Two digital ocean nodes running elixir won't connect

Do you have the required ports open (default 4369)?

http://erlang.org/doc/man/epmd.html

Below are the netstats of both machines, there are no firewalls enabled. Do I have to open ports explicitly?

Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name
tcp        0      0 0.0.0.0:37034           0.0.0.0:*               LISTEN      9622/beam.smp
tcp        0      0 127.0.0.11:37039        0.0.0.0:*               LISTEN      -
tcp        0      0 0.0.0.0:4369            0.0.0.0:*               LISTEN      9660/epmd
tcp6       0      0 :::4369                 :::*                    LISTEN      9660/epmd
udp        0      0 127.0.0.11:39595        0.0.0.0:*                           -
udp        0      0 0.0.0.0:46257           0.0.0.0:*                           9601/narcd


Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name
tcp        0      0 0.0.0.0:40515           0.0.0.0:*               LISTEN      9105/beam.smp
tcp        0      0 0.0.0.0:8080            0.0.0.0:*               LISTEN      9105/beam.smp
tcp        0      0 0.0.0.0:4369            0.0.0.0:*               LISTEN      9146/epmd
tcp        0      0 127.0.0.11:33822        0.0.0.0:*               LISTEN      -
tcp6       0      0 :::4369                 :::*                    LISTEN      9146/epmd
udp        0      0 127.0.0.11:34819        0.0.0.0:*                           -
udp        0      0 0.0.0.0:60798           0.0.0.0:*                           9085/narcd

You could try starting epmd in the foreground to see what it says when you try to connect them.

Okay I’ll give this a try when i get the chance later and give an update.

Thanks for your help so far guys!

When you ask your internal DNS, will the longnames resolve to IPv6 or IPv4 Addresses, or are you using IPs directly in the longnames?

i’m using the digital ocean private ips in the long names

As I’m not using DO, I have to ask whether they are v4 or v6. If the latter, try the former.

Is private networking enabled for your droplets?

I think we can assume so:

I’m using v4.

Haven’t really been having any success with this, can’t help but feel there is something i’m missing here but there is no feed back as to why its not working epmd -d doesn’t really show anything…

I should probably add that the instances are running inside docker containers… maybe that could be the issue?