Connecting golang mgo to mongo via ssl

Question

I'm trying to setup mongo locally to test the setup described in

https://www.compose.com/articles/connect-to-mongo-3-2-on-compose-from-golang/ "A Little Harder" section

Mongo

I have a working set of self signed credentials, and mongo setup. I've included keys, as those will only be used during dev to make sure mongo ssl code is working.

mongo ssl config

When using this, running via

mongod --config config/location

The config is

net:
  port: 27017
  ssl:
    mode: requireSSL
    CAFile: /data/mongo/ca.crt
    PEMKeyFile: /data/mongo/server.pem
    allowInvalidHostnames: true
    allowConnectionsWithoutCertificates: true

I can then connect to the db with

mongo --ssl --sslCAFile /data/mongo/ca.crt

Golang

func NewSession(url string, ca string) (m *mgo.Session, err error) {
    roots := x509.NewCertPool()
    roots.AppendCertsFromPEM([]byte(ca))

    tlsConfig := &tls.Config{}
    tlsConfig.RootCAs = roots

    url = strings.TrimSuffix(url, "?ssl=true")
    dialInfo, err := mgo.ParseURL(url)
    dialInfo.DialServer = func(addr *mgo.ServerAddr) (net.Conn, error) {
        conn, err := tls.Dial("tcp", addr.String(), tlsConfig)
        return conn, err
    }

    //Here it is the session. Up to you from here ;)
    session, err := mgo.DialWithInfo(dialInfo)
    if err != nil {
        return m, err
    }

    session.SetMode(mgo.Monotonic, true)

    return session, nil
}

Result

The golang stuff tries to connect and hits the 10s timeout. A fmt at the top of session shows the correct file is making it into the ca var.

Mongo logs show

utumongo_1         | 2017-07-27T08:09:14.964+0000 I NETWORK  [initandlisten] connection accepted from 172.19.0.4:57474 #30 (1 connection now open)
utumongo_1         | 2017-07-27T08:09:14.966+0000 E NETWORK  [conn30] SSL: error:14094412:SSL routines:SSL3_READ_BYTES:sslv3 alert bad certificate
utumongo_1         | 2017-07-27T08:09:14.967+0000 I NETWORK  [conn30] end connection 172.19.0.4:57474 (0 connections now open)

Edit Updated mongo config

Connecting golang mgo to mongo via ssl

1 Answers