Ubuntu: Make sure python3-rados is installed

The rbd backend implementation of glance_store requires not only
python3-rbd but also python3-rados. In CentOS the python3-rados package
is installed as a dependency of python3-rbd, but in Debian and Ubuntu
that dependency is not defined and we should install python3-rados
explicitly.

This fixes the missing python3-rados package in Ubuntu, by using
the meta python3-ceph package which installs all python libraries.

Closes-Bug: #2002934
Change-Id: I620c607f09e98f1ce1d7ba34d1b797dbef8402ad

manifests/params.pp

@@ -26,11 +26,7 @@ class glance::params {
       $package_name            = undef
       $api_package_name        = 'glance-api'
       $api_service_name        = 'glance-api'
-      if $::operatingsystem == 'Debian' {
-        $pyceph_package_name   = 'python3-ceph'
-      } else {
-        $pyceph_package_name   = 'python3-rbd'
-      }
+      $pyceph_package_name     = 'python3-ceph'
       $lock_path               = '/var/lock/glance'
       $glance_wsgi_script_path = '/usr/lib/cgi-bin/glance'
     }

releasenotes/notes/bug-2002934-bc8efa00a7dbadfd.yaml

@@ -0,0 +1,6 @@
+---
+fixes:
+  - |
+    Now ``python3-ceph`` package, instead of ``python3-rbd`` package, is
+    installed when rbd backend is used. This fixes the missing
+    ``python3-rados`` package.

spec/classes/glance_backend_rbd_spec.rb

@@ -61,11 +61,7 @@ describe 'glance::backend::rbd' do
       let(:platform_params) do
         case facts[:osfamily]
         when 'Debian'
-          if facts[:operatingsystem] == 'Debian'
-            { :pyceph_package_name => 'python3-ceph' }
-          else
-            { :pyceph_package_name => 'python3-rbd' }
-          end
+          { :pyceph_package_name => 'python3-ceph' }
         when 'RedHat'
           { :pyceph_package_name => 'python3-rbd' }
         end

spec/defines/glance_backend_multistore_rbd_spec.rb

@@ -85,11 +85,7 @@ describe 'glance::backend::multistore::rbd' do
       let(:platform_params) do
         case facts[:osfamily]
         when 'Debian'
-          if facts[:operatingsystem] == 'Debian'
-            { :pyceph_package_name => 'python3-ceph' }
-          else
-            { :pyceph_package_name => 'python3-rbd' }
-          end
+          { :pyceph_package_name => 'python3-ceph' }
         when 'RedHat'
           { :pyceph_package_name => 'python3-rbd' }
         end