Slides from my talk at jPrime.io about Java Microservices and Kubernetes

1. DIY Java &
Kubernetes
Pance Cavkovski, Netcetera / JUG MK, jPrime
2016

2. whoamisenior software engineer @ Netcetera
jug.mk Leader
codefu.mk admin
hardware & IoT enthusiast
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
Open source container cluster manager
(orhcestrator)
Based on Google's Borg
Cloud Native Computing Foundation

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

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

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

14. Microservices

15. Microservices
Image credit to @alvaro_sachez

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

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

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