Log4JS - Logstash UDP appender

This is an optional appender for log4js-node.

npm install @log4js-node/logstashudp

The logstashUDP appender supports sending log events to a Logstash server. It uses the node.js core UDP support, and so requires no extra dependencies. Remember to call log4js.shutdown in your application if you want the UDP socket closed cleanly.

Configuration

• type - @log4js-node/logstashudp
• host - string - hostname (or IP-address) of the logstash server
• port - integer - port of the logstash server
• layout - (optional, defaults to dummyLayout) - used for the message field of the logstash data (see layouts)

Example

default config

log4js.configure({
  appenders: {
    logstash: {
      type: '@log4js-node/logstashudp',
      host: 'log.server',
      port: 12345
    }
  },
  categories: {
    default: { appenders: ['logstash'], level: 'info' }
  }
});
const logger = log4js.getLogger();
logger.info({ cheese: 'gouda', biscuits: 'hobnob' });

This will result in a JSON message being sent to log.server:12345 over UDP, with the following format:

{
  'biscuits': 'hobnob',
  'cheese': 'gouda'
}