Ceph在阿里云镜像源地址
https://mirrors.aliyun.com/ceph/

有时候从ceph默认下载时下载较慢，可以替换成阿里云镜像源
yum源初始化准备
因为建立ceph.repo文件将改变镜像源并且不会自动切回默认镜像地址
需要在所有节点上配置好阿里云的镜像源
具体位置在/etc/yum.repos.d/下新建一个ceph.repo

[Ceph]
name=Ceph packages for $basearch
baseurl=https://mirrors.aliyun.com/ceph/rpm-mimic/el7/$basearch
enabled=1
gpgcheck=1
type=rpm-md
gpgkey=https://mirrors.aliyun.com/ceph/keys/release.asc

[Ceph-noarch]
name=Ceph noarch packages
baseurl=https://mirrors.aliyun.com/ceph/rpm-mimic/el7/noarch
enabled=1
gpgcheck=1
type=rpm-md
gpgkey=https://mirrors.aliyun.com/ceph/keys/release.asc

[ceph-source]
name=Ceph source packages
baseurl=http://mirrors.aliyun.com/ceph/rpm-mimic/el7/SRPMS
enabled=1
gpgcheck=1
type=rpm-md
gpgkey=https://mirrors.aliyun.com/ceph/keys/release.asc