Return Alternate Hosts
Sometimes when a request to build a VM is attempted, the build can fail for a variety of different reasons. At the Atlanta PTG we discussed a request from operators have the scheduler return some alternate hosts along with the selected host. This was desired because in the event of a failed build, another host could be tried without having to go through the entire scheduling process again.
Blueprint information
- Status:
- Complete
- Approver:
- Matt Riedemann
- Priority:
- High
- Drafter:
- Ed Leafe
- Direction:
- Approved
- Assignee:
- Ed Leafe
- Definition:
- Approved
- Series goal:
- Accepted for queens
- Implementation:
-
Implemented
- Milestone target:
-
queens-rc1
- Started by
- Matt Riedemann
- Completed by
- Matt Riedemann
Related branches
Related bugs
Sprints
Whiteboard
Gerrit topic: https:/
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Return Alternate Hosts
Gerrit topic: https:/
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Set the Pike release version for scheduler RPC
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Add alternate hosts
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Add Selection objects
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Return Selection objects from the scheduler driver
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Change RPC for select_
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Move the claim_resources method to scheduler utils
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WIP - Make conductor pass and use host_lists
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Trivial: fix spelling of allocation_request
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Only filter/weigh hosts once if scheduling a single instance
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Change RPC for select_
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Fix return type in FilterScheduler
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Refactor the code to check for sufficient hosts
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Move the to_dict() method to the Selection object
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Change compute RPC to use alternates for resize
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Don't try to delete build request during a reschedule
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Don't try to delete build request during a reschedule
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Don't try to delete build request during a reschedule
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Add functional test for resize reschedules
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Add regression test for resizing failing during retries
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Add unit test for non-placement resize
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WIP: Deprecate RetryFilter
Work Items
Dependency tree
* Blueprints in grey have been implemented.
