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 ❤️
• Container runtime interfaces (CRI)
  • containerd, CRI-O, Docker Engine
• Bonus points for:
  • [docker|podman]-compose

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Agenda

• Workloads aka your app
• Environment
• Containers
• Pods
• Replication Controllers
• Services
• Volumes
• Namespaces

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Advanced topics

• Deployments
• ReplicaSets (the new Replication Controller)
• StatefulSets
• Ingress Controller
• Cluster DNS
• Container Storage Interface (CSI)
• Container Network Interface (CNI)
  • Network Policies
• Custom Resources

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Workloads and the environment

Example: Simple PHP app

• index.php
• PHP runtime
• Webserver
• OS

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Containers

• Provides an isolated environment
  • Linux namespace and cgroups
• Needs to be managed
• Networking
  • I smell another talk around here
• Shared filesystems
• Scheduling
• Load balancing
• Distribution
• Persistant storage

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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/