参考https://docs.docker.com/engine/install/ubuntu/ 这个链接，在这做个记录

1、新增docker的apt源

# Add Docker's official GPG key:
sudo apt-get update
sudo apt-get install ca-certificates curl
sudo install -m 0755 -d /etc/apt/keyrings
sudo curl -fsSL https://download.docker.com/linux/ubuntu/gpg -o /etc/apt/keyrings/docker.asc
sudo chmod a+r /etc/apt/keyrings/docker.asc

# Add the repository to Apt sources:
echo \
  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/ubuntu \
  $(. /etc/os-release && echo "$VERSION_CODENAME") stable" | \
  sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
sudo apt-get update

2、安装docker

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

3、测试

docker run hello-world

4、push镜像问题

如果push镜像有问题就添加代理push，代理设置参考：Linux下配置代理
mkdir -p /etc/systemd/system/docker.service.d/
cat /etc/systemd/system/docker.service.d/http-proxy.conf
[Service]
Environment="HTTP_PROXY=http://127.0.0.1:10809"
Environment="HTTPS_PROXY=http://127.0.0.1:10809"
Environment="NO_PROXY=your-registry.com,10.10.10.10,*.example.com"
不需要走代理的添加到NO_PROXY里边用英文逗号分开，可以用*这个通配符
添加以后重启一下docker
systemctl daemon-reload
systemctl restart docker