@opentelemetry/instrumentation-fs

OpenTelemetry fs Instrumentation for Node.js

This module provides automatic instrumentation for the fs module, which may be loaded using the @opentelemetry/sdk-trace-node package and is included in the @opentelemetry/auto-instrumentations-node bundle.

If total installation size is not constrained, it is recommended to use the @opentelemetry/auto-instrumentations-node bundle with @opentelemetry/sdk-node for the most seamless instrumentation experience.

Compatible with OpenTelemetry JS API and SDK 1.0+.

See the full list of instrumented functions in constants.ts;

Installation

npm install --save @opentelemetry/instrumentation-fs

Usage

const { NodeTracerProvider } = require('@opentelemetry/sdk-trace-node');
const { FsInstrumentation } = require('@opentelemetry/instrumentation-fs');
const { registerInstrumentations } = require('@opentelemetry/instrumentation');

const provider = new NodeTracerProvider();
provider.register();

registerInstrumentations({
  instrumentations: [
    new FsInstrumentation({
      // see below for available configuration
    }),
  ],
});

Instrumentation Options

You can set the following:

Options	Type	Description
createHook	(functionName: FMember | FPMember, info: { args: ArrayLike<unknown> }) => boolean	Hook called before creating the span. If false is returned this and all the sibling calls will not be traced.
endHook	( functionName: FMember | FPMember, info: { args: ArrayLike<unknown>; span: api.Span } ) => void	Function called just before the span is ended. Useful for adding attributes.
requireParentSpan	boolean	Require parent to create fs span, default when unset is false.

Useful links

• For more information on OpenTelemetry, visit: https://opentelemetry.io/
• For more about OpenTelemetry JavaScript: https://github.com/open-telemetry/opentelemetry-js
• For help or feedback on this project, join us in GitHub Discussions

License

Apache 2.0 - See LICENSE for more information.