gistfile1.txt

1 - create project

openstack project create --domain Default --description "Cinder image volume cache internal project" cinder_image_volume_cache

#set the quota (# of volume and volume GB. (a few extra free space won't hurt, cinder will cleanup according to the configuration but may be a bit higher.)

openstack quota set --gigabytes 300 --volumes 40 cinder_image_volume_cache

2 - create user
openstack user create --domain default cinder_image_volume_cache_user ## no pass needed here..

3 - add user to project
openstack role add --project cinder_image_volume_cache --user cinder_image_volume_cache_user _member_

4- add yourself if needed..
openstack role add --project cinder_image_volume_cache --user <me>  _member_

4- need under you cinder_backends config, there : https://github.com/openstack/openstack-ansible/blob/master/etc/openstack_deploy/user_variables.yml.prod-ceph.example#L32
          image_volume_cache_enabled: True
          image_volume_cache_max_size_gb: 250
          image_volume_cache_max_count: 30

5- need to add the project id and user id to the conf:
user_variables.yml :
cinder_cinder_conf_overrides:
  DEFAULT:
    cinder_internal_tenant_project_id: <<uuid fo the project created earlier>>
    cinder_internal_tenant_user_id: <<uuid of the user created earlier>>

6- run cinder playbook

7- celebrate by leaving early (and leaving support stuff to your coleague if it breaks stuff)