---
layout: post
title: 'Kubernetes vs Docker'
date: 2025-12-27 05:00:00 -0400
categories:
  - blog_app
---

# Kubernetes Concepts Cheat Sheet

| Object      | Docker Equivalent              | Kubernetes Purpose                                                |
| ----------- | ------------------------------ | ----------------------------------------------------------------- |
| Node        | The Host Machine               | A physical or virtual server in the cluster.                      |
| Pod         | A Container                    | The smallest deployable unit (can contain multiple containers).   |
| Deployments | `docker-compose up`            | Manages the lifecycle and scaling of Pods.                        |
| Services    | Network Aliases                | Provides a stable DNS name/IP for a group of Pods.                |
| HPA         | Auto-Scaling Group             | Automatically scales replicas based on traffic/load.              |
| Ingress     | Nginx Proxy / Traefik          | Manages external access to Services via HTTP/HTTPS.               |
| ConfigMap   | `docker run -v config:/etc...` | Decouples configuration files from the container image.           |
| Secret      | Environment Variables (Secure) | Stores sensitive data (passwords, tokens) encoded in Base64.      |
| DaemonSet   | `mode: global` (Swarm)         | Ensures one copy of a Pod runs on every Node (logs/monitoring).   |
| StatefulSet | N/A                            | Manages apps requiring stable identities and storage (Databases). |

[[2025-12-27-part-1]]