解决报错ERROR: Service 'web' failed to build: Get https://registry-1.docker.io/v2/library/python/manifests/2.7: net/http: TLS handshake timeout

一、问题描述

当我用docker-compose up时，因为需要build Dockerfile文件，出现下面这个错误：

ERROR: Service 'web' failed to build: Get https://registry-1.docker.io/v2/library/python/manifests/2.7: net/http: TLS handshake timeout

二、问题解决

1、查看可用的ip地址

[root@docker-node1 compose-flask]# dig @114.114.114.114 registry-1.docker.io

; <<>> DiG 9.9.4-RedHat-9.9.4-37.el7 <<>> @114.114.114.114 registry-1.docker.io
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 38727
;; flags: qr rd ra; QUERY: 1, ANSWER: 8, AUTHORITY: 0, ADDITIONAL: 1

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

;; ANSWER SECTION:
registry-1.docker.io.    32    IN    A    34.199.40.84
registry-1.docker.io.    32    IN    A    34.201.196.144
registry-1.docker.io.    32    IN    A    34.228.211.243
registry-1.docker.io.    32    IN    A    34.232.31.24
registry-1.docker.io.    32    IN    A    52.55.198.220
registry-1.docker.io.    32    IN    A    52.202.253.107
registry-1.docker.io.    32    IN    A    52.201.142.14
registry-1.docker.io.    32    IN    A    34.199.77.19

;; Query time: 49 msec
;; SERVER: 114.114.114.114#53(114.114.114.114)
;; WHEN: 二 2月 04 14:15:50 CST 2020
;; MSG SIZE  rcvd: 177

通过dig @114.114.114.114 registry-1.docker.io命令查看所有的可用地址。

2、修改/etc/hosts文件

可以将上述可用的ip以下面这种方式写入：

127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6

#写入可用的ip
34.199.40.84 registry-1.docker.io
34.201.196.144 registry-1.docker.io

然后进行文件保存，重新执行docker-compose up命令，问题解决。