MCG

MCG is a web daemon that automatically generate file from template and execute commands for web services deployed on Apache Mesos and Marathon.

Installation

Add this line to your application's Gemfile:

gem 'mcg'

And then execute:

$ bundle

Or install it yourself as:

$ gem install mcg

Usage

Create configuration file like this exemple: 

{
    "bind": "127.0.0.1",
    "port": 8000,
    "marathon": "http://localhost:8080",
    "host": "http://127.0.0.1:8000/callback",
    "actions": {
        "apache": {
            "template": "/etc/mgc/apache-template.conf.erb",
            "output": "/etc/apache2/sites-enabled/all_site",
            "reload_command": "apachectl -t && apachectl graceful"
        }
    }
}

and template like this exemple: 

<% @data.tasks.each do |name, conf| %>
# Generated configuration for <%= name %>

<VirtualHost *:80>
    ServerAdmin [email protected]
    ServerName <%= name %>

    ProxyRequests Off
    ProxyPreserveHost On
    SetEnv proxy-sendcl 1

    <Proxy balancer://<%= name.gsub(/[\.-]/, '_') %>>
        <% conf.each do |c| %>
        BalancerMember <%= c[:host] %>:<%= c[:port] %>
        <% end %>
    </Proxy>

    ProxyPass / balancer://<%= name.gsub(/[\.-]/, '_') %>/
    ProxyPassReverse / balancer://<%= name.gsub(/[\.-]/, '_') %>/

</VirtualHost>
<% end %>

and start the daemon like this: 

mcg -f conf.json

Development

After checking out the repo, run bin/setup to install dependencies. Then, run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release to create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Contributing

  1. Fork it ( https://github.com/pojer-s/mcg/fork )
  2. Create your feature branch (git checkout -b my-new-feature)
  3. Commit your changes (git commit -am 'Add some feature')
  4. Push to the branch (git push origin my-new-feature)
  5. Create a new Pull Request