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IMPORTANT: elasticsearch.js has been replaced by the new Elasticsearch JavaScript client. We strongly advise you to migrate to the new client. To learn more, see the migration guide.

« Using A Library Using the default loggers »
Elastic Docs ›elasticsearch.js ›setup logging

Bunyan Example

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IMPORTANT: This documentation is no longer updated. Refer to Elastic's version policy and the latest documentation.

Bunyan Example

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In the future we may add loggers for some of the more common libraries, but for now this is an exercise for the user. Here is a hint to get you started implementing a Bunyan log class. Be sure to check out the Bunyan repo for more info about setting things up.

in log_to_bunyan.js.

module.exports = LogToBunyan;

var bunyan = require('bunyan');

function LogToBunyan(config) {
  // config is the object passed to the client constructor.
  var bun = bunyan.createLogger({name: 'mylogger'});
  this.error = bun.error.bind(bun);
  this.warning = bun.warn.bind(bun);
  this.info = bun.info.bind(bun);
  this.debug = bun.debug.bind(bun);
  this.trace = function (method, requestUrl, body, responseBody, responseStatus) {
    bun.trace({
      method: method,
      requestUrl: requestUrl,
      body: body,
      responseBody: responseBody,
      responseStatus: responseStatus
    });
  };
  this.close = function () { /* bunyan's loggers do not need to be closed */ };
}

in model.js.

var elasticsearch = require('elasticsearch');
var LogClass = require('./log_to_bunyan');
// now just pass the log class to the client constructor using the "log" config option.
var client = new elasticsearch.Client({ log: LogClass });
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