[root@master3 ~]#docker login 10.0.0.203:80
Username: admin
Password: 
Error response from daemon: Get "https://10.0.0.203:80/v2/": http: server gave HTTP response to HTTPS client

出现下面报错

Error response from daemon: Get "https://10.0.0.203:80/v2/": http: server gave HTTP response to HTTPS client

创建或修改/etc/docker/daemon.json

{
"insecure-registries":["10.0.0.203:80"]       #Harbor的IP和端口
}

重启即可