我无法在OKD中构建Pod，因为无法解决Github，并且构建失败。
错误：
Cloning "https://github.com/MeMyselfI/okd-hello-world " ...
error: fatal: unable to access 'https://github.com/MeMyselfI/okd-hello-world/': Could not resolve host: github.com; Unknown error
如何启动OKD：
sudo oc cluster up --routing-suffix=192.168.2.20.xip.io --public-hostname=192.168.2.20
OC客户端版本：
me@server:~$ sudo oc version
oc v3.11.0+0cbc58b
kubernetes v1.11.0+d4cacc0
features: Basic-Auth GSSAPI Kerberos SPNEGO
ping从SSH提示符：
me@server:~$ ping github.com
PING github.com (192.30.253.113) 56(84) bytes of data.
64 bytes from lb-192-30-253-113-iad.github.com (192.30.253.113): icmp_seq=1 ttl=52 time=33.4 ms
64 bytes from lb-192-30-253-113-iad.github.com (192.30.253.113): icmp_seq=2 ttl=52 time=34.0 ms
ping来自本地的手动启动的Docker容器：
me@server:~$ sudo docker exec -it hwnodemongo_web_1 /bin/bash
root@7c2db2faacf7:/usr/src/app# ping github.com
PING github.com (192.30.253.112) 56(84) bytes of data.
64 bytes from lb-192-30-253-112-iad.github.com (192.30.253.112): icmp_seq=1 ttl=52 time=28.3 ms
64 bytes from lb-192-30-253-112-iad.github.com (192.30.253.112): icmp_seq=2 ttl=52 time=27.4 ms
resolv.conf的输出
me@server:~$ cat /etc/resolv.conf
nameserver 8.8.8.8
dnsmasq正在运行：
dnsmasq 1479 0.0 0.0 51580 376 ? S 12:07 0:00 /usr/sbin/dnsmasq -x /run/dnsmasq/dnsmasq.pid -u dnsmasq -7 /etc/dnsmasq.d,.dpkg-dist,.dpkg-old,.dpkg-new --local-service --trust-anchor=.,19036,8,2,49aac11d7b6f6446702e54a1607371607a1a41855200fd2ce1cdde32f24e8fb5 --trust-anchor=.,20326,8,2,e06d44b80b8f1d39a95c0b0d7c65d08458e880409bbc683457104237c7f8ec8d
dig来自SSH：
me@server.com:~$ dig github.com
; <<>> DiG 9.11.3-1ubuntu1.5-Ubuntu <<>> github.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 20999
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;github.com. IN A
;; ANSWER SECTION:
github.com. 59 IN A 192.30.253.113
github.com. 59 IN A 192.30.253.112
;; Query time: 46 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Fri Apr 05 13:23:47 ADT 2019
;; MSG SIZE rcvd: 71
更新：
我在另一台机器上重新安装。我使用了oc cluster up（没有任何其他参数）并得到了相同的结果（通过访问localhost:8443/console）。