[Backport 2.x] Initial commit to support a search only replica for RW separation #15535
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…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]>
Signed-off-by: Marc Handalian <[email protected]>
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❌ Gradle check result for 797443c: FAILURE Please examine the workflow log, locate, and copy-paste the failure(s) below, then iterate to green. Is the failure a flaky test unrelated to your change? |
…umentException Signed-off-by: Marc Handalian <[email protected]>
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Aug 30, 2024
This was referenced Sep 6, 2024
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Description
Manual backport of #15410 to 2.x line.
This backport resolves merge conflicts and includes one src change - the wire compatibility in ShardRouting is changed from 3_0_0 to 2_17_0. 2.x also does validation differently from main for update settings / create index, and throws IAE instead of a SettingsException, so updated test to reflect that.
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