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Production deployment patterns

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

3 matches

How to Generate a Kubernetes Deployment Manifest in Python

Generate a Kubernetes Deployment manifest as YAML from a Python dictionary using PyYAML.

import yaml

deployment = {
    "apiVersion": "apps/v1",
    "kind": "Deployment",
    "metadata": {
        "name": "mock-app",
        "labels": {"app": "mock-app"}
    },
    "spec": {
        "replicas": 3,
        "selector": {
            "matchLabels": {"app": "mock-app"}
        },
        "template": {
      …

13 0 Open

Production deployment patterns easy

How to Mock a Container Registry in Python

Build an in-memory container registry mock with push, tag listing, and manifest retrieval logic for testing deployment tooling.

containers testing mocking

Python

import json
from collections import defaultdict


class MockRegistry:
    def __init__(self):
        self.repositories = defaultdict(dict)

    def push_image(self, repo: str, tag: str, layers: list[str]) -> None:
        self.repositories[repo][tag] = {
            "layers": layers,
            "size": sum(len(layer…

14 0 Open

Production deployment patterns medium

How to mock Kustomize overlay patches in Python

Simulate Kustomize overlay behavior by deep-merging a base Kubernetes manifest with a patch dictionary in pure Python.

kubernetes kustomize deep-merge

Python

import json

SOURCE = {
    "apiVersion": "apps/v1",
    "kind": "Deployment",
    "metadata": {"name": "app", "namespace": "prod"},
    "spec": {
        "replicas": 3,
        "template": {
            "spec": {
                "containers": [{"name": "app", "image": "nginx:1.19"}]
            }
        }
    }
}

P…

15 0 Open

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