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Why is my hypnosis usage crashing down on Heroku?

I am trying to get hypnotoad with a Mojolicious :: Lite application running on Heroku with Perloku . Something does not happen there when hypnotoad gets into the execution loop, which causes it to fail. I suppose I am missing something simple, but Heroku docs did not help, and I was not able to fix the good error messages from this.

I start with a very simple application, so I show some environment variables:

#!/usr/bin/env perl # today use Mojolicious::Lite; get '/' => sub { my $c = shift; my $content = "Perl: $^X Pid: $$\n\n"; foreach my $key ( keys %ENV ) { next unless $key =~ /Mojo|toad/i; $content .= "$key $ENV{$key}\n"; } $c->stash( content => $content ); $c->render('index'); }; app->start; __DATA__ @@ index.html.ep % layout 'default'; % title 'Welcome'; <p>Welcome to the Mojolicious real-time web framework!</p> <pre> <%= $content %> </pre> @@ layouts/default.html.ep <!DOCTYPE html> <html> <head><title><%= title %></title></head> <body><%= content %></body> </html>

When I run it locally, I have no problem. I can see from the environment variables that my program is running under hypnotoad:

 Welcome to the Mojolicious real-time web framework! Perl: /Users/brian/Dropbox/bin/perls/perl5.20.0 Pid: 40006 HYPNOTOAD_PID 39981 MOJO_HELP HYPNOTOAD_TEST HYPNOTOAD_EXE /Users/brian/bin/perls/hypnotoad5.20.0 MOJO_REUSE 0.0.0.0:8080:6 HYPNOTOAD_REV 3 HYPNOTOAD_APP /Users/brian/Desktop/toady.d/toady MOJO_MODE production MOJO_HOME HYPNOTOAD_STOP HYPNOTOAD_FOREGROUND

Now I am deploying this with Mojolicious :: Command :: deploy :: heroku :

 % toady deploy heroku --create

This works on https://frozen-brushlands-4002.herokuapp.com , using the default Perloku file:

 #!/bin/sh ./toady daemon --listen http://*:$PORT --mode production

This does not work hypnotoad, although despite some of the links that I have seen, this suggests what I should get. The application works though:

 Welcome to the Mojolicious real-time web framework! Perl: /app/vendor/perl/bin/perl Pid: 3 MOJO_REUSE 0.0.0.0:12270:4 MOJO_HOME MOJO_HELP MOJO_MODE production MOJO_EXE ./toady

I decided that I could just modify the Perloku file to run hypnotoad:

 #!/bin/sh /app/vendor/perl/bin/perl /app/vendor/perl-deps/bin/hypnotoad toady

hypnloading starts and shuts down almost immediately without other log messages:

 % heroku logs --app ... 2015-01-04T09:23:36.516864+00:00 heroku[web.1]: Starting process with command `./Perloku` 2015-01-04T09:23:38.321628+00:00 heroku[web.1]: State changed from starting to crashed

I can change the call to use -t to test the application to see if:

 #!/bin/sh /app/vendor/perl/bin/perl /app/vendor/perl-deps/bin/hypnotoad -t toady

It works, and I get "Everything looks good!" message, therefore hypnosis is performed:

 2015-01-04T09:36:36.955680+00:00 heroku[web.1]: Starting process with command `./Perloku` 2015-01-04T09:36:38.340717+00:00 app[web.1]: Everything looks good! 2015-01-04T09:36:39.085887+00:00 heroku[web.1]: State changed from starting to crashed

I turn on Mojo debug logging, but I don't see any additional output besides my own statements.

 #!/usr/bin/env perl use Mojolicious::Lite; $|++; my $log = app->log; $log->level( 'debug' ); $log->debug( "INC: @INC" ); get '/' => sub { ...; }; $log->debug( "Right before start" ); my $app = app->start; $log->debug( "Right after start" ); $app; # must return application object

I tried other things, for example, to load a module that, as I know, does not exist, and I get the expected error "Could not be found" in the logs.

