Ceph

Hello,

I am trying to install the ceph-mds package on a ubuntu-18.4 machine. But apt cant't seem to find it:

#apt install ceph-mds
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package ceph-mds is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'ceph-mds' has no installation candidate

The following repo and os are used

#cat /etc/apt/sources.list.d/download_ceph_com_debian_luminous.list
deb http://download.ceph.com/debian-luminous bionic main

# uname -a
Linux ceph-m1 4.15.0-39-generic #42-Ubuntu SMP Tue Oct 23 15:48:01 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

Any help is would be greatly appreciated.