Python (re)

Kubernetes Pod Name (RFC 1123) in PY

Validate Kubernetes pod names per the RFC 1123 DNS label rules — lowercase, ≤63 chars, no leading/trailing hyphen.

Try it in the PY tester →

Pattern

regexPY
^[a-z0-9](?:[a-z0-9\-]{0,61}[a-z0-9])?$

Python (re) code

pyPython
import re

pattern = re.compile(r"^[a-z0-9](?:[a-z0-9\-]{0,61}[a-z0-9])?$")
input_text = "nginx-deployment-66b6c48dd5-abcd1"
for m in pattern.finditer(input_text):
    print(m.group(0))

Stdlib `re` module — no third-party dependency. Works on Python 3.6+.

How the pattern works

Stricter than the general hostname pattern: pod names must be LOWERCASE only (per K8s spec). [a-z0-9] for first char. (?:[a-z0-9\-]{0,61}[a-z0-9])? optionally allows up to 61 more chars ending in a non-hyphen. Total length ≤63 chars per RFC 1123 label limits.

Examples

Input

nginx-deployment-66b6c48dd5-abcd1

Matches

  • nginx-deployment-66b6c48dd5-abcd1

Input

my-app

Matches

  • my-app

Input

MyApp

No match

—

Same pattern, other engines

JavaScript / ECMAScript

Supported

See how this pattern looks (and behaves) in JavaScript's built-in RegExp.

Go (RE2)

Supported

See how this pattern looks (and behaves) in Go's `regexp` package (RE2 engine).

← Back to Kubernetes Pod Name (RFC 1123) overview (all engines)