问题：No package supervisor available.
[root@localhost ~]# yum install -y supervisor
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base: mirrors.aliyun.com
* centos-sclo-rh: mirrors.cn99.com
* centos-sclo-sclo: mirrors.ustc.edu.cn
* extras: mirrors.aliyun.com
* updates: mirrors.aliyun.com
No package supervisor available.
Error: Nothing to do
安装epel-release
yum -y install epel-release
安装supervisor
yum -y install supervisor
