Slides from my talk about Java & Kubernetes at Voxxed Days Belgade'16

1. DIY Java &
Kubernetes
Pance Cavkovski, Netcetera / JUG MK, #VDB16

2. whoamisenior software engineer @ Netcetera
jug.mk Leader
codefu.mk admin
hardware & IoT enthusiast
TTN Skopje initiator
http://pance.mk/ and @hsilomedus

3. Disclaimer
Not affiliated with Google, Pivotal or Docker
Not an expert talk, my findings and experiments
Many thanks to:
– Ray Tsang (@saturnism)
– Arjen Wassink (@ArjenWassink)

4. Spring Boot

5. Spring boot
Simplifies start and configuration of Spring apps
Pre-configured deps., embedded app-server, jar
packing
“Cloud native” Java
Check out: http://start.spring.io/

6. Docker
+ Spring Boot

7. Docker + Spring Boot
1. Have Spring Boot app and Docker installed
2. (reuse) Dockerfile
3. Spotify docker maven plugin (mvn docker:build)
4. Run/Push

8. Demo!
Spring Boot, Dockerfile, spotify maven plugin,
run/push

9. Kubernetes

10. Kubernetes
Greek: helmsman, pilot
Container orchestrator
Open-source system for automating deployment,
scaling, and management of containerized applications.
Based on Google Borg
Cloud Native Computing Foundation

11. Kubernetes, usage
Commodity hardware, docker clusters, GCP (GKE)
Demos:
- 4 node GCP / GKE cluster
- gcloud sdk
- private GKE hub

12. Operations
kubectl
Plugins / Web UI
Google Cloud
Console
Kubernetes, basics
Immutable infrastructure
Key concepts
- Pods
- Labels
- Deployments(Replication Controllers)
- Services
- Persistent disk

13. Kubernetes, 1.1 → 1.4
1.2: Deployments, new GUI, scale improvements
1.3: Automated scaling (GKE), cluster federation,
jobs, minikube, kube (dashboard) UI
1.4: kubeadm init/join, improvements everywhere

14. Demo!
Image build / push
Visualization proxy (gcp-live-k8s-visualizer)
Controller, pods
Service
Scaling
Rolling update
Cleanup

15. Microservices

16. Microservices
Image credit to @alvaro_sachez

17. Demo!
Split app (ui, service, DB)
Session replication
Services and discovery (mysql, redis, service, ui)
.yaml descriptors
Pod operations and failures
Kube UI
Cleanup

18. Homemade cluster
5xRasPi2 + HypriotOS
Containerized Kubernetes
3D printed stack
(available at thingiverse)
Cheap, but slower and ARM

19. Q / A ?
http://pance.mk/
https://twitter.com/hsilomedus
https://github.com/hsilomedus