ozeki

a logger that sends json logs to sumologic and allows for adding contextual fields to those json messages. written in typescript and includes typescript definitions.

installation

npm install ozeki

usage

To log to sumo (and still console) and include contextual fields on json log messages:

var ozeki = require('ozeki');
 
function userId() {
  return /* current userId, probably from continuation-local-storage */;
}
 
function txnId() {
  return /* current transaction id, probably from continuation-local-storage */;
}
 
ozeki.initLogging('https://endpoint1.collection.us2.sumologic.com/receiver/v1/http/[YOUR SUMO RECEIVER CODE HERE]', 'prod', () => ({
        _u: userId(),
        _x: txnId()
    }))
 
console.log('testing 123');
console.warn({foo: 'bar', baz: 'blah'});
console.error(new Error('sad trombone'));
 

And you will get output like:

replacing console.log (+context +sumo)
{"_t":"2016-06-28T17:22:22.513Z","_l":"INFO","userId":1, "txnId":"fjoauhg3" ,"msg":"replaced console log fns"}
{"_t":"2016-06-28T17:22:32.936Z","_l":"INFO","userId":1, "txnId":"fjoauhg3" ,"msg":"testing 123"}
{"_t":"2016-06-28T17:23:31.755Z","_l":"WARN","userId":1, "txnId":"fjoauhg3" ,"foo":"bar","baz":"blah"}
{ Error: sad trombone
    at repl:1:15
    at REPLServer.defaultEval (repl.js:272:27)
    at bound (domain.js:280:14)
    at REPLServer.runBound [as eval] (domain.js:293:12)
    at REPLServer.<anonymous> (repl.js:441:10)
    at emitOne (events.js:101:20)
    at REPLServer.emit (events.js:188:7)
    at REPLServer.Interface._onLine (readline.js:224:10)
    at REPLServer.Interface._line (readline.js:566:8)
    at REPLServer.Interface._ttyWrite (readline.js:843:14) _t: '2016-06-28T17:27:02.972Z', _l: 'ERROR', x: 1 }