Centos7中docker无法从非官方库中pull镜像的解决方法

cheun

　　系统版本

　　[root@bogon ~]# cat /etc/redhat-release
　　CentOS Linux release 7.1.1503 (Core)
　　

　　docker版本
　　[root@bogon ~]# docker --version
　　Docker version 1.7.1, build 446ad9b/1.7.1
　　

　　错误信息
　　[root@bogon ~]#  docker pull dl.dockerpool.com:5000/ubuntu:12.04
　　Error response from daemon: invalid registry endpoint https://dl.dockerpool.com:5000/v0/: unable to ping registry endpoint https://dl.dockerpool.com:5000/v0/
　　v2 ping attempt failed with error: Get https://dl.dockerpool.com:5000/v2/: tls: oversized record received with length 28012
　　v1 ping attempt failed with error: Get https://dl.dockerpool.com:5000/v1/_ping: tls: oversized record received with length 28012. If this private registry supports only HTTP or HTTPS with an unknown CA certificate, please add `--insecure-registry dl.dockerpool.com:5000` to the daemon's arguments. In the case of HTTPS, if you have access to the registry's CA certificate, no need for the flag; simply place the CA certificate at /etc/docker/certs.d/dl.dockerpool.com:5000/ca.crt
　　[root@bogon ~]#
　　

　　解决办法：
　　修改/etc/sysconfig/docker文件，增加如下信息
　　OPTIONS='--selinux-enabled --insecure-registry dl.dockerpool.com:5000'
　　

　　重启docker服务并重新下载
　　[root@bogon ~]# systemctl restart docker.service
　　[root@bogon ~]#  docker pull dl.dockerpool.com:5000/ubuntu:12.04
　　Trying to pull repository dl.dockerpool.com:5000/ubuntu ...
　　0b310e6bf058: Download complete
　　511136ea3c5a: Download complete
　　5f18d94c3eca: Download complete
　　53db23c604fd: Download complete
　　9f045ea36057: Download complete
　　d03a1a9d7555: Download complete
　　30868777f275: Download complete
　　Status: Downloaded newer image for dl.dockerpool.com:5000/ubuntu:12.04