first practical introduction to Kubernetes and Openshift. container orchestration systems. the slides are meant as a quick introduction to Kubernetes/Openshift to prepare for the hands-on demo.

1. P R ACT IC A L IN T RO DUCT IO N TO O R CH EST R AT IO N :
K UBE R N E T E S/O P ENSH IFT
DH A H R A N DO CKER M EET U P
10T H NOV EM BER 2017
BY : WA LID S H A A R I

2. System engineer, passionate about Open source working for a large enterprise
with anti DevOps patterns. Recently working with network team on evaluating
Network Automation for multi vendor data center.
@walidshaari
walid.shaari@linux.com
https://www.linkedin.com/in/walidshaari/
https://medium.com/@walidshaari/
https://github.com/walidshaari/Kubernetes-Certified-Administrator
$oc whoami
RHCA IV

3. Thank you, our sponsor, TAM
Development LLC for hosting the
Dhahran Docker meetup.
Thank you Mustafa Dahab for
presenting TAM Development LLC
Rancher, and Docker in production.

4. 3
Google trends

5. 4

6. 5
Kubernetes wining
the infrastructure war

7. Open-source system for automating
deployment, scaling, and management
of containerized applications.
KUBERNETES
6

8. 7
Borg
Mesos
Omega
Kubernetes
Hashicorp Nomad
Docker swarm
Rancher Cattle
15 years of experience of running production workloads at Google

9. 8
Why Invest in Kubernetes?
What problems Kubernetes/Openshift solve?
Use Cases

10. PORTABILITY
9
AKS

11. RESILIENCY
10

12. ELASTICITY
11
https://cloudplatform.googleblog.com/2016/09/bringing-Pokemon-GO-to-life-on-Google-Cloud.html

13. BUILDING DISTRIBUTED PLATFORMS
12
Helm, charts, tiller and MonocularSERVERLESS PLATFORMS
KubeApps.com
Istio
Rich ECO system to build distributed applications

14. Among more and more other use cases
13
https://kubernetes.io/case-studies/

15. 14
GETTING STARTED

16. 15
• Openshift is an opiniated Kubernetes - you can use Kubectl Kubernetes client to interact with an OpenShift
cluster
• Red Hat does not use all the Kubernetes abstractions “Objects”, however, they have their own and wrap
around standard Kubernetes objects. e.g. Openshift router vs. K8s ingress controller.
• Medium: difference between kubernetes and openshift
Openshift relationship to Kubernetes

17. 16
• Enhanced Security
• Ease of deployments in different scenarios (e.g. disconnected, standalone, HA, Azure, ..etc)
• Enterprise level support
• Opinionated architecture and out of the box platform
• Focus on what is more important e.g. PaaS FaaS not CaaS
• Easy plumbing and pipelines for developers and ops alike.
• You can still use K8s under the hood.
Why Openshift not Kubernetes?
Medium: difference between kubernetes and openshift

18. K8S Cluster architecture

19. Openshift objects
Where is the container object?

20. 19
minishift
https://docs.openshift.org/latest/minishift/getting-started/installing.html
Install local utilities: kubectl and minikube
https://kubernetes.io/docs/tasks/tools/install-kubectl/
Checkout the Kubernetes docs
https://kubernetes.io/docs/home/

21. 20
masters-imac:~ master$ minishift oc-env
export PATH="/Users/master/.minishift/cache/oc/v3.6.0:$PATH"
# Run this command to configure your shell:
# eval $(minishift oc-env)
masters-imac:~ eval $(minishift oc-env)
minishift

22. 21
masters-imac:~ master$ minishift oc-env
export PATH="/Users/master/.minishift/cache/oc/v3.6.0:$PATH"
# Run this command to configure your shell:
# eval $(minishift oc-env)
masters-imac:~ eval $(minishift oc-env)
minishift

23. 22
oc completion bash > oc-completion.sh
source oc-completion.sh
oc version
oc help
oc types
oc new-project
oc get projects
oc get namespaces
kubectl completion bash > k8s-completion.sh
source k8s-completion.sh
kubectl version
Kubectl help
Kubectl get projects
Kubectl get namespaces
Can kubectl create a namespace ? How about a project?
Client tools demo

24. 23
Pods are the core Kubernetes Component
masters-imac:~ master$ oc run mypod --image=gcr.io/kuar-demo/kuard-amd64:1
deploymentconfig "mypod" created
masters-imac:~ master$ oc run myotherpod --image=gcr.io/kuar-demo/kuard-amd64:2
deploymentconfig "myotherpod" created
masters-imac:~ master$ kubectl get pods
NAME READY STATUS RESTARTS AGE
myotherpod-1-33xmq 0/1 ContainerCreating 0 2m
myotherpod-1-deploy 1/1 Running 0 2m
mypod-1-6p37m 1/1 Running 0 2m
masters-imac:~ master$ kubectl get pods
NAME READY STATUS RESTARTS AGE
myotherpod-1-33xmq 0/1 ContainerCreating 0 2m
myotherpod-1-deploy 1/1 Running 0 2m
mypod-1-6p37m 1/1 Running 0 2m
masters-imac:~ master$ oc get pods
NAME READY STATUS RESTARTS AGE
myotherpod-1-33xmq 1/1 Running 0 3m
mypod-1-6p37m 1/1 Running 0 4m

25. Pod
Kurad:1
Project/name space

26. 25
But what did Openshift add to Docker run?
masters-imac:~ master$ oc get all
NAME REVISION DESIRED CURRENT TRIGGERED BY
dc/myotherpod 1 1 1 config
dc/mypod 1 1 1 config
NAME DESIRED CURRENT READY AGE
rc/myotherpod-1 1 1 1 8m
rc/mypod-1 1 1 1 8m
NAME READY STATUS RESTARTS AGE
po/myotherpod-1-33xmq 1/1 Running 0 8m
po/mypod-1-6p37m 1/1 Running 0 8m

27. 26
But what did Openshift add to Docker run?
masters-imac:~ master$ oc get rc
NAME DESIRED CURRENT READY AGE
rc/myotherpod-1 1 1 1 8m
rc/mypod-1 1 1 1 8m
Replication Controllers provides extra feature to pods such as rolling update:
$ kubectl rolling-update NAME [NEW_NAME] --image=IMAGE:TAG
// Update pods of frontend-v1 using new replication controller data in frontend-v2.json.
$ kubectl rolling-update frontend-v1 -f frontend-v2.json
// Update pods of frontend-v1 using JSON data passed into stdin.
$ cat frontend-v2.json | kubectl rolling-update frontend-v1 -f -

29. 28

30. 29
Is my Cluster healthy or not?

31. 30
Demo time

32. 31
What is next?
https://learn.openshift.com/
https://www.katacoda.com/courses/openshift
https://www.katacoda.com/courses/kubernetes
https://www.katacoda.com/courses/istio/deploy-istio-on-kubernetes
https://www.katacoda.com/courses/prometheus
https://kubernetes.io/

33. 32
Ad-hoc practical demo