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How to Revoke Tokens with a Blacklist Set in Python
A minimal TokenBlacklist class using a Python set to revoke, batch-revoke, check, and remove expired tokens for simple token invalidation.
import time
class TokenBlacklist:
def __init__(self):
self.blacklisted_tokens = set()
def revoke(self, token):
self.blacklisted_tokens.add(token)
print(f"Token {token} revoked. Blacklist size: {len(self.blacklisted_tokens)}")
def revoke_batch(self, tokens):
before = len(s…Docker healthcheck CMD mock in Python
Runs a subprocess to curl a health endpoint and returns exit code 0 when healthy, 1 when unhealthy, mimicking a Docker HEALTHCHECK command.
import subprocess
import sys
def run_healthcheck() -> int:
result = subprocess.run(["curl", "-fsS", "http://localhost:8080/health"], capture_output=True, text=True)
if result.returncode == 0:
print("healthy")
return 0
print("unhealthy", file=sys.stderr)
return 1
if __name__ == "__ma…How to Create a Liveness Probe HTTP Mock in Python
Build a lightweight HTTP server in Python that mimics a Kubernetes-style liveness endpoint, returning JSON health status for local testing.
import http.server
import threading
import time
class LivenessHandler(http.server.BaseHTTPRequestHandler):
def do_GET(self):
if self.path == "/healthz":
self.send_response(200)
self.send_header("Content-Type", "application/json")
self.end_headers()
self.wfi…How to Mock a Dependency for Readiness Probe in Python
Use unittest.mock.Mock to simulate a dependency's readiness check response for testing a service's is_ready method without hitting a real connection.
import time
import unittest
from unittest.mock import Mock
class Service:
def __init__(self, dependency):
self.dependency = dependency
def is_ready(self):
try:
result = self.dependency.check()
return result == "ready"
except Exception:
return False
…How to Mock an Ingress TLS Certificate Manager in Python
Build a mock TLS certificate manager for ingress that issues, checks, and renews certificates with expiry tracking — useful for testing deployment workflows before touching real infrastructure.
import ssl
import socket
from datetime import datetime, timedelta
class TLSCertManager:
def __init__(self, hostname):
self.hostname = hostname
self.certificates = {}
def request_certificate(self, domain, days_valid=90):
"""Mock a certificate issuance request that stores a cert with e…How to mock resource request limits in Python
A Python class that simulates CPU and memory limit checks for resource requests, returning clear acceptance or rejection messages.
class ResourceLimits:
def __init__(self, cpu_limit, memory_limit):
self.cpu_limit = cpu_limit
self.memory_limit = memory_limit
def check_request(self, cpu, memory):
if cpu > self.cpu_limit:
return "CPU limit exceeded: {cpu} > {limit}".format(cpu=cpu, limit=self.cpu_limit)
…How to simulate a Jenkins pipeline in Python
Simulate a Jenkins-style pipeline in Python by running sequential stages and checking aggregate success.
def run_stage(name, duration, fn):
print(f"[Pipeline] Running stage: {name}")
result = fn()
print(f"[Pipeline] Stage '{name}' completed in {duration}s -> {result}")
return result
def build_project():
print(" compiling source...")
return "BUILD_OK"
def run_tests():
print(" executing unit…How to simulate a database migration init container mock in Python
A mock init container that runs environment checks and a staged database migration job before the main application starts, printing progress to stdout.
```python
class MigrationJob:
def __init__(self, name, steps):
self.name = name
self.steps = steps
self.current_step = 0
self.status = "pending"
def run(self):
print(f"Initializing migration job: {self.name}")
for step in self.steps:
self.current_ste…PodDisruptionBudget minAvailable in Python
Simulate a Kubernetes PodDisruptionBudget check for minAvailable and maxUnavailable constraints with a Python class.
class PodDisruptionBudget:
def __init__(self, name, min_available=None, max_unavailable=None):
self.name = name
self.min_available = min_available
self.max_unavailable = max_unavailable
def check_availability(self, ready_pods):
if self.min_available is not None:
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