From 0 to Production with Kubernetes Native Java @RivieraDev

@kevindubois @alexsotob From 0 to Production with Kubernetes Native Java
Kevin Dubois Principal Developer Advocate Red Hat Alex Soto Bueno Director of Developer Experience Red Hat

@kevindubois @alexsotob Alex Soto (@alexsotob) • @alexsotob • [email protected] •
Currently Red Hat’s Director of Developer Experience • Featured speaker at technology events • A Java Champion since 2017 • Writer, University Professor, Radio collaborator

@kevindubois @alexsotob Kevin Dubois 🤘 Principal Developer Advocate at Red
Hat 🤘 Java Champion 🤘 Based in Belgium 󰎐 🤘 Speak English, Dutch, French, Italian 🤘 Open Source Contributor (Quarkus, Camel, Knative, ..) 🤘 Open Source Community Member (Belgian JUG, Belgian CNCF chapter) @[email protected] youtube.com/@thekevindubois github.com/kdubois

@kevindubois @alexsotob “Kube Native” Java !?

@kevindubois @alexsotob “Traditional” • Throughput at the expense of footprint
• Long running at expense of startup speed • Rich, dynamic behaviour for mutable systems Kube Native • Throughput solved by scaling • Ephemeral, immutable systems • Footprint and startup speed matter

@kevindubois @alexsotob JVM Scaling * Graph is based on actual
lab results at Red Hat

@kevindubois @alexsotob When you can’t scale fast enough…

@kevindubois @alexsotob Quarkus + Native (via GraalVM) 12 MB Quarkus
+ JVM (via OpenJDK) 73 MB Traditional Cloud-Native Stack 136 MB Quarkus + Native (via GraalVM) 0.016 Seconds Quarkus + JVM (via OpenJDK) 0.943 Seconds Traditional Cloud-Native Stack 4.3 Seconds Supersonic. Subatomic. Java

@kevindubois @alexsotob Let’s start building our app!

@kevindubois @alexsotob

@kevindubois @alexsotob @kevindubois

@kevindubois @alexsotob Container Running Sends traffic App not ready Ready??

@kevindubois @alexsotob After 2.6s (Kafka, DB, Caching) App is ready
to receive traffic Container Running Sends traffic App not ready Ready??

@kevindubois @alexsotob Downtime of 2.6s Ready??

@kevindubois @alexsotob https://microprofile.io/

@kevindubois @alexsotob readinessProbe: httpGet: path: /health port: 8080 initialDelaySeconds: 10
periodSeconds: 3 Ready!

@kevindubois @alexsotob containers: - name: nginx-container image: nginx:latest ports: -
containerPort: 80 volumes: - name: secret-volume secret: secretName: your-secret-name Kubernetes Secrets

@kevindubois @alexsotob resources: requests: memory: "300Mi" cpu: "250m" # 1/4
core limits: memory: "400Mi" cpu: "1000m" # 1 core Resource Limits

@kevindubois @alexsotob CPU Request More CPU Limit State your intentions

@kevindubois @alexsotob Memory Request More Memory Limit Burstable

@kevindubois @alexsotob Memory Request Limit Guaranteed

@kevindubois @alexsotob https://learn.microsoft.com/en-us/azure/developer/java/containers/overview vCPU cores Memory Heap Size GC Replicas
2 4Gb 75% Parallel 2 Some sensible starting numbers

@kevindubois @alexsotob https://learn.microsoft.com/en-us/azure/developer/java/containers/overview resources: requests: memory: "4000Mi" cpu: "2000m" limits:
memory: "4000Mi" cpu: "2000m" - env: - name: JDK_JAVA_OPTIONS value: "-XX:+UseParallelGC -XX:MaxRAMPercentage=75" Sensible Initial Values ( JVM )

@kevindubois @alexsotob spec: affinity: podAffinity: requiredDuringSchedulingIgnoredDuringExecution: - labelSelector: matchExpressions: -
key: "app" operator: In values: - my-app topologyKey: "kubernetes.io/hostname" containers: Pod Affinity = lower latency

@kevindubois @alexsotob @kevindubois @alexsotob Observability

@kevindubois @alexsotob Ready for Production!

@kevindubois @alexsotob Push to give energy windmill Kafka Topic 2.Sends
the interaction Dashboard: Green Energy Nickname Team Push/Tap to generate energy Cars that need energy Two teams competing (top 5 players) First team wins @kevindubois @alexsotob

@kevindubois @alexsotob Architecture 3: Generate power (REST) Game Dashboard 1:
Assign player Name & Team (REST) 6: Update dashboard (SSE) 2: Increment player cluster counter 4: Send power event 5: Receive power events

@kevindubois @alexsotob YOU PLAY! Scan the QR Code with your
phone to play

@kevindubois @alexsotob

@kevindubois @alexsotob @kevindubois @alexsotob What is GitOps?

@kevindubois @alexsotob Treat everything as code Git Commands Infrastructure as
Code Operations through Git workflows Git Repository Git is the single source of truth @kevindubois @alexsotob What is GitOps?

@kevindubois @alexsotob Pull Request Source Git Repository Image Registry Config
Git Repository Kubernetes Deploy Monitor Detect drift CD Take action GitOps Application Delivery Model

@kevindubois @alexsotob Shaking Time :)

@kevindubois @alexsotob V2 Scan the QR Code with your phone
to play

@kevindubois @alexsotob github.com/kdubois/quarkus-kubernetes-kafka-db github.com/redhat-developer-demos/quinoa-wind-turbine

@kevindubois @alexsotob Free Developer e-Books & Tutorials! developers.redhat.com/eventtutorials

@kevindubois @alexsotob Start exploring in the OpenShift Sandbox. Learn containers,
Kubernetes, and OpenShift in your browser. developers.redhat.com/developer-sandbox Try Red Hat's products and technologies without setup or configuration.

@kevindubois @alexsotob @alexsotobu lordofthejars @alexsotob @thekevindubois kdubois @kevindubois

From 0 to Production with Kubernetes Native Jav...

From 0 to Production with Kubernetes Native Java @RivieraDev

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