Backport of keyring: safely handle missing keys and restore GC into release/1.4.x #15100
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Backport
This PR is auto-generated from #15092 to be assessed for backporting due to the inclusion of the label backport/1.4.x.
The below text is copied from the body of the original PR.
Fixes #14981 #15088
When replication of a single key fails, the replication loop breaks early and therefore keys that fall later in the sorting order will never get replicated. This is particularly a problem for clusters impacted by the bug that caused #14981 and that were later upgraded; the keys that were never replicated can now never be replicated, and so we need to handle them safely.
Included in the replication fix:
But these fixes aren't enough to fix #14981 because they'll end up seeing an error once a second complaining about the missing key, so we also need to fix keyring GC so the keys can be removed from the state store. Now we'll store the key ID used to sign a workload identity in the Allocation, and we'll index the Allocation table on that so we can track whether any live Allocation was signed with a particular key ID.
(Best reviewed commit-by-commit.)