今天收到一台 Redhat 系统的机器，需要安装 ansible 以便部署持续集成。
在配置完清华大学的 epel-release 源之后搜索 ansible 应用时出现以下错误：
[root@2B2C-test-DB1 yum.repos.d]# yum search ansible
Loaded plugins: product-id, refresh-packagekit, security, subscription-manager
This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
https://mirrors.tuna.tsinghua.edu.cn/epel/6/x86_64/repodata/repomd.xml: [Errno 14] problem making ssl connection
Trying other mirror.
Error: Cannot retrieve repository metadata (repomd.xml) for repository: epel. Please verify its path and try again
[root@2B2C-test-DB1 yum.repos.d]#
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