Sharding Group Members :

For sharding there are three players.

Config Server Setup : add the following to mongod conf file

sharding:
  clusterRole: configsvr
replication:
  replSetName: <setname>  

run : mongod --config

we can choose config server as replica set or may be a standalone server. Based on our requirement we can choose the best. If config need to run in replica set we need to follow the replica set setup

Replica Setup : Create replica set // Please refer the replica setup

MongoS Setup : Mongos is main setup in shard. Its is query router to access all replica sets

Add the following in mongos conf file

   sharding:
      configDB: <configReplSetName>/cfg1.example.net:27017;

Configure Shared :

Connect the mongos via shell (mongo --host --port )

1. sh.addShard( "/s1-mongo1.example.net:27017")
2. sh.enableSharding("")
3. sh.shardCollection("< database >.< collection >", { < key > : < direction > } )
4. sh.status() // To ensure the sharding