jhelm — Java Implementation of Helm

jhelm is a native Java implementation of the Helm package manager for Kubernetes. It provides libraries and a CLI to work with Helm charts without the Go-based Helm CLI.

1. Key Features

  • Full Go template engine — 100% Sprig and Helm function coverage

  • Chart lifecycle management — install, upgrade, rollback, uninstall, list, status, history

  • Repository & OCI registries — add/remove repos, search, pull, push

  • Dependency management — list, update, build chart dependencies

  • Spring Boot auto-configuration — programmatic API with @ConfigurationProperties

  • JSON Schema validation — validates chart values against values.schema.json (Draft-07)

  • Template caching — LRU cache for parsed template ASTs

  • Async Kubernetes operations — Java 21 virtual threads via AsyncKubeService

2. Technology Stack

  • Java 21

  • Spring Boot 4.0.2

  • Kubernetes Client 25.0.0

  • Picocli 4.7.6 (CLI framework)

  • Jackson YAML 2.18.2

  • Commons Compress 1.26.1

3. Quick Links