Comment 0 for bug 1718728

When an external Ceph cluster is used, the "filesystem_store_datadir" option is set in the "glance-api.conf" configuration file.

It should not, it's because of this condition:

  {% elif enable_ceph | bool and glance_backend_ceph | bool %}

When external is used "enable_ceph" is false and "glance_backend_ceph" is true.