replSetGetConfig

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Definition

Compatibility
Syntax
Command Fields
Output Example

Definition

replSetGetConfig: Returns a document that describes the current configuration of the replica set.
Tip
In mongosh, this command can also be run through the rs.conf() helper method.
Helper methods are convenient for mongosh users, but they may not return the same level of information as database commands. In cases where the convenience is not needed or the additional return fields are required, use the database command.

Compatibility

This command is available in deployments hosted in the following environments:

MongoDB Atlas: The fully managed service for MongoDB deployments in the cloud

Important

This command is not supported in M0, M2, and M5 clusters. For more information, see Unsupported Commands.

MongoDB Enterprise: The subscription-based, self-managed version of MongoDB
MongoDB Community: The source-available, free-to-use, and self-managed version of MongoDB

Syntax

To run, replSetGetConfig must be issued against the admin database. The command has the following syntax:

db.adminCommand(
   {
     replSetGetConfig: 1,
     commitmentStatus: <boolean>,
     comment: <any>
   }
)

Command Fields

Field	Type	Description
`replSetGetConfig`	any	Any value
commitmentStatus	boolean	Optional. Specify `true` to include a commitmentStatus field in the output. The commitmentStatus output field indicates whether the replica set's previous reconfig has been committed, so that the replica set is ready to be reconfigured again. For details, see commitmentStatus Output Field. You can only specify `commitmentStatus: true` option when running the command on the primary. The command errors if run with `commitmentStatus: true` on a secondary.
`comment`	any	Optional. A user-provided comment to attach to this command. Once set, this comment appears alongside records of this command in the following locations: mongod log messages, in the `attr.command.cursor.comment` field. Database profiler output, in the `command.comment` field. `currentOp` output, in the `command.comment` field. A comment can be any valid BSON type (string, integer, object, array, etc).

mongosh provides the rs.conf() method that wraps the replSetGetConfig command:

rs.conf();

Output Example

The following is an example output of the replSetGetConfig command run with commitmentStatus: true on the primary:

{
   "config" : {
      "_id" : "myRepl",
      "version" : 180294,
      "term" : 1,
      "protocolVersion" : NumberLong(1),
      "writeConcernMajorityJournalDefault" : true,
      "members" : [
         {
            "_id" : 0,
            "host" : "m1.example.net:27017",
            "arbiterOnly" : false,
            "buildIndexes" : true,
            "hidden" : false,
            "priority" : 1,
            "tags" : {
            },
            "secondaryDelaySecs" : NumberLong(0),
            "votes" : 1
         },
         {
            "_id" : 1,
            "host" : "m2.example.net:27017",
            "arbiterOnly" : false,
            "buildIndexes" : true,
            "hidden" : false,
            "priority" : 1,
            "tags" : {
            },
            "secondaryDelaySecs" : NumberLong(0),
            "votes" : 1
         },
         {
            "_id" : 2,
            "host" : "m3.example.net:27017",
            "arbiterOnly" : false,
            "buildIndexes" : true,
            "hidden" : false,
            "priority" : 1,
            "tags" : {
            },
            "secondaryDelaySecs" : NumberLong(0),
            "votes" : 1
         }
      ],
      "settings" : {
         "chainingAllowed" : true,
         "heartbeatIntervalMillis" : 2000,
         "heartbeatTimeoutSecs" : 10,
         "electionTimeoutMillis" : 10000,
         "catchUpTimeoutMillis" : -1,
         "catchUpTakeoverDelayMillis" : 30000,
         "getLastErrorModes" : {
         },
         "getLastErrorDefaults" : {
            "w" : 1,
            "wtimeout" : 0
         },
         "replicaSetId" : ObjectId("5eaa1e9ac4d650aa7817623d")
      }
   },
   "commitmentStatus" : true,
   "ok" : 1,
   "$clusterTime" : {
      "clusterTime" : Timestamp(1588212091, 1),
      "signature" : {
         "hash" : BinData(0,"veOHa2mOeRTzuR0LKqnzGxWV77k="),
         "keyId" : NumberLong("6821298283919441923")
      }
   },
   "operationTime" : Timestamp(1588212091, 1)
}

Field	Description
`config`	The replica set configuration. For description of each configuration settings, see Self-Managed Replica Set Configuration.
commitmentStatus	A boolean that indicates whether the most recent replica set configuration has been committed; i.e. The most recent replica set configuration for the primary has propagated to a majority of members, and The last write operation to the replica set with the previous configuration has been `majority-commited` in the new configuration. If `true`, then the configuration has been committed, and the replica set can be reconfigured. To reconfigure the replica set, see `replSetReconfig` command or the `mongosh` method `rs.reconfig()`. If `false`, then the configuration has not been committed, and the replica set cannot be reconfigured.
`ok`	A number that indicates whether the command has succeeded (`1`) or failed (`0`).
`operationTime` `$clusterTime`	Returned with every command for a replica set. See db.adminCommand Response for details.