Updated 2.18 to RC2. (#643)

* Updated 2.18 to RC2.

Signed-off-by: dblock <[email protected]>

.github/workflows/test-spec.yml

@@ -44,7 +44,7 @@ jobs:
             tests: plugins/query_insights
           - version: 2.18.0
             hub: opensearchstaging
-            ref: '@sha256:4445e195c53992038891519dc3be0d273cdaad1b047943d68921168ed243e7e9'
+            ref: '@sha256:57a1cd1142d68c203e2e4aa0666d9a691e1e409a5d14aa4a8f5044036f05cf06'
           - version: 3.0.0
             hub: opensearchstaging
             ref: '@sha256:727643acdfebed77bfdb26362dbcff536b7ea02a0cc4ae2da2521729171333de'

CHANGELOG.md

@@ -105,6 +105,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 - Added a release workflow triggered on a tag ([#635](https://github.com/opensearch-project/opensearch-api-specification/pull/635))
 - Added API spec for query insights plugin ([#625](https://github.com/opensearch-project/opensearch-api-specification/pull/625))
 - Added API spec for `adjust_pure_negative` for bool queries ([#641](https://github.com/opensearch-project/opensearch-api-specification/pull/641))
+- Added `remote_store` to node `Stats` ([#643](https://github.com/opensearch-project/opensearch-api-specification/pull/643))
 
 ### Changed
 

spec/schemas/nodes._common.yaml

@@ -276,12 +276,20 @@ components:
           $ref: '#/components/schemas/ShardSearchPipelineStats'
         segment_replication_backpressure:
           $ref: '#/components/schemas/ShardSegmentReplicationBackpressureStats'
+        remote_store:
+          $ref: '#/components/schemas/RemoteStoreStats'
         repositories:
           $ref: '#/components/schemas/ShardRepositoriesStats'
         admission_control:
           $ref: '#/components/schemas/ShardAdmissionControlStats'
         caches:
           $ref: '#/components/schemas/ShardCachesStats'
+    RemoteStoreStats:
+      type: object
+      properties:
+        last_successful_fetch_of_pinned_timestamps:
+          description: Timestamp for the last successful fetch of pinned timestamps.
+          $ref: '_common.yaml#/components/schemas/StringifiedEpochTimeUnitSeconds'
     ShardClusterManagerThrottlingStats:
       type: object
       properties: