Provide BFD based health-check for VMIs

[Ananth Suryanarayana]

This is a bug to track bfd based health checker changes.
blue print is at https://blueprints.launchpad.net/juniperopenstack/+spec/bfd-over-vmis
Spec at the moment is at https://github.com/rombie/contrail-controller/blob/bfd_spec/specs/bfd_health_check.md

Original spec is at https://blueprints.launchpad.net/opencontrail/+spec/bfd

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/27415
Submitter: Ananth Suryanarayana (<email address hidden>)

[Ananth Suryanarayana (anantha-l)]

https://github.com/rombie/contrail-controller/blob/bfd_spec/specs/bfd_health_check.md

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/27415
Submitter: Ananth Suryanarayana (<email address hidden>)

[Ananth Suryanarayana (anantha-l)]

Feature blueprint is at https://blueprints.launchpad.net/juniperopenstack/+spec/bfd-over-vmis

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/27415
Submitter: Ananth Suryanarayana (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/32043
Submitter: Ananth Suryanarayana (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/32101
Submitter: Ananth Suryanarayana (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/27415
Submitter: Ananth Suryanarayana (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Reviewed: https://review.opencontrail.org/27415
Committed: http://github.com/Juniper/contrail-controller/commit/b1ef13cdcccb7f23f365fb6421432d890dfd624a
Submitter: Zuul (<email address hidden>)
Branch: master

commit b1ef13cdcccb7f23f365fb6421432d890dfd624a
Author: Ananth Suryanarayana <email address hidden>
Date: Mon Dec 19 12:05:21 2016 -0800

Provide BFD based health check

This is initial proposal to provide BFD based health-checker for VMIs

Change-Id: Ic735598531a10ff023a2bb3bc81dba200a6f3d87
Partial-Bug: #1651224

[OpenContrail Admin (ci-admin-f)]

Reviewed: https://review.opencontrail.org/32043
Committed: http://github.com/Juniper/contrail-controller/commit/6295c06dfba1f96fbb1f14e51d9e2d9be729b45a
Submitter: Zuul (<email address hidden>)
Branch: master

commit 6295c06dfba1f96fbb1f14e51d9e2d9be729b45a
Author: Ananth Suryanarayana <email address hidden>
Date: Tue May 23 16:39:22 2017 -0700

Initial commit for BFD based health checker

o Add Direct API based support for clients (in addition to REST)
to add/remove BFD connections
o Update schema with bfd parameters (Increase resolution to usecs)
o Extend BFD connection support to overlapping destination address
by introducing BFD::SessionKey structure. This includes
ifindex/vrfindex in additionl to destination IP address
o Add support for multi-hop bfd sessions (Basically just use a different
udp port number and identify session using vrf-index instead of
ifindex)
o Process all BFD events (add, delete, packet processing, etc) into a
separate task. BFD timers also run off this task.
o Add more BFD UTs
o Add coverage targets to bfd uts

TODO
o More unit tests
o Configuration updates
o Integration with agent's health-check.cc
o Integration with packet send and recv over pkt0 interface

Change-Id: Icbcbc0e6b767917201fa3dba19758526517b4c79
Partial-Bug: 1651224

[OpenContrail Admin (ci-admin-f)]

Reviewed: https://review.opencontrail.org/32101
Committed: http://github.com/Juniper/contrail-controller/commit/4ba3c16d640475320d3282bc677eed71f9396913
Submitter: Zuul (<email address hidden>)
Branch: master

commit 4ba3c16d640475320d3282bc677eed71f9396913
Author: Ananth Suryanarayana <email address hidden>
Date: Wed May 24 12:33:06 2017 -0700

Stablilize bfd_client_test

Use task_util::TaskFire() and inspect BFD data structures inside BFD task

Change-Id: Ied36b69513323d1f4d848bb12e7f2c8bb9c64bd2
Partial-Bug: 1651224

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/33926
Submitter: Hari Prasad Killi (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Reviewed: https://review.opencontrail.org/33926
Committed: http://github.com/Juniper/contrail-controller/commit/189b8b7f10c0f9aa0962c8748200ea6085ddef02
Submitter: Zuul (<email address hidden>)
Branch: master

commit 189b8b7f10c0f9aa0962c8748200ea6085ddef02
Author: Hari Prasad Killi <email address hidden>
Date: Sun Jul 23 12:40:02 2017 +0530

Vrouter Agent changes to handle BFD based health check

When BFD health check is configured or removed, start / stop BFD sessions.
Also handle send and receive of BFD packets between VMI and the BFD library.

Change-Id: If4dcc78f7fc11180c0a4658c7f338b250ef0f9a9
partial-bug: #1651224
Implements: blueprint provide bfd based liveliness detection for vmis

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/34089
Submitter: Hari Prasad Killi (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Reviewed: https://review.opencontrail.org/34089
Committed: http://github.com/Juniper/contrail-controller/commit/faebf7369a1fde46d5173d1d1975e1b53049034b
Submitter: Zuul (<email address hidden>)
Branch: master

commit faebf7369a1fde46d5173d1d1975e1b53049034b
Author: Hari Prasad Killi <email address hidden>
Date: Thu Jul 27 20:06:05 2017 +0530

Allow flow setup for BFD

For BFD flows, always allow flow setup even when interface is inactive &
interface route is removed. Also, added some traces.

Change-Id: Id7f59e690cff6dc3be50b9cd349400d0d1138a33
partial-bug: #1651224
Implements: blueprint provide bfd based liveliness detection for vmis