reconfigure mongodb to a single node

reconfigure-mongodb.txt

> rs.status()
{
        "startupStatus" : 1,
        "ok" : 0,
        "errmsg" : "loading local.system.replset config (LOADINGCONFIG)"
}
> rs.config()
{
        "_id" : "juju",
        "version" : 109633,
        "members" : [
                {
                        "_id" : 0,
                        "host" : "192.168.1.10:37017"
                },
                {
                        "_id" : 1,
                        "host" : "192.168.1.11:37017"
                }
        ]
}
> var cfg = rs.config()
> cfg.members = [{"_id" : 3, "host"  : "192.168.1.11:37017"}]
[ { "_id" : 3, "host" : "192.168.1.11:37017" } ]
> rs.reconfig(cfg , {force : true})
{
        "msg" : "will try this config momentarily, try running rs.conf() again in a few seconds",
        "ok" : 1
}
> rs.conf()
{
        "_id" : "juju",
        "version" : 109633,
        "members" : [
                {
                        "_id" : 3,
                        "host" : "192.168.1.11:37017"
                }
        ]
}

$ sudo service juju-db restart