rs.status()

rs0:PRIMARY> rs.status()
{
	"set" : "rs0",
	"date" : ISODate("2017-01-13T14:34:14.190Z"),
	"myState" : 1,
	"members" : [
		{
			"_id" : 0,
			"name" : "primary_hostname:27017",
			"health" : 1,
			"state" : 1,
			"stateStr" : "PRIMARY",
			"uptime" : 84799,
			"optime" : Timestamp(1484309110, 5),
			"optimeDate" : ISODate("2017-01-13T12:05:10Z"),
			"electionTime" : Timestamp(1484233282, 2),
			"electionDate" : ISODate("2017-01-12T15:01:22Z"),
			"configVersion" : 3,
			"self" : true
		},
		{
			"_id" : 1,
			"name" : "arbiter_hostname:27017",
			"health" : 1,
			"state" : 0,
			"stateStr" : "STARTUP",
			"uptime" : 84712,
			"lastHeartbeat" : ISODate("2017-01-13T14:34:13.736Z"),
			"lastHeartbeatRecv" : ISODate("1970-01-01T00:00:00Z"),
			"pingMs" : 0,
			"configVersion" : -2
		},
		{
			"_id" : 2,
			"name" : "secondary_hostname:27017",
			"health" : 1,
			"state" : 0,
			"stateStr" : "STARTUP",
			"uptime" : 84611,
			"optime" : Timestamp(0, 0),
			"optimeDate" : ISODate("1970-01-01T00:00:00Z"),
			"lastHeartbeat" : ISODate("2017-01-13T14:34:13.760Z"),
			"lastHeartbeatRecv" : ISODate("1970-01-01T00:00:00Z"),
			"pingMs" : 1,
			"configVersion" : -2
		}
	],
	"ok" : 1
}

rs0:PRIMARY> rs.config()
{
	"_id" : "rs0",
	"version" : 3,
	"members" : [
		{
			"_id" : 0,
			"host" : "primary_hostname:27017",
			"arbiterOnly" : false,
			"buildIndexes" : true,
			"hidden" : false,
			"priority" : 1,
			"tags" : {
				
			},
			"slaveDelay" : 0,
			"votes" : 1
		},
		{
			"_id" : 1,
			"host" : "arbiter_hostname:27017",
			"arbiterOnly" : true,
			"buildIndexes" : true,
			"hidden" : false,
			"priority" : 1,
			"tags" : {
				
			},
			"slaveDelay" : 0,
			"votes" : 1
		},
		{
			"_id" : 2,
			"host" : "secondary_hostname:27017",
			"arbiterOnly" : false,
			"buildIndexes" : true,
			"hidden" : false,
			"priority" : 0,
			"tags" : {
				
			},
			"slaveDelay" : 0,
			"votes" : 1
		}
	],
	"settings" : {
		"chainingAllowed" : true,
		"heartbeatTimeoutSecs" : 10,
		"getLastErrorModes" : {
			
		},
		"getLastErrorDefaults" : {
			"w" : 1,
			"wtimeout" : 0
		}
	}
}