As a general rule, directories and files should not be writeable as the unpriviledged user, only be root, so the template should be:
root:<openstack-users-group> 0750 permissions
for example:
root:cinder 0750
As a general rule, directories and files should not be writeable as the unpriviledged user, only be root, so the template should be:
root: <openstack- users-group>
0750 permissions
for example:
root:cinder
0750