Adding a node to the replica set

In this recipe, we will be looking at how to add a node to an existing replica set.

Getting ready

Ensure that you have a single node replica set running as mentioned in the first recipe of this chapter.

How to do it...

1. Assuming you have the node from the previous recipe already running, open a new Terminal and start a new replica set node:

mongod --dbpath /data/server2/db --replSet MyReplicaSet --port 27018

2. In another Terminal window, connect to the primary server using mongo shell (replace the IP with that of your server's):

mongo mongodb://192.168.200.200:27017

3. Check the number of members in the replica set:

rs.status()['members']
 [
 {
 "_id" : 0,
 "name" : "vagrant-ubuntu-trusty-64:27017",
 "health" : 1,
 "state" : 1,
 "stateStr" : "PRIMARY",
 "uptime" : 36,
 "optime" : {
 "ts" : Timestamp(1503664489, 1),
 "t" : NumberLong(3)
 },
 "optimeDate" : ISODate("2017-08-25T12:34:49Z"),
 "infoMessage" : "could not find member to sync from",
 "electionTime" : Timestamp...