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[Launchpad Bug Tracker <1513144@xxxxxxxxxxxxxxxxxx>]

[Expired for neutron because there has been no activity for 60 days.]

** Changed in: neutron
       Status: Incomplete => Expired

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https://bugs.launchpad.net/bugs/1513144

Title:
  [RFE] Allow admin to mark agents down

Status in neutron:
  Expired

Bug description:
  Cloud administrators have monitoring systems externally placed
  watching different types of resources of their cloud infrastructures.
  A cloud infrastructure is comprehended not exclusively by an OpenStack
  instance but also other components not managed by and possibly not
  visible to OpenStack such as SDN controller, physical network
  elements, etc.

  External systems may detect a fault on one of multiple of
  infrastructure resources that subsequently may affect services being
  provided by OpenStack. From a network perspective, an example of a
  fault can be the crashing of openvswitch on a compute node.

  When using the reference implementation (ovs + neutron-l2-agent),
  neutron-l2-agent will continue reporting to the Neutron server its
  state as alive (there's heartbeat; service's up ), although there's an
  internal error caused by unreachability to the virtual bridge (br-
  int). By means of external tools to OpenStack monitoring openvswitch,
  the administrator knows there's something wrong and as a fault
  management action he may want to explicitly set the agent state down.

  Such action requires a new API exposed by Neutron allowing admins to
  set (true/false) the aliveness state of Neutron agents.

  This feature request goes in line with the work proposed to Nova [1]
  and implemented in Liberty. The same is also being currently proposed
  to Cinder [2]

  [1] https://blueprints.launchpad.net/nova/+spec/mark-host-down
  [2] https://blueprints.launchpad.net/cinder/+spec/mark-services-down

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