get-ing-classes-list.py

#!/usr/bin/env python3

# kubectl get ing --all-namespaces -o yaml > /tmp/ing.yaml

import yaml

data = yaml.load(
  open("/tmp/ing.yaml").read()
)

for el in data['items']:
  name = el["metadata"]["name"]
  if "kubernetes.io/ingress.class" in el["metadata"]["annotations"]:
    ing_class = el["metadata"]["annotations"]["kubernetes.io/ingress.class"]
  else:
    ing_class = "universal"
  
  for rule in el['spec']['rules']:
    print(
      f"{ing_class}\t\t{rule['host']}"
    )