Rails Runner Instrumentation

[allcentury]

We run a lot of cronjobs via:

bundle exec rails runner bin/my_runner.rb

However, I'm unable to find these traces in APM. Do we need to manually set up the tracing or is there integration instrumentation that we missed?

If these aren't automatically picked up, I think this is a common enough execution method that others would want it.

Config:

Datadog.configure do |c|
  if !%w[development test].include?(Rails.env) || ENV["DD_AGENT_DISABLE_TRACING"]
    c.runtime_metrics_enabled = true
    c.analytics_enabled = true

    c.use :rails, service_name: app_name
    c.use :active_model_serializers, service_name: "#{app_name}-active-model-serializers"
    c.use :aws, service_name: "#{app_name}-aws"
    c.use :concurrent_ruby, service_name: "#{app_name}-concurrent-ruby"
    c.use :faraday, service_name: "#{app_name}-faraday"
    c.use :racecar, service_name: "#{app_name}-racecar"
    c.use :rake, service_name: "#{app_name}-rake"
    c.use :redis, service_name: "#{app_name}-redis"
    c.use :shoryuken, service_name: "#{app_name}-shoryuken"
    c.tracer hostname: config[:apm][:host], port: config[:apm][:port]
    c.runtime_metrics statsd: STATSD_NO_NAMESPACE
  end
end

[marcotc]

👋 @allcentury, thank you for reporting this issue.

We don't currently have first-class support for instrumenting Rails Runner executions.
We have plans to spend more time improving our Rails instrumentation, so I'll make sure to capture the Runner instrumentation in that effort.

Meanwhile, your only solution is to perform manual instrumentation at your entry points.