修复阿里云docker中certificate signed by unknown authority亲测有效

解决Error response from daemon: Get https://registry-1.docker.io/v2/: x509: certificate signed by unknown authority

阿里云服务器安装的docker一直报错，后来查阅老外的记录解决了问题。过程如下。

安装 ca-certificates

yum update ca-certificates || sudo yum -y reinstall ca-certificates

创建目录 /etc/docker/certs.d

mkdir -p /etc/docker/certs.d/registry-1.docker.io:443 

复制 SSL 证书

mv www.spinach.ink.pem /etc/docker/certs.d/registry-1.docker.io:443/server.crt

mv www.spinach.ink.key /etc/docker/certs.d/registry-1.docker.io:443/server.key

重启 Docker

systemctl restart docker

此时重启docker，基本上就修复了。