Description of problem:

Today the only way to manage the glance cache is to use glance-cache-manage local tool.
This raises several issues:
* No centralised way to manage cache; need to connect to each nodes.
* Requires ssh access and appropriates permissions to the glance cache node(s)

This RFE aims to include basic image cache management into the Glance API.

At a minimum:
* List glance cache nodes
* List cached images on a specific node
* Queue an image for caching on a specific node
* List queued images on a specific node
* Delete an image from the cache queue
* Purge an image from a specific node

Optionally:
* Purge all images from a specific node

Goal is to have feature parity with glance-cache-manage.

Targeted use cases: DCN with or without persistent storage at the edge.

Version-Release number of selected component (if applicable):

16

How reproducible:


Steps to Reproduce:
1.
2.
3.

Actual results:


Expected results:


Additional info: