Docker pull download mirror error resolution

Get https://registry-1.docker.io/v2/library/apline/manifests/latest: net/http: TLS handshake timeout

1、安装dig工具：【yum install bind-utils】

2、查找可用映射：【dig @114.114.114.114 registry-1.docker.io】
;; ANSWER SECTION:
registry-1.docker.io.	48	IN	A	52.87.94.70
registry-1.docker.io.	48	IN	A	54.165.149.19

3、添加映射：【vim /etc/hosts】
54.165.149.19 registry-1.docker.io