Maven

A Nexus Maven repository has been setup at http://149.165.157.51:8100 that is used to deploy artifacts in anticipation of a CI/CD server. Configuring a Nexus server is straight-forward and involves the following steps:

1. Run the Nexus Docker container.
2. Login to Nexus and change the admin password.
3. Set up snapshot and release repositories.
4. Configure your projects to use the Nexus server.

Each step is discussed in more detail below.

Nexus Setup

We create a Docker Volume for storing persistent data. The volume will be mounted in the Nexus container and used by Nexus for local storage.

$> docker volume create --name nexus-data [1]
$> docker run -d -p 8081:8081 --name nexus -v nexus-data:/nexus-data sonatype/nexus3 [2]

1. The first command creates a Docker Volume named nexus-data.
2. The second command starts the Nexus container and mounts the volume (-v) nexus-data as the directory /nexus-data inside the container.

Then follow the instructions at https://hub.docker.com/r/sonatype/nexus3/ to login as the admin user and set up a snapshot repository and a release repository.

WARNING Change the admin user’s password!

To make use of the repositories you will need to add the following to one of:

1. The project’s pom.xml file.
2. The project’s parent pom.xml file, if it has one, or,
3. Your ~/.m2/settings.xml file

<repositoryies>
    <repository>
        <id>cdc-releases</id>
        <url>http://149.165.157.51:8100/repository/cdc-releases/</url>
        <releases><enabled>true</enabled></releases>
        <snapshots><enabled>false</enabled></snapshots>
    </repository>
    <repository>
        <id>cdc-snapshots</id>
        <url>http://149.165.157.51:8100/repository/cdc-snapshots/</url>
        <releases><enabled>false</enabled></releases>
        <snapshots><enabled>true</enabled></snapshots>
    </repository>
</repositoryies>

To deploy artifacts to the Nexus repository you will need to add the following to your ~/.m2/settings.xml file:

<servers>
    <server>
    	<id>cdc-releases</id>
    	<username>username</username>
    	<password>password</password>
    </server>
    <server>
    	<id>cdc-snapshots</id>
    	<username>username</username>
    	<password>password</password>
    </server>
</servers>

Use the repository names and username/password you configured on the Nexus server.

The project’s pom.xml or the parent’s pom.xml must also define the Nexus server in the </distributionManagement/> section.

<distributionManagement>
    <repository>
        <id>cdc-releases</id>
        <url>http://149.165.157.51:8100/repository/cdc-releases/</url>
    </repository>
    <snapshotRepository>
        <id>cdc-snapshots</id>
        <url>http://149.165.157.51:8100/repository/cdc-snapshots/</url>
    </snapshotRepository>
</distributionManagement>