linux centos yum 报错 获取GPG密钥失败 Errno 14

安装命令

sudo yum install docker-ce-18.03.0.ce

错误信息

安装  1 软件包 (+10 依赖软件包)
升级           ( 10 依赖软件包)

总计：46 M
Is this ok [y/d/N]: y
Downloading packages:
warning: /var/cache/yum/x86_64/7/docker-ce-stable/packages/docker-ce-18.03.0.ce-1.el7.centos.x86_64.rpm: Header V4 RSA/SHA512 Signature,key ID 621e9f35: NOKEY
从 https://download.docker.com/linux/centos/gpg 检索密钥


获取 GPG 密钥失败：[Errno 14] curl#7 - "Failed to connect to 2600:9000:2003:ca00:3:db06:4200:93a1: Network is unreachable"

查看系统版本信息

[root@slave3 ~]# cat /etc/redhat-release
CentOS Linux release 7.4.1708 (Core)

从 mirrors.163.com 找到系统对应密钥

导入密钥

rpm --import http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7