docker pull ubuntu 失败，提示 dial tcp: lookup index.docker.io: no such host。路由器有启用 VPN，但还是失败，请问万能的 V 友哪里出问题了？

[guojing]

这几天想研究一下 docker 。然而 docker pull 镜像老是失败。失败提示如下：
docker pull ubuntu
Using default tag: latest
Pulling repository docker.io/library/ubuntu
Error while pulling image: Get https://index.docker.io/v1/repositories/library/ubuntu/images: dial tcp: lookup index.docker.io: no such host

docker pull quay.io/sameersbn/gitlab:8.0.4-1
Pulling repository quay.io/sameersbn/gitlab
288e1017a602: Error pulling image (8.0.4-1) from quay.io/sameersbn/gitlab, Server error: Status 0 while fetching image layer (48731f0a6276cfb5d94a8f18690d56f88aError pulling image (8.0.4-1) from quay.io/sameersbn/gitlab, Server error: Status 0 while fetching image layer (48731f0a6276cfb5d94a8f18690d56f88a586e701f1dd7f56889f26be990277d)

自用的网络有在路由器部署 VPN,国外路由自动走 VPN 。测试的系统是 MacBook Pro OS X 10.10.5 。请问万能的 V 友哪里出问题了？

[SparkMan]

帮你搜了一把 Google http://linuxconfig.org/docker-dial-tcp-lookup-index-docker-io-no-such-host-fix

[SparkMan]

或者 http://blog.csdn.net/halcyonbaby/article/details/39475765