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The official Airbrake library for Ruby applications
Latest commit 3800f76 May 25, 2016 @kyrylo kyrylo Merge pull request #553 from airbrake/migration-guide-update
Migration guide: clarify the newest blacklisting/whitelisting API


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The Airbrake notifier for Ruby


Airbrake is an online tool that provides robust exception tracking in any of your Ruby applications. In doing so, it allows you to easily review errors, tie an error to an individual piece of code, and trace the cause back to recent changes. The Airbrake dashboard provides easy categorization, searching, and prioritization of exceptions so that when errors occur, your team can quickly determine the root cause.

Looking for the old version?

Airbrake V5 was released on 18th December 2015. Here is a guide for migrating from v4 to v5.

You can find the V4 code here.

Key features

The Airbrake Dashboard

This library is built on top of Airbrake Ruby. The difference between Airbrake and Airbrake Ruby is that the airbrake gem is just a collection of integrations with frameworks or other libraries. The airbrake-ruby gem is the core library that performs exception sending and other heavy lifting.

Normally, you just need to depend on this gem, select the integration you are interested in and follow the instructions for it. If you develop a pure frameworkless Ruby application or embed Ruby and don't need any of the listed integrations, you can depend on the airbrake-ruby gem and ignore this gem entirely.

The list of integrations that are available in this gem includes:

Paying Airbrake plans support the ability to track deployments of your application in Airbrake. We offer several ways to track your deployments:

  • Using Capistrano[link]
  • Using the Rake task[link]



Add the Airbrake gem to your Gemfile:

gem 'airbrake', '~> 5.3'


Invoke the following command from your terminal:

gem install airbrake



Airbrake v5 is already here (but we still support Airbrake v4)

If you are migrating from Airbrake v4, please read our migration guide.

Since the 5th major release of the Airbrake gem we support only Rails 3.2+ and Ruby 1.9+. Don't worry, if you use older versions of Rails or Ruby, just continue using them with Airbrake v4: we still support it. However, v4 is feature frozen. We accept only bugfixes.

In the meantime, consider upgrading to Airbrake v5, as you miss a lot of new features, such as support for multiple Airbrake configurations inside one Rails project (you can report to different Airbrake projects in the same Ruby process), nested exceptions, multiple asynchronous workers support, JRuby's Java exceptions and many more.


To integrate Airbrake with your Rails application, you need to know your project id and project key. Invoke the following command and replace PROJECT_ID and PROJECT_KEY with your values:

rails g airbrake PROJECT_ID PROJECT_KEY

Heroku add-on users can omit specifying the key and the id and invoke the command without arguments (Heroku add-on's environment variables will be used) (Heroku add-on docs):

rails g airbrake

This command will generate the Airbrake configuration file under config/initializers/airbrake.rb. Make sure that this file is checked into your version control system. This is enough to start Airbraking.

In order to configure the library according to your needs, open up the file and edit it. The full list of supported configuration options is available online.

To test the integration, invoke a special Rake task that we provide:

rake airbrake:test

In case of success, a test exception should appear in your dashboard.

The notify_airbrake controller helpers

The Airbrake gem defines two helper methods available inside Rails controllers: #notify_airbrake and #notify_airbrake_sync. If you want to notify Airbrake from your controllers manually, it's usually a good idea to prefer them over Airbrake.notify, because they automatically add information from the Rack environment to notices. #notify_airbrake is asynchronous (immediately returns nil), while #notify_airbrake_sync is synchronous (waits for responses from the server and returns them). The list of accepted arguments is identical to Airbrake.notify.

Additional features: user reporting, sophisticated API

The library sends all uncaught exceptions automatically, attaching the maximum possible amount information that can help you to debug errors. The Airbrake gem is capable of reporting information about the currently logged in user (id, email, username, etc.), if you use an authentication library such as Devise. The library also provides a special API for manual error reporting. The description of the API is available online.

Automatic integration with Rake tasks and Rails runner

Additionally, the Rails integration offers automatic exception reporting in any Rake tasks[link] and Rails runner.


To use Airbrake with Sinatra, simply require the gem, configure it and use our Rack middleware.

# myapp.rb
require 'sinatra/base'
require 'airbrake'

Airbrake.configure do |c|
  c.project_id = 113743
  c.project_key = 'fd04e13d806a90f96614ad8e529b2822'

  # Display debug output.
  c.logger.level = Logger::DEBUG

class MyApp < Sinatra::Base
  use Airbrake::Rack::Middleware

  get('/') { 1/0 }


To run the app, add a file called to the same directory and invoke rackup from your console.

require_relative 'myapp'

That's all! Now you can send a test request to localhost:9292 and check your project's dashboard for a new error.

curl localhost:9292


To send exceptions to Airbrake from any Rack application, simply use our Rack middleware, and configure the default notifier.

require 'airbrake'

Airbrake.configure do |c|
  c.project_id = 113743
  c.project_key = 'fd04e13d806a90f96614ad8e529b2822'

use Airbrake::Rack::Middleware

If you want to append additional information from web requests (such as HTTP headers), define a special hook:

Airbrake.add_rack_builder do |notice, request|
  notice[:params][:remoteIp] = request.env['REMOTE_IP']

request here is a normal Rack request.


