Unstoppable Cloud Infrastructure with OpenShift and Kubernetes Jan Kleinert • Josh Wood [email protected] • [email protected] March 22, 2019

@jankleinert / @joshixisjosh9 Jan Kleinert Developer Advocate, Red Hat twitter: @jankleinert github.com/jankleinert Hello! Josh Wood Developer Advocate, Red Hat twitter: @joshixisjosh9 github.com/joshix 2

@jankleinert / @joshixisjosh9 3 What is Kubernetes and why do we need it? Basic resource types What is OpenShift? Build, automate, iterate, collaborate What we’ll cover

@jankleinert / @joshixisjosh9 Why do we need Kubernetes? 4

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@jankleinert / @joshixisjosh9 8 What is Kubernetes?

@jankleinert / @joshixisjosh9 9 Kubernetes is... An open source platform for running container-based workloads and managing them at scale

@jankleinert / @joshixisjosh9 10 Kubernetes provides... An API API object primitives include these attributes: kind apiVersion metadata spec status

@jankleinert / @joshixisjosh9 11 Basic K8s Terminology 1. Control Plane 2. Node 3. Pod 4. Deployment 5. Service

@jankleinert / @joshixisjosh9 12 Control Plane ● The control plane implements loop(s), checking that actual state == desired state ● Controller - any control plane member implementing state reconciliation ● The default control plane schedules Pods onto cluster Nodes 


@jankleinert / @joshixisjosh9 13 Node ● Node: a host machine where containers run ● Each Node runs kubelet, the K8s agent

@jankleinert / @joshixisjosh9 14 Pod ● A group of one or more co-located containers ● Minimum unit of scale ● Pods run on Nodes, Replicas across them 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: {}

@jankleinert / @joshixisjosh9 15 https://youtu.be/E7KWcvuFVns

@jankleinert / @joshixisjosh9 16 Service ● Endpoint for dynamic group of pods ● Load Balances between them ● Default is exposed only in cluster 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: {}

@jankleinert / @joshixisjosh9 17 https://youtu.be/mkLNa_5w_58

@jankleinert / @joshixisjosh9 18 Deployment ● Scale handle: ● scale —replicas=x ● Deployment is a group of Pods, their ReplicaSets 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: {}

@jankleinert / @joshixisjosh9 19 https://youtu.be/1gjTeR4tsj0

@jankleinert / @joshixisjosh9 20 https://youtu.be/V8BOQhmC30w

@jankleinert / @joshixisjosh9 21 https://youtu.be/C8xAqfFaSLI

@jankleinert / @joshixisjosh9 22 https://youtu.be/YEkIAWFc9WE

@jankleinert / @joshixisjosh9 23 What is OpenShift?

@jankleinert / @joshixisjosh9 24 Registry Route Deployment Configuration Build Configuration Persistent Volume Claim Ingress Service Persistent Volume Replication Controller* Pod Image Stream Kubernetes and OpenShift

@jankleinert / @joshixisjosh9 25 Build Build and deploy container images

@jankleinert / @joshixisjosh9 26

@jankleinert / @joshixisjosh9 27

@jankleinert / @joshixisjosh9 28 Source to Image Combines source repos and operationally- maintained builder images to produce application images

@jankleinert / @joshixisjosh9 29 Source to Image Available as a standalone project, for use with Jenkins or other external builder processes: github.com/openshift/source-to-image

@jankleinert / @joshixisjosh9 30 Automate git push to deploy

@jankleinert / @joshixisjosh9 31

@jankleinert / @joshixisjosh9 32 Iterate

@jankleinert / @joshixisjosh9 33 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:


@jankleinert / @joshixisjosh9 34 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/

@jankleinert / @joshixisjosh9 35 Collaborate Share and replicate your success

@jankleinert / @joshixisjosh9 36 Service Catalog & Brokers

@jankleinert / @joshixisjosh9 37 Templates as Installers Install a template into the current project, making it easier to reuse: oc create -f template.json


@jankleinert / @joshixisjosh9 38 Templates as Installers Create an application from an installed template, from a file, or from a URL: oc new-app -f template.json


@jankleinert / @joshixisjosh9 39 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

@jankleinert / @joshixisjosh9 40 Interactive Learning Portal: https://learn.openshift.com Kubernetes By Example: http://kubernetesbyexample.com Kubernetes Docs: https://kubernetes.io OpenShift Docs: https://docs.openshift.com Resources

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