├── .dockerignore ├── .gitignore ├── Dockerfile ├── LICENSE ├── README.md ├── apps └── epmdlessless │ └── src │ ├── epmdlessless.app.src │ ├── epmdlessless_app.erl │ └── epmdlessless_sup.erl ├── config ├── sys.config.src └── vm.args.src ├── docker-compose.yml ├── rebar.config └── rebar.lock /.dockerignore: -------------------------------------------------------------------------------- 1 | _build 2 | Dockerfile 3 | _checkouts -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | .rebar3 2 | _* 3 | .eunit 4 | *.o 5 | *.beam 6 | *.plt 7 | *.swp 8 | *.swo 9 | .erlang.cookie 10 | ebin 11 | log 12 | erl_crash.dump 13 | .rebar 14 | logs 15 | _build 16 | .idea 17 | *.iml 18 | rebar3.crashdump 19 | *~ 20 | -------------------------------------------------------------------------------- /Dockerfile: -------------------------------------------------------------------------------- 1 | # FROM erlang:23.1.3 as builder 2 | FROM erlang@sha256:d7d7659837ecd3d2cec6be6a18d507d1e0a0784331ac2ffdaa4adef7da475c2f as builder 3 | 4 | WORKDIR /app/src 5 | ENV REBAR_BASE_DIR /app/_build 6 | 7 | # build and cache dependencies as their own layer 8 | COPY rebar.config rebar.lock ./ 9 | RUN rebar3 compile 10 | 11 | COPY . ./ 12 | RUN rebar3 as prod compile 13 | 14 | FROM builder as releaser 15 | 16 | # create the directory to unpack the release to 17 | RUN mkdir -p /opt/rel 18 | 19 | RUN rebar3 as prod tar && \ 20 | tar -zxvf $REBAR_BASE_DIR/prod/rel/*/*.tar.gz -C /opt/rel 21 | 22 | FROM debian:buster as runner 23 | 24 | WORKDIR /opt/epmdlessless 25 | 26 | ENV COOKIE=epmdlessless \ 27 | # write files generated during startup to /tmp 28 | RELX_OUT_FILE_PATH=/tmp 29 | 30 | # openssl needed by the crypto app 31 | RUN apt-get update && apt-get install -y openssl 32 | 33 | COPY --from=releaser /opt/rel ./ 34 | 35 | ENTRYPOINT ["/opt/epmdlessless/bin/epmdlessless"] 36 | CMD ["foreground"] 37 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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Simply 10 | run `up` to build the images and start the 3 nodes: 11 | 12 | ``` shell 13 | $ docker-compose up 14 | ``` 15 | 16 | ## Clustering Nodes 17 | 18 | Use `docker exec` to open a remote shell on `node_a` and connect to `node_b`: 19 | 20 | ``` shell 21 | $ docker exec -ti node_a bin/epmdlessless remote_console 22 | Erlang/OTP 23 [erts-11.1.3] [source] [64-bit] [smp:8:8] [ds:8:8:10] [async-threads:1] [hipe] 23 | 24 | Eshell V11.1.3 (abort with ^G) 25 | (epmdlessless@node_a)1> net_kernel:connect_node(epmdlessless@node_b). 26 | true 27 | (epmdlessless@node_a)2> nodes(). 28 | [epmdlessless@node_b] 29 | ``` 30 | 31 | Do the same on `node_c` and also connect to `node_b` and you'll see the full 32 | mesh is created with `node_a`: 33 | 34 | ``` shell 35 | $ docker exec -ti node_c bin/epmdlessless remote_console 36 | Erlang/OTP 23 [erts-11.1.3] [source] [64-bit] [smp:8:8] [ds:8:8:10] [async-threads:1] [hipe] 37 | 38 | Eshell V11.1.3 (abort with ^G) 39 | (epmdlessless@node_c)1> net_kernel:connect_node(epmdlessless@node_b). 40 | true 41 | (epmdlessless@node_c)2> nodes(). 42 | [epmdlessless@node_b,epmdlessless@node_a] 43 | ``` 44 | 45 | -------------------------------------------------------------------------------- /apps/epmdlessless/src/epmdlessless.app.src: -------------------------------------------------------------------------------- 1 | {application, epmdlessless, 2 | [{description, "An OTP application"}, 3 | {vsn, "0.1.0"}, 4 | {registered, []}, 5 | {mod, {epmdlessless_app, []}}, 6 | {applications, 7 | [kernel, 8 | stdlib 9 | ]}, 10 | {env,[]}, 11 | {modules, []}, 12 | 13 | {licenses, ["Apache 2.0"]}, 14 | {links, []} 15 | ]}. 