Clojure - how to connect to running REPL process remotely

Question

How can I connect to a REPL session running on a remote server that I can access, for example via SSH?

Answer 1

This might be obvious to network specialists but took me a while to find out so documenting it here.

On the remote server, when launching your REPL application instead of just lein repl force binding to a port:

lein repl :start :port 40000

On your machine, connect to the remote server the normal way (for example via ssh). Then connect to your application this way:

lein repl :connect localhost:40000

That's it!

Answer 2

I just want to sum up the two answers above. It works on my machine:

On the remote machine

lein repl :start :port 40000

On the local machine

# SSH tunnel on one shell
ssh -NL 40000:localhost:40000 username@host

# Connect to the remote repl on another shell
lein repl :connect localhost:40000