If you are doing a fresh install of ubuntu cosmic you may come across a package issue when install ceph-common.

This is because there a few hard dependencies that are required and newer packages are proposed instead. I fixed it with the following command.

sudo apt install ceph-base ceph-common librbd1 librados2=12.2.4–0ubuntu1.1build1 python-cephfs libcephfs2=12.2.4–0ubuntu1.1build1

The full text of the error is below

Reading package lists... Done

Building dependency tree

Reading state information... Done

Some packages could not be installed. This may mean that you have

requested an impossible situation or if you are using the unstable

distribution that some required packages have not yet been created

or been moved out of Incoming.

The following information may help to resolve the situation:

The following packages have unmet dependencies.

ceph-common : Depends: librbd1 (= 12.2.4-0ubuntu1.1build1) but it is not going to be installed

Depends: python-cephfs (= 12.2.4-0ubuntu1.1build1) but it is not going to be installed

Depends: python-rados (= 12.2.4-0ubuntu1.1build1) but it is not going to be installed

Depends: python-rbd (= 12.2.4-0ubuntu1.1build1) but it is not going to be installed

Depends: libradosstriper1 (>= 0.87) but it is not going to be installed

E: Unable to correct problems, you have held broken packages.

By Chris Phillips on October 27, 2018.

Canonical link

Exported from Medium on April 6, 2019.