rs0:SECONDARY> db.adminCommand({isMaster: 1})
{
	"hosts" : [
		"10.8.0.24:27017",
		"10.8.6.11:27017",
		"10.8.4.15:27017"
	],
	"setName" : "rs0",
	"setVersion" : 507911,
	"ismaster" : false,
	"secondary" : true,
	"primary" : "10.8.0.24:27017",
	"me" : "10.8.4.15:27017",
	"lastWrite" : {
		"opTime" : {
			"ts" : Timestamp(1584117812, 3),
			"t" : NumberLong(7)
		},
		"lastWriteDate" : ISODate("2020-03-13T16:43:32Z"),
		"majorityOpTime" : {
			"ts" : Timestamp(1584117812, 3),
			"t" : NumberLong(7)
		},
		"majorityWriteDate" : ISODate("2020-03-13T16:43:32Z")
	},
	"maxBsonObjectSize" : 16777216,
	"maxMessageSizeBytes" : 48000000,
	"maxWriteBatchSize" : 100000,
	"localTime" : ISODate("2020-03-13T16:43:44.145Z"),
	"logicalSessionTimeoutMinutes" : 30,
	"connectionId" : 129106,
	"minWireVersion" : 0,
	"maxWireVersion" : 8,
	"readOnly" : false,
	"ok" : 1,
	"$clusterTime" : {
		"clusterTime" : Timestamp(1584117812, 3),
		"signature" : {
			"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
			"keyId" : NumberLong(0)
		}
	},
	"operationTime" : Timestamp(1584117812, 3)
}