Merge "Add Ussuri priorities"

priorities/ussuri-priorities.rst

@@ -6,7 +6,70 @@ Ussuri Project Priorities
 
 List of priorities the Watcher drivers team is prioritizing in Ussuri.
 
-+--------------------------------------+----------------------+
++------------------------------------------------+------------------------+
-| Priority                             | Owner                |
+| Priority                                       | Owner                  |
-+======================================+======================+
++================================================+========================+
-+--------------------------------------+----------------------+
+| `General purpose decision engine threadpool`_  | `Corne Lukken`_        |
++------------------------------------------------+------------------------+
+| `Kubernetes helm charts and docker images`_    | `Corne Lukken`_        |
++------------------------------------------------+------------------------+
+| `Rollback Mechanism`_                          | `su zhengwei`_         |
++------------------------------------------------+------------------------+
+| `Provide scenario jobs for each strategy`_     | `Li Canwei`_           |
++------------------------------------------------+------------------------+
+| `Event-driven optimization based`_             | `Li Canwei`_           |
++------------------------------------------------+------------------------+
+| `the community-wide goals`_                    |  TBD                   |
++------------------------------------------------+------------------------+
+
+
+.. _Corne Lukken: https://launchpad.net/~dantalion
+.. _Li Canwei: https://launchpad.net/~li-canwei2
+.. _su zhengwei: https://launchpad.net/~sue.sam
+
+
+General purpose decision engine threadpool
+------------------------------------------
+Watcher spends a large portion of time waiting for I/O operations such as
+writing to disc or waiting for responses to network requests. The time it
+takes to perform such operations can typically be reduced significantly
+by implementing parallelism. The general purpose threadpool for the decision
+engine will allow arbitrary methods to be executed in parallel.
+The amount of workers in the threadpool should be user configurable.
+
+Kubernetes helm charts and docker images
+----------------------------------------
+Blueprint to track all activities related to being able to deploy Watcher
+on K8s using helm charts. Also requires that the appropriate docker images
+are created and uploaded to a registry.
+
+Rollback Mechanism
+------------------
+After every audit, there would be one actionplan to execute.
+Sometimes, the users want to rollback the actionplan or part of the actionplan
+after one audit.
+For host maintenance, it will migrate all instances from the maintaining host
+to others. Aften the host maintenance and active again, there is no mechanism
+to migrate the instances automatically back to the maintaining host.
+
+Provide scenario jobs for each strategy
+---------------------------------------
+We have provided some tempest tests in Train release, and will continue to
+improve the scenario tests for strategies.
+
+Event-driven optimization based
+-------------------------------
+We propose an event-driven optimization-based audit control.
+We wants to select among a list of events which may trigger the audit :
+- React to a predicted situation.
+- React to a critical situations and changes in system (e.g: threshold)
+- A new compute node has been added to the cluster
+- A compute node has been removed from the cluster
+- A new virtual machine has been created
+
+The events can be created by AODH, congress, ceilometer,
+scoring engine (long term).
+
+the community-wide goals
+------------------------
+https://governance.openstack.org/tc/goals/ussuri/index.html