maybe by doing something like:
```
ceph_client 'radosgw keyring' do
  name 'radosgw'
  filename "/var/lib/ceph/radosgw/ceph-radosgw.#{node['hostname']}/keyring"
  caps('mon' => 'allow rw', 'osd' => 'allow rwx')
end
```

But I really have to understand why radosgw need this and not mon / osd / mds :/