[Backport 2.x] Initial commit to support a search only replica for RW separation #15535
Commits on Aug 30, 2024
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Initial commit to support a search only replica for RW separation. (o…
…pensearch-project#15410) * Initial commit for search only replica. This PR contains the following: 1. Introduce searchOnly flag on ShardRouting. 2. Added feature flag to enable/disable the feature. 3. supports both create and update APIs to toggle search replica count. 4. Changes to exclude search replicas from primary eligibility. 5. Changes to prevent replicationOperations from routing to search replicas. Signed-off-by: Marc Handalian <[email protected]> * add some missing feature flag checks Signed-off-by: Marc Handalian <[email protected]> * Pr feedback from @andrross Signed-off-by: Marc Handalian <[email protected]> * Add more unit tests for settings create and update Signed-off-by: Marc Handalian <[email protected]> * Fix broken tests from setting rename Signed-off-by: Marc Handalian <[email protected]> * Fix broken tests and add changelog entry Signed-off-by: Marc Handalian <[email protected]> * More PR feedback. Signed-off-by: Marc Handalian <[email protected]> * add missing searchOnly property to initializeTargetRelocatingShard. Without this search replicas will become regular replicas on relocation. Signed-off-by: Marc Handalian <[email protected]> * test fixes Signed-off-by: Marc Handalian <[email protected]> * spotless Signed-off-by: Marc Handalian <[email protected]> --------- Signed-off-by: Marc Handalian <[email protected]> (cherry picked from commit 1e9fdb4) Signed-off-by: Marc Handalian <[email protected]>
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Update wire compatibility version to 2_17_0
Signed-off-by: Marc Handalian <[email protected]>
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change assertion for ff disabled from SettingsException to IllegalArg…
…umentException Signed-off-by: Marc Handalian <[email protected]>
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