Generating Helm Charts

Overview

Generate production-ready Helm 3 charts for Kubernetes applications with Chart.yaml, values.yaml, Go templates, and helper functions. Support multi-environment deployments with values overrides, dependency management, security contexts, health probes, and resource limits following Helm best practices.

Prerequisites

Helm 3.x installed (helm version)
kubectl configured with cluster access for testing chart installation
Container images available in a registry accessible from the cluster
Understanding of application resource requirements (CPU, memory, ports, volumes)
Chart repository access if publishing (ChartMuseum, OCI registry, or GitHub Pages)

Instructions

Analyze the application: identify container images, ports, environment variables, volumes, and dependencies
Scaffold the chart structure: Chart.yaml, values.yaml, templates/, charts/, .helmignore
Create Chart.yaml with apiVersion: v2, name, version, appVersion, and dependency declarations
Define values.yaml with sensible production defaults: replica count, image config, resource limits, ingress settings
Build templates using Go template syntax with proper .Values references and _helpers.tpl for reusable named templates
Add health checks: livenessProbe and readinessProbe in the deployment template with configurable paths and thresholds
Configure security context: runAsNonRoot: true, readOnlyRootFilesystem: true, and drop all capabilities
Create environment-specific values files: values-dev.yaml, values-staging.yaml, values-prod.yaml
Add NOTES.txt with post-install instructions showing how to access the application
Validate with helm lint . and test rendering with helm template . --values values-prod.yaml

Output

Complete Helm chart directory structure
Chart.yaml with metadata and dependencies
values.yaml with documented, configurable defaults
Template files: deployment.yaml, service.yaml, ingress.yaml, configmap.yaml, serviceaccount.yaml, hpa.yaml
_helpers.tpl with name, label, and selector helper templates
NOTES.txt with post-install access instructions
Environment-specific values override files

Error Handling

Error	Cause	Solution
`Chart.yaml: version is required`	Missing or malformed `version` field	Add a valid SemVer version string to Chart.yaml
`parse error in template`	Go template syntax error (missing `end`, wrong function)	Run `helm template .` to pinpoint the error; check bracket matching and function names
`dependency not found`	Chart dependency not downloaded	Run `helm dependency update` to fetch dependencies into `charts/`
`release failed: timed out waiting for condition`	Pods not reaching ready state during install	Check pod logs; verify image exists, resource limits are sufficient, and probes are correct
`values override not applied`	Wrong values file path or key mismatch	Verify `--values` file path and that keys match the structure in `values.yaml` exactly

Examples

"Generate a Helm chart for a Node.js API with 3 replicas, an Nginx ingress, PostgreSQL subchart dependency, and environment-specific values for dev and prod."
"Create a Helm chart for a stateful application with PersistentVolumeClaim, headless service, and configurable storage class."
"Package an existing set of Kubernetes manifests into a Helm chart with parameterized image tag, replica count, and resource limits."

Resources

Helm documentation: https://helm.sh/docs/
Chart best practices: https://helm.sh/docs/chart_best_practices/
Template function reference: https://helm.sh/docs/chart_template_guide/function_list/
Artifact Hub (chart discovery): https://artifacthub.io/

generating-helm-charts