scenario 2:
* nova schedules instance to host before neutron-openvswitch-agent is registered with Neutron
* nova instance fails with vif_type=binding_failed
* instance is in ERROR state

I would expect that Nova would not try to schedule instances on compute
hosts that are not ready.

Please also see this mailing list thread for more info:

http://lists.openstack.org/pipermail/openstack-
dev/2013-December/022084.html

** Affects: nova
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1260440

Title:
  nova-compute host is added to scheduling pool before Neutron can bind
  network ports on said host

Status in OpenStack Compute (Nova):
  New

Bug description:
  This is a race condition.

  Given a cloud with 0 compute nodes available, on a compute node:
  * Start up neutron-openvswitch-agent
  * Start up nova-compute
  * nova boot an instance

  Scenario 1:
  * neutron-openvswitch-agent registers with Neutron before nova tries to boot instance
  * port is bound to agent
  * instance boots with correct networking

  Scenario 2:
  * nova schedules instance to host before neutron-openvswitch-agent is registered with Neutron
  * nova instance fails with vif_type=binding_failed
  * instance is in ERROR state

  I would expect that Nova would not try to schedule instances on
  compute hosts that are not ready.

  Please also see this mailing list thread for more info:

  http://lists.openstack.org/pipermail/openstack-
  dev/2013-December/022084.html

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