[openstack-dev] [Gantt] New scheduler tree not up

Dugger, Donald D donald.d.dugger at intel.com
Mon Jan 6 20:55:33 UTC 2014

This is to let everyone know that we have created a new source tree, `https://github.com/openstack/gantt.git', that contains the code for the Nova scheduler.  The ultimate goal is to create a separate scheduler service that can be utilized by any part of OpenStack that needs a scheduling capability but we're going to start out just by moving the current scheduler into a separate tree.

Note that right now the new tree is not a new scheduler, it is just the current Nova scheduler code that has been moved to a new tree.  Any changes we want to make to the Nova scheduler should still happen inside the Nova tree.

There are a few tasks that need to be completed before the new tree can be utilized by Nova:

1)      Get the tests working in the Gantt tree.  Currently, we've make the tests non-voting as none of the tests work yet, fixing this is clearly a critical task.

2)      Do the plumbing such that Nova makes its scheduler calls into the new Gantt tree.  Given that the Gantt tree is a duplicate of the nova code this should be a fairly safe change but there is clearly work that needs to be done here.

3)      Get the documentation working in the Gantt tree, that's currently broken.

4)      Start working on creating Gantt as separately running, callable service (expect some lively sessions at the next summit, new RESTful APIs are probably needed at a minimum).

Note that until we've completed task 2 there will be 2 separate scheduler source trees, the one in Nova and the one in Gantt.  Scheduler development should not change for now, all scheduler changes should be applied to the Nova tree.  I'll be monitoring the Nova tree and will port over any scheduler changes into the Gantt tree.  (Hopefully we will complete task 2 before I go crazy doing that.)

Don Dugger
"Censeo Toto nos in Kansa esse decisse." - D. Gale
Ph: 303/443-3786

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