The launch from the shell to the hero ( heroku run bash ) was not covered. The output of mojo version is the same as on my local machine:

 $ perl vendor/perl-deps/bin/mojo version CORE Perl (v5.16.2, linux) Mojolicious (5.71, Tiger Face) OPTIONAL EV 4.0+ (n/a) IO::Socket::Socks 0.64+ (n/a) IO::Socket::SSL 1.84+ (n/a) Net::DNS::Native 0.15+ (n/a) You might want to update your Mojolicious to 5.72.

I see there is something really simple that I miss, but at the same time, none of this is archived for easy debugging.

Oleg is getting a little closer, but there are still problems. I already tried the foreground option and ran into the same problems, but didn't mention it.

If I start hypnotoad in the foreground, it tries to bind to the address. It cannot communicate with port 80 (or 443) and fails, and it can listen to 127.0.0.1: almost, but it looks like it cannot fully listen:

 2015-01-13T11:47:54+00:00 heroku[slug-compiler]: Slug compilation started 2015-01-13T11:48:32+00:00 heroku[slug-compiler]: Slug compilation finished 2015-01-13T11:48:32.735095+00: 00 heroku[api]: Deploy dcab778 by ... 2015-01-13T11:48:32.735095+00:00 heroku[api]: Release v31 created by ... 2015-01-13T11:48:32.969489+00:00 heroku[web.1]: State changed from crashed to starting 2015-01-13T11:48:34.909134+00:00 heroku[web.1]: Starting process with command `./Perloku` 2015-01-13T11:48:36.045985+00:00 app[web.1]: Can't create listen socket: Permission denied at /app/vendor/perl-deps/lib/perl5/Mojo/IOLoop.pm line 120. 2015-01-13T11:48:36.920004+00:00 heroku[web.1]: Process exited with status 13 2015-01-13T11:48:36.932014+00:00 heroku[web.1]: State changed from starting to crashed

Here with an unprivileged port:

 2015-01-13T11:39:10+00:00 heroku[slug-compiler]: Slug compilation started 2015-01-13T11:39:44+00:00 heroku[slug-compiler]: Slug compilation finished 2015-01-13T11:39:44.519679+00:00 heroku[api]: Deploy bbd1f68 by ... 2015-01-13T11:39:44.519679+00:00 heroku[api]: Release v29 created by ... 2015-01-13T11:39:44.811111+00:00 heroku[web.1]: State changed from crashed to starting 2015-01-13T11:39:47.382298+00:00 heroku[web.1]: Starting process with command `./Perloku` 2015-01-13T11:39:48.454706+00:00 app[web.1]: [Tue Jan 13 11:39:48 2015] [info] Listening at "http://*:8000". 2015-01-13T11:39:48.454733+00:00 app[web.1]: Server available at http://127.0.0.1:8000. 2015-01-13T11:39:48.454803+00:00 app[web.1]: [Tue Jan 13 11:39:48 2015] [info] Manager 3 started. 2015-01-13T11:39:48.480084+00:00 app[web.1]: [Tue Jan 13 11:39:48 2015] [info] Creating process id file "/app/hypnotoad.pid". 2015-01-13T11:40:47.703110+00:00 heroku[web.1]: Stopping process with SIGKILL 2015-01-13T11:40:47.702867+00:00 heroku[web.1]: Error R10 (Boot timeout) -> Web process failed to bind to $PORT within 60 seconds of launch 2015-01-13T11:40:48.524470+00:00 heroku[web.1]: Process exited with status 137 2015-01-13T11:40:48.534002+00:00 heroku[web.1]: State changed from starting to crashed
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3 answers

Oleg answers the question , but some fragments are missing from the assumptions.

First create a new heroku application and remember the name of the application:

 $ heroku create Creating vast-spire-6174... done, stack is cedar-14 https://vast-spire-6174.herokuapp.com/ | https://git.heroku.com/vast-spire-6174.git

Then add the Perloku assembly:

 $ heroku config:add BUILDPACK_URL=https://github.com/judofyr/perloku.git

Create a repo and configure git on Heroku:

 $ mkdir testapp $ cd testapp $ git init $ heroku git:remote -a vast-spire-6174

For everything to work, you need a Perloku file to run hypnotoad in the foreground. You must specify perl explicity because the shebang line in hypnotoad refers to the temporary location of perl when it was built and where it no longer exists. Change myapp.pl to what you called your application.

