How to delete files from winston log after certain days limit?

Question

I am using winston to log files into server that is working as expected , now i want to set days limit , Lets say after 3 days i want to delete files that are logged 3 days ago , is it possible to achieve using winston rotation ?

main.js

 winston.add(winston.transports.File, {
        filename: './Logs/server.log',
        maxsize:'15000',
        timestamp:false
    });

Answer 1

You can use Winston daily rotate for this.

Short answer: Yes, you can do that by adding maxFiles:3d in transport option.

• If you do not set the maxFiles, no log file will be deleted.

• If you set maxFiles:3d, it will delete all log files created in the last 3 days.

• If you set maxFiles:3, it will delete log files when it exceeds more than 3.

Note: You can archive files before deleting by using zippedArchive: true, if not set the logs files will be deleted without any backup. Till now, I didn't get any way to auto-delete zip files.

Sample setup:

  require('winston-daily-rotate-file');

  var transport = new (winston.transports.DailyRotateFile)({
    filename: 'application-%DATE%.log',
    datePattern: 'YYYY-MM-DD-HH',
    zippedArchive: true,
    maxSize: '20m',
    maxFiles: '14d'
  });

  transport.on('rotate', function(oldFilename, newFilename) {
    // do something fun
  });

  var logger = winston.createLogger({
    transports: [
      transport
    ]
  });

  logger.info('Hello World!');```