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Chainguard Libraries for Java

Global Configuration

Configuring Chainguard Libraries for Java in your organization
Chainguard Libraries Java

Java and JVM library consumption in a large organization is typically managed by a repository manager. Commonly used repository manager applications are Cloudsmith, Google Artifact Registry, JFrog Artifactory, and Sonatype Nexus Repository. The repository manager acts as a single point of access for developers and development tools to retrieve the required libraries.

At a high level, adopting the use of Chainguard Libraries consists of the following steps:

  • Add Chainguard Libraries as a remote repository for library retrieval.
  • Configure the Chainguard Libraries repository as the first choice for any library access. This ensures that any future requests of new libraries access the version supplied by Chainguard. Typically this is accomplished by creating a group repository or virtual repository that combines the repository with other external and internal repositories.

Additional steps depend on the desired insights and can include the following optional measures:

  • Remove all cached artifacts in the proxy repository of Maven Central and other repositories. This step allows you to validate which libraries are not available from Chainguard Libraries and proceed with potential next steps with Chainguard and your own development efforts.
  • Remove any repositories that are no longer desired or necessary. Depending on your library requirements this step can result in removal of some proxy repositories or even removal of all proxy repositories.

Adopting the use of a repository manager is the recommended approach, however if your organization does not use a repository manager, you can still use Chainguard Libraries. All access to the Chainguard libraries repository is then distributed across all your build platforms and therefore more complex to configure and control.

Cloudsmith

Cloudsmith supports Maven repositories for proxying and hosting. Refer to the Maven Repository documentation and the Maven Upstream documentation for Cloudsmith for more information. Cloudsmith supports combining repositories by defining multiple upstream repositories.

Initial configuration

Use the following steps to add a repository with the Maven Central Repository and the Chainguard Libraries for Java repository as Maven upstream repositories.

Configure a chainguard-maven repository:

  1. Log in as a user with administrator privileges.
  2. Select the Repositories tab near the top of the screen.
  3. On the Repositories page, click the + New repository button.
  4. Enter the name chainguard-maven for your new repository. The name should include maven to identify the repository format. This convention helps avoid confusion since repositories in Cloudsmith are multi-format.
  5. Select a storage region that is appropriate for your organization and infrastructure.
  6. Press + Create Repository.

Configure an upstream proxy for the Maven Central Repository:

  1. Click the name of the new chainguard-maven repository on the repositories page to configure it.
  2. Access the Upstreams tab and click + Add Upstream Proxy.
  3. Configure an upstream proxy with the format Maven and the following details:
  4. Configure another upstream proxy with the following details
    • Name central
    • Priority 2
    • Upstream URL https://repo1.maven.org/maven2/
    • Mode Cache and Proxy
  5. Press Create Upstream Proxy.

Configure an upstream proxy for the Chainguard Libraries for Java repository:

  1. Click the name of the new chainguard-maven repository on the repositories page to configure it.
  2. Access the Upstreams tab and click + Add Upstream Proxy.
  3. Configure an upstream proxy with the format Maven and the following details:
    • Name chainguard
    • Priority 1
    • Proxy URL https://libraries.cgr.dev/java/
    • Mode Cache and Proxy
    • Add the Username and Password value from Chainguard Libraries access in Authentication Settings
  4. Press Create Upstream Proxy.

Use this setup for initial testing with Chainguard Libraries for Java. For production usage, add the chainguard upstream proxy to your production repository.

Build tool access

The following steps allow you to determine the URL and authentication details for accessing the repository:

  1. Select the Packages tab.
  2. Press Push/Pull Packages.
  3. Choose the format Maven.
  4. Copy the value in the <url> tag from the XML snippet with the <repositories> entry. For example, https://dl.cloudsmith.io/basic/exampleorg/chainguard-maven/maven/ with exampleorg replaced with the name of your organization. Note that the name of the repository chainguard-maven as well as maven as identifier for the format are part of the URL.
  5. Copy the username and password values block from the second code snippet for authentication after choosing the desired authentication of Default or API Key.

Choose a different format and the equivalent sections if you are using another build tools such as Gradle.

Use the URL of the repository, the username, and the password for the server authentication block in the build configuration. and build a firs test project. In a working setup all libraries retrieved from Chainguard are tagged with the name of the upstream proxy.

