Kubernetes Resource Name Regex for JavaScript

What this pattern does

This page provides a well-structured, multi-part regular expression for matching kubernetes resource name, ported and verified for JavaScript. A rigorously tested regex reduces debugging time and protects your application from edge-case failures. The snippet below is ready to drop into your JavaScript project — whether you're validating in an Express middleware, a Next.js API route, or a client-side form.

Javascript Implementation

// Kubernetes Resource Name
// ReDoS-safe | RegexVault — Dev & Systems > Environment

const kubernetesResourceNameRegex = /^[a-z0-9](?:[a-z0-9\-]{0,61}[a-z0-9])?$/;

function validateKubernetesResourceName(input: string): boolean {
  return kubernetesResourceNameRegex.test(input);
}

// Example
console.log(validateKubernetesResourceName("default")); // true

Test Cases

When to use this pattern

This pattern is drawn from the Dev & Systems > Environment category and carries a ReDoS-safe certification. That matters for JavaScript developers because especially critical in long-running Node.js event loops where a ReDoS vulnerability can block the entire process. RegexVault audits patterns against known backtracking attack vectors, ensuring you have the necessary context before using this regex in a high-stakes production environment.

Common Pitfalls

Technical Notes

Kubernetes resource names follow RFC 1123 DNS label rules: lowercase, numbers, hyphens; max 63 chars; no leading/trailing hyphens. Applies to namespaces, pods, services, and most resources.