Build Java 11 Alpine

[ST-DDT]

On the java page there is a alpine compatible build for Java 11.

http://jdk.java.net/11/
https://download.java.net/java/early_access/alpine/19/binaries/openjdk-11-ea+19_linux-x64-musl_bin.tar.gz

Could you please build a docker image for that, so I could start testing Java 11 before Java 8 goes EOL this year?

Or is it required to appear in the official repository that was linked in some other issues https://pkgs.alpinelinux.org/packages?name=openjdk*&branch=edge ?

[keckelt]

I tinkered a bit today and wrote a Dockerfile with alpine 3.8 and the OpenJDK build: https://github.com/keckelt/openjdk11-alpine

It's my second Dockerfile, so I'm sure it could be improved. But it works.

[timbru31]

@keckelt - nice. One tip: delete the src.zip archive that's included to reduce the size (see e.g. here https://github.com/timbru31/docker-alpine-java-maven/blob/master/Dockerfile#L23)

[tianon]

Isn't src.zip useful to include for many use cases? (Especially since this is already the full JDK, so not exactly "slim".)

For context, the current openjdk:11-jdk image contains src.zip:

$ docker run --rm openjdk:11-jdk find /usr -name src.zip
/usr/lib/jvm/java-11-openjdk-amd64/src.zip

[tianon]

I'm a little bit concerned that this will be a divergence from our previous Alpine images (and will mean we can only support amd64), but given that https://bugs.alpinelinux.org/issues/8089 is still open and unresolved 9 months and 2 releases later, I think moving forward with the upstream-provided binaires for Alpine probably makes sense.

[tianon]

(It looks like we could even add the Early Access builds of OpenJDK 12 via this method, which would get the jump on Debian too.)

[tianon]

This is related to #212 too 👍

[nafeger]

The openjdk build for alpine was removed for jdk 11, there is only an EAP for jdk12. Should the default download for linux jdk work on a stock alpine image?

See this note: http://jdk.java.net/11/

The linked docker file does still work, however, it appears to not be a supported version ala this info