Instrument Ruby apps for Error Reporting

You can send error reports to Error Reporting from Ruby applications by using the Error Reporting library for Ruby.

Error Reporting is integrated with some Google Cloud services, such as App Engine, Compute Engine, and Google Kubernetes Engine. Error Reporting displays the errors that are logged to Cloud Logging by applications running on those services. For more information, go to Running on Google Cloud Platform on this page.

You can also send error data to Error Reporting using Logging. For information on the data formatting requirements, read Formatting error messages in Logging.

Before you begin

1. Sign in to your Google Cloud account. If you're new to Google Cloud, create an account to evaluate how our products perform in real-world scenarios. New customers also get $300 in free credits to run, test, and deploy workloads.

2. In the Google Cloud console, on the project selector page, select or create a Google Cloud project.

   Note: If you don't plan to keep the resources that you create in this procedure, create a project instead of selecting an existing project. After you finish these steps, you can delete the project, removing all resources associated with the project.

   Go to project selector

3. Make sure that billing is enabled for your Cloud project. Learn how to check if billing is enabled on a project.

4. Enable the Error Reporting API .

   Enable the API

5. In the Google Cloud console, on the project selector page, select or create a Google Cloud project.

   Note: If you don't plan to keep the resources that you create in this procedure, create a project instead of selecting an existing project. After you finish these steps, you can delete the project, removing all resources associated with the project.

   Go to project selector

6. Make sure that billing is enabled for your Cloud project. Learn how to check if billing is enabled on a project.

7. Enable the Error Reporting API .

   Enable the API

8. Install Ruby 2.2+ or greater.

Installing the client library

Error Reporting library for Ruby lets you monitor and view errors reported by Ruby applications running nearly anywhere.

1. Add the google-cloud-error_reporting gem to your Gemfile:

   gem "google-cloud-error_reporting"

2. Use Bundler to install the gem:

   bundle install

Enabling the library

If you're using Ruby on Rails, Bundler automatically loads the library into your application when it starts.

Other Rack-based applications can use the Rack Middleware provided by the library:

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require "google/cloud/error_reporting"

use Google::Cloud::ErrorReporting::Middleware

For more information on installation, read the documentation for the Error Reporting library for Ruby. You can also report issues using the issue tracker.

Configuring the client library

You can customize the behavior of the Error Reporting library for Ruby. See the library's configuration for a list of possible configuration options.

Reporting errors

Reporting errors in Rack-based frameworks

The Error Reporting library for Ruby makes it easy to integrate Error Reporting into popular Rack-based Ruby web frameworks such as Ruby on Rails and Sinatra. When the library is enabled, it automatically reports exceptions captured from the application's Rack stack.

Reporting errors manually

You can manually report an error by calling the report method, as seen in the following example:

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require "google/cloud/error_reporting"

begin
  raise "Raise an exception for Error Reporting."
rescue StandardError => e
  Google::Cloud::ErrorReporting.report e
end

Running on Google Cloud

Using the Error Reporting library for Ruby requires the Identity and Access Management Error Reporting Writer role. Most Google Cloud computing platforms provide this role by default.

You can configure Error Reporting for Ruby on the following Google Cloud environments.

App Engine flexible environment

App Engine grants the Error Reporting Writer role by default.

The Error Reporting library for Ruby can be used without needing to explicitly provide credentials.

Error Reporting is automatically enabled for App Engine flexible environment applications. No additional setup is required.

Note: Error logs written to stderr are processed automatically by Error Reporting, without needing to use the Error Reporting library for Ruby directly.

Google Kubernetes Engine

On GKE, you must add the cloud-platform access scope when creating the cluster, as the following example command shows:

gcloud container clusters create example-cluster-name --scopes https://www.googleapis.com/auth/cloud-platform

Compute Engine

When using Compute Engine VM instances, add the cloud-platform access scope to each instance. When creating a new instance through the Google Cloud console, you can do this in the Identity and API access section of the Create Instance panel. Use the Compute Engine default service account or another service account of your choice, and select Allow full access to all Cloud APIs in the Identity and API access section. Whichever service account you select, ensure that it has been granted the Error Reporting Writer role in the IAM & admin section of the Google Cloud console.

Running locally and elsewhere

To use the Error Reporting library for Ruby outside of Google Cloud, including running the library on your own workstation, on your data center's computers, or on the VM instances of another cloud provider, you must supply your Google Cloud project ID and appropriate service account credentials directly to the Error Reporting library for Ruby.

You can create and obtain service account credentials manually. When specifying the Role field, use the Error Reporting Writer role. For more information on Identity and Access Management roles, go to Access control guide.

Using Ruby on Rails configuration interface

To use the Error Reporting library for Ruby with the Ruby on Rails framework, provide the parameters through the Ruby on Rails configuration interface:

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# Add this to config/environments/*.rb
Rails.application.configure do |config|
  # Stackdriver Error Reporting specific parameters
  config.google_cloud.error_reporting.project_id = "YOUR-PROJECT-ID"
  config.google_cloud.error_reporting.keyfile    = "/path/to/service-account.json"
end

You can also set shared configuration for all Stackdriver gems using the following:

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# Add this to config/environments/*.rb
Rails.application.configure do |config|
  # Stackdriver Shared parameters
  config.google_cloud.project_id = "YOUR-PROJECT-ID"
  config.google_cloud.keyfile    = "/path/to/service-account.json"
end

Error Reporting is enabled by default when Rails is running in production mode. To enable Error Reporting in development mode, add the following:

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# Add this to config/environments/development.rb
Rails.application.configure do |config|
  config.google_cloud.use_error_reporting = true
end

Using instrumentation configuration interface

To use the Error Reporting library for Ruby in other Rack-based applications, provide the parameters through the configuration interface:

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require "google/cloud/error_reporting"

Google::Cloud.configure do |config|
  # Stackdriver Error Reporting specific parameters
  config.error_reporting.project_id = "YOUR-PROJECT-ID"
  config.error_reporting.keyfile    = "/path/to/service-account.json"
end

You can also set shared configuration for all Google Cloud's operations suite gems using the following:

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require "stackdriver"

Google::Cloud.configure do |config|
  # Stackdriver Shared parameters
  config.project_id = "YOUR-PROJECT-ID"
  config.keyfile    = "/path/to/service-account.json"
end

Viewing error reports

After deployment, you can view error reports in the Google Cloud console Error Reporting dashboard.

Go to the Error Reporting dashboard

For more information, see Viewing Errors.