Currently, the patch does the following:
Kicks off workflow from stack.update_or_create:
Once the dependency graph is calculated, the leaves
of the graph are all casted into the RPC worker bus.
Worker RPC check_resource worfklow:
Workers will then start working on each resource
individually. Once a resource operation is finished,
sync points are used to check if the parent resource
can be worked on. Resources that finish early will
wait for their siblings to finish. The sibling that
finishes last will trigger the creation/updation/deletion
of it's parent. This process then goes on for all nodes
until the roots of the graph are processed.
Marks stack as complete when roots have finished.
Once the roots of the graph are successfully processed,
the previous raw template which was needed for rollback
in case something went wrong will now be deleted from the
database. The stack is then marked as complete.
Largely follows the convergence prototype code in
github.com/zaneb/heat-convergence-prototype/blob/resumable/converge/converger.py
Implements blueprint convergence-check-workflow
Change-Id: I67cfdc452ba406198c96afba57aa4e756408105d
RPC casts never return anything, only RPC calls do,
so remove the misleading return in the worker client.
Change-Id: I82e2ead0b350be42f808f6cb6b9b57b786aeadcf
Provides the convergence message bus for heat-engine.
Implements: blueprint convergence-message-bus
Change-Id: I19b9edc9f17c881b542926783c8918e536d12ec5
Sirushti Murugesan