Deploy Nexus Container with Docker Compose

Introduction

Sonatype Nexus 3 is an open source repository manager used to store and manage software artifacts. It provides a central location to store and manage software components and their dependencies, making it easier to manage and distribute software packages within an organization.

Prerequisites

• Minimum 2 core CPU and 4 GB memory required.
• Basic knowledge of Docker.
• Basic knowledge of Linux commands.
• Up and running Docker.

To install Docker and docker compose on ubuntu 22.04 LTS, We can use the given link.

In this post, We will deploy Sonatype Nexus Repository container using Docker Compose on Ubuntu 22.04 LTS machine.

Step 1: Creating docker-compose.yml

To deploy Nexus 3 using Docker Compose, you can create a docker-compose.yml file with the necessary configurations. Nexus 3 is a repository manager used for managing binary artifacts, and using Docker Compose makes it easier to define and manage the required services.

To create a docker-compose.yml

sudo nano docker-compose.yml

Copy and paste the followings configuration.

version: '3'
services:
  nexus:
    image: sonatype/nexus3
    container_name: nexus
    ports:
      - "8081:8081"
    volumes:
      - ./nexus-data:/nexus-data
    environment:
      - INSTALL4J_ADD_VM_PARAMS=-Xms2g -Xmx2g

networks:
  default:
    external:
      name: some-existing-network

In this example:

• sonatype/nexus3 is the official Nexus 3 Docker image.
• We expose port 8081, which is the default port Nexus 3 uses.
• A volume is mounted to persist Nexus data.

Save and exit from the text editor.

Step 2: Deploy MongoDB Container

To deploy this nexus service, follow these steps, Run the following command to start the nexus container:

sudo docker-compose up -d

The -d flag runs the containers in the background, It will take few sec or mins to pull the image and deploy the nexus.

Step 3: Validate the Container

To check the running containers launched by Docker Compose, you can use the following command:

sudo docker-compose ps

This command provides a summary of the status of each service defined in your docker-compose.yml file. It shows information such as the service name, container ID, status, ports, and names.

Here’s an example of what the output might look like:

   Name                 Command            State               Ports
-------------------------------------------------------------------------
nexus   docker-entrypoint.sh nexus   Up      0.0.0.0:8081->8081/tcp

Step 4: Logging

Some time we need to also check the real time logs, So we can use the given commands.

sudo docker-compose logs -f nexus

Step 5: Destroy Nexus Container

To destroy (stop and remove) the MangoDB container launched with Docker Compose, you can use the following command in the directory where your docker-compose.yml file is located:

sudo docker-compose down

This command stops and removes all the containers, networks, and volumes defined in your docker-compose.yml file.

The down command stops and removes the containers but retains the data volumes by default. If you want to remove the volumes as well, you can use the -v option:

sudo docker-compose down -v

Make sure you are in the correct directory containing your docker-compose.yml file when running these commands. This ensures that Docker Compose identifies the correct configuration file.

After running the docker-compose down command, you can use the docker-compose ps command to verify that the containers are no longer running. The output should be empty, indicating that no containers are currently running.

Remember that this command will stop and remove all the services defined in your docker-compose.yml file, not just the nexus service. If you only want to remove a specific service, you can specify the service name:

docker-compose down -v <service_name>

Replace <service_name> with the actual name of the service you want to remove.

Conclusion

We have successfully deployed Sonatype Nexus Repository container using Docker Compose on Ubuntu 22.04 LTS machine, If you still have questions, please post them in the comments section below.