This gem provides auto-instrumentation for the MongoDB Ruby Driver by subscribing to Monitoring notifications.

Supported Versions

  • MRI 2.0 and newer
  • mongo 2.1 and newer


Add this line to your application's Gemfile:

gem 'mongodb-instrumentation'

And then execute:

$ bundle

Or install it yourself as:

$ gem install mongodb-instrumentation


To enable instrumentation, simply add this line of code:

require 'mongodb/instrumentation'


The instrument method optionally takes a tracer argument to explicitly set the tracer to use. If not provided, the instrumentation will default to the OpenTracing global tracer.


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

Unit tests

Run the RSpec tests with

bundle exec rspec


Bug reports and pull requests are welcome on GitHub at


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