Connecting to a replica set

Connecting to a replica set is not fundamentally different from connecting to a single server. In this section, we will show some examples that use the official mongo-ruby-driver. We will use the following steps for the replica set:

1. First, we need to set our host and options objects as follows:

   client_host = ['hostname:port']
   client_options = {
   database: 'signals',
   replica_set: 'xmr_btc'
   }

In the preceding example, we are getting ready to connect to hostname:port in the database signals in replica_set xmr_btc.

2. Calling the initializer on Mongo::Client will now return a client object that contains a connection to our replica set and database, as follows:

   client = Mongo::Client.new(client_host, client_options)

The client object has the same options it has when connecting to a single server.

Note

MongoDB uses auto-discovery after connecting to our client_host to identify the other...