Winston-logstash-transporter NPM

winston-logstash-transporter

Writes logs to logstash using UDP, or to console for development environment.

In production or staging, logstash can be switched with a file based logging that rotates files based on the following rules:

https://github.com/winstonjs/winston-daily-rotate-file

default directory: /var/log/<process.env.APPLICATION_NAME>
filename format: default-%DATE%.log
maxFileSize: 20mb
Maximum time to keep log files: 7 days

Fixes winston issue for logging Javascript error object https://github.com/winstonjs/winston/issues/1338

Example

const logger = require('winston-logstash-transporter')(__filename);

logger.info({
  message: 'Some message here',
  data,
  functionName: 'blah'
});

logger.debug({
  message: 'Some message here',
  data: {
    blah: 'blah'
  }
});

logger.error({
  message: 'Some message here',
  error
});

Environment Variables

LOG_LEVEL = error | warn | info | http | verbose | debug | silly [default = debug]
NODE_ENV = development | staging | production [default = development]
SEND_TO_LOGSTASH = true | false [default = false] //sends to logstash server in <LOGSTASH_SERVER_IP>
SEND_TO_FILE = true | false [default = !SEND_TO_LOGSTASH] //sends logs to /var/log/<APPLICATION_NAME>/application_log/
SEND_TO_STDOUT = true | false [default = true for development, false for production] //prints to standard output (console).
APPLICATION_NAME = your_app_name
LOGSTASH_SERVER_IP = xxx.xxx.xxx.xxx
LOGSTASH_PORT = xxxx
HOST_NAME = host_name