Helm Charts Explained: Package and Deploy Kubernetes Applications

Helm Charts Explained#

Helm is a package manager for Kubernetes. It helps teams package, configure, install, upgrade and rollback Kubernetes applications.

What is a Helm chart?#

A chart is a package of Kubernetes templates and default values.

Chart structure#

mychart/ Chart.yaml values.yaml templates/ deployment.yaml service.yaml

Common commands#

helm version helm repo add bitnami helm repo update helm search repo nginx helm install my-nginx bitnami/nginx helm list helm upgrade my-nginx bitnami/nginx helm rollback my-nginx 1 helm uninstall my-nginx

values.yaml idea#

replicaCount: 2 image: repository: nginx tag: 1.27 service: type: ClusterIP port: 80

Install with custom values#

helm install myapp ./mychart -f values-dev.yaml helm upgrade myapp ./mychart -f values-prod.yaml

When Helm is useful#

• Reusable Kubernetes application packaging.
• Managing environment-specific values.
• Installing third-party apps.
• Repeatable upgrades and rollbacks.

Common mistakes#

• Editing generated Kubernetes resources manually after Helm install.
• Putting secrets directly in values files.
• Not versioning chart changes.
• Using one values file for every environment.

Best practices#

• Use separate values files for environments.
• Review templates before production deployment.
• Use Helm history and rollback carefully.
• Keep charts simple and documented.
• Use secret management patterns for sensitive values.

Related Melochip guides#

• Kubernetes Learning Path
• Terraform Kubernetes and Helm Deployments

Official references#

• Helm documentation