Changes to support RHEL7/s390x image creation and devkit inclusion

FAQ.md

@@ -85,16 +85,30 @@ have at the moment:
 | Dockerfile | Image | Platforms  | Where is this built? | In use?
 |---|---|---|---|---|
 | [Centos7](./ansible/docker/Dockerfile.CentOS7) | [`adoptopenjdk/centos7_build_image`](https://hub.docker.com/r/adoptopenjdk/centos7_build_image) | linux on amd64, arm64, ppc64le | [Jenkins](https://ci.adoptium.net/job/centos7_docker_image_updater/) | Yes
+| [RHEL7](./ansible/docker/Dockerfile.RHEL7) | n/a - restricted (*) | s390x | [Jenkins](https://ci.adoptium.net/job/rhel7_docker_image_updater/) | Yes
 | [Centos6](./ansible/docker/Dockerfile.CentOS6) | [`adoptopenjdk/centos6_build_image`](https://hub.docker.com/r/adoptopenjdk/centos6_build_image)| linux/amd64 | [GH Actions](.github/workflows/build.yml) | Yes
 | [Alpine3](./ansible/docker/Dockerfile.Alpine3) | [`adoptopenjdk/alpine3_build_image`](https://hub.docker.com/r/adoptopenjdk/alpine3_build_image) | linux/x64 & linux/arm64 | [Jenkins](https://ci.adoptium.net/job/centos7_docker_image_updater/) | Yes
 | [Ubuntu 20.04 (riscv64 only)](./ansible/docker/Dockerfile.Ubuntu2004-riscv64) | [`adoptopenjdk/ubuntu2004_build_image:linux-riscv64`](https://hub.docker.com/r/adoptopenjdk/ubuntu2004_build_image) | linux/riscv64 | [Jenkins](https://ci.adoptium.net/job/centos7_docker_image_updater/) | Yes
 
+<details>
+<summary>(*) - Caveats:</summary>
+
+The RHEL7 image creation for s390x has to be run on a RHEL host using a
+container implementation supplied by Red Hat, and we are using RHEL8 for
+this as it has a stable implemention.  The image creation requires the
+following:
+
+1. The host needs to have an active RHEL subscription
+2. The RHEL7 devkit (which cannot be made public) to be available in a tar file under /usr/local on the host as per the name in the Dockerfile
+</details>
+
 When a change lands into master, the relevant dockerfiles are built using
 the appropriate CI system listed in the table above by configuring them with
-the ansible playbooks and pushing them up to Docker Hub where they can be
-consumed by our jenkins build agents when the `DOCKER_IMAGE` value is
-defined on the jenkins build pipelines as configured in the
-[pipeline_config files](https://github.com/AdoptOpenJDK/ci-jenkins-pipelines/tree/master/pipelines/jobs/configurations).
+the ansible playbooks and - with the exception of the RHEL7 image for s390x -
+pushing them up to Docker Hub where they can be consumed by our jenkins
+build agents when the `DOCKER_IMAGE` value is defined on the jenkins build
+pipelines as configured in the [pipeline_config
+files](https://github.com/AdoptOpenJDK/ci-jenkins-pipelines/tree/master/pipelines/jobs/configurations).
 
 ### Adding a new dockerBuild dockerhub repository
 

ansible/docker/Dockerfile.RHEL7

@@ -1,10 +1,5 @@
 FROM registry.access.redhat.com/rhel7
-# This dockerfile should be built using this from the top level of the repository:
-#  ROSIPW=******* docker build --no-cache -t rhel7_build_image -f ansible/docker/Dockerfile.RHEL7 --build-arg ROSIUSER=******* --secret id=ROSIPW --build-arg git_sha="$(git rev-parse --short HEAD)" `pwd`
-ARG ROSIUSER
-RUN sed -i 's/\(def in_container():\)/\1\n    return False/g' /usr/lib64/python*/*-packages/rhsm/config.py
-RUN --mount=type=secret,id=ROSIPW,required=true subscription-manager register --username=${ROSIUSER} --password="$(cat /run/secrets/ROSIPW)" --auto-attach
-RUN subscription-manager repos --enable rhel-7-for-system-z-optional-rpms
+RUN yum-config-manager --enable rhel-7-for-system-z-optional-rpms
 # ^^ Optional repo needed for Xvfb
 
 ARG git_sha
@@ -15,6 +10,7 @@ RUN yum --enablerepo=rhel-7-server-ansible-2-for-system-z-rpms install -y ansibl
 RUN yum clean all
 
 COPY . /ansible
+COPY devkit /usr/local/devkit
 
 RUN echo "localhost ansible_connection=local" > /ansible/hosts
 
@@ -31,7 +27,10 @@ RUN useradd -c "Jenkins user" -d /home/${user} -u 1002 -g 1003 -m ${user}
 ENV \
     JDK7_BOOT_DIR="/usr/lib/jvm/java-1.7.0-openjdk" \
     JDK8_BOOT_DIR="/usr/lib/jvm/java-1.8.0-openjdk" \
-    JDK10_BOOT_DIR="/usr/lib/jvm/jdk-10" \
     JAVA_HOME="/usr/lib/jvm/java-1.8.0-openjdk"
-RUN subscription-manager unregister
 
+# While this does bloat the image it is required for building the
+# devkit, and the process for that runs as non-root ...
+# Disabled for now as we're going to copy from /usr/local/devkit on the host
+RUN yum clean all
+RUN yum reinstall --downloadonly glibc glibc-headers glibc-devel cups-libs cups-devel libX11 libX11-devel xorg-x11-proto-devel alsa-lib alsa-lib-devel libXext libXext-devel libXtst libXtst-devel libXrender libXrender-devel libXrandr libXrandr-devel freetype freetype-devel libXt libXt-devel libSM libSM-devel libICE libICE-devel libXi libXi-devel libXdmcp libXdmcp-devel libXau libXau-devel libgcc libxcrypt zlib zlib-devel libffi libffi-devel fontconfig fontconfig-devel kernel-headers

ansible/playbooks/AdoptOpenJDK_Unix_Playbook/main.yml

@@ -94,6 +94,7 @@
       when:
         - (ansible_distribution != "Alpine" or ansible_architecture != "aarch64")
         - ansible_architecture != "riscv64"
+        - ansible_architecture != "s390x"
       tags: build_tools
     - role: adoptopenjdk_install  # JDK11 Build Bootstrap
       jdk_version: 10
@@ -120,6 +121,7 @@
         - ansible_distribution != "Solaris"
         - ansible_architecture != "riscv64"
         - ansible_architecture != "armv7l"
+        - ansible_architecture != "s390x"
       tags: build_tools
     - role: adoptopenjdk_install  # Current LTS
       jdk_version: 21