ERROR -- ddtrace: [ddtrace] (/usr/local/bundle/gems/ddtrace-0.36.0/lib/ddtrace/transport/http/client.rb:35:in rescue in send_request') Internal error during HTTP transport request. Cause: Failed to open TCP connection to 127.0.0.1:8126 (Connection refused - connect(2) for "127.0.0.1" port 8126) Location: /usr/local/lib/ruby/2.5.0/net/http.rb:939:in rescue in block in connect'

def configure_tracer(config)
  config.tracer          = ::Datadog::Tracer.new
  config.tracer.enabled  = true
  config.tracer.hostname = tracer_params[:hostname]
  config.tracer.port     = tracer_params[:port]
  config.tracer.env      = tracer_params[:env] if config.tracer.respond_to?(:env=)
  config.tracer.transport_options = proc do |t|
    # Hostname, port, and additional options. :timeout is in seconds.
    t.adapter :net_http, tracer_params[:hostname], tracer_params[:port], { timeout: tracer_params[:timeout] }
  end
end

If I do a puts on tracer_params[:hostname] it is set to datadog-agent.datadog but somehow something is still trying to push to 127.0.0.1.

Another weird thing is that unless I set the tracer = the tracer is nil. I am currently on version 0.36.0 of the gem.