Add Transform associated indices #69493
Merged
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These somehow got dropped from the initial Feature States PR, so this
commit adds them again.
Note for reviewers: If you are not familiar with associated indices, they are new as of #63513. See this comment:
elasticsearch/server/src/main/java/org/elasticsearch/plugins/SystemIndexPlugin.java
Lines 43 to 48 in 4e429af
They are currently only used for ensuring all of a feature's indices are included in snapshots that specify they should include that feature's state - that is, if a plugin's system indices are included in a snapshot, that plugin's associated indices will be as well. They will also be used for the upcoming reset API (see #69469).