我正在按照这个文档在 Ubuntu 中安装 openstack：
https://wiki.opendaylight.org/view/OVSDB:OVSDB_OpenStack_Guide
但是，我无法创建中子网络。我收到以下错误：
$ neutron net-create my-private-net neutron subnet-create $(neutron net-list | grep 'my-private-net' | awk '{print $2}') 10.254.0.0/24 --name my-private-subnet --ip-version 4 --gateway 10.254.0.1 --allocation-pool start=10.254.0.2,end=10.254.0.254
Discovering versions from the identity service failed when creating the password plugin. Attempting to determine version from URL.
Internal Server Error (HTTP 500)
Discovering versions from the identity service failed when creating the password plugin. Attempting to determine version from URL.
Internal Server Error (HTTP 500)
我的 local.conf
[[local|localrc]]
HOST_IP=192.168.0.3
FLOATING_RANGE=1.2.3.128/25
FIXED_RANGE=10.11.12.0/24
FIXED_NETWORK_SIZE=256
FLAT_INTERFACE=eth0
ADMIN_PASSWORD=stack
MYSQL_PASSWORD=stack
RABBIT_PASSWORD=stack
SERVICE_PASSWORD=stack
SERVICE_TOKEN=1a672b16de58d47d45d7
有没有其他人遇到过这个问题？我该如何解决这个问题？