OpenTelemetry ActionView Instrumentation

The ActionView instrumentation is a community-maintained instrumentation for the ActionView portion of the Ruby on Rails web-application framework.

How do I get started?

Install the gem using:

gem install opentelemetry-instrumentation-action_view
gem install opentelemetry-instrumentation-rails

Or, if you use bundler, include opentelemetry-instrumentation-action_view in your Gemfile.


To use the instrumentation, call use with the name of the instrumentation:

OpenTelemetry::SDK.configure do |c|
  c.use 'OpenTelemetry::Instrumentation::Rails'
  c.use 'OpenTelemetry::Instrumentation::ActionView'

Alternatively, you can also call use_all to install all the available instrumentation.

OpenTelemetry::SDK.configure do |c|


Example usage can be seen in the ./example/ file here

Known issues

ActionView instrumentation uses ActiveSupport notifications and in the case when a subscriber raises in start method an unclosed span would break successive spans ends. Example:

class CrashingEndSubscriber
  def start(name, id, payload)
    raise 'boom'

  def finish(name, id, payload) end


How can I get involved?

The opentelemetry-instrumentation-action_view gem source is on github, along with related gems including opentelemetry-api and opentelemetry-sdk.

The OpenTelemetry Ruby gems are maintained by the OpenTelemetry-Ruby special interest group (SIG). You can get involved by joining us in GitHub Discussions or attending our weekly meeting. See the meeting calendar for dates and times. For more information on this and other language SIGs, see the OpenTelemetry community page.


The opentelemetry-instrumentation-action_view gem is distributed under the Apache 2.0 license. See LICENSE for more information.