Add multi-platform support (arm64/amd64) for Ubuntu 26.04 based images

.github/workflows/build.yml

@@ -39,13 +39,15 @@ jobs:
           ## Ubuntu 26.04 (latest)
           - context: openjdk-25/ubuntu/26.04
             imageTag: latest,25,25-ubuntu,25-ubuntu-26,25-ubuntu-2604,openjdk-25,openjdk-25-ubuntu,openjdk-25-ubuntu-26,openjdk-25-ubuntu-2604
+            platforms: linux/arm64,linux/amd64
           ## Ubuntu 24.04
           - context: openjdk-25/ubuntu/24.04
             imageTag: 25-ubuntu-24,25-ubuntu-2404,openjdk-25-ubuntu-24,openjdk-25-ubuntu-2404
           # JDK 21
           ## Ubuntu 26.04
           - context: openjdk-21/ubuntu/26.04
             imageTag: 21,21-ubuntu,21-ubuntu-26,21-ubuntu-2604,openjdk-21,openjdk-21-ubuntu,openjdk-21-ubuntu-26,openjdk-21-ubuntu-2604
+            platforms: linux/arm64,linux/amd64
           ## Ubuntu 24.04
           - context: openjdk-21/ubuntu/24.04
             imageTag: 21-ubuntu-24,21-ubuntu-2404,openjdk-21-ubuntu-24,openjdk-21-ubuntu-2404
@@ -84,6 +86,7 @@ jobs:
           dockerImage: "exoplatform/jdk"
           dockerFileContext: ${{ matrix.context }}
           dockerImageTag: ${{ matrix.imageTag }}
+          platforms: ${{ matrix.platforms }}
           attestImage: true
           DOCKER_USERNAME: ${{ secrets.DOCKER_USERNAME }}
           DOCKER_PASSWORD: ${{ secrets.DOCKER_PASSWORD }}

README.md

@@ -18,6 +18,8 @@
 | **openjdk-8 + Ubuntu 22.04**           | `8`, `8-ubuntu`, `8-ubuntu-22`, `8-ubuntu-2204`, `openjdk-8`, `openjdk-8-ubuntu`, `openjdk-8-ubuntu-22`, `openjdk-8-ubuntu-2204`                   | `openjdk-8/ubuntu/22.04/Dockerfile`  |
 | **openjdk-8 + Ubuntu 20.04**           | `8-ubuntu-20`, `8-ubuntu-2004`, `openjdk-8-ubuntu-20`, `openjdk-8-ubuntu-2004`                                                                     | `openjdk-8/ubuntu/20.04/Dockerfile`  |
 
+> **Multi-Architecture Support**: Starting from Ubuntu 26.04 (Resolute Raccoon), images are built for both `linux/amd64` and `linux/arm64` architectures. This allows running these JDK images on Apple Silicon (M1/M2/M3), AWS Graviton, and other ARM64-based systems. Images based on Ubuntu 24.04 and earlier are amd64 only.
+
 - [Quick reference](#quick-reference)
 - [How to use this image](#how-to-use-this-image)
 

openjdk-21/ubuntu/26.04/Dockerfile

@@ -22,6 +22,10 @@ RUN apt-get -qq update && \
 RUN apt-get -qq -y autoremove && \
     apt-get -qq -y clean && \
     rm -rf /var/lib/apt/lists/*
-ENV JAVA_HOME /usr/lib/jvm/zulu${JDK_MAJOR_VERSION}-ca-amd64
+
+# Create a symlink that points to the actual JDK location
+RUN ln -s /usr/lib/jvm/zulu${JDK_MAJOR_VERSION}-ca-$(dpkg --print-architecture) /usr/lib/jvm/zulu${JDK_MAJOR_VERSION}
+
+ENV JAVA_HOME /usr/lib/jvm/zulu${JDK_MAJOR_VERSION}
 
 ENTRYPOINT ["/usr/local/bin/tini", "--", "/usr/bin/java"]

openjdk-25/ubuntu/26.04/Dockerfile

@@ -22,6 +22,10 @@ RUN apt-get -qq update && \
 RUN apt-get -qq -y autoremove && \
     apt-get -qq -y clean && \
     rm -rf /var/lib/apt/lists/*
-ENV JAVA_HOME /usr/lib/jvm/zulu${JDK_MAJOR_VERSION}-ca-amd64
+
+# Create a symlink that points to the actual JDK location
+RUN ln -s /usr/lib/jvm/zulu${JDK_MAJOR_VERSION}-ca-$(dpkg --print-architecture) /usr/lib/jvm/zulu${JDK_MAJOR_VERSION}
+
+ENV JAVA_HOME /usr/lib/jvm/zulu${JDK_MAJOR_VERSION}
 
 ENTRYPOINT ["/usr/local/bin/tini", "--", "/usr/bin/java"]