http://www.meetup.com/Docker-Karlsruhe/events/220797663/ mehr Meetups von inovex: http://www.meetup.com/inovex-karlsruhe http://www.meetup.com/inovex-munich http://www.meetup.com/inovex-cologne

1. Kubernetes
Hands on Kubernetes
Johannes Maximilian Scheuermann
Karlsruhe, 19.03.2015

2. Images: http://upload.wikimedia.org/wikipedia/en/thumb/9/9f/Twitter_bird_logo_2012.svg/1267px-
Twitter_bird_logo_2012.svg.png , https://developers.google.com/+/branding-guidelines?hl=de
About me
● Computer Science Student - Master @KIT
● Working at inovex GmbH
○ IT Engineering & Operations
○ Docker & Kubernetes
○ New Datacenter Technologies
● IRC @johscheuer
A brief introduction
@johscheuer +JohannesScheuermann

3. Kubernetes
Our Setup
● CoreOS 618.0.0 alpha
● Kubernetes v.0.13.0
● flannel 0.3
● Foreman :)
● E = etcd
● K = Kubernetes master
● D = Docker Reg. mirror
● S = SkyDNS
● F = Frontend
● B = Backend
F
virt01
virt03 virt04
virt02
F
F
B
B
B
E E
EK
S
D
F

4. image: https://github.com/theforeman/foreman-graphics/blob/master/logo/foreman.png
Kubernetes
Deployment
● Deployment via Foreman
○ Templates to deploy Kubernetes on CoreOS with Foreman
○ https://github.com/johscheuer/theforeman-coreos-kubernetes
1. Deploy all 3 etcd Nodes
2. Deploy kubernetes master
3. Deploy kubernetes node01
4. Label node01 “type=docker-mirror”
5. Deploy docker-mirror service
6. Deploy kubernetes node11
7. Label node11 “type=skydns”

5. image: https://github.com/theforeman/foreman-graphics/blob/master/logo/foreman.png
Kubernetes
Deployment II
8. Deploy Kubernetes Skydns service
9. Deploy node02 + node03 + node04
10. Label node02 - node04 with “type=frontend”
11. Deploy node12 + node13 + node14
12. Label node12 - node14 with “type=backend”
That’s it :)

6. Kubernetes
Let’s Orchestrate

7. Kubernetes API http://kubernetes.io/third_party/swagger-ui/
Kubernetes
● Get your Kubernetes version
○ http://kube-master.minirz.inovex.de:8080/version
● Get the supported API versions
○ http://kube-master.minirz.inovex.de:8080/api
Controlling the Cluster with the api

8. Kubernetes API full documentation http://kubernetes.io/third_party/swagger-ui/
Kubernetes
● Get
○ Get’s the object or a list of objects
● Put
○ Update an object
● Post
○ Create an object
● Delete
○ Delete an object
● You can monitor/change your Kubernetes Cluster with the API
○ Show events, minions, nodes, endpoints, pods, replication controller,
services, select with namespaces
Controlling the Cluster with the api

9. Kubectl documentation: https://github.com/GoogleCloudPlatform/kubernetes/blob/master/docs/kubectl.md
Kubernetes
● Kubectl
○ Kubectl controls the Kubernetes cluster manager
● Same functionality like the API
● Allows easy creation of objects (kubectl guess the type)
○ ./kubectl create -f …
● Can make rolling updates
○ ./kubectl rollingupdate
Controlling the Cluster with Kubectl

10. Kubernetes
● kubectl resize --replicas=X rc <Replication Controller>
○ That’s it
Scaling the cluster

11. Kontakt
Johannes Maximilian Scheuermann
johannes.scheuermann@inovex.de
inovex GmbH
Office Karlsruhe
Ludwig-Erhard-Allee 6
76131 Karlsruhe
Thank you for listening!