# apt-get install prometheus-openstack-exporter
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:
prometheus-openstack-exporter : Depends: python3-cinderclient but it is not going to be installed
Depends: python3-keystoneclient but it is not going to be installed
Depends: python3-neutronclient but it is not going to be installed
Depends: python3-novaclient but it is not going to be installedAt the end of the dependency chain, we end up with
# apt-get install python3-msgpack 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: python3-msgpack : Depends: python3 (< 3.5) but 3.5.3-1 is to be installed E: Unable to correct problems, you have held broken packages.
I suspect that we need to move prometheus-openstack-exporter back to python2 while we're still running Mitaka.