System Preparation and Cleanup

Before initiating the installation of Docker Engine, it is crucial to remove any conflicting legacy packages that may exist on the system. This ensures a clean environment for the containerization tools.

sudo apt-get remove docker docker-engine docker.io containerd runc
sudo apt-get update

Installing Dependencies

Install the necessary prerequisite packages that allow apt to utilize repositories over HTTPS.

sudo apt-get install -y ca-certificates curl gnupg lsb-release

Configuring the Docker Repository

To facilitate faster downloads and ensure connectivity, use the Aliyun mirror for the Docker repository. First, add the official GPG key.

sudo mkdir -p /etc/apt/keyrings
curl -fsSL https://mirrors.aliyun.com/docker-ce/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg

Next, set up the repository using the added key.

echo \
  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://mirrors.aliyun.com/docker-ce/linux/ubuntu \
  $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

sudo apt-get update

Installing Docker Engine

Install the latest version of Docker Engine, the command-line interface, and the containerd runtime.

sudo apt-get install -y docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin

Managing Docker as a Non-Root User

The Docker daemon binds to a Unix socket instead of a TCP port. By default, this socket is owned by the user root. To avoid using sudo for every command, add the current user to the docker group.

sudo groupadd docker
sudo usermod -aG docker $USER
newgrp docker

Configuring Image Acceleration

To optimize image pull speeds, configure the Docker daemon to use a registry mirror. Create or modify the daemon. configuration file.

sudo mkdir -p /etc/docker

sudo tee /etc/docker/daemon. <<-'EOF'
{
  "registry-mirrors": [
    "https://docker.m.daocloud.io"
  ]
}
EOF

sudo systemctl daemon-reload
sudo systemctl restart docker