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wboughattas
2025-12-30 23:53:49 -05:00
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---
layout: post
title: 'Kubernetes vs Docker'
date: 2025-12-27 02:00:00 -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]]