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Starting the three config servers:

mongod -f csrs_1.conf

mongod -f csrs_2.conf

mongod -f csrs_3.conf

Connect to one of the config servers:

mongo --port 26001

Initiating the CSRS:

rs.initiate()

Creating super user on CSRS:

use admin
db.createUser({
  user: "m103-admin",
  pwd: "m103-pass",
  roles: [
    {role: "root", db: "admin"}
  ]
})

Authenticating as the super user:

db.auth("m103-admin", "m103-pass")

Add the second and third node to the CSRS:

rs.add("192.168.103.100:26002")
rs.add("192.168.103.100:26003")

Mongos config (mongos.conf):

sharding:
  configDB: m103-csrs/192.168.103.100:26001,192.168.103.100:26002,192.168.103.100:26003
security:
  keyFile: /var/mongodb/pki/m103-keyfile
net:
  bindIp: localhost,192.168.103.100
  port: 26000
systemLog:
  destination: file
  path: /var/mongodb/db/mongos.log
  logAppend: true
processManagement:
  fork: true

Connect to mongos:

vagrant@m103:~$ mongo --port 26000 --username m103-admin --password m103-pass --authenticationDatabase admin

Check sharding status:

MongoDB Enterprise mongos> sh.status()

Updated configuration for node1.conf:

sharding:
  clusterRole: shardsvr
storage:
  dbPath: /var/mongodb/db/node1
  wiredTiger:
    engineConfig:
      cacheSizeGB: .1
net:
  bindIp: 192.168.103.100,localhost
  port: 27011
security:
  keyFile: /var/mongodb/pki/m103-keyfile
systemLog:
  destination: file
  path: /var/mongodb/db/node1/mongod.log
  logAppend: true
processManagement:
  fork: true
replication:
  replSetName: m103-repl

Updated configuration for node2.conf:

sharding:
  clusterRole: shardsvr
storage:
  dbPath: /var/mongodb/db/node2
  wiredTiger:
    engineConfig:
      cacheSizeGB: .1
net:
  bindIp: 192.168.103.100,localhost
  port: 27012
security:
  keyFile: /var/mongodb/pki/m103-keyfile
systemLog:
  destination: file
  path: /var/mongodb/db/node2/mongod.log
  logAppend: true
processManagement:
  fork: true
replication:
  replSetName: m103-repl
Updated configuration for node3.conf:

sharding:
  clusterRole: shardsvr
storage:
  dbPath: /var/mongodb/db/node3
  wiredTiger:
    engineConfig:
      cacheSizeGB: .1
net:
  bindIp: 192.168.103.100,localhost
  port: 27013
security:
  keyFile: /var/mongodb/pki/m103-keyfile
systemLog:
  destination: file
  path: /var/mongodb/db/node3/mongod.log
  logAppend: true
processManagement:
  fork: true
replication:
  replSetName: m103-repl

Connecting directly to secondary node (note that if an election has taken place in your replica set, the specified node may have become primary):

mongo --port 27012 -u "m103-admin" -p "m103-pass" --authenticationDatabase "admin"

Shutting down node:

use admin
db.shutdownServer()

Restarting node with new configuration:

mongod -f node2.conf

Stepping down current primary:

rs.stepDown()

Adding new shard to cluster from mongos:

sh.addShard("m103-repl/192.168.103.100:27012")