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rcktsci/java-tooling

By rcktsci

•Updated 2 days ago

Actual JDK releases based on Liberica JDK alpine musl with additional tools.

Image
Languages & frameworks
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rcktsci/java-tooling repository overview

⁠Overview

These are regularly updated images of JDK for LTS, previous and currect Java releases. Images are based on actual Bellsoft's Liberica JDK Alpine Musl⁠.

Source code (Dockerfiles, CI pipelines) is available here⁠.

⁠Available tags

⁠LTS releases:
  • 8
  • 11
  • 17
  • 21
  • 25
⁠Previous / current releases:
  • 26
⁠Additional tag suffixes
  • -gradle8 means latest gradle 8.x.x version installed, 9+ otherwise.
  • -code-coverage is deprecated and should not be used.

⁠Description

The target audience is a groups of developers who write applications using Maven/Gradle, using Testcontainers and packing their applications into container images. It is a common practice to split into separate CI jobs building of a .jar file and packing it into docker image but when your application has tests which use Testcontainers you probably already have local docker daemon which can build your image.

We install the latest versions of Maven, Gradle and docker command line tool, so you can build your Java application, pack it into own image and push to registry within a single CI/CD job.

We forcibly update all Alpine packages to the latest versions to increase security of newer image versions and have better change to pass the pipeline's container security analyzers.

Also, there are some commonly required packages installed:

  • jq
  • yq
  • git
  • curl
  • wget
  • tzdata
  • gettext
  • gcompat
  • yamllint
  • fontconfig
  • ttf-dejavu
  • busybox-extras

⁠Dockerfile

The effective Dockerfile for our images is:

ARG JAVA_VERSION
FROM bellsoft/liberica-openjdk-alpine-musl:${JAVA_VERSION}

# We have to keep this up to date.
ARG DOCKER_VERSION
ARG MAVEN3_VERSION
ARG GRADLE_VERSION

# Links to download binary files.
ARG DOCKER_CLI_URL="https://download.docker.com/linux/static/stable/x86_64/docker-$DOCKER_VERSION.tgz"
ARG MAVEN3_CLI_URL="https://archive.apache.org/dist/maven/maven-3/$MAVEN3_VERSION/binaries/apache-maven-$MAVEN3_VERSION-bin.zip"
ARG GRADLE_CLI_URL="https://services.gradle.org/distributions/gradle-${GRADLE_VERSION}-bin.zip"

# Add installation targets to PATH.
ENV PATH="/opt/apache-maven-$MAVEN3_VERSION/bin:/opt/gradle-$GRADLE_VERSION/bin:${PATH}"

ARG ADDITIONAL_ALPINE_PACKAGES="curl"

# Ultimately update OS packages.
# hadolint ignore=DL3017, DL3018, DL3019
RUN  echo "https://dl-cdn.alpinelinux.org/alpine/latest-stable/main"      >  /etc/apk/repositories \
  && echo "https://dl-cdn.alpinelinux.org/alpine/latest-stable/community" >> /etc/apk/repositories \
  && apk update \
  && apk upgrade --available \
  && apk add $ADDITIONAL_ALPINE_PACKAGES \
  && rm -rf /var/cache/apk/*

# ===== ===== ===== Install Docker CLI ===== ===== =====
RUN  curl -s -L -o /tmp/docker-$DOCKER_VERSION.tgz  $DOCKER_CLI_URL \
  && tar -x -z -C  /tmp -f /tmp/docker-$DOCKER_VERSION.tgz \
  && mv            /tmp/docker/docker  /usr/local/bin/ \
  && rm -f         /tmp/docker-$DOCKER_VERSION.tgz \
  && rm -rf        /tmp/docker \
  && docker --version \
  && echo "✔️ Docker CLI ${DOCKER_VERSION} installed."

# ===== ===== ===== Install Apache Maven ===== ===== =====
RUN  curl -s -L -o     /opt/apache-maven-$MAVEN3_VERSION-bin.zip  $MAVEN3_CLI_URL \
  && unzip -q -d /opt  /opt/apache-maven-$MAVEN3_VERSION-bin.zip \
  && rm -f             /opt/apache-maven-$MAVEN3_VERSION-bin.zip \
  && mvn --version \
  && echo "✔️ Maven ${MAVEN3_VERSION} installed."

# ===== ===== ===== Install Gradle ===== ===== =====
RUN  curl -s -L -o     /opt/gradle-$GRADLE_VERSION-bin.zip  $GRADLE_CLI_URL \
  && unzip -q -d /opt  /opt/gradle-$GRADLE_VERSION-bin.zip \
  && rm -f             /opt/gradle-$GRADLE_VERSION-bin.zip \
  && gradle --version \
  && echo "✔️ Gradle ${GRADLE_VERSION} installed."

⁠Examples of using our images

⁠GitLab CI job for simple Maven project
some-job:
  image: rcktsci/java-tooling:25
  services:
    - docker:28-dind
  variables:
    MAVEN_OPTS: "-Dmaven.repo.local=${CI_PROJECT_DIR}/.m2/repository"
  script:
    - docker run --rm -i hadolint/hadolint < Dockerfile
    - mvn --batch-mode verify
    - docker build --tag my-app .
    - docker push my-app
  cache:
    key: .m2
    paths:
      - .m2/repository
    when: always
  artifacts:
    reports:
      junit:
        - 'target/surefire-reports/TEST-*.xml'
        - 'target/failsafe-reports/TEST-*.xml'
      coverage_report:
        coverage_format: jacoco
        path: 'target/site/jacoco/jacoco.xml'
⁠GitLab CI job for simple Gradle project
some-job:
  image: rcktsci/java-tooling:25
  services:
    - docker:28-dind
  variables:
    GRADLE_USER_HOME: "$CI_PROJECT_DIR/.gradle"
  script:
    - docker run --rm -i hadolint/hadolint < Dockerfile
    - gradle --build-cache --info --stacktrace build
    - docker build --tag my-app .
    - docker push my-app
  cache:
    key: .gradle
    paths:
      - .gradle/caches/
      - .gradle/wrapper/
      - .gradle/build-cache/
    when: always
  artifacts:
    reports:
      junit:
        - 'build/test-results/test/TEST-*.xml'

⁠Images for GitLab Merge Request Code Coverage

Till GitLab now supports JaCoCo code coverage report⁠ itself, we stopping to provide special -code-coverage images.

⁠Notes about docker environment in GitLab CI.

When running on shared or personal runners your have to set some environment variables up to make docker command-line see the daemon in parallel service. In .gitlab-ci.yml:

variables:
  DOCKER_HOST: tcp://docker:2376
  DOCKER_TLS_CERTDIR: "/certs"
  DOCKER_TLS_VERIFY: 1
  DOCKER_CERT_PATH: "/certs/client"

Read its documentation⁠ carefully about that.

Tag summary

Content type

Image

Digest

sha256:2de888c15…

Size

291.3 MB

Last updated

2 days ago

docker pull rcktsci/java-tooling:26-docker28