contrail-svc-monitor brings services down if analytics is unavailable or is recomputing vrouter UVEs

[Ato]

Yuvaraja is aware of this and has a fix.

contrail-svc-monitor relies on vrouter status UVEs in order to determine what vrouters can run a service instance such as neutron LBaaS. Any of the following two triggers:

- Analytics unreachable
- Analytics initializing UVEs and temporarily considering vrouters as down.

Can make contrail-svc-monitor mistakenly believe vrouters are down and as a result contrail-svc-monitor shuts down the service instances. This bug is open in order to provide more robustness and intelligence for contrail-svc-monitor to distinguish the cases where the problem is on analytics and not on vrouters.

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/32678
Submitter: Yuvaraja Mariappan

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/32684
Submitter: Yuvaraja Mariappan

[OpenContrail Admin (ci-admin-f)]

Reviewed: https://review.opencontrail.org/32678
Committed: http://github.com/Juniper/contrail-controller/commit/2de32414d20bf5544b3a0b11dea3ef06ab357421
Submitter: Zuul (<email address hidden>)
Branch: R3.2

commit 2de32414d20bf5544b3a0b11dea3ef06ab357421
Author: Yuvaraja Mariappan <email address hidden>
Date: Thu Jun 8 12:24:57 2017 -0700

Fixed contrail-analytics unavailablity issue

contrail-svc-monitor uses the uve status if the query
is succeed to the contrail-analytics. Otherwise it is
better to continue with last known state of agents and vrouters

Change-Id: I3b4c896a8834f5fef71ff4262dc09dc62cee36bc
Closes-bug: #1696593

[Yuvaraja Mariappan (ymariappan)]

https://review.opencontrail.org/#/c/29611/ will take care it for 4.0 and Trunk.

Thanks,
Yuvaraja

[OpenContrail Admin (ci-admin-f)]

Reviewed: https://review.opencontrail.org/32684
Committed: http://github.com/Juniper/contrail-controller/commit/adf5c2ebb8f2c693e85536ae03924192abe49faf
Submitter: Zuul (<email address hidden>)
Branch: R3.2.3.x

commit adf5c2ebb8f2c693e85536ae03924192abe49faf
Author: Yuvaraja Mariappan <email address hidden>
Date: Thu Jun 8 12:24:57 2017 -0700

Fixed contrail-analytics unavailablity issue

contrail-svc-monitor uses the uve status if the query
is succeed to the contrail-analytics. Otherwise it is
better to continue with last known state of agents and vrouters

Change-Id: I3b4c896a8834f5fef71ff4262dc09dc62cee36bc
Closes-bug: #1696593