Installing Docker and Docker Compose on an Ubuntu server:

Installing Docker and Docker Compose on an Ubuntu server:

Installing Docker on Ubuntu:

1. Update Package Index:

   sudo apt update

2. Install Dependencies: Install the packages necessary to allow apt to use a repository over HTTPS:

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

3. Add Docker's Official GPG Key: Add Docker’s official GPG key to your system:

   curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -

4. Set Up the Stable Repository: Add the Docker repository to APT sources:

   sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"

5. Update the Package Database: Update the package database with Docker packages from the newly added repo:

   sudo apt update

6. Install Docker CE: Install Docker Community Edition (CE):

   sudo apt install docker-ce

7. Verify Docker Installation: Check that Docker is installed correctly by running the hello-world image:

   sudo docker run hello-world

Installing Docker Compose:

1. Download Docker Compose Binary:

   • Check the latest release of Docker Compose from the official GitHub repository.

   • Replace VERSION with the latest release version:

   sudo curl -L "https://github.com/docker/compose/releases/download/VERSION/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose

2. Apply Executable Permissions:

   sudo chmod +x /usr/local/bin/docker-compose

3. Create Symbolic Link:

   sudo ln -s /usr/local/bin/docker-compose /usr/bin/docker-compose

4. Verify Docker Compose Installation:

   docker-compose --version

Post-Installation Steps:

1. Manage Docker as a Non-root User (Optional):

   • If you want to run Docker commands without sudo, add your user to the docker group:

   sudo usermod -aG docker $USER

   • Log out and log back in to apply the group membership changes.

2. Restart Docker Service:

   sudo systemctl restart docker

3. Test Docker Compose:

   • Create a docker-compose.yml file in your project directory.

   • Define services and configurations in the docker-compose.yml.

   • Run docker-compose up to start the services defined in the YAML file.

Automation Script:

#!/bin/bash

# Install Docker
sudo apt update
sudo apt install -y apt-transport-https ca-certificates curl software-properties-common
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
sudo apt update
sudo apt install -y docker.io

# Install Docker Compose
sudo curl -L "https://github.com/docker/compose/releases/download/1.29.2/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
sudo chmod +x /usr/local/bin/docker-compose

# Add current user to the docker group
sudo usermod -aG docker $USER

# Prompt user to log out and log back in to apply group membership changes
echo "Please log out and log back in to apply group membership changes."

Save the script to a file, for example, install_docker.sh, then make it executable:

chmod +x install_docker.sh

To execute the script, run:

./install_docker.sh

Conclusion:

You have now successfully installed Docker and Docker Compose on your Ubuntu server. This setup enables you to manage and deploy containerized applications efficiently.