解决报错Error response from daemon: Get https://registry-1.docker.io/v2/: net/http: TLS handshaketimeout

解决报错Error response from daemon: Get https://registry-1.docker.io/v2/: net/http: TLS handshaketimeout

解决docker拉取镜像时的报错：

[root@zlhost docker-file]# docker pull java-8
Using default tag: latest
Error response from daemon: Get https://registry-1.docker.io/v2/library/java-8/manifests/latest: 
Get https://auth.docker.io/token?scope=repository%3Alibrary%2Fjava-8%3Apull&service=
registry.docker.io: net/http: request canceled while waiting for connection 
(Client.Timeout exceeded while awaiting headers)

该错误是连接不到网络，需要在本地配置hosts地址

1. 通过dig @114.114.114.114 registry-1.docker.io找到可用IP地址
   IP地址非固定可能会变动，所以需要多试几次（几个IP）

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;registry-1.