Centos 7 安裝 Docker (阿里雲)

卸載舊版本

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

使用官方腳本自動安裝

curl -fsSL https://get.docker.com | bash -s docker --mirror Aliyun

如出現以下報錯

Error: 
 Problem: package docker-ce-3:19.03.12-3.el7.x86_64 requires containerd.io >= 1.2.2-3, but none of the providers can be installed
  - cannot install the best candidate for the job
  - package containerd.io-1.2.10-3.2.el7.x86_64 is filtered out by modular filtering
  - package containerd.io-1.2.13-3.1.el7.x86_64 is filtered out by modular filtering
  - package containerd.io-1.2.13-3.2.el7.x86_64 is filtered out by modular filtering
  - package containerd.io-1.2.2-3.3.el7.x86_64 is filtered out by modular filtering
  - package containerd.io-1.2.2-3.el7.x86_64 is filtered out by modular filtering
  - package containerd.io-1.2.4-3.1.el7.x86_64 is filtered out by modular filtering
  - package containerd.io-1.2.5-3.1.el7.x86_64 is filtered out by modular filtering
  - package containerd.io-1.2.6-3.3.el7.x86_64 is filtered out by modular filtering

需要安裝最新版 containerrd.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

安裝完成後，再次執行腳本安裝

啓動docker

sudo systemctl start docker

通過運行 hello-world 映像來驗證是否正確安裝了 Docker Engine-Community 。

sudo docker run hello-world

修改爲國內鏡像源

vim /etc/docker/daemon.json

修改配置文件，沒有則添加

{
    "registry-mirrors": [
        "http://hub-mirror.c.163.com",
        "https://registry.docker-cn.com",
        "https://docker.mirrors.ustc.edu.cn"
    ]
}

重啓Docker

systemctl daemon-reload

systemctl restart docker

參考 https://www.runoob.com/docker/centos-docker-install.html