1. Environment Overview and Tools

Introduction

This page provides an overview of the tools and software used in setting up and running the DC4EU interoperability lab. The instructions are geared toward Ubuntu/Debian systems and focus on the technologies required to manage containers, coordinate multi-container applications, and handle version control.

With these tools in place, you will be ready to proceed with cloning the repository and setting up the environment as described in subsequent pages.

Prerequisites

Before starting, ensure that the following software and tools are installed on your system. All instructions are for Ubuntu/Debian:

• Docker: Version 20.10 or later
• Docker Compose: (Integrated as docker compose) Requires Docker CLI version 20.10 or later
• Git: Version 2.25 or later

Docker

Docker is a platform that enables developers to build, run, and manage applications within containers. A container is a lightweight, standalone package that includes everything an application needs to run: code, runtime, system tools, libraries, and settings. Containers are especially useful in creating consistent test environments because they can be easily shared, replicated, and deployed across various systems, making it straightforward to ensure that your application runs the same everywhere.

While Docker containers share the host operating system's kernel, they run a complete, lightweight operating system inside the container. This OS is specifically designed to run the application and its dependencies efficiently. This means that each container has its own file system, processes, and network interfaces, providing a high level of isolation and security.

Containers are created from Docker images, which act as templates or blueprints. A Docker image includes all components necessary to run an application the application code, libraries, dependencies, and default configurations. Each time you run a Docker image, it creates a new container based on that template, ensuring consistency across different environments.

For the interoperability lab, all Docker images are created and hosted by SUNET.

Key Docker commands:

• docker pull <image>: Downloads a Docker image from a remote repository.
• docker run <image>: Runs a container from a specified image.
• docker ps: Lists all running containers.
• docker stop <container>: Stops a running container.

Docker Compose

Docker Compose is a tool used to define and manage multi-container Docker applications. Using a docker-compose.yaml file, you can specify the necessary containers for your application by either building images locally or using pre-built images. For the interoperability lab, all images are hosted by SUNET, and the URLs for these images are listed in the docker-compose.yaml file.

This setup simplifies launching a complete environment, as Docker Compose manages configuration details like environment variables, ports, and volume mappings across multiple containers. With a single command, you can bring up the entire environment specified in the Compose file, making it easy to set up and replicate consistent environments.

Key Docker Compose commands:

• docker-compose up: Starts the services defined in your docker-compose.yaml.
• docker-compose down: Stops and removes the containers defined in the Compose file.
• docker-compose ps: Lists all running services defined in the Compose file.

Git and GitHub

Git is a version control system that allows multiple people to work on a project without overwriting each other's work. It tracks changes and enables collaboration by managing branches and repositories. GitHub is a web-based platform that hosts Git repositories, making it easier to share, review, and collaborate on code.

Key Git commands:

• git clone <repository_url>: Copies a remote repository (like GitHub) to your local machine.
• git status: Shows the status of your current repository (modified files, staged changes, etc.).
• git add <file>: Adds a file to the staging area, preparing it to be committed.
• git commit -m "message": Saves your staged changes to the repository with a message describing the update.

Cloning the Project

To get started with the interoperability lab, clone the vc_up_and_running project from GitHub

1. Open your terminal.
2. Use git clone https://github.com/dc4eu/vc_up_and_running.git to download the repository to your local environment.
3. Change into the project directory with cd vc_up_and_running.

Next: 2. Credential Constructor and Datastore Setup Guide