a3030c51e2
This change adds the unfollow action for CCR follower indices. This is needed for the shrink action in case an index is a follower index. This will give the follower index the opportunity to fully catch up with the leader index, pause index following and unfollow the leader index. After this the shrink action can safely perform the ilm shrink. The unfollow action needs to be added to the hot phase and acts as barrier for going to the next phase (warm or delete phases), so that follower indices are being unfollowed properly before indices are expected to go in read-only mode. This allows the force merge action to execute its steps safely. The unfollow action has three steps: * `wait-for-indexing-complete` step: waits for the index in question to get the `index.lifecycle.indexing_complete` setting be set to `true` * `wait-for-follow-shard-tasks` step: waits for all the shard follow tasks for the index being handled to report that the leader shard global checkpoint is equal to the follower shard global checkpoint. * `pause-follower-index` step: Pauses index following, necessary to unfollow * `close-follower-index` step: Closes the index, necessary to unfollow * `unfollow-follower-index` step: Actually unfollows the index using the CCR Unfollow API * `open-follower-index` step: Reopens the index now that it is a normal index * `wait-for-yellow` step: Waits for primary shards to be allocated after reopening the index to ensure the index is ready for the next step In the case of the last two steps, if the index in being handled is a regular index then the steps acts as a no-op. Relates to #34648 Co-authored-by: Martijn van Groningen <martijn.v.groningen@gmail.com> Co-authored-by: Gordon Brown <gordon.brown@elastic.co> |
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| src/test/java/org/elasticsearch/xpack/indexlifecycle | ||
| build.gradle | ||