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/