complete log
/Stage[main]/Main/Cinder::Type[iscsi]/Exec[cinder type-create iscsi]/returns: ERROR: Authentication failure: Gateway Timeout (HTTP 504)

Error: cinder type-create iscsi returned 1 instead of one of [0]
Error: /Stage[main]/Main/Cinder::Type[iscsi]/Exec[cinder type-create iscsi]/returns: change from notrun to 0 failed: cinder type-create iscsi returned 1 instead of one of [0]
Notice: /Stage[main]/Main/Cinder::Type[iscsi]/Cinder::Type_set[lvm]/Exec[cinder type-key iscsi set volume_backend_name=lvm]: Dependency Exec[cinder type-create iscsi] has failures: true
Warning: /Stage[main]/Main/Cinder::Type[iscsi]/Cinder::Type_set[lvm]/Exec[cinder type-key iscsi set volume_backend_name=lvm]: Skipping because of failed dependencies