Project Title:

Deploy Nexus as a Docker Container

Technologies Used:

• Docker: Containerization platform to run Nexus.
• Nexus Repository Manager: Artifact repository for DevOps.
• DigitalOcean: Cloud provider to host the droplet.
• Linux: Operating system for the droplet.

Project Description:

1. Create and Configure Droplet: Set up a DigitalOcean droplet with Linux to serve as the hosting environment for Nexus.
2. Set Up and Run Nexus: Use Docker to deploy Nexus on the droplet. Ensure Nexus is configured to manage artifacts securely and efficiently.

Step-by-Step Implementation:

1. Create and Configure Droplet

1. Log in to the DigitalOcean Console.
2. Create a new droplet:
   • Choose an image: Ubuntu 22.04 or another Linux distribution.
   • Select a plan: At least 2 GB RAM for Nexus to run smoothly.
   • Add SSH keys for secure access or use a password-based approach.
   • Launch the droplet and note down its public IP.
3. Access the droplet using SSH:

   ssh root@<your-droplet-ip>

1. Update the system:

   sudo apt update && sudo apt upgrade -y

2. Install Docker on the Droplet

1. Install prerequisites:

   sudo apt install -y apt-transport-https ca-certificates curl software-properties-common

1. Add Docker's GPG key and repository:

   curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg
   echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

1. Install Docker:

   sudo apt update && sudo apt install -y docker-ce docker-ce-cli containerd.io

1. Verify Docker installation:

   docker --version

3. Run Nexus as a Docker Container

1. Pull the Nexus Docker image:

   docker pull sonatype/nexus3

1. Create a directory for persistent data:

   mkdir -p /opt/nexus-data
   chmod -R 200 /opt/nexus-data

1. Run the Nexus container:

   docker run -d -p 8081:8081 --name nexus -v /opt/nexus-data:/nexus-data sonatype/nexus3

1. Confirm the container is running:

   docker ps

1. Access Nexus:

   • Open a browser and navigate to http://<your-droplet-ip>:8081.
   • Log in with the default credentials:
     • Username: admin
     • Password: Retrieved from /nexus-data/admin.password inside the container:

      docker exec nexus cat /nexus-data/admin.password
   

Post-Deployment Steps:

• Secure Nexus:
  • Update the admin password.
  • Configure HTTPS using a reverse proxy (e.g., Nginx).
• Enable Nexus Features:
  • Set up repositories for Maven, npm, or Docker images.

Click here for repo - https://gitlab.com/574n13y/devops4-deploy-nexus-as-docker-container

Happy Learning !!!