Sharding in Action - MongoDB High Availability - page 105

Adding shards to mongos
After connecting to the mongos instance, you can add shards to sharding. Basically, you
can add two types of endpoints to the mongos as a shard; a replica set or a standalone
mongod instance.
MongoDB has a sh namespace and a function called addShard(), which is used to add
a new shard to an existing sharding network. Here is the example of a command to add a
new shard. This is shown in the following screenshot:
To add a replica set to mongos you should follow this scheme:
setname/server:port
For instance, if you have a replica set with the name of rs1 , hostname mon-
god1.replicaset.com , and port number 27017 , the command will be as follows:
sh.addShard("rs1/mongod1.replicaset.com:27017")
Using the same function, we can add standalone mongod instances. So, if we have a mon-
god instance with the hostname mongod1.sharding.com listening on port 27017 ,
the command will be as follows:
sh.addShard("mongod1.sharding.com:27017")
Note
You can use a secondary or primary hostname to add the replica set as a shard to the shard-
ing network. MongoDB will detect the primary and use the primary node to interact with
sharding.
Now, we add the replica set network that we made in the previous chapters to sharding us-
ing the following command:
sh.addShard("rs1/mongod1.replicaset.com:27017")