/docker-nexus3

Dockerized version of Nexus Repo Manager 3

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Sonatype Nexus3 Docker: sonatype/nexus3

A Dockerfile for Sonatype Nexus Repository Manager 3, based on CentOS.

To run, binding the exposed port 8081 to the host.

$ docker run -d -p 8081:8081 --name nexus sonatype/nexus3

To test:

$ curl -u admin:admin123 http://localhost:8081/service/metrics/ping

To (re)build the image:

Copy the Dockerfile and do the build-

$ docker build --rm=true --tag=sonatype/nexus3 .

Notes

  • Default credentials are: admin / admin123

  • It can take some time (2-3 minutes) for the service to launch in a new container. You can tail the log to determine once Nexus is ready:

$ docker logs -f nexus

  • Installation of Nexus is to /opt/sonatype/nexus.

  • A persistent directory, /nexus-data, is used for configuration, logs, and storage. This directory needs to be writable by the Nexus process, which runs as UID 200.

  • There is an environment variable that can used to pass JVM arguments to the startup script

    • INSTALL4J_ADD_VM_PARAMS, passed to the Install4J startup script. Defaults to -Xms1200m -Xmx1200m.

    This can be supplied at runtime:

    $ docker run -d -p 8081:8081 --name nexus -e INSTALL4J_ADD_VM_PARAMS="-Xms2g -Xmx2g" sonatype/nexus3

  • Another environment variable can be used to control the Nexus Context Path

    • NEXUS_CONTEXT, defaults to /

    This can be supplied at runtime:

    $ docker run -d -p 8081:8081 --name nexus -e NEXUS_CONTEXT=nexus sonatype/nexus3

Persistent Data

There are two general approaches to handling persistent storage requirements with Docker. See Managing Data in Containers for additional information.

  1. Use a data volume. Since data volumes are persistent until no containers use them, a volume can be created specifically for this purpose. This is the recommended approach.
$ docker volume create --name nexus-data
$ docker run -d -p 8081:8081 --name nexus -v nexus-data:/nexus-data sonatype/nexus3
  1. Mount a host directory as the volume. This is not portable, as it relies on the directory existing with correct permissions on the host. However it can be useful in certain situations where this volume needs to be assigned to certain specific underlying storage.
$ mkdir /some/dir/nexus-data && chown -R 200 /some/dir/nexus-data
$ docker run -d -p 8081:8081 --name nexus -v /some/dir/nexus-data:/nexus-data sonatype/nexus3

Build Args

The Dockerfile contains two build arguments (NEXUS_VERSION & NEXUS_DOWNLOAD_URL) that can be used to customize what version of, and from where, Nexus Repository Manager is downloaded. This is useful mostly for testing purposes as the Dockerfile may be dependent on a very specific version of Nexus Repository Manager.

docker build --rm --tag nexus-custom --build-arg NEXUS_VERSION=3.x.y --build-arg NEXUS_DOWNLOAD_URL=http://.../nexus-3.x.y-unix.tar.gz .

Getting Help

Looking to contribute to our Docker image but need some help? There's a few ways to get information or our attention: