If a load balancer loses more than one amphora at the same time
the failover process will fail and leave the load balancer in
provisioning status ERROR.
This patch resolves this by failing over one amphora at a time
marking any amphora that are also failed in status ERROR. The health
manager will then failover the other failed amphora in subsequent checks.
This patch will update multiple healthy amphora in parallel and will
timeout failed amphroa using the new "active_connection_max_retries"
configuration setting used for "fail-fast" connections.
The patch also updates the amphora failover flow documentation to
show the full flow and not just the spares failover flow.
It updates the amphora driver "get_diagnostics" method to pass instead
of error.
It also adds a AmphoraComputeConnectivityWait task to explicitly wait
for a compute instance to come up and be reachable. This allows a longer
timeout and clarifies this may fail due to compute (nova) failures.
Previously the first plug vip task would do this wait.
Change-Id: Ief97ddda8261b5bbc54c6824f90ae9c7a2d81701
Story: 2001481
Task: 6202
If a failover ran on an amphora and was unsuccessful and reverted, it
would mark the amp status "DELETED" and un-busy the health record.
It would then be picked up on the next failover check, start failing
over, and break early since it appeared to be "unallocated".
Also, housekeeping can now clean up expired amphora records based on the
amphora's updated_at time instead of the health record's time, which
means the records won't be immediately cleaned up anymore after they go
through failover flows.
Change-Id: I848b7fc69b977fcb39f8a07e2ea5fc7bd37b5c7a
Also fix an incorrect exposure of /healthmonitors on /pools and a badly
ordered flow for member updates.
Change-Id: Id256ea94293519b75983f7a44945ac9bbbf25cd1
Implements: blueprint member-put-list
This patch updates the Octavia documentation in support of the
OpenStack documentation migration[1].
[1] https://specs.openstack.org/openstack/docs-specs/specs \
/pike/os-manuals-migration.html
Change-Id: I97fd038b8050bfe776c3fca8336d9090f8236362
Depends-On: Ia750cb049c0f53a234ea70ce1f2bbbb7a2aa9454
The spare pool failover patch changed the logic of the failover flow
and cause the flow diagram generation to only render part of the flow.
This patch updates the diagram generation to show the whole failover
flow.
Change-Id: I8dc49f0ca74054869ec42fee4236533acb24eb3a
Octavia extensively uses TaskFlow flows for orchestration.
To make it easier for developers to understand these flows,
this patch adds a mechanism for generating graphviz representations
of the key Octavia TaskFlow flows.
It also updates our tox docs task to generate this documentation.
This patch depends on a fix to the TaskFlow export_to_dot method.
Added into conf.py as first step of configuration
Closes-Bug: #1561063
Change-Id: I914e1c062b400148565def37ccf618b3d2ea2573
Depends-On: I99f87af0b2bed959fcb43ef611b3186e23bd9549
