Deprecation of openJDK docker images

[tech-6]

As of December 20th 2022 the openJDK images from the docker library were deprecated (see docker-library/openjdk@d2f1e2d and docker-library/openjdk#505). With this comes with a handful of questions for continuation of the reposilite docker images. Below are some choices to go with moving forward.

One base image to rule them all

Pick a new single base image for future reposilite images

• Amazon's Corretto JVM images
  • amazoncorretto:${JDK}-al2023 based off of Amazon Linux 2023
  • amazoncorretto:${JDK}-alpine based off Alpine Linux
• Eclipse's Temurin JVM images
  • eclipse-temurin:${JDK} based off Ubuntu
  • eclipse-temurin:${JDK}-alpine based off Alpine Linux
  • eclipse-temurin:${JDK}-windowsservercore based off Windows Server 2016 (I advise against this one)
• BellSoft Liberica JVM images
  • bellsoft/liberica-runtime-container:jre-${JDK}
• IBM Semeru (OpenJ9) JVM images
  • ibm-semeru-runtimes:open-${JDK} based off Ubuntu
• SapMachine JVM images
  • sapmachine:${JDK} based off Ubuntu

With one of these images rework the Dockerfile to use said image.
Example

How about all of them

Publish a build for x amount of base runtime images using artifacts from a build image. Allowing users to choose their preferred JVM runtime to run their repo with. A method of doing this could be using docker buildx bake to make a build job to build the JAR file and cache them for building the runtime images (which could be done in parallel).

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More commentary is wanted or more potential solutions. Many thanks.

[dzikoysk]

Hey, thanks for taking a look at it! I personally don't like an idea of having all of them - it adds a little bit of mess for no clear reason. I'd probably go for Liberica from BellSoft that is usually my go-to distribution.

An especially good reason for that in our case is that they're maintaining good old JRE targets:

• https://hub.docker.com/r/bellsoft/liberica-runtime-container/tags?name=jre-23

And those are just small out of the box. Of course we need to double-check if Reposilite is actually still able to start on it 👀

[tech-6]

Added the BellSoft images to the list of images, will take a look at them and hammer out a Dockerfile for it and add it to the to be tested pile.

[tech-6]

With the proposed change to the BellSoft Liberica base image. There will be compatibility issue that would require users of the current image to apply a fix while upgrading. More information about the changes is detailed out in #2289.