If you also want to add logrotate (e.g. remove logs that are older than a week) in addition to saving logs by date, you can add the following code:
var fs = require('fs');
var path = require("path");
var CronJob = require('cron').CronJob;
var _ = require("lodash");
var logger = require("./logger");
var job = new CronJob('00 00 00 * *', function(){
// Runs every day
// at 00:00:00 AM.
fs.readdir(path.join("/var", "log", "ironbeast"), function(err, files){
if(err){
logger.error("error reading log files");
} else{
var currentTime = new Date();
var weekFromNow = currentTime -
(new Date().getTime() - (7 * 24 * 60 * 60 * 1000));
_(files).forEach(function(file){
var fileDate = file.split(".")[2]; // get the date from the file name
if(fileDate){
fileDate = fileDate.replace(/-/g,"/");
var fileTime = new Date(fileDate);
if((currentTime - fileTime) > weekFromNow){
console.log("delete fIle",file);
fs.unlink(path.join("/var", "log", "ironbeast", file),
function (err) {
if (err) {
logger.error(err);
}
logger.info("deleted log file: " + file);
});
}
}
});
}
});
}, function () {
// This function is executed when the job stops
console.log("finished logrotate");
},
true, /* Start the job right now */
'Asia/Jerusalem' /* Time zone of this job. */
);
where my logger file is:
var path = require("path");
var winston = require('winston');
var logger = new winston.Logger({
transports: [
new winston.transports.DailyRotateFile({
name: 'file#info',
level: 'info',
filename: path.join("/var", "log", "MY-APP-LOGS", "main.log"),
datePattern: '.MM--dd-yyyy'
}),
new winston.transports.DailyRotateFile({
name: 'file#error',
level: 'error',
filename: path.join("/var", "log", "MY-APP-LOGS", "error.log"),
datePattern: '.MM--dd-yyyy',
handleExceptions: true
})
]});
module.exports = logger;
