Improve jdk 24 support and add docker-jdk24

build.gradle

@@ -562,7 +562,9 @@ application {
       // run `jcmd <PID> VM.native_memory` to check JVM native memory consumption
       "-XX:NativeMemoryTracking=summary",
       // 32Mb for Netty Direct ByteBuf
-      "-Dio.netty.maxDirectMemory=33554432"
+      "-Dio.netty.maxDirectMemory=33554432",
+      // avoids JDK 24+ warning
+      "--enable-native-access=ALL-UNNAMED"
   ]
 }
 
@@ -646,7 +648,7 @@ tasks.register("dockerDistUntar") {
 }
 
 def dockerImage = "consensys/teku"
-def dockerJdkVariants = [ "jdk21" ]
+def dockerJdkVariants = [ "jdk21", "jdk24" ]
 def dockerBuildDir = "build/docker-teku/"
 
 def executableAndArg = System.getProperty('os.name').toLowerCase().contains('windows') ? ["cmd", "/c"] : ["sh", "-c"]

docker/jdk24/Dockerfile

@@ -0,0 +1,64 @@
+FROM eclipse-temurin:24 as jre-build
+
+# Create a custom Java runtime
+RUN JAVA_TOOL_OPTIONS="-Djdk.lang.Process.launchMechanism=vfork" $JAVA_HOME/bin/jlink \
+         --add-modules java.se \
+         --add-modules jdk.httpserver \
+         --strip-debug \
+         --no-man-pages \
+         --no-header-files \
+         --compress=2 \
+         --output /javaruntime
+
+FROM ubuntu:24.04
+ENV JAVA_HOME=/opt/java/openjdk
+ENV PATH "${JAVA_HOME}/bin:${PATH}"
+COPY --from=jre-build /javaruntime $JAVA_HOME
+
+RUN apt-get -y update && apt-get -y upgrade && apt-get -y install curl libc-bin libc6 adduser && \
+    # Clean apt cache
+    apt-get clean && \
+    rm -rf /var/cache/apt/archives/* && \
+    rm -rf /var/lib/apt/lists/*
+
+# Ubuntu 23.10 and above comes with an "ubuntu" user with uid 1000. We need 1000 for teku.
+RUN userdel ubuntu 2>/dev/null || true && rm -rf /home/ubuntu  && \
+    adduser --uid 1000 --disabled-password --gecos "" --home /opt/teku teku && \
+    chown teku:teku /opt/teku && \
+    chmod 0755 /opt/teku
+
+USER teku
+WORKDIR /opt/teku
+
+# copy application (with libraries inside)
+COPY --chown=teku:teku teku /opt/teku/
+
+# Default to UTF-8 locale
+ENV LANG C.UTF-8
+
+ENV TEKU_REST_API_INTERFACE="0.0.0.0"
+ENV TEKU_VALIDATOR_API_INTERFACE="0.0.0.0"
+ENV TEKU_METRICS_INTERFACE="0.0.0.0"
+ENV PATH "/opt/teku/bin:${PATH}"
+
+# List Exposed Ports
+# Metrics, Rest API, LibP2P, Discv5
+EXPOSE 8008 5051 9000 9000/udp
+
+# specify default command
+ENTRYPOINT ["/opt/teku/bin/teku"]
+
+
+# Build-time metadata as defined at http://label-schema.org
+ARG BUILD_DATE
+ARG VCS_REF
+ARG VERSION
+LABEL org.label-schema.build-date=$BUILD_DATE \
+      org.label-schema.name="Teku" \
+      org.label-schema.description="Ethereum Consensus Client" \
+      org.label-schema.url="https://docs.teku.consensys.io/" \
+      org.label-schema.vcs-ref=$VCS_REF \
+      org.label-schema.vcs-url="https://github.com/Consensys/teku.git" \
+      org.label-schema.vendor="Consensys" \
+      org.label-schema.version=$VERSION \
+      org.label-schema.schema-version="1.0"