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Production deployment patterns

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

5 matches

How to Mock a CI Pipeline with Build, Test, and Deploy Stages in Python

Simulate a three-stage CI pipeline (build, test, deploy) in Python with random pass/fail logic, early exit on failure, and measured stage durations.

ci-cd simulation dataclasses

Python

import time
import random
from dataclasses import dataclass


@dataclass
class StageResult:
    name: str
    status: str
    duration: float


def run_stage(name: str, success_chance: float = 0.9) -> StageResult:
    """Simulate a pipeline stage with random success/failure."""
    start = time.time()
    time.sleep(r…

14 0 Open

Production deployment patterns easy

How to Mock a Dockerfile Multi-Stage Build in Python

Simulate a Dockerfile multi-stage build process in Python using dataclasses to validate stage ordering and file availability before you write the real Dockerfile.

dockerfile multi-stage simulation

Python

from dataclasses import dataclass
from pathlib import Path


@dataclass
class BuildStage:
    name: str
    base_image: str
    files: list[str]
    commands: list[str]


def run_build(stage: BuildStage, context_dir: Path):
    print(f"=== Stage: {stage.name} (base: {stage.base_image}) ===")
    for file in stage.file…

14 0 Open

Production deployment patterns easy

How to Mock a Feature Flag Rollout Percentage in Python

Simulate a percentage-based feature flag rollout by hashing a user ID to deterministically enable features for a subset of users.

feature-flags rollout deterministic

Python

import random
from dataclasses import dataclass


@dataclass
class FeatureFlag:
    name: str
    rollout_percentage: int


def is_feature_enabled(feature_flag: FeatureFlag, user_id: str) -> bool:
    hashed_id = hash(user_id) % 100
    return hashed_id < feature_flag.rollout_percentage


if __name__ == "__main__":
  …

11 0 Open

Production deployment patterns easy

How to Mock a GitHub Actions Workflow in Python

Build a dataclass-based model of a GitHub Actions workflow and simulate its execution to validate steps and outputs before deployment.

github-actions dataclasses mock

Python

import json
from dataclasses import dataclass, asdict
from typing import List, Dict, Any


@dataclass
class Step:
    name: str
    run: str


@dataclass
class Job:
    name: str
    steps: List[Step]
    runs_on: str = "ubuntu-latest"


@dataclass
class Workflow:
    name: str
    jobs: List[Job]

    def to_github_a…

13 0 Open

Production deployment patterns easy

How to Replace Fields in an Immutable Dataclass in Python

Create a new copy of a frozen dataclass with selected fields changed, leaving the original unchanged.

dataclasses immutable configuration

Python

from dataclasses import dataclass, replace


@dataclass(frozen=True)
class ServerConfig:
    name: str
    cpu: int = 2
    ram: int = 4096
    tags: tuple = ()


original = ServerConfig("web-01", cpu=4, tags=("env:prod",))
updated = replace(original, ram=8192, tags=("env:prod", "region:us-east"))

print("Original:", …

15 0 Open

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