Go Fiber OpenTelemetry Integration Guide

Installation

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

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

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/fiber"
	"github.com/gofiber/fiber/v2"
  _ "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()

	app := fiber.New()
	// Register APItoolkit's middleware
	app.Use(apitoolkit.Middleware(apitoolkit.Config{
		RedactHeaders:       []string{"Authorization", "X-Api-Key"}, // Example headers to redact
		RedactRequestBody:   []string{"$.password", "$.account.credit_card"}, // Example request body fields to redact (in jsonpath)
		RedactResponseBody:  []string{"$.password", "$.user.credit_card"}, // Example response body fields to redact (in jsonpath)
	}))

	// Define a route for Hello World
	app.Get("/", func(c *fiber.Ctx) error {
		return c.JSON(fiber.Map{
			"message": "Hello, World!",
		})
	})

	app.Listen(":3000")
}

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.