I mentioned this thread on the AdoptOpenJDK slack instance; it looks like
there's been talks around increased Docker base image coverage:
https://github.com/AdoptOpenJDK/openjdk-docker/issues/236 &
https://github.com/AdoptOpenJDK/openjdk-tests/issues/1109

On Tue, Oct 22, 2019 at 1:47 PM Mark Waite <[email protected]>
wrote:

> Yes, issues with musl vs. glibc were the key reason that I had heard for
> OpenJDK to not be willing to support Java 11 on Alpine.
>
> I don't see any mention of Alpine or Debian on the official images page
> at  https://hub.docker.com/_/adoptopenjdk .  There is mention of Alpine
> and Debian on the unofficial images page at
> https://hub.docker.com/r/adoptopenjdk/openjdk8 .  Is there somewhere that
> the difference between official and unofficial AdoptOpenJDK images is
> described?
>
> On Tue, Oct 22, 2019 at 7:30 AM Jim Crowley <[email protected]> wrote:
>
>> Mark,
>>
>> For Alpine are you referring to the issue with glibc vs musl? It looks
>> like the AdoptOpenJDK team built Alpine images with glibc install on top of
>> the base image. You can look at the Dockefile here,
>> https://github.com/AdoptOpenJDK/openjdk-docker/tree/master/8/jdk/alpine.
>>
>> I am loving the AdoptOpenJDK team's support for multiple platforms too! I
>> think it is also nice having all the OpenJ9 builds as well as Hotspot. Give
>> users more choice is a good thing! I am really hoping for an arm port of
>> OpenJ9 down the line!
>>
>> Let me know if you have any more questions!
>>
>> On Friday, October 18, 2019 at 6:54:08 PM UTC-4, Mark Waite wrote:
>>>
>>> Thanks very much for starting the discussion.
>>>
>>> I'm interested in evaluating the switch from OpenJDK to AdoptOpenJDK.
>>> I've been using JDK 8 and 11 hotspot builds from AdoptOpenJDK for many
>>> months with very good results.
>>>
>>> Several of the OpenJDK providers (Red Hat, Amazon, Azul) seem to be
>>> limiting their platform support much more than AdoptOpenJDK does.  So long
>>> as we can get the platforms we need (Debian, CentOS, UBI), I'm interested
>>> in evaluating the change.
>>>
>>> I thought there were specific barriers that prevent Alpine Linux
>>> support, though I see that Azul provides an Alpine Linux build for 8, 11,
>>> and 13.
>>>
>>> On Fri, Oct 18, 2019 at 2:09 PM Jim Crowley <[email protected]> wrote:
>>>
>>>> I posted this proposal on GitHub,
>>>> https://github.com/jenkinsci/docker/issues/893, but also wanted to get
>>>> the feedback of the community here.
>>>>
>>>>
>>>>
>>>>
>>>> As we start to look into supporting multiple architectures, we might
>>>> want to pivot from using OpenJDK to AdoptOpenJDK. There are couple reasons
>>>> behind this.
>>>>
>>>>
>>>>
>>>> First, it makes our build scripts and Dockerfiles easier to maintain.
>>>> Currently, in publish-experimental.sh, we have logic that handles pulling
>>>> from the “right” OpenJDK for a specific architecture. This could be remove
>>>> as the AdoptOpenJDK Docker image, https://hub.docker.com/_/adoptopenjdk,
>>>> has a manifest file that will handle pulling the correct image for the
>>>> given architecture.
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> Second, the OpenJDK image’s we are pulling from to build out our
>>>> multi-arch images, s390x/ openjdk:8-jdk, arm32v7/openjdk:8-jdk, etc. will
>>>> not be updated anymore. This has to do with OpenJDK not publishing
>>>> “official” binaries for these architectures. More information on this issue
>>>> can be found here,
>>>> https://github.com/docker-library/openjdk/issues/364#issuecomment-540821603
>>>> .
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> Third, this would pair nicely with the proposal to add OpenJ9,
>>>> https://github.com/jenkinsci/docker/issues/884. The AdoptOpenJDK image
>>>> has tags that support OpenJ9, so it should not be to much more work to
>>>> support this additional tag for our Jenkins images.
>>>>
>>>>
>>>>
>>>> The only roadblock right now is the base image/tag support the official
>>>> AdoptOpenJDK image on DockerHub. Currently, they only support an Ubuntu and
>>>> Widows Server Core base image. I talked with the Adopt team, Alpine and
>>>> Debian, Ubi base images are coming down the pipeline. This is aimed at the
>>>> next PR to the official DockerHub image repository. CentOS/ClefOS are also
>>>> coming but I do not have an ETA.
>>>>
>>>> Now we could wait for the official image or we could use the unofficial
>>>> images the Adopt team does produce. Using the unofficial images does
>>>> provide us with Alpine, Debian, etc support quicker. But they will be
>>>> unofficial images, which I know some users do not like to use.
>>>>
>>>>
>>>> Either way, I wanted to get community feedback! So please let me know
>>>> what you think of this proposal.
>>>>
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>>>> .
>>>>
>>>
>>>
>>> --
>>> Thanks!
>>> Mark Waite
>>>
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>> .
>>
>
>
> --
> Thanks!
> Mark Waite
>
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