A Helm Chart is a package containing all the resource definitions necessary to run an application in Kubernetes.
Chart Structure:
mychart/
Chart.yaml # Chart metadata
values.yaml # Default configuration values
charts/ # Dependency charts
templates/ # Kubernetes manifest templates
deployment.yaml
service.yaml
ingress.yaml
_helpers.tpl # Template helpers
.helmignore # Files to ignore during packaging
Key Components:
- Chart.yaml: Contains chart metadata (name, version, description, dependencies)
- values.yaml: Default configuration values for template rendering
- templates/: Directory containing Kubernetes manifest templates
- charts/: Subdirectory for chart dependencies
- README.md: Documentation for chart usage
Charts make applications portable and reusable across different environments by parameterizing configuration through values.
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