Ceph pacific repo on centos7 through cephadm

Hi,
I tried to install ceph pacific through cephadm on centos7.
I got repo error.
[root@cephmon01 ~]# **./cephadm install**
Installing packages ['cephadm']...
Non-zero exit code 1 from yum install -y cephadm
yum: stdout Loaded plugins: fastestmirror
yum: stdout Loading mirror speeds from cached hostfile
yum: stdout * base: ftp.funet.fi
yum: stdout * extras: ftp.funet.fi
yum: stdout * updates: ftp.funet.fi
**yum: stderr https://download.ceph.com/rpm-pacific/el7/x86_64/repodata/repomd.xml: [Errno 14] HTTPS Error 404 - Not Found**

Start by reproducing `./cephadm install` on CentOS 7 and inspect the yum request for `https://download.ceph.com/rpm-pacific/el7/x86_64/repodata/repomd.xml`. Determine whether the cookbook or installation workflow owns this repository configuration; done means the reported 404 is resolved or the supported platform limitation is clearly documented.

Written by the indexing model from the issue text.