The LightStep distributed tracing library for Ruby


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The LightStep distributed tracing library for Ruby.


Add this line to your application's Gemfile:

gem 'lightstep'

And then execute:

$ bundle

Or install it yourself as:

$ gem install lightstep

Getting started

require 'lightstep'

# Initialize the singleton tracer
LightStep.configure(component_name: 'lightstep/ruby/example', access_token: 'your_access_token')

# Create a basic span and attach a log to the span
span = LightStep.start_span('my_span')
span.log(event: 'hello world', count: 42)

# Create a child span (and add some artificial delays to illustrate the timing)
child = LightStep.start_span('my_child', child_of: span.span_context)

Thread Safety

The LightStep Tracer is threadsafe. For increased performance, you can add the concurrent-ruby-ext gem to your Gemfile. This will enable C extensions for concurrent operations.

The LightStep Tracer is also Fork-safe. When forking, the child process will not inherit the unflushed spans of the parent, so they will only be flushed once.


After checking out the repo, run bin/setup to install dependencies. Then, run make test to run the tests.

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