Geneva Kubernetes Meetup Kubernetes on desktop and how to develop application with k8s

1. GENEVA
KUBERNETES
MEETUP
21 octobre 2021

2. MEETUP K8S GENEVA
- Changement Pro
- Geneva
- Docker 2015 ?
- K8s ! and K8s again !

3. MEETUP K8S GENEVA
- Historique

4. MEETUP K8S GENEVA
- Le passage

5. MEETUP K8S GENEVA
- Le renouveau

6. MEETUP K8S GENEVA
- Une nouvelle équipe et un
nouveau souffle !

7. MEETUP K8S GENEVA
- Un évent trimestriel
- Une vraie communauté (~
400 membres) de passionnés
- Débutants Welcome !
- K8s … mais pas seulement

8. MEETUP K8S GENEVA
- un écosystème ENORME !
- Database / Storage
- Messaging, Monitoring
- CI/CD , Automation
- Security
- Network
- API Gateway ...

9. MEETUP K8S GENEVA
- Dans les nuages ….

10. MEETUP K8S GENEVA
- Amicalement votre …
- SoKube

11. MEETUP K8S GENEVA
- Informatique et systèmes de
communication
• Sécurité informatique (HEPIA)
• Informatique logicielle
(HEPIA)
• Systèmes informatiques
embarqués (HEPIA)
• Ingénierie des données
• Réseaux et systèmes

12. MEETUP K8S GENEVA
- Speakers !

13. MEETUP K8S GENEVA
- Sponsors !

14. MEETUP K8S GENEVA
- Let's play !

15. MEETUP K8S GENEVA
- Let's networking !

16. AGENDA
 Introduction
 Topics
➢ We will talk about: Introduction to the different
Kubernetes on the Desktop solutions (non-
exhaustive list)
➢ We will not cover: hosted Kubernetes solutions
(EKS, AKS, GKE, etc...)
 Round table (read: Demo time)
➢ Let's play a game: Kubernetes Battle Royal
(#KBRGeneva)

17. PRELUDE

18. INITIAL QUESTIONS
➢ Assumption: you already heard about Kubernetes and Cloud Native applications
➢ How useful is it to learn Kubernetes with a "Desktop version"?
➢ Do I need Linux on my Desktop?
➢ Should I buy a high-end computer to run Kubernetes?
➢ What are "Kubernetes distributions"?
➢ Do I need to learn "multiple Kubernetes"?
➢ Is docker still relevant, should I learn directly Kubernetes?

19. THE DESKTOP LAYERS
➢ Kubernetes needs Linux
➢ Linux is not my Desktop OS, so I need virtualization
➢ The virtualization can be light (microVM) or heavy (full blown VM)
➢ My VM should be accessible from my Desktop OS, so I need ports open/mapped
➢ I can reach my Kubernetes cluster

20. THE DESKTOP CHALLENGES
Composant / Desktop OS Linux MacOS Windows
K8s Control Plane Native VM / LIMA VM / WSL
K8s Worker Node Native VM / LIMA Native / VM / WSL
K8s CLI Native Native Native
K8s Volumes Native FS Virtualized FS Virtualized FS
K8s Network Host Ports Remote Ports forward Remote Ports forward
PS: The word "native" in the table above, means that the "backend" runs directly on the Desktop OS, and it's not virtualized.

21. USER FRIENDLY
CONTAINERS
MANAGEMENT
➢ The popular: docker
➢ The challenger: podman
➢ The new cool: nerdctl
➢ The backend: containerD
✅ Linux | ❌ MacOS | ✅ Windows
✅ Linux | ⚠️ MacOS | ✅ Windows ✅ Linux | ✅ MacOS | ✅ Windows ✅ Linux | ⚠️ MacOS | ⚠️ Windows

22. KUBERNETES
DISTRIBUTIONS
A NON-EXHAUSTIVE LIST FOR YOUR NEXT SIDE
PROJECT

23. DOCKER
DESKTOP
➢ Docker Desktop is officially supported to run upstream K8s on
MacOS and Windows
➢ Docker Desktop on Linux has been announced for a future date
➢ Single node cluster
➢ Easy enable/disable/reset options
➢ K8s version not modifiable
➢ Target: DEV environments

24. MINIKUBE ➢ Minikube is officially supported to run upstream K8s on
Linux, MacOS and Windows
➢ Single or Multiple nodes cluster
➢ Easy start/stop options
➢ K8s version modifiable
➢ Addons available
➢ Target: DEV environments

25. MICROK8S
 MicroK8s is officially supported to run upstream K8s on Linux (snap), MacOS
(VirtualBox) and Windows (Hyper-V,Virtualbox)
 MicroK8s on MacOS and Windows require Multipass
 MicroK8s can run on WSL and should also run on LIMA (to be tested)
 Single node cluster
 Multiple nodes cluster is possible but not available out of the box
 Easy start/stop options
 K8s version modifiable
 Target: DEV environments

