Concepts

Core concepts that underpin Hydra. Read this to understand the mental model before diving into commands or configuration.

Contents

• Context and Clusters — HYDRA_CONTEXT, clusters, kubernetes context mapping
• Context Resolution — How group and context are inferred from values.yaml
• App Model — Root apps, child apps, App IDs
• Repositories — Charts repository vs GitOps repository
• Dependency Graph — Nodes, edges, topological ordering
• GitOps Workflow — Git → Render → ArgoCD → Cluster
• Hydra ConfigMaps — Dynamic configuration layering
• Cluster Command Data Model — How hydra gitops show, untracked, system, and related commands build and enrich their shared cluster view
• Clones and TemplatePatches — Runtime resource copying and post-render mutations
• Bootstrap — Solving the chicken-and-egg problem

Prerequisites

• Introduction: What Is Hydra?