Winston: how to rotate logs

node.js flatiron.js
Sparky1 picture Sparky1 · Jul 10, 2012 · Viewed 46.8k times · Source

How can I rotate logs when using Winston to handle logging for node.js. That is, how can I create a new file for each day the app runs?

    var logger = new (winston.Logger)({
       transports: [
          new (winston.transports.Console)(),
          new (winston.transports.File)({ filename: '2012-07-09.log' })
      ]
});

logger.log('info', 'Test Log Message', { anything: 'This is metadata' });

Answer

indexzero picture indexzero · Jul 10, 2012

winston author and maintainer here.

Logging to a new file everyday is currently an open feature request: https://github.com/flatiron/winston/issues/10. Would love to see someone implement it.

That said, there are other options:

  1. The File transport accepts a maxsize option which will rotate the logfile when it exceeds a certain size in bytes.

  2. There is also an open pull-request with a new transport I haven't had a chance to really dig into "fileRotate", which it seems does this kind of date-based rotation: https://github.com/flatiron/winston/pull/120/files

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