fastify-winston

Install

npm i fastify-winston winston

Usage

Compatibility

• v1.x supports fastify@4
• v2.x supports fastify@5

import fastify from "fastify";
import fastifyWinston from "fastify-winston";

// Fastify v5: use loggerInstance
const app = fastify({
  loggerInstance: fastifyWinston({ pretty: true }),
});

app.log.info("hello world");
await app.listen({ port: 3000 });

Fastify v4

import fastify from "fastify";
import fastifyWinston from "fastify-winston";

const app = fastify({
  logger: fastifyWinston({ pretty: true }),
});

app.log.info("hello world");
await app.listen({ port: 3000 });

Use an existing Winston instance

import fastify from "fastify";
import { createLogger, format, transports } from "winston";
import fastifyWinston from "fastify-winston";

const win = createLogger({
  levels: { fatal: 0, error: 1, warn: 2, info: 3, debug: 4, trace: 5, silent: 6 },
  format: format.combine(format.splat(), format.timestamp(), format.json()),
  transports: new transports.Console(),
});

const app = fastify({
  loggerInstance: fastifyWinston(win),
});

app.log.info("hello from external winston");
await app.listen({ port: 3000 });

License

Licensed under MIT.