Elasticsearch is not a constructor

[jremerich]

Hi!

I'm trying to use as a correlation with Elastic APM and following docs I did the code below:

const apm = require("elastic-apm-node").start({
  serverUrl: "<apm server http url>"
})

// Set up the logger
var winston = require('winston');
var Elasticsearch = require('winston-elasticsearch');

var esTransportOpts = {
  apm,
  level: 'info',
  clientOpts: { node: "[IP TO MY ELASTICSEARCH]:9200" }
};
var logger = winston.createLogger({
  transports: [
    new Elasticsearch(esTransportOpts)
  ]
});

But it fails showing an error message: Elasticsearch is not a constructor

The APM is configured and working correctly.

I'm using Node.js 12 (docker image node:12-alpine) without typescript.

Thanks!

[vanthome]

well this does not seem to follow the docs, just look here: https://github.com/vanthome/winston-elasticsearch#usage

[jremerich]

Hi!

I'm following the docs where it says "Logs correlation with Elastic APM", here: https://github.com/vanthome/winston-elasticsearch#logs-correlation-with-elastic-apm

However, I tried using as you mentioned and brings an error saying something like "getBody is empty", so I debug this and elasticsearch libs and I saw that when I run the code it tries to startup the index and his mapping on file bulk_writer.js but the request returns 405 as status code with an empty body.

Here is my actual code:

const apm = require('elastic-apm-node').start({
  serviceName: '[APM-Service]',
  environment: process.env.NODE_ENV,
  // secretToken: '',

  // Set custom APM Server URL (default: http://localhost:8200)
  serverUrl: 'http://[ELASTIC APM]:8200'
});

// const { Client } = require('@elastic/elasticsearch')
// const client = new Client({ node: 'http://[ELASTIC IP]:9200' })
var winston = require('winston');
var {ElasticsearchTransport} = require('winston-elasticsearch');
// import { ElasticsearchTransport } from 'winston-elasticsearch';

var esTransportOpts = {
  apm,
  level: 'info',
  dataStream: true,
  clientOpts: { node: "http://[ELASTIC IP]:9200" }
  // client
};
var logger = winston.createLogger({
  apm,
  transports: [
    new ElasticsearchTransport(esTransportOpts)
  ]
});

logger.error('TESTE');

export { logger };

[vanthome]

Why are you providing the apm instance to the logger as well? Apart from that where in bulk_writer.js are you getting this code? Also you might run your application with export DEBUG=winston:elasticsearch. Maybe you see more debug output then.