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A Bunyan stream for saving logs into Elasticsearch.


npm install bunyan-elasticsearch

Logstash Template

By default Logstash will create a dynamic template that will take care of crating .raw fields for your data. In order to replicate this behavior you will need to create the dynamic template manually. You will need to download template.json and run the following command from the same directory as that file:

curl -XPUT localhost:9200/_template/logstash -d @template.json


var bunyan = require('bunyan');
var Elasticsearch = require('bunyan-elasticsearch');
var esStream = new Elasticsearch({
  indexPattern: '[logstash-]YYYY.MM.DD',
  type: 'logs',
  host: 'localhost:9200'
esStream.on('error', function (err) {
  console.log('Elasticsearch Stream Error:', err.stack);
var logger = bunyan.createLogger({
  name: "My Application",
  streams: [
    { stream: process.stdout },
    { stream: esStream }
  serializers: bunyan.stdSerializers
});'Starting application on port %d', app.get('port'));


  • client: Elasticsearch client. Defaults to new client created with current set of options as an argument
  • type {string|function}: Elasticsearch type field. Default: 'logs'
  • indexPattern {string}: Used to generate index if index option not set. Default: '[logstash-]YYYY.MM.DD'
  • index {string|function}: Elasticsearch index. Defaults to index generated using index pattern

Options type and index can be either a string or function. For these options, when the option is set to a function, the function is passed the log entry object as an argument