Centos7中docker无法从非官方库中pull镜像的解决方法
系统版本# cat /etc/redhat-release
CentOS Linux release 7.1.1503 (Core)
docker版本
# docker --version
Docker version 1.7.1, build 446ad9b/1.7.1
错误信息
#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
#
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
# systemctl restart docker.service
#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
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