 #!/bin/sh /app/vendor/perl/bin/perl /app/vendor/perl-deps/bin/hypnotoad -f myapp.pl

To get everything installed, you use the standard Makefile.PL. Indicate Mojolicious as one of the necessary conditions:

 use strict; use warnings; use ExtUtils::MakeMaker; WriteMakefile( VERSION => '0.01', PREREQ_PM => {'Mojolicious' => '5.72'}, test => {TESTS => 't/*.t'} );

Finally, the application itself, which you can create with mojo (which calls myapp.ppl)

 $ mojo generate lite_app

Here's the generated source:

 #!/usr/bin/env perl use Mojolicious::Lite; # Documentation browser under "/perldoc" plugin 'PODRenderer'; get '/' => sub { my $c = shift; $c->render('index'); }; app->start; __DATA__ @@ index.html.ep % layout 'default'; % title 'Welcome'; Welcome to the Mojolicious real-time web framework! @@ layouts/default.html.ep <!DOCTYPE html> <html> <head><title><%= title %></title></head> <body><%= content %></body> </html>

You need to change the base program, since hypnotoad needs some configuration (where the server does not do this by default):

 #!/usr/bin/env perl use Mojolicious::Lite; # Documentation browser under "/perldoc" plugin 'PODRenderer'; plugin Config => { default => { hypnotoad => { listen => ["http://*:$ENV{PORT}"] } } }; get '/' => sub { my $c = shift; $c->render('index'); }; app->start; __DATA__ @@ index.html.ep % layout 'default'; % title 'Welcome'; Welcome to the Mojolicious real-time web framework! @@ layouts/default.html.ep <!DOCTYPE html> <html> <head><title><%= title %></title></head> <body><%= content %></body> </html>

Once you have all the files, copy them and click on the hero branch.

 $ git add . $ git commit -am "make it better" $ git push heroku master

When you push, the hook launches everything.

 Counting objects: 7, done. Delta compression using up to 4 threads. Compressing objects: 100% (7/7), done. Writing objects: 100% (7/7), 1.14 KiB | 0 bytes/s, done. Total 7 (delta 0), reused 0 (delta 0) remote: Compressing source files... done. remote: Building source: remote: remote: -----> Fetching custom git buildpack... done remote: -----> Perloku app detected remote: -----> Vendoring Perl remote: Using Perl 5.18.1 remote: -----> Installing dependencies remote: --> Working on /tmp/build_a73f24f0619fa2ab299586098c5e8daf remote: Configuring /tmp/build_a73f24f0619fa2ab299586098c5e8daf ... OK remote: ==> Found dependencies: Mojolicious remote: --> Working on Mojolicious remote: Fetching http://www.cpan.org/authors/id/S/SR/SRI/Mojolicious-5.72.tar.gz ... OK remote: Configuring Mojolicious-5.72 ... OK remote: ==> Found dependencies: IO::Socket::IP remote: --> Working on IO::Socket::IP remote: Fetching http://www.cpan.org/authors/id/P/PE/PEVANS/IO-Socket-IP-0.36.tar.gz ... OK remote: Configuring IO-Socket-IP-0.36 ... OK remote: Building IO-Socket-IP-0.36 ... OK remote: Successfully installed IO-Socket-IP-0.36 remote: Building Mojolicious-5.72 ... OK remote: Successfully installed Mojolicious-5.72 remote: <== Installed dependencies for /tmp/build_a73f24f0619fa2ab299586098c5e8daf. Finishing. remote: 2 distributions installed remote: Dependencies installed remote: -----> Discovering process types remote: Procfile declares types -> (none) remote: Default types for Perloku -> web remote: remote: -----> Compressing... done, 14.1MB remote: -----> Launching... done, v5 remote: https://vast-spire-6174.herokuapp.com/ deployed to Heroku remote: remote: Verifying deploy... done. To https://git.heroku.com/vast-spire-6174.git * [new branch] master -> master

The URL of your application appears near the end of the output.

Why does this work for me before I do not know. I let the mojo team turn around for me, so there might be something to investigate there. However, it is a little easier to complete and click without an intermediary.

