[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 <marc.handalian@gmail.com> * add some missing feature flag checks Signed-off-by: Marc Handalian <marc.handalian@gmail.com> * Pr feedback from @andrross Signed-off-by: Marc Handalian <marc.handalian@gmail.com> * Add more unit tests for settings create and update Signed-off-by: Marc Handalian <marc.handalian@gmail.com> * Fix broken tests from setting rename Signed-off-by: Marc Handalian <marc.handalian@gmail.com> * Fix broken tests and add changelog entry Signed-off-by: Marc Handalian <marc.handalian@gmail.com> * More PR feedback. Signed-off-by: Marc Handalian <marc.handalian@gmail.com> * add missing searchOnly property to initializeTargetRelocatingShard. Without this search replicas will become regular replicas on relocation. Signed-off-by: Marc Handalian <marc.handalian@gmail.com> * test fixes Signed-off-by: Marc Handalian <marc.handalian@gmail.com> * spotless Signed-off-by: Marc Handalian <marc.handalian@gmail.com> --------- Signed-off-by: Marc Handalian <marc.handalian@gmail.com> (cherry picked from commit 1e9fdb4) Signed-off-by: Marc Handalian <marc.handalian@gmail.com>
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Update wire compatibility version to 2_17_0
Signed-off-by: Marc Handalian <marc.handalian@gmail.com>
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change assertion for ff disabled from SettingsException to IllegalArg…
…umentException Signed-off-by: Marc Handalian <marc.handalian@gmail.com>
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