Olena Kutsenko

Camp Counselor

Search and aggregations made easy with OpenSearch and NodeJS

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Tuesday, January 17, 2023 - 10:00 PM UTC, for 1 hour.

Regular, 60 minute presentation

Room: Campsite 6


Learn how OpenSearch works and get equipped with practical knowledge to search, aggregate and visualise your data. We'll use several datasets for our examples. First, we'll pretend to be food critics and explore 20K recipes. Next we'll connect OpenSearch to Mastodon public feed (with a bit of Apache Kafka help) to have a glimpse of what people are discussing on the social network! We will interact with the OpenSearch cluster with the help of OpenSearch NodeJS client - create an index, add documents, search and aggregate data. At the end we’ll visualise results with OpenSearch Dashboards and see how you can integrate OpenSearch with Apache Kafka. NodeJS engineers who are ready to add search and aggregation features to their applications should attend this session; no previous knowledge of OpenSearch is required. Come to the session, it will be fun!


In this session the audience will get both theoretical and practical knowledge on what OpenSearch is and how they can work with it by using its NodeJS client. Previous knowledge of JavaScript is desired. However, if you're not a big fan of JavaScript, OpenSearch can be used with other languages and the principles stay the same, so feel free to come to the session to learn about OpenSearch and OpenSearch Dashboards. Those who want to try example on the spot will be able to follow along. For this I prepared two repositories - https://github.com/anelook/opensearch-nodejs-dive-in and https://github.com/anelook/mastodon-feed-to-kafka However, if you just want to sit, relax and enjoy - you can simply watch me exploring the data :)

Take Aways

  • How to start using OpenSearch JavaScript client
  • How to send term-level, full-text and boolean search requests
  • How to bring data from Mastodon into OpenSearch with the help of Kafka and Kafka connect
  • How to explore Mastodon data with OpenSearch
  • How to use OpenSearch to aggregate data from simple metrics aggregations to bucket and pipeline aggregations
  • How to use OpenSearch Dashboards to explore the data
  • How to use OpenSearch Dashboards Dev Tools to send queries directly without an external client
  • Recipe for a soup with beer and garlic ;)
favorited by:
Eric Ewing Joel Lord Caleb Jenkins Brad Garropy Josh Gretz Kris Kirkland