We support Sidekiq v2, v3 and v4. The configurations steps for them are identical. Simply require our error handler and you're done:

require 'airbrake/sidekiq/error_handler'

If you required Sidekiq before Airbrake, then you don't even have to require anything manually and it should just work out-of-box.


No additional configuration is needed. Simply ensure that you have configured your Airbrake notifier.


Since Airbrake v5 the gem provides its own failure backend. The old way of integrating Resque doesn't work. If you upgrade to Airbrake v5, just make sure that you require airbrake/resque/failure instead of resque/failure/airbrake. The rest remains the same.

Integrating with Rails applications

If you're working with Resque in the context of a Rails application, create a new initializer in config/initializers/resque.rb with the following content:

# config/initializers/resque.rb
require 'airbrake/resque/failure'
Resque::Failure.backend = Resque::Failure::Airbrake

That's all configuration.

General integration

Any Ruby app using Resque can be integrated with Airbrake. If you can require the Airbrake gem after Resque, then there's no need to require airbrake/resque/failure anymore:

require 'resque'
require 'airbrake'

Resque::Failure.backend = Resque::Failure::Airbrake

If you're unsure, just configure it similar to the Rails approach. If you use multiple backends, then continue reading the needed configuration steps in the Resque wiki (it's fairly straightforward).


Simply require our plugin and you're done:

require 'airbrake/delayed_job/plugin'

If you required DelayedJob before Airbrake, then you don't even have to require anything manually and it should just work out-of-box.


Airbrake offers Rake tasks integration, which is used by our Rails integration[link]. To integrate Airbrake in any project, just require the gem in your Rakefile, if it hasn't been required and configure the default notifier.

# Rakefile
require 'airbrake'

Airbrake.configure do |c|
  c.project_id = 113743
  c.project_key = 'fd04e13d806a90f96614ad8e529b2822'

task :foo do

Plain Ruby scripts

Airbrake supports any type of Ruby applications including plain Ruby scripts. If you want to integrate your script with Airbrake, you don't have to use this gem. The Airbrake Ruby gem provides all the needed tooling.

Deploy tracking

Airbrake has the ability to track your deploys (available only for paid plans).

By notifying Airbrake of your application deployments, all errors are resolved when a deploy occurs, so that you'll be notified again about any errors that reoccur after a deployment. Additionally, it's possible to review the errors in Airbrake that occurred before and after a deploy.

There are several ways to integrate deployment tracking with your application, that are described below.


The library supports Capistrano v2 and Capistrano v3. In order to configure deploy tracking with Capistrano simply require our integration from your Capfile:

# Capfile
require 'airbrake/capistrano/tasks'

If you use Capistrano 3, define the after :finished hook, which executes the deploy notification task (Capistrano 2 doesn't require this step).

# config/deploy.rb
namespace :deploy do
  after :finished, 'airbrake:deploy'

If you version your application, you can set the :app_version variable in config/deploy.rb, so that information will be attached to your deploy.

# config/deploy.rb
set :app_version, '1.2.3'

Rake task

A Rake task can accept several arguments shown in the table below:

Key Required Default Example
ENVIRONMENT No Rails.env production
USERNAME No nil john
REVISION No nil 38748467ea579e7ae64f7815452307c9d05e05c5
VERSION No nil v2.0

In Rails

Simply invoke rake airbrake:deploy and pass needed arguments:

rake airbrake:deploy USERNAME=john ENVIRONMENT=production REVISION=38748467 REPOSITORY=


Make sure to require the library Rake integration in your Rakefile.

# Rakefile
require 'airbrake/rake/tasks'

Then, invoke it like shown in the example for Rails.

Supported Rubies

  • CRuby >= 1.9.2
  • JRuby >= 1.9-mode
  • Rubinius >= 2.2.10


In case you have a problem, question or a bug report, feel free to:


The project uses the MIT License. See for details.

Development & testing

In order to run the test suite, first of all, clone the repo, and install dependencies with Bundler.

git clone
cd airbrake

Next, run unit tests.

bundle exec rake

In order to test integrations with frameworks and other libraries, install their dependencies with help of the following command:

bundle exec appraisal install

To run integration tests for a specific framework, use the appraisal command.

bundle exec appraisal rails-4.2 rake spec:integration:rails
bundle exec appraisal sinatra rake spec:integration:sinatra

Pro tip: circle.yml has the list of all integration tests and commands to invoke them.

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