# Container Workshop

# Themenspeicher

- VIM
- Softwareverwaltung
- Pakete
- Repositories / git
- Patching
- Service-Architekturen mit Docker Compose abbilden
- Docker in Docker und DNS
- ElasticSearch offizielles Image
- AppArmour, SELinux
- Security
- Rootless
- Podman

## Day 1

- Docker Foundations
- Angenehmes Arbeiten mit der Shell
- History
- Automatische Vervollständigung
- Navigation, Hilfe und Suche
- Vordergund- und Hintergrundprozesse
- Filesystem Hierarchy Standard
- SSH
- User und Gruppen
- Filesystemrechte

## Day 2
- Contol Groups (cgroup)
- Namespaces
- Linux Capabilities
- OverlayFS
- Erstellen eigener Docker-Images
- „Dockern“ einer Software Applikation
- Volume-Management und Docker
- Log-Management und Docker
- Netzwerke und Docker
- Multi-Host Networking mit Docker

# Tasks
## Task 1: Prepare Your Sandbox

1. Connect to the lab host, see email instructions
2. Create a new user for yourself (belonging to group ec2-user)
3. Add user to docker group
4. Give user the sudo privilege
5. Change to your new user
6. Check executing a few Docker commands
7. Check that sudo is working
8. Create a private/public key pair
9. Add the public key to the user
10. Use your private key on your local machine to login to your new user on the lab host.

## Links

https://medium.com/@mccode/understanding-how-uid-and-gid-work-in-docker-containers-c37a01d01cf
https://kinvolk.io/blog/2020/12/improving-kubernetes-and-container-security-with-user-namespaces/
https://www.schutzwerk.com/en/43/posts/linux_container_capabilities/
https://github.com/justincormack/nsenter1
https://medium.com/bb-tutorials-and-thoughts/250-practice-questions-for-the-dca-exam-84f3b9e8f5ce
https://linux-audit.com/linux-capabilities-101/
https://itnext.io/linux-container-from-scratch-339c3ba0411d
https://github.com/p8952/bocker
https://stackoverflow.com/questions/53669151/java-11-application-as-lightweight-docker-image/53669152#53669152
https://sysdig.com/blog/dockerfile-best-practices/#1-3
https://medium.com/@betz.mark/understanding-resource-limits-in-kubernetes-memory-6b41e9a955f9
http://www.brendangregg.com

## Ideas

- Labs & Tasks
- https://devconnected.com/30-linux-processes-exercises-for-sysadmins/
- https://devconnected.com/30-linux-permissions-exercises-for-sysadmins/
- https://devconnected.com/category/linux-administration/

## Cheat Sheets

vim
https://www.slideshare.net/KopiMaheswaran/vi-cheat-sheet-141052706
http://www.viemu.com/vi-vim-cheat-sheet.gif
https://external-preview.redd.it/iigrixvxp5aYN9ox7Gr1dfI_rhLRotWlLsCafjJqjEQ.png?auto=webp&s=1594ddc17408cb9186a73c2a6d1a1bf1e00769dd

bash
https://devhints.io/bash
https://github.com/ohmyzsh/ohmyzsh

sudo
https://phoenixnap.com/kb/how-to-create-add-sudo-user-centos
https://linuxize.com/post/how-to-add-user-to-sudoers-in-ubuntu/