Add API to execute SLM retention on-demand (#47405) #47463
Merged
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This is a backport of #47405
This commit adds the
/_slm/_execute_retentionAPI endpoint. Thisendpoint kicks off SLM retention and then returns immediately.
This in particular allows us to run retention without scheduling it
(for entirely manual invocation) or perform a one-off cleanup.
This commit also includes HLRC for the new API, and fixes an issue
in SLMSnapshotBlockingIntegTests where retention invoked prior to the
test completing could resurrect an index the internal test cluster
cleanup had already deleted.
Resolves #46508
Relates to #43663