摘要： 配置insecure-registries，docker才能使用无权限验证的docker registry。
默认情况下，Docker不能使用没有配置权限验证的Docker Registry，会出现如下报错：
docker pull 192.168.59.100:5000/ubuntuError response from daemon: Get https://192.168.59.100:5000/v2/: http: server gave HTTP response to HTTPS client这时需要修改docker配置文件，将”192.168.59.100:5000”添加到insecure-registries中：
vim /etc/docker/daemon.json{"insecure-registries" : ["192.168.59.100:5000"]}然后重启docker
sudo systemctl restart docker // ubuntu 16.04sudo restart docker // ubuntu 14.04systemctl restart docker.service // CentOS 7
