Which OpenStack module is responsible for maintaining VM images across the compute cluster?

The module responsible for maintaining VM images across the compute cluster in OpenStack is actually not Keystone, but rather Swift.

OpenStack is a cloud computing platform that comprises several components, each responsible for different aspects of cloud management. Swift is the object storage service within OpenStack, designed to store and retrieve large amounts of unstructured data, including VM images. It provides a distributed storage solution that allows for the scalability and redundancy necessary to maintain virtual machine images across the compute cluster effectively.

Keystone, on the other hand, serves as the identity service for OpenStack, managing user authentication and providing token-based access to other OpenStack services, rather than handling the storage or management of VM images.

Neutron is responsible for networking within the OpenStack environment, managing network connections and IP addresses, while Cinder is the block storage service for providing persistent block storage for virtual machines. Neither Neutron nor Cinder manages VM images as Swift does.