解决docker: error pulling image configuration: Get https://registry-1.docker.io/v2/library/mysql/: TLS handshake timeout.

出现这个问题，一般的原因是无法连接到 docker hub，通过：

systemctl stop docker

echo "DOCKER_OPTS=\"\$DOCKER_OPTS --registry-mirror=http://f2d6cb40.m.daocloud.io\"" | sudo tee -a /etc/default/docker

 service docker restart