all_k8s_without_limits.py

#!/usr/bin/env python3

import subprocess, json, argparse

parser = argparse.ArgumentParser(description="Show all Kubernetes objects without limits.")
parser.add_argument("--namespace", metavar="NAMESPACE", help="namespace to look at (default: all namespaces)")
parser.add_argument("--context", help="context to use (default: current context)")
args = parser.parse_args()

extra_options = []
if args.namespace:
    extra_options.extend(["--namespace", args.namespace])
else:
    extra_options.append("--all-namespaces")
if args.context:
    extra_options.extend(["--context", args.context])
    

def collect_objects(resource_type):
    json_data = subprocess.run(["kubectl", "get", resource_type, "-o", "json"] + extra_options,
                               text=True, capture_output=True, check=True).stdout
    for object_ in json.loads(json_data)["items"]:
        if resource_type in {"deployment", "job", "daemonset", "statefulset"}:
            containers = object_["spec"]["template"]["spec"]["containers"]
        elif resource_type == "cronjob":
            containers = object_["spec"]["jobTemplate"]["spec"]["template"]["spec"]["containers"]
        for container in containers:
            if not container["resources"]:
                print(object_["metadata"]["namespace"] + "." + resource_type + "." +
                      object_["metadata"]["name"] + "." + container["name"])

    
for resource_type in ("deployment", "job", "cronjob", "daemonset", "statefulset"):
    collect_objects(resource_type)