Kubernetes and OpenShift for JavaScript Developers

You’ve probably heard of Kubernetes and OpenShift already. But do you know the reasons why you might use them and more importantly, as a developer, how to get started? I’ll cover the basics of Kubernetes and OpenShift and how they relate to each other, and then we’ll walk through the process of building and deploying an app that uses Node.js and React to OpenShift.

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1. Kubernetes and OpenShift For JavaScript Developers Jan Kleinert jan.kleinert@redhat.com March 8, 2019
2. @jankleinert 2 Jan Kleinert Developer Advocate, Red Hat twitter/github: @jankleinert Hello!
3. @jankleinert 3 What is Kubernetes and why do we need it? 4 basic resource types What is OpenShift? Build, automate, iterate, collaborate What we’ll cover
4. @jankleinert 4 What app are we deploying?
5. @jankleinert Why do we need Kubernetes? 5
6. @jankleinert 6 What is Kubernetes?
7. @jankleinert 7 Kubernetes is... An open source platform for running container-based workloads and managing them at scale
8. @jankleinert 8 Kubernetes provides... An API API object primitives include these attributes: kind apiVersion metadata spec status
9. @jankleinert 9 Basic K8s Terminology 1. node 2. pod 3. service 4. deployment
10. @jankleinert 10 Node • Node: a host machine where containerized processes run • Node activity is managed via one or more Master instances
11. @jankleinert 11 Pod • A group of one or more co-located containers • Minimum unit of scale kind: Pod apiVersion: v1 metadata: creationTimestamp: name: hello-k8s labels: run: hello-k8s spec: containers: - name: hello-k8s image: jkleinert/raleigh-dogparks:v1 ports: - containerPort: 8080 resources: {}
12. @jankleinert 12 https://youtu.be/E7KWcvuFVns
13. @jankleinert 13 Service • Acts as a single endpoint for a collection of replicated pods • Like a load balancer kind: Service apiVersion: v1 metadata: name: hello-k8s creationTimestamp: labels: run: hello-k8s spec: ports: - protocol: TCP port: 8080 targetPort: 8080 selector: run: hello-k8s type: LoadBalancer status: loadBalancer: {}
14. @jankleinert 14 https://youtu.be/mkLNa_5w_58
15. @jankleinert 15 Deployment • Helps you specify container runtime requirements (in terms of pods) kind: Deployment
 apiVersion: apps/v1beta1
 metadata:
 name: hello-k8s
 creationTimestamp: 
 labels:
 run: hello-k8s
 spec:
 replicas: 1
 selector:
 matchLabels:
 run: hello-k8s
 template:
 metadata:
 creationTimestamp: 
 labels:
 run: hello-k8s
 spec:
 containers:
 - name: hello-k8s
 image: jkleinert/raleigh-dogparks:v1
 resources: {}
 strategy: {}
 status: {}
16. @jankleinert 16 https://youtu.be/1gjTeR4tsj0
17. @jankleinert 17 https://youtu.be/V8BOQhmC30w
18. @jankleinert 18 https://youtu.be/C8xAqfFaSLI
19. @jankleinert 19 https://youtu.be/YEkIAWFc9WE
20. @jankleinert 20 What is OpenShift?
21. @jankleinert 21 Build Build and deploy container images
22. @jankleinert 22 Source to Image Combines source repos and operationally- maintained builder images to produce application images
23. @jankleinert 23 Source to Image Available as a standalone project, for use with Jenkins or other external builder processes: github.com/openshift/source-to-image
24. @jankleinert 24 Automate git push to deploy
25. @jankleinert 25 Iterate
26. @jankleinert 26 oc rsync Useful for testing changes prior to a commit Copies files to a container; use the --watch flag to continuously sync oc rsync --exclude='node_modules*' . YOUR_PODNAME:

27. @jankleinert 27 odo (OpenShift Do) A developer-focused command line tool for fast, iterative development on OpenShift https://github.com/redhat-developer/odo https://learn.openshift.com/introduction/developing-with-odo/
28. @jankleinert 28 Collaborate Share and replicate your success
29. @jankleinert 29 Service Catalog & Brokers
30. @jankleinert 30 Templates as Installers Install a template into the current project, making it easier to reuse: oc create -f template.json

31. @jankleinert 31 Templates as Installers Create an application from an installed template, from a file, or from a URL: oc new-app -f template.json

32. @jankleinert 32 Multi-service App Example Node.js and MongoDB multi-service app oc create -f https://raw.githubusercontent.com/ openshift-roadshow/nationalparks-js/master/ nationalparks-js.json
33. @jankleinert 33 Kubernetes By Example: http://kubernetesbyexample.com Interactive Learning Portal: https://learn.openshift.com Backend repo: https://github.com/jankleinert/k8s-visualizer-backend Frontend repo: https://github.com/jankleinert/k8s-visualizer-frontend Raleigh dog parks repo: https://github.com/jankleinert/raleigh-dogparks Resources
34. THANK YOU plus.google.com/+RedHat linkedin.com/company/red-hat youtube.com/user/RedHatVideos facebook.com/redhatinc twitter.com/RedHat