GoogleContainerTools/skaffold · error

collecting helm releases namespaces: %w

Error message

collecting helm releases namespaces: %w

What it means

This error is returned by GetAllPodNamespaces when collecting the namespaces referenced by Helm releases in the skaffold pipelines fails. It wraps the error from collectHelmReleasesNamespaces, which in practice means a templated helm release namespace could not be expanded (see error 252). Skaffold re-wraps it to give context that the failure occurred while building the list of namespaces to watch.

Source

Thrown at pkg/skaffold/deploy/util/namespaces.go:55

		config, err := kubectx.CurrentConfig()
		if err != nil {
			return nil, fmt.Errorf("getting k8s configuration: %w", err)
		}

		context, ok := config.Contexts[config.CurrentContext]
		if ok {
			nsMap[context.Namespace] = true
		} else {
			nsMap[""] = true
		}
	} else {
		nsMap[configNamespace] = true
	}

	// Set additional namespaces each helm release referenced
	helmReleasesNamespaces, err := collectHelmReleasesNamespaces(pipelines)
	if err != nil {
		return nil, fmt.Errorf("collecting helm releases namespaces: %w", err)
	}
	for _, namespace := range helmReleasesNamespaces {
		nsMap[namespace] = true
	}

	// Collate the slice of namespaces.
	namespaces := make([]string, 0, len(nsMap))
	for ns := range nsMap {
		namespaces = append(namespaces, ns)
	}

	sort.Strings(namespaces)
	return namespaces, nil
}

func collectHelmReleasesNamespaces(pipelines []latest.Pipeline) ([]string, error) {
	var namespaces []string
	for _, cfg := range pipelines {

View on GitHub (pinned to a1189de023)

Solutions

1. Export the environment variable referenced in the helm release namespace template (e.g. `export MY_NAMESPACE=myns`).
2. Replace the templated namespace in skaffold.yaml with a literal namespace string.
3. Verify all template expressions in helm release namespaces resolve by checking the underlying ExpandEnvTemplateOrFail error in the wrapped output.
4. Move the namespace definition into the helm chart values instead of the release namespace field.

Example fix

// skaffold.yaml before
releases:
  - name: myrelease
    namespace: {{.RELEASE_NAMESPACE}} # unset env var
// after
releases:
  - name: myrelease
    namespace: mynamespace

// Verify every templated helm release namespace resolves before calling
for _, cfg := range pipelines {
	if cfg.Deploy.LegacyHelmDeploy != nil {
		for _, r := range cfg.Deploy.LegacyHelmDeploy.Releases {
			if r.Namespace != "" {
				if _, err := util.ExpandEnvTemplateOrFail(r.Namespace, nil); err != nil {
					log.Printf("namespace template %q cannot expand: %v", r.Namespace, err)
				}
			}
		}
	}
}

namespaces, err := util.GetAllPodNamespaces(ns, pipelines)
if err != nil && strings.Contains(err.Error(), "collecting helm releases namespaces") {
	return fmt.Errorf("helm release namespace config invalid: %w", err)
}

When it happens

Trigger: Calling GetAllPodNamespaces with pipelines whose Deploy.LegacyHelmDeploy releases declare a Namespace field that contains an env/template expression (e.g. {{.NAMESPACE}}) referencing an unset variable or otherwise failing template expansion.

Common situations: A skaffold.yaml helm release uses `namespace: {{.MY_NAMESPACE}}` but the environment variable is not exported in the shell/CI environment; typos in template variable names; moving a working config to a new environment where required env vars are missing.

Related errors

• cannot parse the release namespace template: %w
• cannot parse the release name template: %w
• packaged.version template: %w
• packaged.appVersion template: %w
• cannot parse the release namespace template: %w

AI-assisted analysis of GoogleContainerTools/skaffold@a1189de023 (2026-09-05). Data as JSON: /api/errors/3cdf2a643863635b. Report an issue: GitHub.