heat/releasenotes/notes/manual-rollback-failed-replacement-08ebb9271617fe9d.yaml
Zane Bitter 97df8bb6ca Improve best existing resource selection
Rank all existing versions of a resource in a convergence stack to improve
the likelihood that we find the best one to update.

This allows us to roll back to the original version of a resource (or
even attempt an in-place update of it) when replacing it has failed.
Previously this only worked during automatic rollback; on subsequent
updates we would always work on the failed replacement (which inevitably
meant attempting another replacement in almost all cases).

Change-Id: Ia231fae85d1ddb9fc7b7de4e82cec0c0e0fd06b7
Story: #2003579
Task: 24881
2019-01-29 16:47:33 +13:00

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YAML

---
fixes:
- |
Heat can now perform a stack update to roll back to a previous version of a
resource after a previous attempt to create a replacement for it failed
(provided that convergence is enabled). This allows the user to recover a
stack where a resource has been inadvertantly replaced with a definition
than can never succeed because it conflicts with the original. Previously
this required automatic rollback to be enabled, or the user had to update
the stack with a non-conflicting definition before rolling back to the
original.