Mistral Server components HA & Scalability

Registered by Renat Akhmerov

We need that all Mistral components (specially engine and executor) are highly available and scalable so that we could run several processes and they can:
* Execute multiple workflow tasks in parallel
* Correct work with Rabbit Queue and take tasks from it after stopping (executors)

Blueprint information

Status:
Complete
Approver:
Renat Akhmerov
Priority:
High
Drafter:
None
Direction:
Approved
Assignee:
Anastasia Kuznetsova
Definition:
Approved
Series goal:
Accepted for juno
Implementation:
Implemented
Milestone target:
milestone icon 2015.1
Started by
Renat Akhmerov
Completed by
Renat Akhmerov

Related branches

Sprints

Whiteboard

Gerrit topic: https://review.openstack.org/#q,topic:bp/mistral-poc,n,z

Addressed by: https://review.openstack.org/61700
    Implementing scalable Mistral Engine

Relevant test work was done: I've tested the Mistral work with few engines and few executors. All engines and executors worked as they were design. Tasks were paralleled and executed on different executors.Engines also divided there work.

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Work Items

Dependency tree

* Blueprints in grey have been implemented.

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