NodeJS - how to write to a file all the console.log?

Question

On my CentOS 7.x server I am running Node (v6.7.0 and v0.10.36).

forever start /home/www/html/server/mynode.js

which runs following:

/usr/bin/node /home/www/html/server/mynode.js

CODE of mynode.js:

var http = require('http');
var net = require('net');
var url = require('url');
var io = require('socket.io').listen(3004);
io.set('log level', 1);

io.sockets.on('connection', function (socket) {
  socket.on('disconnect', function () {
    try{
      console.log(JSON.stringify(db));           
    } catch(dis) {
      console.log(dis);
    }

  });
});

How do i tell NodeJS or Linux to keep log? So that i can listen whats going on by tail -f /var/log/mynode.log ?

Answer 1

You can overwrite your console.log

var fs = require('fs');

var trueLog = console.log;
console.log = function(msg) {
    fs.appendFile("/tmp/log.log", msg, function(err) {
        if(err) {
            return trueLog(err);
        }
    });
    //trueLog(msg); //uncomment if you want logs
}

Just put this snippet on top of your nodejs code.