Helm Commands & Template Cheat Sheet ⚡

Categorized command sheet for chart installation, releases, repository management, and custom values.

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1. Essential Helm Commands

Command	Description	Example
helm create <name>	Scaffold a new chart directory structure.	helm create my-app
helm install	Install a chart onto Kubernetes cluster.	helm install my-web bitnami/nginx
helm upgrade	Upgrade an existing release.	helm upgrade my-web bitnami/nginx
helm rollback	Roll back release to a previous revision.	helm rollback my-web 1
helm list	List all active releases in current namespace.	helm list -A
helm uninstall	Delete release and all its resources.	helm uninstall my-web

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2. Using Custom Values

# Override values via CLI flags
helm install my-web bitnami/nginx --set service.type=NodePort --set replicaCount=3

# Override values using a custom values YAML file
helm install my-web bitnami/nginx -f production-values.yaml

# Dry run & render templates to stdout without applying to cluster
helm template my-web ./mychart -f values.yaml

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3. Sample Helm Template Snippet (deployment.yaml)

apiVersion: apps/v1
kind: Deployment
metadata:
  name: {{ .Release.Name }}-app
spec:
  replicas: {{ .Values.replicaCount }}
  selector:
    matchLabels:
      app: {{ .Release.Name }}
  template:
    metadata:
      labels:
        app: {{ .Release.Name }}
    spec:
      containers:
        - name: {{ .Chart.Name }}
          image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"
          ports:
            - containerPort: {{ .Values.service.port }}