Chainguard Container for liberica-jre

Free and open source Progressive Java Runtime for modern Java deployments

Chainguard Containers are regularly-updated, secure-by-default container images.

Download this Container Image

For those with access, this container image is available on cgr.dev:

docker pull cgr.dev/ORGANIZATION/liberica-jre:latest

Be sure to replace the ORGANIZATION placeholder with the name used for your organization's private repository within the Chainguard Registry.

Compatibility Notes

The Chainguard version of Liberica JRE is a minimal, secure, and regularly updated container image designed to run Java applications. It leverages the security features of Chainguard Images, including low-to-zero CVEs, automated nightly builds, high-quality SBOMs, verifiable signatures, and reproducible builds.

Getting Started

To test the Chainguard version of Liberica JRE, you can use the following examples:

Running a Simple Java Application

Create a Java application, such as this HelloWorld.java example:

public class HelloWorld {
    public static void main(String[] args) {
        System.out.println("Hello, World!");
    }
}

Compile the application:

javac HelloWorld.java

Create a Dockerfile to build the image:

FROM cgr.dev/chainguard/liberica-jre:latest
COPY HelloWorld.class /app/
WORKDIR /app
CMD ["java", "HelloWorld"]

Build and run the Docker image:

docker build -t hello-world .
docker run --rm hello-world

You will see the application output:

Hello, World!

Running a Java Application with Dependencies

If your Java application has dependencies, you can use a build tool like Maven. Create a pom.xml file for your project and a Java application:

<project>
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.example</groupId>
    <artifactId>hello-world</artifactId>
    <version>1.0-SNAPSHOT</version>
    <dependencies>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
            <version>3.12.0</version>
        </dependency>
    </dependencies>
</project>

import org.apache.commons.lang3.StringUtils;

public class HelloWorld {
    public static void main(String[] args) {
        System.out.println(StringUtils.capitalize("hello, world!"));
    }
}

Create a Dockerfile to build the image:

FROM maven:3.8.4-openjdk-11 AS build
COPY pom.xml /app/
COPY src /app/src
WORKDIR /app
RUN mvn package

FROM cgr.dev/chainguard/liberica-jre:latest
COPY --from=build /app/target/hello-world-1.0-SNAPSHOT.jar /app/hello-world.jar
WORKDIR /app
CMD ["java", "-jar", "hello-world.jar"]

Build and run the Docker image:

docker build -t hello-world .
docker run --rm hello-world

You will see the output returned by the application:

Hello, world!

What are Chainguard Containers?

Chainguard Containers are minimal container images that are secure by default.

In many cases, the Chainguard Containers tagged as :latest contain only an open-source application and its runtime dependencies. These minimal container images typically do not contain a shell or package manager. Chainguard Containers are built with Wolfi, our Linux undistro designed to produce container images that meet the requirements of a more secure software supply chain.

The main features of Chainguard Containers include:

• Minimal design, without unnecessary software bloat
• Daily builds to ensure container images are up-to-date with available security patches
• High quality build-time SBOMs attesting to the provenance of all artifacts within the image
• Verifiable signatures provided by Sigstore
• Reproducible builds with Cosign and apko (read more about reproducibility)

For cases where you need container images with shells and package managers to build or debug, most Chainguard Containers come paired with a -dev variant.

Although the -dev container image variants have similar security features as their more minimal versions, they feature additional software that is typically not necessary in production environments. We recommend using multi-stage builds to leverage the -dev variants, copying application artifacts into a final minimal container that offers a reduced attack surface that won’t allow package installations or logins.

Learn More

To better understand how to work with Chainguard Containers, please visit Chainguard Academy and Chainguard Courses.

In addition to Containers, Chainguard offers VMs and Libraries. Contact Chainguard to access additional products.

Trademarks

This software listing is packaged by Chainguard. The trademarks set forth in this offering are owned by their respective companies, and use of them does not imply any affiliation, sponsorship, or endorsement by such companies.