CentOS下安装Docker后运行HelloWorld 提示Unable to find image ‘hello-world:latest‘ locally

        问题出现的场景是在CentOS下安装Docker完成后 运行命令

docker run hello-world

后提示Unable to find image 'hello-world:latest' locally
docker: Error response from daemon: Head "https://registry-1.docker.io/v2/library/hello-world/manifests/latest": Get "https://auth.docker.io/token?scope=repository%3Alibrary%2Fhello-world%3Apull&service=registry.docker.io": net/http: TLS handshake timeout.

解决方案：

切换国内阿里云镜像，创建daemon.json文件

vim /etc/docker/daemon.json

文件中添加内容如下：

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

保存并退出 重启docker服务

systemctl restart docker
systemctl status docker

再次运行docker

docker run hello-world

提示：

 hello world运行成功