Question

I am trying to configure a replica set with two nodes but when I execute rs.add("node2") and then rs.status() both nodes are set to PRIMARY. Also when I run rs.status() on the other node the only node that appears is the local one.

Edit1:
rs.status() output:

    {
        "set" : "rs0",
        "date" : ISODate("2012-09-22T01:01:12Z"),
        "myState" : 1,
        "members" : [
                {
                        "_id" : 0,
                        "name" : "node1:27017",
                        "health" : 1,
                        "state" : 1,
                        "stateStr" : "PRIMARY",
                        "uptime" : 70968,
                        "optime" : Timestamp(1348207012000, 1),
                        "optimeDate" : ISODate("2012-09-21T05:56:52Z"),
                        "self" : true
                },
                {
                        "_id" : 1,
                        "name" : "node2:27017",
                        "health" : 1,
                        "state" : 1,
                        "stateStr" : "PRIMARY",
                        "uptime" : 68660,
                        "optime" : Timestamp(1348205568000, 1),
                        "optimeDate" : ISODate("2012-09-21T05:32:48Z"),
                        "lastHeartbeat" : ISODate("2012-09-22T01:01:11Z"),
                        "pingMs" : 0
                }
        ],
        "ok" : 1
}

Edit2: I tried doing the same thing with 3 different nodes and I got the same result (rs.status() says I have a replica set with three primary nodes). Is it possible that this problem is caused by some specific configuration of the network?

Answer 1

If you issue rs.initiate() from both of your the members of the replica set before rs.add() then both will come up as primary.

You should only use rs.initiate() on one of the members of the replica set, the one that you intend to be primary initially. Then you can rs.add() the other member to the replica set.