mongo1
MongoDB server version: 3.4.9
Server has startup warnings:
2017-11-20T11:03:02.360+0000 I CONTROL  [initandlisten]
2017-11-20T11:03:02.360+0000 I CONTROL  [initandlisten] ** WARNING: Access control is not enabled for the database.
2017-11-20T11:03:02.360+0000 I CONTROL  [initandlisten] **          Read and write access to data and configuration is unrestricted.
2017-11-20T11:03:02.360+0000 I CONTROL  [initandlisten]
reptempo:PRIMARY> show databases;
admin    0.000GB
dbTempo  2.409GB
local    0.617GB
reptempo:PRIMARY>


mongo2
MongoDB shell version v3.4.9
connecting to: mongodb://127.0.0.1:27017
MongoDB server version: 3.4.9
Server has startup warnings:
2017-11-20T11:03:16.699+0000 I CONTROL  [initandlisten]
2017-11-20T11:03:16.699+0000 I CONTROL  [initandlisten] ** WARNING: Access control is not enabled for the database.
2017-11-20T11:03:16.699+0000 I CONTROL  [initandlisten] **          Read and write access to data and configuration is unrestricted.
2017-11-20T11:03:16.699+0000 I CONTROL  [initandlisten]
reptempo:SECONDARY> show databases;
admin    0.000GB
dbTempo  2.499GB
local    0.623GB
reptempo:SECONDARY>

mongo3
MongoDB shell version v3.4.9
connecting to: mongodb://127.0.0.1:27017
MongoDB server version: 3.4.9
Server has startup warnings:
2017-11-20T11:03:24.939+0000 I CONTROL  [initandlisten]
2017-11-20T11:03:24.939+0000 I CONTROL  [initandlisten] ** WARNING: Access control is not enabled for the database.
2017-11-20T11:03:24.939+0000 I CONTROL  [initandlisten] **          Read and write access to data and configuration is unrestricted.
2017-11-20T11:03:24.939+0000 I CONTROL  [initandlisten]
reptempo:SECONDARY> show databases;
2017-11-21T07:53:32.274+0000 E QUERY    [thread1] Error: listDatabases failed:{
	"ok" : 0,
	"errmsg" : "not master and slaveOk=false",
	"code" : 13435,
	"codeName" : "NotMasterNoSlaveOk"
} :
_getErrorWithCode@src/mongo/shell/utils.js:25:13
Mongo.prototype.getDBs@src/mongo/shell/mongo.js:62:1
shellHelper.show@src/mongo/shell/utils.js:769:19
shellHelper@src/mongo/shell/utils.js:659:15
@(shellhelp2):1:1
reptempo:SECONDARY>