Skaffold for Java: Continuous Development for Kubernetes

Originally presented at Oracle Code One 2018.

Skaffold: https://github.com/GoogleContainerTools/skaffold
Jib: https://github.com/GoogleContainerTools/jib
Demo project: https://github.com/coollog/skaffold-code.one

Session Description:

Skaffold is a command-line tool that facilitates continuous development for Kubernetes applications. You can iterate on your application source code locally and then deploy to local or remote Kubernetes clusters. Skaffold handles the workflow for building, pushing, and deploying your application. This session explores developing a Java application with Skaffold. This session presents and demos Java development on Kubernetes orchestrated by Skaffold and integrated with standard Java building tooling (Maven/Gradle).

Transcript

1. Continuous Development for Kubernetes Skaffold for Java github.com/GoogleContainerTools/skaffol d
2. Skaffold github.com/GoogleContainerTools/skaffold
3. Cloud Tools for Java Appu Goundan @loosebazooka Qingyang “Q” Chen @coollog
4. Skaffold is a command line tool that facilitates continuous development for Kubernetes applications. You can iterate on your application source code locally then deploy to local or remote Kubernetes clusters. Skaffold handles the workflow for building, pushing and deploying your application. It can also be used in an automated context such as a CI/CD pipeline to leverage the same workflow and tooling when moving applications to production. github.com/GoogleContainerTools/skaffold official website
5. "Dev"
6. Build $ ./gradlew assemble
7. Containerize $ ./gradlew assemble $ docker build . -t gcr.io/co-repo/co-app:v9
8. Push $ ./gradlew assemble $ docker build . -t gcr.io/co-repo/co-app:v9 $ docker push gcr.io/co-repo/co-app:v9
9. Deploy $ ./gradlew assemble $ docker build . -t gcr.io/co-repo/co-app:v9 $ docker push gcr.io/co-repo/co-app:v9 $ vi co-deployment.yaml $ kubectl apply -f co-deployment.yaml
10. Connect $ ./gradlew assemble $ docker build . -t gcr.io/co-repo/co-app:v9 $ docker push gcr.io/co-repo/co-app:v9 $ vi co-deployment.yaml $ kubectl apply -f co-deployment.yaml $ kubectl get pods $ kubectl port-forward co-pod-qx54dw 8080:8080 $ kubectl logs -f co-pod-qx54dw
12. code build push Development Process deploy application connect k8s config update Things I care about Things I wish would just happen
13. Skaffold $ skaffold dev
14. skaffold code Development Process application k8s config
15. Demo
16. Skaffold Workflow
17. apiVersion: skaffold/v1alpha4 kind: Config build: artifacts: - image: gcr.io/appu-learn/skaffold-talk context: app deploy: kubectl: manifests: - k8s-* Simple Skaffold Config kind: Deployment ... spec: template: spec: containers: - image: gcr.io/appu-learn/skaffold-talk ports: - containerPort: 8080 skaffold.yaml k8s-deployment.yaml
18. Pluggable
22. Demo
23. What about Java? What about Jib?
24. github.com/GoogleContainerTools/jib 1. Apply the plugin. 1. Apply the plugin. 2. gradle jib Steps: (or mvn jib:build)
25. Jib ❤ Skaffold
26. Jib
27. apiVersion: skaffold/v1alpha4 kind: Config build: artifacts: - imageName: gcr.io/appu-learn/skaffold-talk jibGradle: {} deploy: kubectl: manifests: - k8s-* Simple skaffold.yaml (powered up with Jib) apiVersion: skaffold/v1alpha4 kind: Config build: artifacts: - imageName: gcr.io/appu-learn/skaffold-talk jibMaven: {} deploy: kubectl: manifests: - k8s-*
28. apiVersion: skaffold/v1alpha4 kind: Config build: artifacts: - imageName: gcr.io/appu-learn/skaffold-talk jibGradle: project: subproject deploy: kubectl: manifests: - k8s-* apiVersion: skaffold/v1alpha4 kind: Config build: artifacts: - imageName: gcr.io/appu-learn/skaffold-talk jibMaven: profile: skaffold module: submodule deploy: kubectl: manifests: - k8s-* Simple skaffold.yaml (powered up with Jib)
29. Lets see this in action!
30. Survey App frontend-service Groovy/Micronaut/Gradle / cast votes vote-service Java/Spring/Gradle /results view results notification-service NodeJS
31. apiVersion: skaffold/v1alpha4 kind: Config build: artifacts: - image: gcr.io/qingyangc-sandbox/codeone-frontend jibGradle: {} context: frontend-service - image: gcr.io/qingyangc-sandbox/codeone-vote jibGradle: {} context: vote-service - image: gcr.io/qingyangc-sandbox/codeone-notification context: notification-service skaffold.yaml
32. skaffold dev github.com/coollog/skaffold-code.one
33. skaffold-code.one github.com/coollog/skaffold-code.one
34. Other features - skaffold run - skaffold build - remote file sync - --trigger=manual Future features - Debugger - Test phase - IDE support - skaffold init with Jib - Beta
35. github.com/GoogleContainerTools/skaffold github.com/GoogleContainerTools/jib github.com/coollog/skaffold-code.one