Making a replica in MongoDB - mongodb

Question

I am trying to create a replica in mongodb. I have used the following commands to make a replica. I got the following outputs.
cfg = { _id : "mySet", members : [ { _id : 0, host : "localhost:27017"
} ] }
rs.initiate(cfg)
Output:
{
"ok" : 0,
"errmsg" : "Attempting to initiate a replica set with name mySet, but command line reports 0; rejecting",
"code" : 93,
"codeName" : "InvalidReplicaSetConfig"
}
i get the following output:
017-09-22T14:22:22.093+0530 E QUERY [thread1] ReferenceError: conf is not defined :
#(shell):1:1
When i ran show dbs and rs.config(), i get the following errors:
show dbs
2017-09-22T14:23:56.234+0530 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
> rs.config()
2017-09-22T14:24:23.718+0530 E QUERY [thread1] Error: Could not
retrieve replica set config: {
"info" : "run rs.initiate(...) if not yet done for the set",
"ok" : 0,
"errmsg" : "no replset config has been received",
"code" : 94,
"codeName" : "NotYetInitialized"
} :
rs.conf#src/mongo/shell/utils.js:1276:11
#(shell):1:1

Answer 1

delete all replication and oplog.
use local
db.dropDatabase()
restart the mongo
config = {_id: "repl1", members:[
{_id: 0, host: 'localhost:15000'},
{_id: 1, host: '192.168.2.100:15000'}]
}
rs.initiate(config);