如何使用Openstack API创建浮动IP并将其分配给服务器

import requests
import json

# 认证，获取访问令牌
def authenticate():
    auth_url = 'http://your_auth_url'
    username = 'your_username'
    password = 'your_password'
    project_id = 'your_project_id'
    
    data = {
        "auth": {
            "identity": {
                "methods": ["password"],
                "password": {
                    "user": {
                        "name": username,
                        "domain": {"id": "default"},
                        "password": password
                    }
                }
            },
            "scope": {
                "project": {
                    "id": project_id
                }
            }
        }
    }
    
    headers = {'Content-Type': 'application/json'}
    response = requests.post(auth_url, data=json.dumps(data), headers=headers)
    return response.json()['token']['id']

# 创建浮动IP
def create_floating_ip(token):
    nova_url = 'http://your_nova_url'
    floating_ip_url = nova_url + '/os-floating-ips'
    
    headers = {
        'Content-Type': 'application/json',
        'X-Auth-Token': token
    }
    
    data = {}
    
    response = requests.post(floating_ip_url, data=json.dumps(data), headers=headers)
    return response.json()['floating_ip']

# 创建服务器实例
def create_server(token, floating_ip):
    nova_url = 'http://your_nova_url'
    server_url = nova_url + '/servers'
    
    headers = {
        'Content-Type': 'application/json',
        'X-Auth-Token': token
    }
    
    data = {
        'server': {
            'name': 'your_server_name',
            'flavorRef': 'your_flavor_id',
            'imageRef': 'your_image_id',
            'networks': [
                {
                    'uuid': 'your_network_id'
                }
            ],
            'security_groups': [
                {
                    'name': 'default'
                }
            ],
            'personality': [],
            'user_data': ''
        }
    }
    
    response = requests.post(server_url, data=json.dumps(data), headers=headers)
    
    # 将浮动IP与服务器绑定
    server_id = response.json()['server']['id']
    neutron_url = 'http://your_neutron_url'
    floating_ip_associate_url = neutron_url + '/v2.0/floatingips/' + floating_ip['id'] + '/associate'
    
    data = {
        'floatingip': {
            'floating_network_id': 'your_floating_network_id',
            'port_id': 'your_port_id',
            'fixed_ip_address': 'your_fixed_ip_address'
        }
    }
    
    response = requests.put(floating_ip_associate_url, data=json.dumps(data), headers=headers)

# 主程序
def main():
    token = authenticate()
    floating_ip = create_floating_ip(token)
    create_server(token, floating_ip)
    
if __name__ == '__main__':
    main()