touch /etc/yum.repos.d/docker.repo
输入如下
[dockerrepo]
name=Docker Repository
baseurl=https://yum.dockerproject.org/repo/main/centos/7/
enabled=1
gpgcheck=1
gpgkey=https://yum.dockerproject.org/gpg

rpm -qa |grep docker
 yum -y remove xxx

yum install libdevmapper* -y
yum install docker-engine -y

systemctl start docker.service
chkconfig docker on

[root@dockerNode1 ~]# cat /etc/docker/daemon.json 
{"registry-mirrors": [[url=http://48b042ae.m.daocloud.io/]http://48b042ae.m.daocloud.io[/url]]}

docker pull registry

docker run -d -p 5000:5000 -v /opt/data/registry:/tmp/registry registry

docker pull busybox 

docker tag busybox 172.19.136.238:5000/gongtest:01 注库名不能有大写字母

docker push 172.19.136.238:5000/gongtest:01

docker rmi 172.19.136.238:5000/gongtest:01

[root@dockerNode1 ~]# curl 172.19.136.238:5000/v2/_catalog
{"repositories":["gongtest"]}
[root@dockerNode1 ~]# curl 172.19.136.238:5000/v2/gongtest/tags/list
{"name":"gongtest","tags":["01"]}

docker pull 172.19.136.238:5000/gongtest:01

[root@dockerNode1 ~]# docker images
REPOSITORY      TAG     IMAGE ID   CREATED     SIZE
172.19.136.238:5000/busybox latest    8a4698b1752b  Less than a second ago 1.11 MB
172.19.136.238:5000/gongtest 01     8a4698b1752b  Less than a second ago 1.11 MB