First, install dependencies
sudo yum install -y yum-utils device-mapper-persistent-data lvm2
Second, set up a mirror
sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
Third, try to one-time installation
sudo yum install docker-ce docker-ce-cli containerd.io
Fourth, if the following error, then take the fifth step, first install the new version of containerd.io
Problem: package docker-ce-3:19.03.4-3.el7.x86_64 requires containerd.io >= 1.2.2-3
Fifth, install the latest version containerd.io
dnf install https://download.docker.com/linux/centos/7/x86_64/stable/Packages/containerd.io-1.2.6-3.3.el7.x86_64.rpm
This step may frequently go wrong, try more than once
Six, the installation again, the middle of interactive, pay attention. About 3 minutes after the installation.
sudo yum install docker-ce docker-ce-cli
Seven, start docker
sudo systemctl start docker
Eight,
docker --version
Nine, boot from Kai
sudo systemctl enable docker
