OpenTelemetry

This SDK produces metrics using OpenTelemetry that allow you to view data such as request timings. These metrics also include attributes for the model and store ID, as well as the API called to allow you to build reporting.

When an OpenTelemetry SDK instance is configured, the metrics will be exported and sent to the collector configured as part of your applications configuration. If you are not using OpenTelemetry, the metric functionality is a no-op and the events are never sent.

In cases when metrics events are sent, they will not be viewable outside of infrastructure configured in your application, and are never available to the OpenFGA team or contributors.

Metrics

Supported Metrics

Metric Name	Type	Enabled by Default	Description
fga-client.request.duration	Histogram	Yes	Total request time for FGA requests, in milliseconds
fga-client.query.duration	Histogram	Yes	Time taken by the FGA server to process and evaluate the request, in milliseconds
fga-client.credentials.request	Counter	Yes	Total number of new token requests initiated using the Client Credentials flow

Supported Attributes

Attribute Name	Type	Enabled by Default	Description
fga-client.request.client_id	string	Yes	Client ID associated with the request, if any
fga-client.request.method	string	Yes	FGA method/action that was performed (e.g., Check, ListObjects) in TitleCase
fga-client.request.model_id	string	Yes	Authorization model ID that was sent as part of the request, if any
fga-client.request.store_id	string	Yes	Store ID that was sent as part of the request
fga-client.response.model_id	string	Yes	Authorization model ID that the FGA server used
fga-client.user	string	No	User associated with the action of the request for check and list users
http.client.request.duration	int	No	Duration for the SDK to complete the request, in milliseconds
http.host	string	Yes	Host identifier of the origin the request was sent to
http.request.method	string	Yes	HTTP method for the request
http.request.resend_count	int	Yes	Number of retries attempted, if any
http.response.status_code	int	Yes	Status code of the response (e.g., 200 for success)
http.server.request.duration	int	No	Time taken by the FGA server to process and evaluate the request, in milliseconds
url.scheme	string	Yes	HTTP scheme of the request (http/https)
url.full	string	Yes	Full URL of the request
user_agent.original	string	Yes	User Agent used in the query

Customizing Reporting

To control which metrics and attributes are reported by the SDK, you can provide your own TelemetryConfiguration instance during initialization, as shown in the example above. The TelemetryConfiguration class allows you to configure the metrics and attributes that are reported by the SDK, as outlined in the tables above.

Usage

1. Install Dependencies

Install the OpenFGA SDK and OpenTelemetry SDK in your application using pip:

go get "github.com/openfg/go-sdk" \
  "go.opentelemetry.io/otel" \
  "go.opentelemetry.io/otel/sdk/metric"

You must also install an OpenTelemetry exporter; for example, the OTLP gRPC exporter:

go get "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc"

2. Configure OpenTelemetry

Configure your application to use OpenTelemetry, and set up the metrics provider to export metrics using an exporter:

package main

import (
	"context"
	"errors"
	"time"

	"go.opentelemetry.io/otel"
	"go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc"
	"go.opentelemetry.io/otel/sdk/metric"
)

// Configure OpenTelemetry
metricExporter, _ := otlpmetricgrpc.New(ctx, otlpmetricgrpc.WithGRPCConn(conn))

meterProvider := sdkmetric.NewMeterProvider(
  sdkmetric.WithReader(sdkmetric.NewPeriodicReader(metricExporter)),
  sdkmetric.WithResource(res),
)
otel.SetMeterProvider(meterProvider)
defer meterProvider.Shutdown()

3. Configure OpenFGA

Configure the OpenFGA client, and (optionally) customize what metrics and attributes are reported:

import (
  "github.com/openfga/go-sdk/client"
  "os"
)

fgaClient, err := NewSdkClient(&ClientConfiguration{
  ApiUrl:  os.Getenv("FGA_API_URL"), // required, e.g. https://api.fga.example
  StoreId: os.Getenv("FGA_STORE_ID"), // not needed when calling `CreateStore` or `ListStores`
  AuthorizationModelId: os.Getenv("FGA_MODEL_ID"), // optional, recommended to be set for production
  Telemetry: &telemetry.Configuration{
    Metrics: &telemetry.MetricsConfiguration{
      METRIC_HISTOGRAM_REQUEST_DURATION: &telemetry.MetricConfiguration{
        ATTR_FGA_CLIENT_REQUEST_CLIENT_ID: &telemetry.AttributeConfiguration{Enabled: true},
        ATTR_HTTP_RESPONSE_STATUS_CODE:    &telemetry.AttributeConfiguration{Enabled: true},
      }
    }
  }
})

Example Integration

An example integration is provided that also demonstrates how to configure an application with OpenFGA and OpenTelemetry. Please refer to the README for more information.