This seems to be ceilometer dependency and not mongodb dependency. So the mongodb changes will not get python-pymongo package. python-pymongo is mongodb python client that ceilometer package needs and hence needs to be added to the cache and package configs.
This seems to be ceilometer dependency and not mongodb dependency. So the mongodb changes will not get python-pymongo package. python-pymongo is mongodb python client that ceilometer package needs and hence needs to be added to the cache and package configs.