Error response from daemon: Get https://10.10.18.231:81/v2/: http: server gave HTTP response to HTTPS client

docker登陆harbor报错如下：

[root@oracledb files]# docker login  -u  admin -p Harbor12345 10.10.18.231:81

WARNING! Using --password via the CLI is insecure. Use --password-stdin.

Error response from daemon: Get https://10.10.18.231:81/v2/: http: server gave HTTP response to HTTPS client

解决方法：
运行命令：

echo '{ "insecure-registries":["$ip:$port"] }' > /etc/docker/daemon.json

systemctl restart docker

$ip:$port是要登陆的harbor的ip和端口，最后重启docker即可。