DCN deployments [1] can include deploying glance-cache at the edge by using the following to get a cached image per node, but not per edge site:

parameter_defaults:
  GlanceBackend: swift
  GlanceCacheEnabled: true
  DistributedComputeHCIExtraConfig:
    nova::glance_api_servers: 'http://127.0.0.1:9292'
    glance::api::bind_host: '127.0.0.1'

This BZ tracks work to enable caching per site instead of just per node.


[1] https://docs.openstack.org/project-deploy-guide/tripleo-docs/latest/features/distributed_compute_node.html