DOCS-13871 Add REPL output to serverStatus command

Author: ianf-mongodb

source/reference/command/serverStatus.txt

@@ -2391,6 +2391,12 @@ repl
       "primary" : <hostname>,
       "me" : <hostname>,
       "electionId" : ObjectId(""),
+      "primaryOnlyServices": {
+         "ReshardingRecipientService": { "state": <string>, "numInstances": <num> },
+         "RenameCollectionParticipantService": { "state": <string>, "numInstances": <num> },
+         "ShardingDDLCoordinator": { "state": <string>, "numInstances": <num> },
+         "ReshardingDonorService": { "state": <string>, "numInstances": <num> }
+      },
       "rbid" : <num>,
       "replicationProgress" : [
             {
@@ -2441,6 +2447,76 @@ repl
     The hostname and port information (``"host:port"``) for the current
     member of the replica set.
 
+.. serverstatus:: repl.primaryOnlyServices
+
+   Document that contains the number and status of 
+   instances of each primary service active on the server. Primary 
+   services can only start when a server is primary but can continue running to 
+   completion after the server changes state.
+   
+   .. versionadded:: 5.0
+
+.. serverstatus:: repl.primaryOnlyServices.ReshardingRecipientService
+
+   Document that contains the state and number of instances of the
+   ``ReshardingRecipientService``.
+
+   Recipients are the shards,that would own the chunks after as a 
+   result of the resharding operation, according to the new 
+   :manual:`shard key</core/sharding-shard-key/>` and 
+   :manual:`zones</core/zone-sharding/>`.
+
+   The resharding coordinator instructs each donor and recipient shard 
+   primary, to rename the temporary sharded collection.
+   The temporary collection becomes the new resharded collection.
+
+   .. versionadded:: 5.0
+
+.. serverstatus:: repl.primaryOnlyServices.RenameCollectionParticipantService
+
+   Document that contains the state and number of instances of the
+   ``RenameCollectionParticipantService``.
+
+   The ``RenameCollectionParticipantService`` ensures that, after a shard 
+   receives a 
+   :manual:`renameCollection</reference/method/db.collection.renameCollection/>`
+   request, the shard is able to resume the local rename in case of 
+   system failure.
+
+   .. versionadded:: 5.0
+
+.. serverstatus:: repl.primaryOnlyServices.ShardingDDLCoordinator
+
+   Document that contains the state and number of instances of the
+   ``ShardingDDLCoordinator``.
+
+   The ``ShardingDDLCoordinator`` service manages DDL operations for 
+   :manual:`primary</core/replica-set-members/#std-label-replica-set-primary-member>`
+   databases such as:
+   :manual:`create database</core/databases-and-collections/#create-a-database>`,
+   :manual:`drop database</reference/method/db.dropDatabase/>`,
+   :manual:`renameCollection</reference/method/db.collection.renameCollection>`. 
+   
+   The ``ShardingDDLCoordinator`` ensures that one DDL operation for
+   each database can happen at any one specific point in time within a 
+   sharded cluster. 
+
+   .. versionadded:: 5.0
+
+.. serverstatus:: repl.primaryOnlyServices.ReshardingDonorService
+
+   Document that contains the state and number of instances of the
+   ``ReshardingDonorService``.
+
+   Donors are the shards that own chunks of the sharded collection
+   before the rename operation completes.
+
+   The resharding coordinator instructs each donor and recipient shard 
+   primary, to rename the temporary sharded collection.
+   The temporary collection becomes the new resharded collection.
+
+   .. versionadded:: 5.0
+
 .. serverstatus:: repl.rbid
 
    :term:`Rollback <rollback>` identifier. Used to determine if a rollback has

source/release-notes/5.0.txt

@@ -895,6 +895,13 @@ Security Counter
     which reports the number of times a :dbcommand:`hello` request
     includes a valid :data:`hello.saslSupportedMechs` field.
 
+Repl
+  - :serverstatus:`repl` now includes a
+    :ref:`primaryOnlyServices<server-status-repl>` document which
+    contains additional information about services that only run on 
+    replica set primaries.
+
+
 Plan Cache Debug Info Size Limit
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