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This is really just a wild hunch, but maybe the heroics infrastructure does not expect the runner to cease to exist? If so, you can try running hypnotoad with --foreground or -f .

In addition, you can try to do some registration inside the application to make sure that it ever launches it.

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After some testing, I found a way to run hypnotoad on heroku

1. The content of Perloku should look like this

 #!/bin/sh perl /app/vendor/perl-deps/bin/hypnotoad -f mojocrashtest

Description

First of all, we need to call the perl expression. Because the

 heroku run bash head /app/vendor/perl-deps/bin/hypnotoad

shows

 #!/tmp/perl/perls/perl-5.18.1/bin/perl eval 'exec /tmp/perl/perls/perl-5.18.1/bin/perl -S $0 ${1+" $@ "}' if 0; # not running under some shell

where /tmp/perl/perls/perl-5.18.1/bin/perl does not exist. So, /app/vendor/perl-deps/bin/hypnotoad will not start, but perl /app/vendor/perl-deps/bin/hypnotoad will be fine.

Then we need the -f for hypnotoad, as @moritz suggested. Otherwise, the hero will think that your application ended unexpectedly.

2. You must run hypnotoad on the port $ ENV {PORT}

For Mojolicious::Lite you just need to write something like this at the top of your application:

 plugin Config => {default => {hypnotoad => {listen => ["http://*:$ENV{PORT}"]}}};

For a complete application, you can do this inside the startup handler.

3. heroku open

And this is the complete Mojolicious :: Lite application code
 #!/usr/bin/env perl # today use Mojolicious::Lite; plugin Config => {default => {hypnotoad => {listen => ["http://*:$ENV{PORT}"]}}}; get '/' => sub { my $c = shift; my $content = "Perl: $^X Pid: $$\n\n"; foreach my $key ( keys %ENV ) { next unless $key =~ /Mojo|toad/i; $content .= "$key $ENV{$key}\n"; } $c->stash( content => $content ); $c->render('index'); }; app->start; __DATA__ @@ index.html.ep % layout 'default'; % title 'Welcome'; <p>Welcome to the Mojolicious real-time web framework!</p> <pre> <%= $content %> </pre> @@ layouts/default.html.ep <!DOCTYPE html> <html> <head><title><%= title %></title></head> <body><%= content %></body> </html>

hero magazines

 2015-01-13T12:08:04.843204+00:00 heroku[web.1]: Starting process with command `./Perloku` 2015-01-13T12:08:06.019070+00:00 app[web.1]: Server available at http://127.0.0.1:13533. 2015-01-13T12:08:06.018899+00:00 app[web.1]: [Tue Jan 13 12:08:06 2015] [info] Listening at "http://*:13533". 2015-01-13T12:08:06.019035+00:00 app[web.1]: [Tue Jan 13 12:08:06 2015] [info] Manager 3 started. 2015-01-13T12:08:06.055437+00:00 app[web.1]: [Tue Jan 13 12:08:06 2015] [info] Creating process id file "/app/hypnotoad.pid". 2015-01-13T12:08:06.412283+00:00 heroku[web.1]: State changed from starting to up 2015-01-13T12:08:08.040072+00:00 heroku[router]: at=info method=GET path="/" host=floating-temple-3676.herokuapp.com request_id=e9f9bb4d-f71f-4b4c-a129-70faf044c38b fwd=194" dyno=web.1 connect=3ms service=34ms status=200 bytes=586 2015-01-13T12:08:08.029819+00:00 app[web.1]: Use of uninitialized value in concatenation (.) or string at /app/mojocrashtest line 13, <DATA> line 39. 2015-01-13T12:08:08.029836+00:00 app[web.1]: Use of uninitialized value in concatenation (.) or string at /app/mojocrashtest line 13, <DATA> line 39. 2015-01-13T12:08:08.029839+00:00 app[web.1]: Use of uninitialized value in concatenation (.) or string at /app/mojocrashtest line 13, <DATA> line 39. 2015-01-13T12:08:08.029842+00:00 app[web.1]: Use of uninitialized value in concatenation (.) or string at /app/mojocrashtest line 13, <DATA> line 39.

URL for my application: http://floating-temple-3676.herokuapp.com/
BTW, I did not use mojo deploy , just git

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