code: def _create_server_rackspace(region,
                               access_key_id,
                               secret_access_key,
                               disk_name,
                               disk_size,
                               ami,
                               key_pair,
                               instance_type,
                               username,
                               instance_name,
                               tags={},
                               security_groups=None):
      
      nova = connect_to_rackspace(region, access_key_id, secret_access_key)
      log_yellow("Creating Rackspace instance...")
  
      flavor = nova.flavors.find(name=instance_type)
      image = nova.images.find(name=ami)
  
      server = nova.servers.create(name=instance_name,
                                   flavor=flavor.id,
                                   image=image.id,
                                   region=region,
                                   availability_zone=region,
                                   key_name=key_pair)
  
      while server.status == 'BUILD':
          log_yellow("Waiting for build to finish...")
          sleep(5)
          server = nova.servers.get(server.id)
  
      # check for errors
      if server.status != 'ACTIVE':
          log_red("Error creating rackspace instance")
          exit(1)
  
      # the server was assigned IPv4 and IPv6 addresses, locate the IPv4 address
      ip_address = server.accessIPv4
  
      if ip_address is None:
          log_red('No IP address assigned')
          exit(1)
  
      wait_for_ssh(ip_address)
      log_green('New server with IP address {0}.'.format(ip_address))
      # finally save the details or our new instance into the local state file
      save_rackspace_state_locally(instance_id=server.id,
                                   region=region,
                                   username=username,
                                   access_key_id=access_key_id,
                                   secret_access_key=secret_access_key)
docs: Creates Rackspace Instance and saves it state in a local json file