Add makefile and a way to easily overwrite configuration

.gitignore

@@ -18,5 +18,3 @@ _build
 rebar3.crashdump
 *~
 config/prod*
-config/proxy*
-deploy/*.retry

Makefile

+INSTALL_BASE:=/opt
+INSTALL_TO:=$(INSTALL_BASE)
+REBAR3:=./rebar3
+SERVICE:=/etc/systemd/system/mtproto-proxy.service
+LOGDIR:=/var/log/mtproto-proxy
+USER:=mtproto-proxy
+
+
+all: config/prod-sys.config config/prod-vm.args
+	$(REBAR3) as prod release
+
+config/prod-sys.config: config/sys.config.example
+	[ -f $@ ] && diff $^ $@ || true
+	cp -i -b $^ $@
+config/prod-vm.args: config/vm.args.example
+	[ -f $@ ] && diff $^ $@ || true
+	cp -i -b $^ $@
+
+$(LOGDIR):
+	mkdir -p $(LOGDIR)
+	chown $(USER) $(LOGDIR)
+
+
+install: $(LOGDIR)
+	sudo useradd -r $(USER) || true
+	cp -n -r _build/prod/rel/mtp_proxy $(INSTALL_BASE)
+	mkdir -p $(INSTALL_BASE)/mtp_proxy/log
+	chmod 777 $(INSTALL_BASE)/mtp_proxy/log
+	cp -n config/mtproto-proxy.service $(SERVICE)
+	systemctl daemon-reload
+
+uninstall:
+# TODO: ensure service is stopped
+	rm $(SERVICE)
+	rm -r $(INSTALL_BASE)/mtp_proxy
+	systemctl daemon-reload

README.md

@@ -15,10 +15,27 @@ Features
 * Small codebase compared to oficial one
 * A lots of metrics could be exported (optional)
 
-How to start
-------------
+How to start - quick
+--------------------
+
+```
+sudo apt install erlang-nox erlang-dev build-essential
+git clone https://github.com/seriyps/mtproto_proxy.git
+cd mtproto_proxy/
+cp config/vm.args.example config/prod-vm.args
+cp config/sys.config.example config/prod-sys.config
+# configure your port, secret, ad_tag. See [Settings](#settings) below.
+nano config/prod-sys.config
+make && sudo make install
+sudo systemctl enable mtproto-proxy
+sudo systemctl start mtproto-proxy
+```
+
+How to start - detailed
+--------------------
 
-Install deps (ubuntu 18.04)
+
+### Install deps (ubuntu 18.04)
 
 ```
 sudo apt install erlang-nox erlang-dev build-essential
@@ -28,68 +45,137 @@ You need Erlang version 20 or higher! If your version is older, please, check
 [Erlang solutions esl-erlang package](https://www.erlang-solutions.com/resources/download.html)
 or use [kerl](https://github.com/kerl/kerl).
 
-Get the code:
+### Get the code:
 
 ```
 git clone https://github.com/seriyps/mtproto_proxy.git
 cd mtproto_proxy/
 ```
 
-Update settings (see [Settings](#settings)).
+### Create config file
+
+see [Settings](#settings).
 
-Compile:
+### Build and install
 
 ```
-./rebar3 release
+make && sudo make install
 ```
 
-Make sure your limit of open files is high enough! Check `ulimit -n`.
-You may need to tweak your `/etc/security/limits.conf` or systemd `LimitNOFILE`
-to be able to handle more than ~500 clients.
+This will:
+* install proxy into `/opt/mtp_proxy`
+* create a system user
+* install systemd service
+* create a directory for logs in `/var/log/mtproto-proxy`
+* Configure ulimit of max open files and `CAP_NET_BIND_SERVICE` by systemd
 
-Start with interactive console (recommended for testing)
+### Start and enable start on system start-up
 
 ```
-./_build/default/rel/mtp_proxy/bin/mtp_proxy console
+sudo systemctl enable mtproto-proxy
+sudo systemctl start mtproto-proxy
 ```
 
-Or start in foreground (recommended for systemd service)
+Done! Proxy is up and ready to serve now!
 
-```
-./_build/default/rel/mtp_proxy/bin/mtp_proxy foreground
-```
+### Stop / uninstall
 
-Or start in background (to run as a service without supervision)
+Stop:
 
 ```
-./_build/default/rel/mtp_proxy/bin/mtp_proxy start
+sudo systemctl stop mtproto-proxy
 ```
 
-Stop proxy started in background
+Uninstall:
 
