Go Chi OpenTelemetry Integration Guide

Installation

Install the APIToolkit chi SDK using the following command go get command:

go get github.com/apitoolkit/apitoolkit-go/chi

Configuration

Before configuration open telemetery and setting up the APItoolkit middleware, you need to configure a few environment variables. These variables provide essential information for setting up openTelemetry and APItoolkit.

OTEL_RESOURCE_ATTRIBUTES="at-project-key=YOUR_API_KEY" # Your apitoolkit API key
OTEL_SERVICE_NAME="apitoolkit-otel-go-demo" # Service name for your the service you're integrating in
OTEL_SERVICE_VERSION="0.0.1" # Your application's service version

Usage

After setting up the environment variables, you can configure the OpenTelemetry SDK and APItoolkit middleware like so:

package main

import (
	"log"

	apitoolkit "github.com/apitoolkit/apitoolkit-go/chi"
	"github.com/go-chi/chi/v5"
  _ "github.com/joho/godotenv/autoload" // autoload .env file for otel configuration
)

func main() {
  // Configure OpenTelemetry
	shutdown, err := apitoolkit.ConfigureOpenTelemetry()
	if err != nil {
		log.Printf("error configuring openTelemetry: %v", err)
	}
	defer shutdown()

  r := chi.NewRouter()
	// Add the apitoolkit chi middleware to monitor http requests
	// And report errors to apitoolkit
	r.Use(apitoolkit.Middleware(apitoolkit.Config{
		Debug:               false,
		ServiceName:         "example-chi-server",
		ServiceVersion:      "0.0.1",
		Tags:                []string{"env:dev"},
		CaptureRequestBody:  true,
		CaptureResponseBody: true,
		RedactHeaders:       []string{"Authorization", "X-Api-Key"},
		RedactRequestBody:   []string{"password", "credit_card"},
		RedactResponseBody:  []string{"password", "credit_card"},
	}))

	r.Get("/", func(w http.ResponseWriter, r *http.Request) {
		w.Write([]byte("Hello, world!"))
	})

	http.ListenAndServe(":8000", r)
}

All Middleware Configuration Fields

The middleware configuration specifies how the APItoolkit SDK should handle requests and responses. Below are the available fields:

Field Name	Type	Description	Default Value	Example
`Debug`	`bool`	Enable detailed logs during development	`false`	`true`
`ServiceName`	`string`	Name of the service being monitored	-	`"example-chi-server"`
`ServiceVersion`	`string`	Version of the service	-	`"0.0.1"`
`Tags`	`[]string`	Additional tags for contextual information	`[]`	`[]string{"env:dev", "team:backend"}`
`CaptureRequestBody`	`bool`	Enable capturing of request body	`false`	`true`
`CaptureResponseBody`	`bool`	Enable capturing of response body	`false`	`true`
`RedactHeaders`	`[]string`	List of headers to redact	`[]`	`[]string{"Authorization", "X-Api-Key"}`
`RedactRequestBody`	`[]string`	JSONPath list of request body fields to redact	`[]`	`[]string{"$.password", "$.credit_card"}`
`RedactResponseBody`	`[]string`	JSONPath list of response body fields to redact	`[]`	`[]string{"$.password", "$.credit_card"}`

Tips

Remember to keep your APIToolkit project key (at-project-key) secure and not expose it in public repositories or logs.