This gem will allow you to check the status of all your external dependencies, e.g. url, database, etc

Add this line to your application's Gemfile:

gem 'doctor'

And then execute:

$ bundle

Or install it yourself as:

$ gem install doctor

First, you need to create a file named $YOUR_PROJECT/config/initializers/doctor.rb. Your file should look like:

#one active record per connection is fine
Doctor::ConfigManager.active_record_list.concat [DogActiveRecord, Legacy::CatAnotherDatabase]

#urls that we will do a telnet
Doctor::ConfigManager.url_to_telnet_list.concat [
  {name: 'uaiHebert', host: 'uaihebert.com'},
  {name: 'Paypal', host: 'api.paypal.com', port: 443}
]

# HD that will be checked
Doctor::ConfigManager.directory_list.concat [
  {name: 'uaiHd' , path: '/uaiDrive', alarm_if_less_than: 40}
]

To see the health check status, access the following URL: http://YOUR_PROJECT/doctor/health_check

A JSON like this will appear:

{
   "telnets":[
       {
         "name":"uaiHebert",
         "host":"uaihebert.com",
         "port":80,
         "timeout":1,
         "wait_time":1,
         "status":"ok"
      },
      {
         "name":"Paypal",
         "host":"api.paypal.com",
         "port":443,
         "timeout":1,
         "wait_time":1,
         "status":"ok"
      }
   ],
   "databases":[
      {
         "status":"ok",
         "active_record":"DogActiveRecord"
      },
      {
         "status":"error",
         "active_record":"Legacy::CatAnotherDatabase",
         "error_message":"Can't connect to MySQL server on '127.0.0.1' (111)"
      }
   ],
   "hds":[
      {
         "name":"uaiHd",
         "path":"/uaiDrive",
         "alarm_if_less_than":40,
         "status":"ok"
      }
   ]
}

About the json:

• every time that an error is deteced, the returned http status will be 500
• In case of error "status" : "error" you will find the attribute "error_message":"error text..." with the error text
• Notice that with the telnet url some default values were added. You can override them in your doctor.rb class, e.g. : {name: 'uaiHebert', host: 'uaihebert.com', timeout: 2}

https://github.com/estantevirtual/doctor/wiki/Road-Map

After checking out the repo, run bin/setup to install dependencies. You can also 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, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Bug reports and pull requests are welcome on GitHub at https://github.com/estantevirtual/doctor. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.

The gem is available as open source under the terms of the MIT License.