Have you ever wanted to create a physical cockpit or replica of Homer Simpson’s dashboard to control your Kubernetes cluster? Of course you have! Along with making it easier to efficiently use server hardware, Kubernetes has created a standardized deployment model that makes it easy to control and get interesting information about your cluster. Metrics about the containers in the cluster such as how many are running, where they are running, how much CPU and memory they consume, and progress on rolling updates or deployments are all possible using the API. At the same time, new developments in IoT and easy to use prototyping kits have opened up new possibilities for interesting hardware based interfaces. In this talk we’ll combine Kubernetes with hardware in interesting ways to provide useful visualizations and controls for your container clusters and have a lot of fun on the way! We will discuss how the Kubernetes API standardizes deployment and thus opens up new possibilities in terms of applications. Then we’ll demonstrate a number of interactive & engaging hardware devices that make use of the Kubernetes API. Finally, we’ll look at how we used the API and discuss the possibilities for other kinds of software and hardware based apps. Sched Link: http://sched.co/6Bl3

1. Ian Lewis
Developer Relations
Kubernetes Hardware Hacks
Exploring the Kubernetes API Through Knobs, Faders, and Sliders

2. Confidential & ProprietaryGoogle Cloud Platform 2
Ian Lewis
Developer Advocate - Google Cloud Platform
Tokyo, Japan
google.com/+IanLewis-hoge
@IanMLewis

3. Confidential & ProprietaryGoogle Cloud Platform 3
私は日本語ちょっとできます
I can speak Japanese a little

4. Confidential & ProprietaryGoogle Cloud Platform 4
Dashboard

6. Jean-Etienne Poirrier
Creative Commons

7. Duch.seb
Creative Commons

8. Google Cloud Platform
kubelet
UI
kubeletCLI
API
users master nodes
The 10000 foot view
etcd
kubelet
scheduler
controllers
apiserver

9. Google Cloud Platform
UI
All you really care about
API
Container
Cluster

10. Google Cloud Platform
UI
All you really care about
API
Container
Cluster

11. Confidential & ProprietaryGoogle Cloud Platform 11
http://localhost:8888/swagger-ui/

12. Google Cloud Platform
Objects
● Nodes
● Pods
● ReplicationControllers
● Services
● etc.

13. Confidential & ProprietaryGoogle Cloud Platform 13
observe
diff
act

14. Google Cloud Platform
Clients
● CLI: kubectl!
● Official Go client
● Fabric8/OSGi
● pykube
● More: kubernetes/docs/devel/client-libraries.
md

15. Confidential & ProprietaryGoogle Cloud Platform 15
kubectl proxy & curl

16. Confidential & ProprietaryGoogle Cloud Platform 16
kubectl

17. Confidential & ProprietaryGoogle Cloud Platform 17
kubectl get pods
GET /api/v1/namespaces/default/pods
{
"kind": "PodList",
"apiVersion": "v1",
"metadata": {
"selfLink": "/api/v1/namespaces/default/pods",
"resourceVersion": "3742101"
},
"items": [
…
]
}

18. Confidential & ProprietaryGoogle Cloud Platform 18
kubectl get pods --namespace=myns
GET /api/v1/namespaces/myns/pods
{
"kind": "PodList",
"apiVersion": "v1",
"metadata": {
"selfLink": "/api/v1/namespaces/myns/pods",
"resourceVersion": "3742101"
},
"items": [
…
]
}

19. Confidential & ProprietaryGoogle Cloud Platform 19
kubectl label pod mypod a=b
PUT /api/v1/namespaces/default/pods/mypod
…
“metadata”: {
“labels”: [“a”: “b”, …]
}
...

20. Confidential & ProprietaryGoogle Cloud Platform 20
kubectl rolling-update
GET /api/v1/namespaces/default/replicationcontrollers/B
POST /api/v1/namespaces/default/replicationcontrollers
...
PUT /api/v1/namespaces/default/replicationcontrollers/B
...
PUT /api/v1/namespaces/default/replicationcontrollers/A
...

21. Google Cloud Platform
Dashboard
publisher
subscriber
launchpad
launchcontrol
API
scale
get pods

22. Google Cloud Platform
Dashboard
publisher
subscriber
launchpad
launchcontrol
API
scale
get pods
?
?

23. Google Cloud Platform
Standard Deployment
● Docker deployments require lots of tooling
● Kubernetes API has visibility into the cluster
● Great for building things on top like CI, CD,
and dashboards!

24. Done! Thanks!
@IanMLewis