Elastic Support frequently requests diagnostic files from users to better understand and troubleshoot issues within Elasticsearch clusters. The Support Diagnostic tool aggregates data from various Elasticsearch APIs, compressing outputs into a single zip file, which aids in identifying performance bottlenecks, configuration issues, and other potential problems. This tool, which runs on any system with a Java Virtual Machine, offers both local and remote execution modes and can handle secure clusters with user authentication and TLS encryption. Privacy is emphasized, as the tool does not collect actual data stored in clusters and offers options to scrub sensitive metadata. Furthermore, it can also diagnose issues in Logstash and Elastic Cloud Enterprise (ECE) environments, providing comprehensive insights into system performance and configuration. The Support Diagnostic is regularly updated to include new features and improvements, enhancing its effectiveness in maintaining optimal cluster performance.