Docker and Docker Compose Setup

Here’s a complete step-by-step guide to installing Docker and Docker Compose on Ubuntu 22.04

Step 1: Update the Package Index

Open your terminal and run the following command to update your package index:

sudo apt update

Step 2: Install Required Packages

Install the necessary packages that allow apt to use packages over HTTPS:

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

Step 3: Add Docker’s Official GPG Key

Download and add Docker’s GPG key using the recommended method:

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | gpg --dearmor | sudo tee /etc/apt/trusted.gpg.d/docker.gpg > /dev/null

Step 4: Add the Docker Repository

Add the Docker repository to your system:

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

Step 5: Update the Package Index Again

After adding the Docker repository, update the package index again:

sudo apt update

Step 6: Install Docker

Now, install Docker:

sudo apt install docker-ce

Step 7: Start and Enable Docker

Start the Docker service and enable it to run on startup:

sudo systemctl start docker
sudo systemctl enable docker

Step 8: Verify Docker Installation

Check if Docker is installed correctly by running:

sudo docker --version

You should see the installed version of Docker.

Step 9: Install Docker Compose

1. Download the Latest Version of Docker Compose:

   Find the latest version from the Docker Compose GitHub releases page. As of now, you can use the following command (replace v2.14.2 with the latest version if needed):

   sudo curl -L "https://github.com/docker/compose/releases/download/v2.14.2/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose

2. Apply Executable Permissions:

   Make the Docker Compose binary executable:

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

3. Verify Docker Compose Installation:

   Check if Docker Compose is installed correctly by running:

   docker-compose --version

You should see the installed version of Docker Compose.

Step 10: Manage Docker as a Non-root User (Optional)

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

1. Add Your User to the Docker Group:

   Replace username with your actual username if you're specifying it:

   sudo usermod -aG docker $USER

2. Log Out and Back In:

   Log out of your current session and back in to apply the group change. Alternatively, you can run:

   newgrp docker