Google Artifact Registry

Google Artifact Registry supports the Maven format for hosting artifacts in Standard repositories and proxying artifacts from public repositories in Remote repositories. Use Virtual repositories to combine them for consumption with Maven and other build tools. Use the Java package documentation for Google Artifact Registry as the starting point for more details.

Initial configuration

Use the following steps to add the Maven Central Repository and the Chainguard Libraries for Java repository as remote repositories and combine them as a virtual repository:

  1. Log in to the Google Cloud console as a user with administrator privileges.
  2. Navigate to your project and find the Artifact Registry with the search.
  3. Activate Artifact Registry if necessary.
  4. Navigate to your project and find the Secret Manager with the search.
  5. Activate Secret Manager if necessary.

Before configuring the repositories, you must create a secret with the password value as retrieved with chainctl:

  1. Navigate to the Secret Manager
  2. Press Create secret.
  3. Set the Name to chainguard-libraries-java.
  4. Use the Password from chainctl output to set the Secret value.
  5. Press Create secret.

Navigate to Artifact Registry and select Repositories in the left hand navigation under the Artifact Registry label to configure a remote repository for the Maven Central Repository:

  1. Press Create a Repository or the + button.
  2. Set the Name to central.
  3. Set the Format to Maven.
  4. Select Remote for the Mode.
  5. Select Maven Central for the Remote repository source.
  6. Choose a suitable Region for your development in Location type.
  7. Press Create.

Configure a remote repository for the Chainguard Libraries for Java repository:

  1. Press the + button to add another repository.
  2. Set the Name to chainguard.
  3. Set the Format to Maven.
  4. Select Remote for the Mode.
  5. Select Custom for the Remote repository source.
  6. Set the URL for the Custom repository to https://libraries.cgr.dev/java.
  7. Select Authenticated in Remote repository authentication mode.
  8. Set Username for the upstream repository to the value as retrieved with chainctl.
  9. Select the chainguard-libraries-java secret in the list for the Secret input.
  10. Choose the same suitable Region for your development in Location type as configured for the central repository.
  11. Press Create.

Combine the two repositories in a new virtual repository:

  1. Press the + button to add another repository.
  2. Set the Name to chainguard-maven.
  3. Set the Format to Maven.
  4. Select Virtual for the Mode.
  5. Press Add upstream repository in Virtual upstream repositories.
  6. Use the Browse button to locate and select the chainguard repository as Repository 1 and set the Policy name 1 to chainguard.
  7. Use the Browse button to locate and select the central repository as Repository 1 and set the Policy name 1 to central.
  8. Press Add upstream repository in Virtual upstream repositories.
  9. Set the Priority value for the chainguard policy name to a higher value than the central priority value.
  10. Choose the same suitable Region for your development in Location type as configured for the central repository.
  11. Press Create.

Build tool access

The following steps allow you to configure your build tool for accessing the repository:

  1. Navigate to Artifact Registry and select Repositories in the left hand navigation under the Artifact Registry label.
  2. Click on the chainguard-maven repository name in the list of repositories.
  3. Press the Setup instructions button and follow the documentation. Note that you must add the extension com.google.cloud.artifactregistry:artifactregistry-maven-wagon to each project.

In a working setup, the chainguard remote repository contains all artifacts retrieved from Chainguard.

JFrog Artifactory

JFrog Artifactory supports Maven repositories for proxying and hosting, and virtual repositories to combine them. Refer to the Maven Repository documentation for Artifactory for more information.

Initial configuration

Use the following steps to add the Maven Central Repository and the Chainguard Libraries for Java repository as remote repositories and combine them as a virtual repository:

  1. Log in as a user with administrator privileges.
  2. Press Administration in the top navigation bar.
  3. Select Repositories in the left hand navigation.

Configure a remote repository for the Maven Central Repository:

  1. Press Create a Repository and choose the Remote option.
  2. Select Maven as the Package type.
  3. Set the Repository Key to central.
  4. Set the URL to https://repo1.maven.org/maven2/ .
  5. Deactivate Maven Settings - Handle Snapshots.
  6. Press Create Remote Repository.

Configure a remote repository for the Chainguard Libraries for Java repository:

  1. Press Create a Repository and choose the Remote option.
  2. Select Maven as the Package type.
  3. Set the Repository Key to chainguard.
  4. Set the URL to https://libraries.cgr.dev/java/.
  5. Set User Name and Password / Access Token to the values as retrieved with chainctl.
  6. Check the Enable Token Authentication checkbox.
  7. Press Test to validate the connection.
  8. Deactivate Maven Settings - Handle Snapshots.
  9. Press Create Remote Repository.

