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Helm Values Validator

Paste your Helm values.yaml and get instant validation: YAML syntax, common misconfigurations, resource format issues, and best practice suggestions.

✓ YAML syntax validation ✓ Resource format checks ✓ Best practice suggestions

values.yaml Input

Helm Best Practices Checklist

<div class="flex items-start gap-2"><span class="text-text-muted mt-0.5">□</span><span>Set resource limits (cpu/memory) on all containers</span></div><div class="flex items-start gap-2"><span class="text-text-muted mt-0.5">□</span><span>Define readinessProbe and livenessProbe</span></div><div class="flex items-start gap-2"><span class="text-text-muted mt-0.5">□</span><span>Use imagePullPolicy: IfNotPresent (not Always in prod)</span></div><div class="flex items-start gap-2"><span class="text-text-muted mt-0.5">□</span><span>Avoid latest image tag — use specific versions</span></div><div class="flex items-start gap-2"><span class="text-text-muted mt-0.5">□</span><span>Set replicaCount > 1 for production</span></div><div class="flex items-start gap-2"><span class="text-text-muted mt-0.5">□</span><span>Define PodDisruptionBudget for HA</span></div><div class="flex items-start gap-2"><span class="text-text-muted mt-0.5">□</span><span>Use secrets for sensitive values (not plaintext)</span></div>

Frequently Asked Questions

What is Helm?▼

Helm is the package manager for Kubernetes. Charts (packages) contain templated Kubernetes manifests. A `values.yaml` file provides default configuration; users override values during install. Helm manages releases, upgrades, and rollbacks. It's the standard way to distribute and manage complex Kubernetes applications.

What is values.yaml in Helm?▼

values.yaml is the default configuration file for a Helm chart. It defines all configurable parameters for the chart. Users can override values at install time with `--set key=value` or by providing a custom values file with `-f myvalues.yaml`. Values are accessed in templates via `.Values.key`.

What are common Helm values mistakes?▼

Common issues: (1) Wrong indentation — YAML is indentation-sensitive. (2) Quoting numbers when strings are expected (or vice versa). (3) Missing required fields that have no defaults. (4) Nested key conflicts — setting both `service.type` and `service: ClusterIP`. (5) Wrong resource limit format — CPU should be 'cpu: 100m', not 'cpu: 0.1'.

How do I validate Helm values without deploying?▼

Use `helm template . -f values.yaml` to render templates locally and check for errors. `helm lint` checks the chart structure. For runtime validation, `helm install --dry-run --debug` shows what would be deployed. Use JSON Schema in `values.schema.json` to validate values structure before any rendering.

What is helm values schema validation?▼

Helm supports JSON Schema validation via `values.schema.json` in the chart root. When you run `helm install/upgrade/lint`, Helm validates your values against the schema. This catches type errors, missing required fields, and invalid values before deployment. Strongly recommended for shared charts to provide clear error messages.

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