 ```
-./_build/default/rel/mtp_proxy/bin/mtp_proxy stop
+sudo systemctl stop mtproto-proxy
+sudo systemctl disable mtproto-proxy
+sudo make uninstall
 ```
 
 Logs can be found at
 
 ```
-./_build/default/rel/mtp_proxy/log/
+/var/log/mtproto-proxy/application.log
 ```
 
 Settings
 --------
 
-See `src/mtproto_proxy.app.src`.
+All possible documanted configuration options could be found
+in `src/mtproto_proxy.app.src`. Do not edit this file!
+
+To change configuration, edit `config/prod-sys.config`:
+
+Comments in this file start from `%%`.
+Default port is 1443 and default secret is `d0d6e111bada5511fcce9584deadbeef`.
+
+Secret key and proxy URL will be printed on start.
 
-Secret key will be printed on start.
+The easiest way to update config right now is to edit `config/prod-sys.config`
+and then re-install proxy by
+```
+sudo make uninstall && make && sudo make install
+```
+
+### Change default port / secret / ad tag
+
+To change default settings, change `mtproto_proxy` section as:
+```
+ {mtproto_proxy,
+  %% see src/mtproto_proxy.app.src for examples.
+  %% DO NOT EDIT src/mtproto_proxy.app.src!!!
+  [
+   {ports,
+    [#{name => mtp_handler1,
+       listen_ip => "0.0.0.0",
+       port => 1443,
+       secret => <<"d0d6e111bada5511fcce9584deadbeef">>,
+       tag => <<"dcbe8f1493fa4cd9ab300891c0b5b326">>}
+    ]}
+   ]},
+
+ {lager,
+<...>
+```
+(so, remove `%%`s) and replace `port` / `secret` / `tag` with yours.
+
+### Listen on multiple ports / IPs
+
+You can start proxy on many IP addresses or ports with different secrets/ad tags.
+To do so, just add more configs to `ports` section, separated by comma, eg:
+
+```
+ {mtproto_proxy,
+  %% see src/mtproto_proxy.app.src for examples.
+  %% DO NOT EDIT src/mtproto_proxy.app.src!!!
+  [
+   {ports,
+    [#{name => mtp_handler_1,
+       listen_ip => "0.0.0.0",
+       port => 1443,
+       secret => <<"d0d6e111bada5511fcce9584deadbeef">>,
+       tag => <<"dcbe8f1493fa4cd9ab300891c0b5b326">>},
+     #{name => mtp_handler_2,
+       listen_ip => "0.0.0.0",
+       port => 2443,
+       secret => <<"100000000000000000000000000000001">>,
+       tag => <<"cf8e6baff125ed5f661a761e69567711">>}
+    ]}
+   ]},
+
+ {lager,
+<...>
+```
 
+Each section should have unique `name`!
 
 Helpers
 -------
 
-Number of connections in background mode
+Number of connections
 
