arklogger

Logger

Framework logger for ark team purposes. Based on bunyan library.

Features:

• lightweight and flexible
• support logging to: console, file, logstash and any stream
• all features of bunyan

Warning:

If stream logstash is used with pubsub queue (cfg.pubsub set to true) - app will not exit correctly (socket is still open). You should close socket manually (logstashstream.redis.end()): https://github.com/mranney/node_redis#clientend

Usage:

First, load library in your app

var Logger = require('logger');

Second, init logging function with one of this methods:

1) Init by config

// all fields are optional except "name" and "level"
var cfg = {
    name: 'my app',
    console: {
        level: 'info',
        color: true,
        timestamp: 'HH:mm:ss '
    },
    logstash: {
        level: 'info',
        key: 'logstash',
        pubsub: false,
        host: '127.0.0.1',
        port: 6379,
        db: 0
    },
    file: {
        level: 'error',
        path: 'error.log'
    }
};
var log = new Logger(cfg);
log.error('i will appear only in file')

2) Create streams by yourself

var logger = new Logger('my app');
 
logger.appendStream({
    stream: new Logger.stream.logstash(),
    type: 'raw',
    level: 'info'
});
logger.appendStream({
  stream: new Logger.stream.console(),
  type: 'raw',
  level: 'info'
});
 
// if no appendStream called - will be created logger to console only
var log = logger.createLogger();
log.info('hello')
 

3) Pass streams on init in array

var log = new LoggerClass('my app', [{
  stream: process.stdout,
  level: 'info'
}]);
log.error('im usable');

4) Load preset

// will load config from presets/dc-fremont.json
var log = new Logger('my app', 'dc-fremont');
log.error('im usable');

What else:

Logger supports all bunyan features: passing custom fields, child logging, serializers, logging caugth JS expeptions and http responces, working with streams etc. Please visit bunyan documentation for more.