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Helm Academy · Lesson

helmfile diff, apply, and sync

Previewing and converging cluster state safely.

Three Verbs to Know

Helmfile gives you three core commands for changing a cluster: diff to preview, apply to converge smartly, and sync to converge unconditionally.

Preview with diff

helmfile diff shows what would change without touching the cluster. It is your safety check before any real deploy.

helmfile -e prod diff

All lessons in this course

  1. Why Helmfile Sits Above Helm
  2. Defining Releases in helmfile.yaml
  3. Environments and Per-Env Values
  4. helmfile diff, apply, and sync
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