Resuelva la respuesta de error del demonio: Obtenga https://20.0.0.51/v2/: marque tcp 20.0.0.51:443: conecte: conexión rechazada
Error
Solución
[root@localhost ~]# vim /usr/lib/systemd/system/docker.service
ExecStart=/usr/bin/dockerd -H fd:// --insecure-registry 20.0.0.51 --containerd=/run/containerd/containerd.sock
[root@localhost ~]# systemctl daemon-reload
[root@localhost ~]# systemctl restart docker.service
[root@localhost ~]# docker login -u admin -p Harbor12345 http://20.0.0.51
WARNING! Using --password via the CLI is insecure. Use --password-stdin.
WARNING! Your password will be stored unencrypted in /root/.docker/config.json.
Configure a credential helper to remove this warning. See
https://docs.docker.com/engine/reference/commandline/login/#credentials-store
Login Succeeded