Connect erlang nodes on docker
This is how you would do it without docker-compose
for Erlang nodes.
1. Create the network
docker network create example
2. Start docker containers
Terminal 1
$ docker run --rm -it --name bar -h bar --net example erlang:19.3 /bin/bashroot@bar:/# erl -sname bar -setcookie exampleErlang/OTP 19 [erts-8.3.5.1] [source] [64-bit] [smp:4:4] [ds:4:4:10] [async-threads:10] [hipe] [kernel-poll:false]Eshell V8.3.5.1 (abort with ^G)(bar@bar)1>
Terminal 2
docker run --rm -it --name foo -h foo --net example erlang:19.3 /bin/bashroot@foo:/# erl -sname foo -setcookie exampleErlang/OTP 19 [erts-8.3.5.1] [source] [64-bit] [smp:4:4] [ds:4:4:10] [async-threads:10] [hipe] [kernel-poll:false]Eshell V8.3.5.1 (abort with ^G)(foo@foo)1>
3. Check connectivity
Terminal 1
(foo@foo)1> net_adm:ping(bar@bar).pong
Terminal 2
(bar@bar)1> net_adm:ping(foo@foo).pong
Getting a remote shell for a release running on a docker container
1. Start a bash
shell in one of the two docker containers
docker exec -it foo /bin/bash
Where foo
is the name for the docker container.
2. Start a remote shell
./rel/your_app/bin/your_app console
I assume you know the path to the release inside the container.
Use docker-compose.
Something like this:
docker-compose.yml:
version: "3"services: elixir1: image: image-name #(other configs here, like ports, volumes) elixir2: image: image-name #(other configs here, like ports, volumes)
Then, you are able to point DNS elixir1
and elixir2
with that names among them.
Replace your docker run
commands with:
docker-compose up