解决docker pull ubuntu报错

问题：docker pull ubuntu报错

[root@Centos1 ~]# docker pull ubuntu
latest: Pulling from ubuntu
0849d1d6d069: Pull complete 
0849d1d6d069: Pulling fs layer 
efe9b9ee6f80: Download complete 
eb51cd05edf7: Download complete 
a177d12adaa2: Download complete 
Pulling repository ubuntulayer 
Get https://index.docker.io/v1/repositories/library/ubuntu/images: EOF

解决方案：

1.执行命令：yum install bind-utils  工具

2.执行命令：dig @114.114.114.114 registry-1.docker.io

[root@Centos1 ~]# dig @114.114.114.114 registry-1.docker.io

; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.68.rc1.el6_10.3 <<>> @114.114.114.114 registry-1.docker.io
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 15638
;; flags: qr rd ra; QUERY: 1, ANSWER: 8, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;registry-1.docker.io.        IN    A

;; ANSWER SECTION:
registry-1.docker.io.    33    IN    A    3.226.66.79
registry-1.docker.io.    33    IN    A    3.221.133.86
registry-1.docker.io.    33    IN    A    34.197.189.129
registry-1.docker.io.    33    IN    A    34.199.77.19
registry-1.docker.io.    33    IN    A    34.199.40.84
registry-1.docker.io.    33    IN    A    3.224.75.242
registry-1.docker.io.    33    IN    A    3.224.11.4
registry-1.docker.io.    33    IN    A    34.201.196.144

;; Query time: 56 msec
;; SERVER: 114.114.114.114#53(114.114.114.114)
;; WHEN: Sat Nov 23 16:53:24 2019
;; MSG SIZE  rcvd: 166

3.vi /etc/hosts

将3.221.133.86   registry-1.docker.io追加在配置文件中

[root@Centos1 ~]# vi /etc/hosts

127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.2.128  Centos1
192.168.2.129  Centos2
192.168.2.130  Centos3
3.221.133.86   registry-1.docker.io

4.docker pull ubuntu

[root@Centos1 ~]# docker pull ubuntu
latest: Pulling from ubuntu
e860e2382707: Pull complete 
efe9b9ee6f80: Pull complete 
eb51cd05edf7: Pull complete 
a177d12adaa2: Pull complete 
a177d12adaa2: Pulling fs layer 
Digest: sha256:44ed9bfa3f850417f4036afc34ce97559c464c708a9b42f8be14392921e8bc42
Status: Downloaded newer image for ubuntu:latest

5.docker images 验证是否成功

[root@Centos1 ~]# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             VIRTUAL SIZE
<none>              <none>              b698458a3d6b        51 minutes ago      273.5 MB
debian              latest              97b9b3e4e792        18 hours ago        114 MB
ubuntu              latest              a177d12adaa2        3 weeks ago         64.19 MB
<none>              <none>              ac5bce8377e2        5 weeks ago         55.65 MB
centos              latest              d97a52facc3f        7 weeks ago         219.5 MB
registry            latest              f99738109191        8 months ago        25.76 MB
[root@Centos1 ~]#