Docker Installation on CentOS 7

1. If you have previously installed Docker, it’s recommended to uninstall old dependencies first:

sudo yum remove docker \
                docker-client \
                docker-client-latest \
                docker-common \
                docker-latest \
                docker-latest-logrotate \
                docker-logrotate \
                docker-engine

2. Installation

# Step 1: Install necessary system tools
sudo yum install -y yum-utils device-mapper-persistent-data lvm2

# Step 2: Add software repository information
sudo yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

# Step 3: Update and install Docker-CE
sudo yum makecache fast
sudo yum -y install docker-ce docker-ce-cli containerd.io

# Step 4: Start Docker service and enable it to start on system boot
sudo systemctl start docker
sudo systemctl enable docker

# Step 5: Verify Docker installation and check its version
docker --version

3. After installation, the latest version comes with the docker compose command, so there’s no need to install docker-compose separately
4. Enable Alibaba Cloud mirror acceleration (optional)

• Go to Alibaba Cloud Console Homepage
• Access Management Console -> Login -> Top-left Console -> Products & Services -> Container -> Container Registry -> Click Mirrors in sidebar -> Mirror Acceleration -> Copy link

• Edit daemon configuration file vim /etc/docker/daemon.json and replace the accelerator address:

{
  "registry-mirrors": ["https://**********.mirror.aliyuncs.com"]
}

• Restart Docker

sudo systemctl daemon-reload
sudo systemctl restart docker