Combine the two repositories in a new virtual repository:

  1. Press Create a Repository and choose the Virtual option.
  2. Set the Repository Key to chainguard-maven.
  3. Scroll down to the Repositories section
  4. Add the chainguard and maven-central repositories. Ensure the chainguard repository is the first in the displayed list. Use the icon on the right of the repository name to drag and drop repositories into the desired position.
  5. Press Create Virtual Repository.

Use this setup for initial testing with Chainguard Libraries for Java. For production usage add the chainguard repository to your production virtual repository.

Build tool access

The following steps allow you to determine the URL and authentication details for accessing the repository:

  1. Press Administration in the top navigation bar.
  2. Select Repositories in the left hand navigation.
  3. Select the Virtual tab in the repositories view.
  4. Locate the chainguard-maven* repository.
  5. Hover over the row and click the … in the last column on the right.
  6. Select Set Me Up in the dialog.
  7. Press Generate Token & Create Instructions
  8. Copy the generated token value to use as the password for authentication.
  9. Press Generate Settings.
  10. Copy the value from a url field. The are all identical. For example, https://exampleorg.jfrog.io/artifactory/chainguard-maven with exampleorg replaced with the name of your organization.

Use the URL of the virtual repository in the build configuration and build a first test project. In a working setup the chainguard remote repository contains all libraries retrieved from Chainguard.

Sonatype Nexus Repository

Sonatype Nexus Repository includes a maven-public repository group out of the box. It groups access to the Maven Central Repository from the maven-central repository with the internal maven-releases and maven-snapshot repositories. Refer to the Maven Repositories documentation for Nexus for more information.

If you are using this group, you can add a proxy repository for Chainguard Libraries for Java repository for production use.

Initial configuration

For initial testing and adoption it is advised to create a separate proxy repository for the Maven Central Repository, a separate proxy repository Chainguard Libraries for Java repository, and a separate repository group:

  1. Log in as a user with administrator privileges.
  2. Access the Server administration and configuration section with the gear icon in the top navigation bar.

Configure a remote repository for the Maven Central Repository:

  1. Select Repository - Repositories in the left hand navigation.
  2. Press Create repository.
  3. Select the maven2 (proxy) recipe.
  4. Provide a new name central.
  5. Ensure Maven 2 - Version policy is set to Release.
  6. In the Proxy - Remote storage input add the URL https://repo1.maven.org/maven2/.
  7. Press Create repository.

Configure a remote repository for the Chainguard Libraries for Java repository:

  1. Select Repository - Repositories in the left hand navigation.
  2. Press Create repository.
  3. Select the maven2 (proxy) recipe.
  4. Provide a new name chainguard.
  5. Ensure Maven 2 - Version policy is set to Release.
  6. In the Proxy - Remote storage input add the URL https://libraries.cgr.dev/java/.
  7. In HTTP - Authentication with the Authentication type username, provide the username and password values as retrieved with chainctl.
  8. Press Create repository.

Combine a new repository group and add the two repositories:

  1. Select Repository - Repositories in the left hand navigation.
  2. Press Create repository.
  3. Select the maven2 (group) recipe.
  4. Provide a new name chainguard-maven.
  5. In the section Group - Member repositories, move the new repositories central and chainguard to the right and move the chainguard repository to the top of the list with the arrow control.

Build tool access

The following steps allow you to determine the URL and authentication details for accessing the repository:

  1. Click Browse in the Welcome view or the browse icon (cube) in the top navigation bar.
  2. Locate the URL column for the chainguard-maven repository group and press copy. For example, https://repo.example.com/repository/chainguard-maven/ with repo.example.com replaced with the hostname of you repository manager.
  3. Copy the URL in the dialog.
  4. Use your configured username and password unless Security - Anonymous Access - Access - Allow anonymous users to access the server is activated. Details vary based on your configured authentication system.

Use the URL of the repository group, such as https://repo.example.com/repository/chainguard-maven/ or https://repo.example.com/repository/maven-public/ in the build configuration and build a first test project. In a working setup the chainguard proxy repository contains all libraries retrieved frohttps://github.com/chainguard-dev/edu/pull/2148avoidm Chainguard.

Last updated: 2025-04-07 14:42

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