README.md

Perl Custom Runtime for App Engine

Simple guide to running Mojolicious on Google App Engine.

1. Create a new Mojolicious app.

2. Create an app.yaml in the root of your application with the following contents:

   runtime: custom
   env: flex

3. Create a Dockerfile in the root of your application.

4. Create a project in the Google Developers Console.

5. Make sure you have the Google Cloud SDK installed. When you're ready, initialize it:

   $ gcloud init

6. Deploy your app:

   gcloud app deploy

You are now running Perl on Google App Engine. How cool is that?

app.yaml

runtime: custom
env: flex
manual_scaling:
  instances: 1

Dockerfile

# Use the latest perl image from dockerhub
FROM perl:latest

# Install the web framework mojolicious
RUN curl -L https://cpanmin.us | perl - -M https://cpan.metacpan.org -n Mojolicious

# Instruct mojolicious to listen on port 8080 and open the port
ENV MOJO_LISTEN http://*:8080
EXPOSE 8080

# add your application code and set the working directory
ADD . /app
WORKDIR /app

# change the permissions and run the application
RUN chmod +x main.pl
CMD ["./main.pl", "daemon"]

main.pl

#!/usr/bin/env perl
use Mojolicious::Lite;

get '/' => sub {
  my $c = shift;

  my %headers;
  {
      my %h = %{$c->req->headers};
      $headers{method} = $c->req->method;
      $headers{url} = $c->req->url;
      for (keys %{$h{headers}}){
          $headers{$_} = join(", ", @{$h{headers}->{$_}});
      }
  }
  $c->render(json => \%headers);
};

app->start;