This tutorial by Gedalyah Reback offers a detailed introduction to setting up OpenSearch clusters, expanding on previous guides about OpenSearch installation and configuration. It provides step-by-step instructions for deploying a four-node cluster using a docker-compose.yml file, highlighting the flexibility of OpenSearch to create more complex, multi-node setups compared to simpler, two-node deployments. The tutorial explains the different types of nodes available in OpenSearch, such as master, data, and ingest nodes, and how to configure them explicitly for specific roles. Additionally, it touches on advanced features like cross-cluster search, which allows executing searches across multiple clusters, a capability inherited from Elasticsearch. The tutorial emphasizes practical application with straightforward examples and encourages further exploration through additional tutorials and resources available on the Logz.io blog.