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IEvangelist merged 2 commits into from
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[docs] Document Helm v4.2.0+ prerequisite for Kubernetes deployment #1090

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docs: document Helm v4.2.0+ prerequisite for Kubernetes deployment
aspire-repo-bot[bot] May 27, 2026
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IEvangelist May 29, 2026
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14 changes: 11 additions & 3 deletions src/frontend/src/content/docs/deployment/kubernetes.mdx
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Expand Up @@ -11,10 +11,18 @@ import LearnMore from '@components/LearnMore.astro';

Kubernetes is a supported deployment target for Aspire applications. By adding the Kubernetes hosting integration to your AppHost, you can use `aspire publish` to generate a complete set of Helm chart artifacts ready for deployment to any Kubernetes cluster.

## Prerequisites

Before deploying to Kubernetes with Aspire, ensure the following tools are installed and available on your `PATH`:

- **[Helm](https://helm.sh/docs/intro/install/) v4.2.0 or later** — Aspire shells out to `helm upgrade --install` to deploy the generated chart. It validates the Helm version up front; missing or older versions produce a clear, actionable error rather than cryptic flag failures.
- **[kubectl](https://kubernetes.io/docs/tasks/tools/)** — Required to interact with your cluster.

<Aside type="note">
Kubernetes uses `aspire publish` to generate Helm charts. It does not support
`aspire deploy` — you deploy the generated artifacts using `helm`, `kubectl`,
or your existing GitOps workflow.
Kubernetes uses `aspire publish` to generate Helm charts and `aspire deploy`
to run the Helm deployment pipeline against your configured cluster. You can
also deploy the generated artifacts using `helm`, `kubectl`, or your existing
GitOps workflow.
</Aside>

<LearnMore>
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4 changes: 4 additions & 0 deletions src/frontend/src/content/docs/integrations/compute/kubernetes.mdx
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Expand Up @@ -22,6 +22,10 @@ This article is the reference for the Aspire Kubernetes hosting integration. It

## Installation

:::note[Prerequisite: Helm v4.2.0 or later]
Aspire's Kubernetes deployment pipeline shells out to `helm upgrade --install` and validates the installed Helm version before executing. **[Helm](https://helm.sh/docs/intro/install/) v4.2.0 or later** must be on your `PATH`. If Helm is missing or too old, Aspire reports a clear, actionable error instead of cryptic flag failures.
:::

To start building an Aspire app with Kubernetes deployment support, install the [📦 Aspire.Hosting.Kubernetes](https://www.nuget.org/packages/Aspire.Hosting.Kubernetes) NuGet package:

<Tabs syncKey="aspire-lang">
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