aws-xray-go

README

Go SDK for AWX X-Ray

SDK for instrumenting Go applications for AWS X-Ray

AWS X-Ray

More information about AWS X-Ray can be found at the product website.

Getting Started

Client Example

The outbound request is traced

import "github.com/goguardian/aws-xray-go/xray"

func main() {
	ctx := xray.NewContext("service-name", nil)
	defer xray.Close(ctx)

	http := xray.GetHTTPClient(ctx)
	http.Get("http://127.0.0.1:3000")
}

Server Example

All inbound requests will be traced

import (
	"log"
	"net/http"
	"github.com/goguardian/aws-xray-go/xray"
)

func main() {
	http.HandleFunc("/", xray.Middleware("service-name", handler))
	http.ListenAndServe(":3000", nil)
}

func handler(w http.ResponseWriter, r *http.Request) {
	w.Write([]byte("hiya"))
}

Sampling

The sampling configuration can be modified using xray.SetSampler. The default settings are to sample all of the first ten requests of any second and five percent of all other requests that second.

import "github.com/goguardian/aws-xray-go/xray"

func example() {
	fixedTarget := 10 // First ten requests per second
	fallbackRate := 0.05 // Five percent of all other requests
	xray.SetSampler(fixedTarget, fallbackRate)
}