Update peering state and RPC for deferred deletion #13430
Merged
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Backport of ENT-2041
Description
When deleting a peering we do not want to delete the peering and all
imported data in a single operation, since deleting a large amount of
data at once could overload Consul.
Instead we defer deletion of peerings so that:
When a peering deletion request is received via gRPC the peering is
marked for deletion by setting the DeletedAt field.
A leader routine will monitor for peerings that are marked for
deletion and kick off a throttled deletion of all imported resources
before deleting the peering itself.
This PR mostly addresses point #1 by modifying the peering service
to mark peerings for deletion. Another key change is to add a
PeeringListDeleted state store function which can return all peerings
marked for deletion. This function is what will be watched by the
deferred deletion leader routine.
PR Checklist
external facing docs updated