 ```
-./_build/default/rel/mtp_proxy/bin/mtp_proxy eval 'lists:sum([proplists:get_value(all_connections, L) || {_, L} <- ranch:info()]).'
+/opt/mtp_proxy/bin/mtp_proxy eval 'lists:sum([proplists:get_value(all_connections, L) || {_, L} <- ranch:info()]).'
 ```

config/mtproto-proxy.service

+[Unit]
+SourcePath=/opt/mtp_proxy/bin/mtp_proxy
+Description=Starts the mtproto_proxy server
+After=local-fs.target
+After=remote-fs.target
+After=network-online.target
+After=systemd-journald-dev-log.socket
+After=nss-lookup.target
+Wants=network-online.target
+Requires=epmd.service
+
+[Service]
+Type=simple
+User=mtproto-proxy
+Group=mtproto-proxy
+Environment="RUNNER_LOG_DIR=/var/log/mtproto-proxy"
+Restart=on-failure
+TimeoutSec=1min
+IgnoreSIGPIPE=no
+KillMode=process
+GuessMainPID=no
+RemainAfterExit=no
+LimitNOFILE=40960
+AmbientCapabilities=CAP_NET_BIND_SERVICE
+ExecStart=/opt/mtp_proxy/bin/mtp_proxy foreground
+ExecStop=/opt/mtp_proxy/bin/mtp_proxy stop
+TimeoutStopSec=15s
\ No newline at end of file

config/sys.config.example

+%% -*- mode: erlang -*-
+[
+ {mtproto_proxy,
+  %% see src/mtproto_proxy.app.src for examples.
+  %% DO NOT EDIT src/mtproto_proxy.app.src!!!
+  [
+   %% {ports,
+   %%  [#{name => mtp_handler1,
+   %%     listen_ip => "0.0.0.0",
+   %%     port => 1443,
+   %%     secret => <<"d0d6e111bada5511fcce9584deadbeef">>,
+   %%     tag => <<"dcbe8f1493fa4cd9ab300891c0b5b326">>}
+   %%  ]}
+   ]},
+
+ %% Logging config
+ {lager,
+  [{log_root, "/var/log/mtproto-proxy"},
+   {crash_log, "crash.log"},
+   {handlers,
+    [
+     {lager_console_backend,
+      [{level, critical}]},
+
+     {lager_file_backend,
+      [{file, "application.log"},
+       {level, info},
+
+       %% Do fsync only on critical messages
+       {sync_on, critical},
+       %% If we logged more than X messages in a second, flush the rest
+       {high_water_mark, 300},
+       %% If we hit hwm and msg queue len is >X, flush the queue
+       {flush_queue, true},
+       {flush_threshold, 2000},
+       %% How often to check if log should be rotated
+       {check_interval, 5000},
+       %% Rotate when file size is 100MB+
+       {size, 104857600}
+      ]}
+    ]}]}
+].

config/vm.args.example

+-sname mtproto_proxy
+
+-setcookie mtproto-proxy-cookie
+
+## this one is essential for >500 connections
++K true
\ No newline at end of file

rebar.config

@@ -15,8 +15,15 @@
         %% {sys_config, "./config/sys.config"},
         %% {vm_args, "./config/vm.args"},
 
-        {dev_mode, false},
         {include_erts, false},
-
         {extended_start_script, true}]
 }.
+
+{profiles,
+ [{prod,
+   [{relx, [{dev_mode, false},
+            {sys_config, "./config/prod-sys.config"},
+            {vm_args, "./config/prod-vm.args"},
+            {include_erts, true}]}]
+  }]
+}.

src/mtproto_proxy.app.src

@@ -31,13 +31,13 @@
 
         %% Interface to listen for incoming connections
         %% If not set, 0.0.0.0 will be used
-        {listen_ip, {0, 0, 0, 0}},
+        {listen_ip, "0.0.0.0"},
         %% You can add as much as you want. Names and ports should be unique
         {ports, [#{name => mtp_handler,
                    port => 1443,
                    %% You can tell it to listen on specific IP.
                    %% If not set, top-level listen_ip will be used.
-                   %% listen_ip => {1, 2, 3, 4},
+                   %% listen_ip => "1.2.3.4",
 
                    %% secret should be 32 hex chars [0-9a-f]
                    secret => <<"d0d6e111bada5511fcce9584deadbeef">>,

src/mtproto_proxy_app.erl

@@ -31,9 +31,10 @@ stop(_State) ->
 %% Internal functions
 %%====================================================================
 start_proxy(#{name := Name, port := Port, secret := Secret, tag := Tag} = P) ->
-    ListenIp = maps:get(
-                 listen_ip, P,
-                 application:get_env(?APP, listen_ip, {0, 0, 0, 0})),
+    ListenIpStr = maps:get(
+                    listen_ip, P,
+                    application:get_env(?APP, listen_ip, "0.0.0.0")),
+    {ok, ListenIp} = inet:parse_ipv4_address(ListenIpStr),
     NumAcceptors = application:get_env(?APP, num_acceptors, 60),
     MaxConnections = application:get_env(?APP, max_connections, 10240),
     Res =
@@ -44,8 +45,12 @@ start_proxy(#{name := Name, port := Port, secret := Secret, tag := Tag} = P) ->
            {num_acceptors, NumAcceptors},
            {max_connections, MaxConnections}],
           mtp_handler, [Secret, Tag]),
-    io:format("Proxy started on ~s:~p with secret: ~s~n",
-              [inet:ntoa(ListenIp), Port, Secret]),
+    Url = io_lib:format(
+            "https://t.me/proxy?server=~s&port=~w&secret=~s",
+            [application:get_env(?APP, external_ip, ListenIpStr),
+             Port, Secret]),
+    io:format("Proxy started on ~s:~p with secret: ~s, tag: ~s~nUrl: ~s~n",
+              [ListenIpStr, Port, Secret, Tag, Url]),
     Res.
 
 stop_proxy(#{name := Name}) ->