16 | -------------------------------------------------------------------------------- /apps/epmdlessless/src/epmdlessless_app.erl: -------------------------------------------------------------------------------- 1 | %%%------------------------------------------------------------------- 2 | %% @doc epmdlessless public API 3 | %% @end 4 | %%%------------------------------------------------------------------- 5 | 6 | -module(epmdlessless_app). 7 | 8 | -behaviour(application). 9 | 10 | -export([start/2, stop/1]). 11 | 12 | start(_StartType, _StartArgs) -> 13 | epmdlessless_sup:start_link(). 14 | 15 | stop(_State) -> 16 | ok. 17 | 18 | %% internal functions 19 | -------------------------------------------------------------------------------- /apps/epmdlessless/src/epmdlessless_sup.erl: -------------------------------------------------------------------------------- 1 | %%%------------------------------------------------------------------- 2 | %% @doc epmdlessless top level supervisor. 3 | %% @end 4 | %%%------------------------------------------------------------------- 5 | 6 | -module(epmdlessless_sup). 7 | 8 | -behaviour(supervisor). 9 | 10 | -export([start_link/0]). 11 | 12 | -export([init/1]). 13 | 14 | -define(SERVER, ?MODULE). 15 | 16 | start_link() -> 17 | supervisor:start_link({local, ?SERVER}, ?MODULE, []). 18 | 19 | %% sup_flags() = #{strategy => strategy(), % optional 20 | %% intensity => non_neg_integer(), % optional 21 | %% period => pos_integer()} % optional 22 | %% child_spec() = #{id => child_id(), % mandatory 23 | %% start => mfargs(), % mandatory 24 | %% restart => restart(), % optional 25 | %% shutdown => shutdown(), % optional 26 | %% type => worker(), % optional 27 | %% modules => modules()} % optional 28 | init([]) -> 29 | SupFlags = #{strategy => one_for_all, 30 | intensity => 0, 31 | period => 1}, 32 | ChildSpecs = [], 33 | {ok, {SupFlags, ChildSpecs}}. 34 | 35 | %% internal functions 36 | -------------------------------------------------------------------------------- /config/sys.config.src: -------------------------------------------------------------------------------- 1 | [ 2 | {epmdlessless, []} 3 | ]. 4 | -------------------------------------------------------------------------------- /config/vm.args.src: -------------------------------------------------------------------------------- 1 | -sname epmdlessless 2 | 3 | -setcookie epmdlessless_cookie 4 | 5 | +K true 6 | +A30 7 | -------------------------------------------------------------------------------- /docker-compose.yml: -------------------------------------------------------------------------------- 1 | version: '3.8' 2 | services: 3 | 4 | node_a: 5 | container_name: node_a 6 | hostname: node_a 7 | build: . 8 | environment: 9 | - ERL_DIST_PORT=8001 10 | 11 | node_b: 12 | container_name: node_b 13 | hostname: node_b 14 | build: . 15 | environment: 16 | - ERL_DIST_PORT=8001 17 | 18 | node_c: 19 | container_name: node_c 20 | hostname: node_c 21 | build: . 22 | environment: 23 | - ERL_DIST_PORT=8001 24 | -------------------------------------------------------------------------------- /rebar.config: -------------------------------------------------------------------------------- 1 | {erl_opts, [debug_info]}. 2 | {deps, []}. 3 | 4 | {relx, [{release, {epmdlessless, "0.1.0"}, 5 | [epmdlessless, 6 | sasl]}, 7 | 8 | {mode, dev}, 9 | 10 | {vm_args_src, "config/vm.args.src"} 11 | ]}. 12 | 13 | {profiles, [{prod, [{relx, [{mode, prod}]}]}]}. 14 | -------------------------------------------------------------------------------- /rebar.lock: -------------------------------------------------------------------------------- 1 | []. 2 | --------------------------------------------------------------------------------