Sharing an image across multiple projects allows you to speed up deployment of instances.

MCS panel

When creating an image, select the "Allow access to all projects" item:

In this case, the image will not appear automatically in other projects - but a proposal will appear to add it to the project.

OpenStack CLI

To set up image sharing in the OpenStack client:

Get a list of images:

 $ openstack image list

Set up sharing for an image:

 $ openstack image set --shared <image ID>

Add a partner project for an image:

 $ openstack image add project <image ID> <partner project ID>

Next, the partner needs to confirm the addition of the image to the project:

 $ openstack image set --accept <image ID>

To view projects that have access to the image, run:

 $ openstack image member list <image ID>

To remove an image from a project, the owner should do:

 $ openstack image remove project <image ID> <project ID>