Error response from daemon: Get https://registry-1.docker.io/v2/: net/http: request canceled

今天，安裝docker後使用命令：docker pull mongo 

   拉取mongoDB鏡像時遇到問題：Error response from daemon: Get https://registry-1.docker.io/v2/: net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)
 

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[root@docker-registry ~]# yum install bind-utils                          // 安裝dig工具
[root@docker-registry ~]# dig @114.114.114.114 registry-1.docker.io

; <<>> DiG 9.9.4-RedHat-9.9.4-61.el7_5.1 <<>> @114.114.114.114 registry-1.docker.io
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 51198
;; flags: qr rd ra; QUERY: 1, ANSWER: 8, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;registry-1.docker.io.          IN      A

;; ANSWER SECTION:
registry-1.docker.io.   31      IN      A       34.206.236.31
registry-1.docker.io.   31      IN      A       54.175.43.85
registry-1.docker.io.   31      IN      A       34.205.207.96
registry-1.docker.io.   31      IN      A       34.233.151.211
registry-1.docker.io.   31      IN      A       52.70.175.131
registry-1.docker.io.   31      IN      A       34.200.28.105
registry-1.docker.io.   31      IN      A       54.165.149.19
registry-1.docker.io.   31      IN      A       34.201.236.93

;; Query time: 10 msec
;; SERVER: 114.114.114.114#53(114.114.114.114)
;; WHEN: Wed Oct 31 11:18:55 CST 2018
;; MSG SIZE  rcvd: 177

選擇上面命令執行結果中的一組解析放到本機的/etc/hosts文件裏做映射
[root@docker-registry ~]# vim /etc/hosts
54.175.43.85    registry-1.docker.io

接着再進行docker pull鏡像下載操作
[root@docker-registry ~]# docker pull centos
Using default tag: latest
Trying to pull repository docker.io/library/centos ... 
latest: Pulling from docker.io/library/centos
aeb7866da422: Pull complete 
Digest: sha256:67dad89757a55bfdfabec8abd0e22f8c7c12a1856514726470228063ed86593b
Status: Downloaded newer image for docker.io/centos:latest
[root@docker-registry ~]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE docker.io/centos latest 75835a67d134 3 weeks ago 200 MB
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解決方案：

進入/etc/docker

查看有沒有 daemon.json。這是docker默認的配置文件。

如果沒有新建，如果有，則修改。

[root@zengmg docker]# vi daemon.json
{
  "registry-mirrors": ["https://registry.docker-cn.com","http://hub-mirror.c.163.com"]
}

保存退出。

重啓docker服務

service docker restart

問題解決

文章地址：https://blog.csdn.net/BigData_Mining/article/details/87869147