DOCS-2489 clarify that removeShard is run on admin db

source/reference/command/removeShard.txt

@@ -6,44 +6,71 @@ removeShard
 
 .. dbcommand:: removeShard
 
-   Starts the process of removing a shard from a :term:`cluster
-   <sharded cluster>`. This
-   is a multi-stage process. Begin by issuing the following command:
+   Removes a shard from a :term:`sharded cluster`. When you run
+   :dbcommand:`removeShard`, MongoDB first moves the shard's chunks to
+   other shards in the cluster. Then MongoDB removes the shard.
+
+   To run the command you must have administrative access. Either run
+   :dbcommand:`removeShard` from the admin database or run it with the
+   :method:`sh._adminCommand` command.
+
+   The command takes the following form:
 
    .. code-block:: javascript
 
-      { removeShard : "[shardName]" }
+      use admin
+      db.runCommand( { removeShard : "<shardName>" } )
 
-   The balancer will then migrate chunks from the shard specified by
-   ``[shardName]``. This process happens slowly to avoid placing
-   undue load on the overall cluster.
+Behavior
+--------
 
-   The command returns immediately, with the following message:
+When you run :dbcommand:`removeShard`, the command returns immediately,
+with the following message:
 
-   .. code-block:: javascript
+.. code-block:: javascript
 
-      { msg : "draining started successfully" , state: "started" , shard: "shardName" , ok : 1 }
+   {
+       "msg" : "draining started successfully",
+       "state" : "started",
+       "shard" : "bristol01",
+       "ok" : 1
+   }
 
-   If you run the command again, you'll see the following progress
-   output:
+The balancer migrates chunks from shard ``bristol01``.
+This process happens slowly to avoid placing undue load on the overall
+cluster.
 
-   .. code-block:: javascript
+If you run the command again, you'll see the following progress output:
 
-      { msg: "draining ongoing" , state: "ongoing" , remaining: { chunks: 23 , dbs: 1 }, ok: 1 }
+.. code-block:: javascript
 
-   The ``remaining`` :term:`document` specifies how many chunks and
-   databases remain on the shard. Use :method:`db.printShardingStatus()`
-   to list the databases that you must move from the shard.
+   {
+       "msg" : "draining ongoing",
+       "state" : "ongoing",
+       "remaining" : {
+           "chunks" : 23,
+           "dbs" : 1
+       },
+       "ok" : 1
+   }
 
-   Each database in a sharded cluster has a primary shard. If the
-   shard you want to remove is also the primary of one of the cluster's
-   databases, then you must manually move the database to a new
-   shard. This can be only after the shard is empty. See the
-   :dbcommand:`movePrimary` command for details.
+The ``remaining`` :term:`document` specifies how many chunks and databases
+remain on the shard. Use :method:`db.printShardingStatus()` to list the
+databases that you must move from the shard.
 
-   After removing all chunks and databases from the shard, you
-   may issue the command again, to return:
+Each database in a sharded cluster has a primary shard. If the shard you
+want to remove is also the primary of one of the cluster's databases, then
+you must manually move the database to a new shard. This can be done only
+after the shard is empty. See the :dbcommand:`movePrimary` command for details.
 
-   .. code-block:: javascript
+After removing all chunks and databases from the shard, if you issue the
+command again it returns:
+
+.. code-block:: javascript
 
-      { msg: "remove shard completed successfully", state: "completed", host: "shardName", ok : 1 }
+   {
+       "msg" : "removeshard completed successfully",
+       "state" : "completed",
+       "shard" : "bristol01",
+       "ok" : 1
+   }

source/tutorial/remove-shards-from-cluster.txt

@@ -60,19 +60,26 @@ The ``shards._id`` field lists the name of each shard.
 Remove Chunks from the Shard
 ----------------------------
 
-Run the :dbcommand:`removeShard` command. This begins "draining" chunks
+From the ``admin`` database, run the :dbcommand:`removeShard` command.
+This begins "draining" chunks
 from the shard you are removing to other shards in the cluster. For
 example, for a shard named ``mongodb0``, run:
 
 .. code-block:: javascript
 
+   use admin
    db.runCommand( { removeShard: "mongodb0" } )
 
 This operation returns immediately, with the following response:
 
 .. code-block:: javascript
 
-   { msg : "draining started successfully" , state: "started" , shard :"mongodb0" , ok : 1 }
+   {
+       "msg" : "draining started successfully",
+       "state" : "started",
+       "shard" : "mongodb0",
+       "ok" : 1
+   }
 
 Depending on your network capacity and the amount of data, this
 operation can take from a few minutes to several days to complete.
@@ -83,24 +90,36 @@ Check the Status of the Migration
 ---------------------------------
 
 To check the progress of the migration at any stage in the process, run
-:dbcommand:`removeShard`. For example, for a shard named ``mongodb0``, run:
+:dbcommand:`removeShard` from the ``admin`` database again. For example,
+for a shard named ``mongodb0``, run:
 
 .. code-block:: javascript
 
+   use admin
    db.runCommand( { removeShard: "mongodb0" } )
 
 The command returns output similar to the following:
 
 .. code-block:: javascript
 
-   { msg: "draining ongoing" , state: "ongoing" , remaining: { chunks: NumberLong(42), dbs : NumberLong(1) }, ok: 1 }
+   {
+        "msg" : "draining ongoing",
+       "state" : "ongoing",
+       "remaining" : {
+           "chunks" : 42,
+           "dbs" : 1
+       },
+       "ok" : 1
+   }
 
 In the output, the ``remaining`` document displays the remaining number
 of chunks that MongoDB must migrate to other shards and the number of
 MongoDB databases that have "primary" status on this shard.
 
 Continue checking the status of the `removeShard` command until the
-number of chunks remaining is ``0``. Then proceed to the next step.
+number of chunks remaining is ``0``. Always run the command on the
+``admin`` database. If you are on a database other than ``admin``, you can
+use :method:`sh._adminCommand` to run the command on ``admin``.
 
 .. _remove-shard-move-unsharded-databases:
 
@@ -165,13 +184,19 @@ To clean up all metadata information and finalize the removal, run
 
 .. code-block:: javascript
 
+   use admin
    db.runCommand( { removeShard: "mongodb0" } )
 
 A success message appears at completion:
 
 .. code-block:: javascript
 
-   { msg: "remove shard completed successfully" , state: "completed", host: "mongodb0", ok : 1 }
+   {
+       "msg" : "removeshard completed successfully",
+       "state" : "completed",
+       "shard" : "mongodb0",
+       "ok" : 1
+   }
 
-Once the value of the ``stage`` field is "completed", you may safely
+Once the value of the ``state`` field is "completed", you may safely
 stop the processes comprising the ``mongodb0`` shard.