Create provider network:

openstack network create  --share --external \
  --provider-physical-network provider \
  --provider-network-type flat provider

openstack subnet create --network provider \
  --allocation-pool start=192.168.122.20,end=192.168.122.200 \
  --dns-nameserver 192.168.122.1 --gateway 192.168.122.1 \
  --subnet-range 192.168.122.0/24 provider
  

openstack security group rule create --proto icmp default
openstack security group rule create --proto tcp --dst-port 22 default


Generate a key pair:
$ ssh-keygen -q -N ""

cd to your home directory
$ openstack keypair create --public-key ~/.ssh/id_rsa.pub mykey

verify
$ openstack keypair list


openstack flavor create --id 0 --vcpus 2 --ram 1024 --disk 10 m1.nano

Download debian openstack image
https://cdimage.debian.org/cdimage/openstack/
 
upload it:
openstack image create \
  --container-format bare \
  --disk-format qcow2 \
  --property hw_disk_bus=scsi \
  --property hw_scsi_model=virtio-scsi \
  --property os_type=linux \
  --property os_distro=debian \
  --property os_admin_user=debian \
  --property os_version='10.12.7' \
  --public \
  --file debian-10.12.7-20220706-openstack-amd64.qcow2 \
  debian-10.12.7-openstack-amd64


openstack network list
+--------------------------------------+----------+--------------------------------------+
| ID                                   | Name     | Subnets                              |
+--------------------------------------+----------+--------------------------------------+
| da5f9aa8-1bac-4aab-9931-0ce4d835783a | provider | eeeb4a46-8bb0-442b-b81c-20103c2d7f80 |
+--------------------------------------+----------+--------------------------------------+

copy ID as net-id while creating server

openstack server create --flavor m1.nano --image debian-10.12.7-openstack-amd64 \
  --nic net-id=b2d69a6e-3a77-4d55-94fd-308558088a3d --security-group default \
  --key-name mykey debianinstance


verify
# openstack server list