安装dig
yum install bind-utils
docker search mysql 时候报错：
[root@dockermaster ~]# docker search mysql
Error response from daemon: Get https://index.docker.io/v1/search?q=mysql&n=25: dial tcp 54.88.253.98:443: i/o timeout
或者：
[root@archlinux quanxj]# docker image pull library/hello-world
Using default tag: latest
latest: Pulling from library/hello-world
ca4f61b1923c: Pull complete
error pulling image configuration: Get
https://registry-1.docker.io/v2/library/hello-world/blobs/sha256:f2a91732366c0332ccd7afd2a5c4ff2b9af81f549370f7a19acd460f87686bc7
: dial tcp 35.169.231.249:443: i/o timeout
解决方法如下：
第一步：
182.18.32.18 为本机的DNS
通过
dig @182.18.32.18 registry-1.docker.io
找到可用IP
[root@dockermaster ~]# dig @182.18.32.18 registry-1.docker.io
; <<>> DiG 9.9.4-RedHat-9.9.4-61.el7 <<>> @182.18.32.18 registry-1.docker.io
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1522
;; flags: qr rd ra; QUERY: 1, ANSWER: 8, AUTHORITY: 6, ADDITIONAL: 12;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;registry-1.docker.io.
IN
A;; ANSWER SECTION:
registry-1.docker.io.
60
IN
A
52.22.181.254
registry-1.docker.io.
60
IN
A
54.152.209.167
registry-1.docker.io.
60
IN
A
34.200.90.16
registry-1.docker.io.
60
IN
A
34.200.28.105
registry-1.docker.io.
60
IN
A
52.204.202.231
registry-1.docker.io.
60
IN
A
34.205.207.96
registry-1.docker.io.
60
IN
A
54.164.230.151
registry-1.docker.io.
60
IN
A
35.169.231.249;; AUTHORITY SECTION:
io.
118861
IN
NS
b0.nic.io.
io.
118861
IN
NS
a2.nic.io.
io.
118861
IN
NS
c0.nic.io.
io.
118861
IN
NS
a0.nic.io.
io.
118861
IN
NS
ns-a1.io.
io.
118861
IN
NS
ns-a3.io.;; ADDITIONAL SECTION:
ns-a3.io.
79825
IN
A
74.116.178.1
ns-a1.io.
82329
IN
A
194.0.1.1
ns-a1.io.
9891
IN
AAAA
2001:678:4::1
a0.nic.io.
12120
IN
A
65.22.160.17
a0.nic.io.
44508
IN
AAAA
2a01:8840:9e::17
a2.nic.io.
12120
IN
A
65.22.163.17
a2.nic.io.
20413
IN
AAAA
2a01:8840:a1::17
c0.nic.io.
12120
IN
A
65.22.162.17
c0.nic.io.
12120
IN
AAAA
2a01:8840:a0::17
b0.nic.io.
12120
IN
A
65.22.161.17
b0.nic.io.
44508
IN
AAAA
2a01:8840:9f::17;; Query time: 765 msec
;; SERVER: 182.18.32.18#53(182.18.32.18)
;; WHEN: 三 6月 20 09:56:04 CST 2018
;; MSG SIZE rcvd: 525
第二步：尝试修改
/etc/hosts
强制docker.io相关的域名解析到其它可用IP
vim /etc/hosts
添加一个可用IP：
52.22.181.254
registry-1.docker.io
保存之后重试:
[root@archlinux quanxj]# docker image pull library/hello-world
Using default tag: latest
latest: Pulling from library/hello-world
ca4f61b1923c: Already exists
Digest: sha256:083de497cff944f969d8499ab94f07134c50bcf5e6b9559b27182d3fa80ce3f7
Status: Downloaded newer image for hello-world:latest
验证：
[root@archlinux quanxj]# docker image ls
REPOSITORY TAG IMAGE ID CREATED SIZE
hello-world latest f2a91732366c 3 months ago 1.85k