Kubernetes Resource Name Regex for Python

What this pattern does

This page provides a well-structured, multi-part regular expression for matching kubernetes resource name, ported and verified for Python. A rigorously tested regex reduces debugging time and protects your application from edge-case failures. The snippet below is ready to drop into your Python project — whether you're validating in a Django view, a FastAPI endpoint, or a standalone data processing script.

Python Implementation

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

import re

kubernetes_resource_name_pattern = re.compile(r'^[a-z0-9](?:[a-z0-9\-]{0,61}[a-z0-9])?$')

def validate_kubernetes_resource_name(value: str) -> bool:
    return bool(kubernetes_resource_name_pattern.fullmatch(value))

# Example
print(validate_kubernetes_resource_name("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 Python developers because particularly important in Python web servers where CPU-bound regex operations can stall concurrent request handling. 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.