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Effective Docker and Kubernetes for Java/Jakarta EE Developers

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Effective Docker and Kubernetes for Java/Jakarta EE Developers

This repository shows several key trade-offs to consider while using Docker and Kubernetes with Java/Jakarta EE applications. The repository hosts the demos for this talk or this lab (if you are utilizing the lab, please do look through the lab instructions). A video for the talk is here.

The basic Jakarta EE application used throughout is in the jakartaee folder.

Factors demostrated include:

  • Using thin WARs with Docker. The thin-war folder shows how this is done.
  • Using uber jars with Docker. The uber-jar folder shows how this is done.
  • Using hollow uber-jars with Docker. The hollow-uber-jar folder shows how this is done.
  • Administering applications through admin ports exposed out of Docker (as opposed to just deploying applications within Docker images). The exposed-port folder shows how this is done.
  • Auto-deploying applications through mounted external Docker volumes on the host (as opposed to deploying applications within Docker images). The external-volume folder shows how this is done.
  • How to make application server administration, clustering, autodiscovery and load-balancing work with Docker networking and Kubernetes cluster deployments. The kubernetes-clustering folder shows how this is done.
  • How your CI/CD pipeline looks like with Java/Jakarta EE, Docker and Kubernetes. The kubernetes-devops folder shows how this is done.

The demos use Jakarta EE 8, WebSphere Liberty, Azure Kubernetes Service (AKS) and Azure DevOps Pipelines.

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