1.安装依赖环境
yum install gcc make python-devel openssl-devel graphviz autoconf automake rpm-build redhat-rpm-config libtool
2.下载 kernel 源码：
yum install "kernel-devel-uname-r == $(uname -r)"
3.创建rpmbuild目录结构
mkdir rpmbuild/{BUILD,SOURCES,SPECS,RPMS,BUILDROOT} -pv
4.下载源码，解压，编译
cp ceph-12.2.8.tar.gz rpmbuild/SOURCES/
tar -xvf ceph-12.2.8.tar.gz
cp ceph-12.2.8/ceph.spec rpmbuild/SPECS/
5.下载ceph依赖包
cd ceph-12.2.8/ && ./install-deps.sh
6.编译
rpmbuild -bb rpmbuild/SPECS/ceph.spec --nocheck
7.问题解决：
问题1：/usr/share/selinux/devel/policyhelp 被 ceph-2:12.2.8-0.el7.centos.x86_64 需要
解决：yum install selinux-policy-doc -y