26. K3S / K3D
/ RANCHER
DESKTOP
 K3s only runs on Linux
 k3d runs K3s inside a container
 Rancher Desktop is officially supported to run K3s on MacOS (LIMA)
and Windows (WSL)
 Single or Multiple nodes cluster
 Rancher Desktop can only run single node (oct-2021)
 Easy start/stop/cleanup options
 K3s version modifiable
 Target: DEV (all) / TEST (K3s) / PROD (K3s) environments

27. K0S
 K0s is officially supported to run upstream K8s on Linux
 K0s can run inside a container
 Single or Multiple nodes cluster
 The default install requires at least two nodes
 Easy start/stop/cleanup options
 K8s version modifiable
 Target: DEV (all) / TEST (K3s) / PROD (K3s) environments

28. KIND  KinD is officially supported to run upstream K8s inside a
container
 KinD CLI is officially supported to run on Linux, MacOS and
Windows
 Single or Multiple nodes cluster
 By default, only the single node cluster is managed by the
CLI
 Easy start/stop/cleanup options
 K3s version modifiable
 Target: DEV (all) / TEST (K3s) / PROD (K3s) environments

29. DEV WITH KUBERNETES
ON THE DESKTOP ?

30. BENEFITS FOR DEV
 Benefits of contains/k8s : for PROD, only ?
 What about the dev team ?
 Same env, same rules !
 Focus on the app(s)
 Same runtime
 Multi-projects capabilities
 Equalizer for the team

31. DEV PROCESS
http://jorgemoral.es/posts/2020_03_17-develop_apps_in_k8s_and_not_die_trying-inner_loop_outer_loop/

32. “CONTROL + SAVE” WORKFLOW ON KUBERNETES

33. TOOLS FOR K8S DEV WORKFLOW

34.  CLI that facilitates continuous development for Kubernetes applications
 https://github.com/GoogleContainerTools/skaffold
 Google project
 Apache-2.0 License
 MacOs, Linux and Windows
 Any Kubernetes cluster → Local or remote
 CLI:
 skaffold init → skaffold.yaml
 scaffold dev → build and deploy your app continuously
(Local or Remote repo)
 scaffold run → building and deploying once at a time
SKAFFOLD

35.  CLI for Cloud-Native Development with Kubernetes
 https://github.com/loft-sh/devspace
 Lôft project
 Apache-2.0 License
 MacOs, Linux and Windows
 Any Kubernetes cluster → Local or remote
 CLI:
 devspace init → devspace.yaml
 devspace dev → to start developing your project in k8s
 devspace deploy → to deploy your project to k8s
DEVSPACE

36.  Remote development environments, powered by Kubernetes
 https://github.com/okteto/okteto
 Licence Apache 2
 MacOs, Linux and Windows
 Any Kubernetes cluster → Local or remote
 Okteto Cloud → $
 CLI
 okteto init → okteto.yml
 okteto up → Activate your development container
OKTETO

37.  Fast, local development for Kubernetes microservices
 https://github.com/telepresenceio/telepresence
 Ambassador team
 Apache-2.0 License
 MacOs, Linux and Windows
 Any Kubernetes cluster → Local or remote
 getambassador.io → $
 CLI
 telepresence connect → Daemon + k8s agent
 telepresence intercept → Intercept all traffic going to the
service in your cluster
TELEPRESENCE

38. TOOLS FOR K8S DEV WORKFLOW
odo
>_
OLD tools:

39. DON’T FORGET YOUR IDE
 Local / Remote dev server with an SSH access
 Code Editors with remote development capabilities
 Ex: Remote extension pack with VSCode:
 Remote WSL
 Remote SSH
 Remote container

40. INNER AND OUTER LOOP WITH K8S
➔ Can be nearly the same
 Write code
 Build container
 Push to registry
 Deploy to cluster
 Test
 Validate
 …
But can be ……………………… SLLOOOWWWW !!!!!

41. 16 GO, 8 CORE I9 ONLY !!!!
AND YOU’RE ASKING TO
BUILD AND RUN K8S
WITH A JVM A FRONT
ANGULAR AND A
DATABASE !

42. PATCHING STRATEGIES
 Docker for Mac/Windows (D4M/D4W)
 Very bad perf ➔ shared filesystem
 Workaround
 Copy rsync
 Mutagen
 Caching strategy
 Parallels VM as hypervisor
 ➔ make the pain tolerable

43. DEV MODES: REMOCAL
https://kubernetes.io/blog/2018/05/01/developing-on-kubernetes/

44. CLOUD NATIVE APPLICATION: CNA
Architecture Design
Stateless
Monitoring
Startup / Shutdown
Scaling
Deployment strategy
Quality
Security

45. DevX: CNA Developer eXperience
➢Replicable
➢Realistic
➢Fast
https://devopedia.org/shift-left

46. QUESTIONS ?

47. #KBRGENEVA
POD?

48. PROCHAIN MEETUP