För att ansluta till en replikuppsättning Primär använd mongoskalet --host alternativ:
mongo --host replicaSetName/host1[:porthost1],host2[:porthost1],host3[:porthost3],etc
Till exempel:
$ mongo --host rs1/john.local:27019,john.local:27018
MongoDB shell version: v3.4.9
connecting to: mongodb://john.local:27019,john.local:27018/?replicaSet=rs1
2017-10-12T14:13:03.094+0000 I NETWORK [thread1] Starting new replica set monitor for rs1/john.local:27019,john.local:27018
2017-10-12T14:13:03.096+0000 I NETWORK [thread1] Successfully connected to john.local:27019 (1 connections now open to john.local:27019 with a 5 second timeout)
2017-10-12T14:13:03.096+0000 I NETWORK [thread1] Successfully connected to john.local:27018 (1 connections now open to john.local:27018 with a 5 second timeout)
rs1:PRIMARY> db
test
rs1:PRIMARY>
Obs! Från version 3.4.2 till 3.4.10 fanns det en bugg (SERVER-28072) som förhindrade att specificera db efter när --host eller --port användes.