Helm

# Install a chart
helm install my-app ./charts/my-app

# Install with custom values
helm install my-app ./charts/my-app \
  --values values-prod.yaml \
  --set image.tag=v1.2.3

# Upgrade (install if not exists)
helm upgrade --install my-app ./charts/my-app \
  --namespace production \
  --create-namespace \
  --atomic \
  --timeout 5m

# Upgrade with version pin
helm upgrade my-app bitnami/nginx \
  --version 15.0.0

# View release history
helm history my-app

# Rollback to previous revision
helm rollback my-app

# Rollback to specific revision
helm rollback my-app 3

# View current values
helm get values my-app

# View all computed values (including defaults)
helm get values my-app --all

# List all releases
helm list -A

# Show release status
helm status my-app

# Render templates locally (no install)
helm template my-app ./charts/my-app \
  --values values-prod.yaml

# Dry run (server-side validation)
helm upgrade --install my-app ./charts/my-app \
  --dry-run

# Show computed manifest
helm get manifest my-app

# Add an HTTPS repository
helm repo add ingress-nginx \
  https://kubernetes.github.io/ingress-nginx

# Update all repos
helm repo update

# Search for a chart
helm search repo nginx

# Search Artifact Hub
helm search hub nginx

# Remove a repo
helm repo remove ingress-nginx

# OCI registries — no "helm repo add" step
# Install directly from OCI registry
helm install my-release \
  oci://registry-1.docker.io/bitnamicharts/nginx \
  --version 15.0.0

# Pull OCI chart locally
helm pull oci://registry-1.docker.io/bitnamicharts/nginx \
  --version 15.0.0

# Scaffold a new chart
helm create my-chart

# Lint a chart
helm lint ./charts/my-chart

# Package chart as .tgz
helm package ./charts/my-chart

# Validate against Kubernetes API
helm template my-app ./charts/my-chart | kubectl apply --dry-run=server -f -

# Show chart info
helm show chart bitnami/postgresql
helm show values bitnami/postgresql

# Precedence (highest wins):
# 1. --set flags
# 2. -f / --values files (last file wins)
# 3. Chart defaults (values.yaml)

# Override nested key
--set ingress.hosts[0].host=example.com

# Override list item
--set tolerations[0].key=dedicated \
--set tolerations[0].value=gpu

# Set from file
--set-file config=./app.conf

# Set string explicitly (avoid type coercion)
--set-string version=1.0

# Uninstall a release
helm uninstall my-app

# Uninstall but keep history
helm uninstall my-app --keep-history

# List failed/pending releases
helm list -A --pending
helm list -A --failed

# Delete a stuck namespace (remove finalizers)
kubectl get namespace stuck-ns -o json \
  | jq '.spec.finalizers = []' \
  | kubectl replace --raw /api/v1/namespaces/stuck-ns/finalize -f -