Go Agent now supports distributed tracing
Distributed tracing lets you see the path that a request takes as it travels through your distributed system. By showing the distributed activity through a unified view, you can troubleshoot and understand a complex system better than ever before.
Distributed tracing is available with an APM Pro or equivalent subscription. To see a complete distributed trace, you need to enable the feature on a set of neighboring services. Enabling distributed tracing changes the behavior of some New Relic features, so carefully consult the transition guide before you enable this feature.
To enable distributed tracing, set the following fields in your config. Note that distributed tracing and cross application tracing cannot be used simultaneously.
config := newrelic.NewConfig("Your Application Name", "__YOUR_NEW_RELIC_LICENSE_KEY__")config.CrossApplicationTracer.Enabled = falseconfig.DistributedTracer.Enabled = true
Please refer to the distributed tracing section of the guide for more detail on how to ensure you get the most out of the Go agent's distributed tracing support.
New distributed trace calls/functions
Added functions NewContext and FromContext for adding and retrieving the Transaction from a Context. Handlers instrumented by WrapHandle, WrapHandleFunc, and nrgorilla.InstrumentRoutes may use FromContext on the request's context to access the Transaction. Thanks to @caarlos0 for the contribution! Though NewContext and FromContext require Go 1.7+ (when context was added), RequestWithTransactionContext is always exported so that it can be used in all framework and library instrumentation.