Yep, I use something like this to update my blog when I have added a new post or modified an existing one:

sudo -u www-data /var/www/blog/bin/mebe rpc "GenServer.call(Mebe2.Engine.Worker, :refresh, 30_000)"

Mix releases include the “rpc” script builtin.

I think you can do this in multiple ways. Define a port to receive messages or use the rpc to send messages directly in elixir.

/path/to/_build/prod/rel/my_app/bin/my_app rpc "Genserver.cast(...)"

Really cool solution!

ps: Security Notes:

• I hope your document root is not pointed at /var/www
• You have directory listing and all the other nice stuff disabled with the default apache or another unix handler
• For the future please create a specific user for your projects, applications, scripts and put them into respective directories and run from that location with that user

ie: blog

user: blog
homedir: /home/blog

$ > ps
... blog ...... /home/blog/bin/mebe ......