feat: Setup clustered dev mode

.gitignore

@@ -34,8 +34,8 @@ node_modules
 /priv/static/
 
 # Mnesia DBs
-/apps/*/priv/mnesia/
+/apps/*/priv/mnesia*
-/priv/mnesia/
+/priv/mnesia*
 
 # Lock file for Brew, since the versions aren't really stable & isolated anyway
 Brewfile.lock.json

config/config.exs

@@ -74,7 +74,7 @@ config :app,
   crontab: [
   ]
 
-config :mnesia, dir: to_charlist(Path.expand("./priv/mnesia"))
+config :mnesia, dir: to_charlist(Path.expand("./priv/mnesia@#{Kernel.node}"))
 
 # Feature flags
 

config/dev.exs

@@ -15,7 +15,7 @@ use Mix.Config
 ]
 |> Enum.map(fn {otp_app, module} ->
   config otp_app, Module.concat(module, "Endpoint"),
-    http: [port: 4000],
+    http: [port: String.to_integer(System.get_env("PORT") || "4000")],
     debug_errors: true,
     code_reloader: true,
     check_origin: false,
@@ -29,13 +29,13 @@ use Mix.Config
       ]
     ]
 
-  config otp_app, Module.concat(module, "Endpoint"),
+  config otp_app, AppWeb.Endpoint,
     live_reload: [
       patterns: [
         ~r"priv/static/.*(js|css|png|jpeg|jpg|gif|svg)$",
         ~r"priv/gettext/.*(po)$",
-        ~r"lib/app/(live|views)/.*(ex)$",
+        ~r"(live|views)/.*(ex)$",
-        ~r"lib/app/templates/.*(eex)$"
+        ~r"templates/.*(eex)$"
       ]
     ]
 end)
@@ -61,7 +61,7 @@ config :core, Legendary.CoreMailer, adapter: Bamboo.LocalAdapter
 config :libcluster,
   topologies: [
     erlang_hosts: [
-      strategy: Elixir.Cluster.Strategy.ErlangHosts,
+      strategy: Elixir.Cluster.Strategy.Gossip,
     ]
   ]
 

package.json

@@ -22,9 +22,10 @@
     "@semantic-release/commit-analyzer": "^6.1.0",
     "@semantic-release/exec": "^5.0.0",
     "@semantic-release/git": "^7.0.8",
-    "@semantic-release/npm": "^7.0.9",
+    "@semantic-release/npm": "^7.1.3",
     "dot": "^1.1.3",
-    "semantic-release": "^15.14.0"
+    "http-proxy": "^1.18.1",
+    "semantic-release": "^17.4.4"
   },
   "release": {
     "plugins": [

script/proxy

@@ -0,0 +1,34 @@
+#!/usr/bin/env node
+
+var http = require('http'),
+    httpProxy = require('http-proxy');
+
+//
+// Create a proxy server with custom application logic
+//
+var proxy = new httpProxy.createProxyServer({});
+
+var proxyServer = http.createServer(function (req, res) {
+  proxy.web(req, res, {
+    target: {
+      host: 'localhost',
+      port: 4001
+    }
+  });
+});
+
+//
+// Listen to the `upgrade` event and proxy the
+// WebSocket requests as well.
+//
+proxyServer.on('upgrade', function (req, socket, head) {
+  proxy.ws(req, socket, head, {
+    target: {
+      host: 'localhost',
+      port: 4001
+    }
+  });
+});
+
+console.log("listening on port 4000")
+proxyServer.listen(4000);

script/server-clustered

@@ -0,0 +1,33 @@
+#!/usr/bin/env bash
+
+set -x
+set -e
+
+DIR_PATH=$(dirname $0)
+
+$DIR_PATH/update
+
+trap_with_arg() { # from https://stackoverflow.com/a/2183063/804678
+  local func="$1"; shift
+  for sig in "$@"; do
+    trap "$func $sig" "$sig"
+  done
+}
+
+stop() {
+  trap - SIGINT EXIT
+  printf '\n%s\n' "received $1, killing child processes"
+  kill -s SIGINT 0
+}
+
+trap_with_arg 'stop' EXIT SIGINT SIGTERM SIGHUP
+
+CLUSTER_COOKIE=`openssl rand -hex 8`
+
+PORT=4002 elixir --sname two   --cookie $CLUSTER_COOKIE -S mix phx.server 2>/dev/null &
+PORT=4003 elixir --sname three --cookie $CLUSTER_COOKIE -S mix phx.server 2>/dev/null &
+PORT=4004 elixir --sname four  --cookie $CLUSTER_COOKIE -S mix phx.server 2>/dev/null &
+
+$DIR_PATH/proxy &
+
+PORT=4001 iex    --sname one --cookie $CLUSTER_COOKIE -S mix phx.server