talks/kubernetes 101/index.md

title	description	author	keywords
Kubernetes 101	An introduction	Ricardo Band	kubernetes,container,basics

Kubernetes 101

An introduction

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Stuff you should already know

• Containers
• Container engines
  • docker, podman ❤️
• Bonus points for:
  • docker-compose
  • podman-compose

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Agenda part 1 - The basics

• 🧑 Workloads aka your app
• 🛋️ Environment
• 📦 Containers
• 🏡 Pods
• 🏘️ ReplicaSets
• 🏪 Services
• 💾 Volumes
• 🌆 Namespaces

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Agenda part 2 - Advanced topics

• 🏭 Deployments
• ? StatefulSets
• 🌐 Ingress Controller
• 📑 Cluster DNS
• 💾 Container Storage Interface (CSI)
• 🕸️ Container Network Interface (CNI)
  • 👮 Network Policies
• 🃏 Custom Resources

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🧑🛋️ Workloads and their environment

Example: Simple PHP app

• index.php
• PHP runtime (php-fpm)
• Webserver (NGINX)
• OS (Alpine)

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📦 Containers

• Isolated environment
  • Linux namespace and cgroups
• Networking?
• Persistant storage?
• Scheduling, Load balancing

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🏡 Pods

• "Runnable unit of work"
• Holds Containers
• Connects to overlay network
• Container runtime interfaces (CRI)
  • containerd, CRI-O, Docker

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🏘️ ReplicaSets

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🏪 Services

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💾 Volumes

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🌆 Namepaces

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🏭 Deployments

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🏘️ ReplicaSets

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? StatefulSets

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🌐 Ingress Controller

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📑 Cluster DNS

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💾 Container Storage Interface (CSI)

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🕸️ Container Netrwork Interface (CNI)

👮 Network Policies

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🃏 Custom Resource

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Containers - Hands on

$ podman run -it --rm docker.io/debian:stable

$ systemctl --user status user.slice

$ podman-compose up

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Sources

• Kubernetes Children’s Guide

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by Ricardo Band

mailto:email@ricardo.band
 https://www.ricardo.band/