Reference library

Production deployment patterns

Graceful shutdown, prod config, rollouts, readiness probes, and ship-with-confidence checks.

5 matches

How to Mock Kubernetes Secret Mounts in Python

Create and inspect a mock Kubernetes secret volume mount using the official client library and unittest.mock.

import json
from kubernetes import client, config, watch
from unittest.mock import Mock, patch

def create_mock_mount_spec():
    """Create a mock Kubernetes secret volume mount."""
    mock_client = Mock()
    mock_client.api_version = "v1"
    mock_client.kind = "Secret"
    mock_client.metadata = {"name": "my-secre…

14 0 Open

Production deployment patterns easy

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.

unittest.mock mock readiness probe

Python

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
…

17 0 Open

Production deployment patterns easy

How to Mock a Slow Startup Probe for Fast Testing in Python

This code shows how to replace a slow startup probe's initialization with a mock to make tests run fast and reliably.

mock testing startup-probe

Python

import time
from unittest.mock import Mock, patch


class StartupProbe:
    def __init__(self, init_time):
        self.init_time = init_time
        self.ready = False

    def initialize(self):
        time.sleep(self.init_time)
        self.ready = True
        return self.ready


def run_startup_probe(probe):
    …

15 0 Open

Production deployment patterns easy

How to Mock time.sleep in a Python PreStop Hook

This code simulates a Kubernetes PreStop hook that delays shutdown, then mocks time.sleep to verify the hook logic without real delay.

mocking prestop kubernetes

Python

import subprocess
import sys
import time
from unittest.mock import patch

def pre_stop_hook():
    """Simulate a Kubernetes PreStop hook that sleeps before shutdown."""
    print("PreStop hook started: delaying shutdown")
    time.sleep(3)
    print("PreStop hook completed: ready to shutdown")

if __name__ == "__main_…

14 0 Open

Production deployment patterns medium

How to Smoke Test a Deployment in Python with unittest.mock

Run a post-deploy smoke test by mocking the deployment status check to verify your health-check logic returns PASS/FAIL.

deployment smoke-test unittest-mock

Python

import unittest
from unittest.mock import Mock, patch

class DeploymentService:
    def check_status(self):
        return "unknown"

def smoke_test_deploy():
    service = DeploymentService()
    with patch.object(service, "check_status", return_value="healthy") as mock_check:
        status = service.check_status()
…

13 0 Open

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