我已在 AstraDB 上托管了我的 Cassandra DB，并尝试将我的 Django 服务器连接到它。这也是我第一次使用 Django，所以我对它的工作原理有点困惑。在我的
settings.pyfrom pathlib import Path
from cassandra import ConsistencyLevel
from cassandra.cluster import Cluster
from cassandra.auth import PlainTextAuthProvider
import os
from dotenv import load_dotenv
import dse
load_dotenv()
# Build paths inside the project like this: BASE_DIR / 'subdir'.
BASE_DIR = Path(__file__).resolve().parent.parent
# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/5.0/howto/deployment/checklist/
# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = 'SECURE_KEY'
# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = True
ALLOWED_HOSTS = []
# Application definition
INSTALLED_APPS = [
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'blogs',
'graphene_django',
]
INSTALLED_APPS = ['django_cassandra_engine'] + INSTALLED_APPS
SESSION_ENGINE = 'django_cassandra_engine.sessions.backends.db'
MIDDLEWARE = [
'django.middleware.security.SecurityMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware',
]
ROOT_URLCONF = 'core.urls'
TEMPLATES = [
{
'BACKEND': 'django.template.backends.django.DjangoTemplates',
'DIRS': [],
'APP_DIRS': True,
'OPTIONS': {
'context_processors': [
'django.template.context_processors.debug',
'django.template.context_processors.request',
'django.contrib.auth.context_processors.auth',
'django.contrib.messages.context_processors.messages',
],
},
},
]
WSGI_APPLICATION = 'core.wsgi.application'
# Database
# https://docs.djangoproject.com/en/5.0/ref/settings/#databases
# DATABASES = {
# 'default': {
# 'ENGINE': 'django.db.backends.sqlite3',
# 'NAME': BASE_DIR / 'db.sqlite3',
# }
# }
DATABASES = {
'default': {
'ENGINE': 'django_cassandra_engine',
'NAME': 'jasontechblog',
'OPTIONS': {
'connection': {
'auth_provider': PlainTextAuthProvider('CLIENT_ID', 'CLIENT_SECRET'),
'cloud': {
'secure_connect_bundle': 'secure-connect-jasontechblog.zip'
}
},
}
}
}
# Password validation
# https://docs.djangoproject.com/en/5.0/ref/settings/#auth-password-validators
AUTH_PASSWORD_VALIDATORS = [
{
'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
},
{
'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
},
{
'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
},
{
'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
},
]
# Internationalization
# https://docs.djangoproject.com/en/5.0/topics/i18n/
LANGUAGE_CODE = 'en-us'
TIME_ZONE = 'UTC'
USE_I18N = True
USE_TZ = True
# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/5.0/howto/static-files/
STATIC_URL = 'static/'
# Default primary key field type
# https://docs.djangoproject.com/en/5.0/ref/settings/#default-auto-field
DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'
我已经确保我所有的密钥和 ID 都是正确的，但是当我尝试运行
python3 manage.py syncdbTraceback (most recent call last):
File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/django_cassandra_engine/connection.py", line 76, in register
connection.get_connection(name=self.alias)
File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/dse/cqlengine/connection.py", line 242, in get_connection
raise CQLEngineException("Connection name '{0}' doesn't exist in the registry.".format(name))
dse.cqlengine.CQLEngineException: Connection name 'default' doesn't exist in the registry.
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/urllib/request.py", line 1348, in do_open
h.request(req.get_method(), req.selector, req.data, headers,
File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/http/client.py", line 1286, in request
self._send_request(method, url, body, headers, encode_chunked)
File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/http/client.py", line 1332, in _send_request
self.endheaders(body, encode_chunked=encode_chunked)
File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/http/client.py", line 1281, in endheaders
self._send_output(message_body, encode_chunked=encode_chunked)
File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/http/client.py", line 1041, in _send_output
self.send(msg)
File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/http/client.py", line 979, in send
self.connect()
File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/http/client.py", line 1458, in connect
self.sock = self._context.wrap_socket(self.sock,
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/ssl.py", line 517, in wrap_socket
return self.sslsocket_class._create(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/ssl.py", line 1108, in _create
self.do_handshake()
File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/ssl.py", line 1379, in do_handshake
self._sslobj.do_handshake()
ssl.SSLError: [SSL: NO_CIPHERS_AVAILABLE] no ciphers available (_ssl.c:1006)
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/dse/datastax/cloud/__init__.py", line 128, in read_metadata_info
response = urlopen(url, context=config.ssl_context, timeout=timeout)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/urllib/request.py", line 216, in urlopen
return opener.open(url, data, timeout)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/urllib/request.py", line 519, in open
response = self._open(req, data)
^^^^^^^^^^^^^^^^^^^^^
File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/urllib/request.py", line 536, in _open
result = self._call_chain(self.handle_open, protocol, protocol +
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/urllib/request.py", line 496, in _call_chain
result = func(*args)
^^^^^^^^^^^
File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/urllib/request.py", line 1391, in https_open
return self.do_open(http.client.HTTPSConnection, req,
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/urllib/request.py", line 1351, in do_open
raise URLError(err)
urllib.error.URLError: <urlopen error [SSL: NO_CIPHERS_AVAILABLE] no ciphers available (_ssl.c:1006)>
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/Users/jasontan/Documents/Jason/jason-tech-blog/jason-tech-blog/server/manage.py", line 22, in <module>
main()
File "/Users/jasontan/Documents/Jason/jason-tech-blog/jason-tech-blog/server/manage.py", line 18, in main
execute_from_command_line(sys.argv)
File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/django/core/management/__init__.py", line 442, in execute_from_command_line
utility.execute()
File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/django/core/management/__init__.py", line 416, in execute
django.setup()
File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/django/__init__.py", line 24, in setup
apps.populate(settings.INSTALLED_APPS)
File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/django/apps/registry.py", line 116, in populate
app_config.import_models()
File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/django_cassandra_engine/apps.py", line 60, in import_models
self.connect()
File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/django_cassandra_engine/apps.py", line 57, in connect
conn.connect()
File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/django_cassandra_engine/base/__init__.py", line 108, in connect
self.connection = CassandraConnection(self.alias, **settings)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/django_cassandra_engine/connection.py", line 72, in __init__
self.register()
File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/django_cassandra_engine/connection.py", line 86, in register
cluster = Cluster(**self.cluster_options)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/dse/cluster.py", line 1031, in __init__
cloud_config = dscloud.get_cloud_config(cloud)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/dse/datastax/cloud/__init__.py", line 90, in get_cloud_config
return read_metadata_info(config, cloud_config)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/dse/datastax/cloud/__init__.py", line 131, in read_metadata_info
raise DriverException("Unable to connect to the metadata service at %s" % url)
dse.DriverException: Unable to connect to the metadata service at https://9b4178b8-3300-48f8-b03b-cdf66785c621-us-east1.db.astra.datastax.com:29080/metadata
我想知道我是否错过了什么？或者我的
settings.py对于我正在使用的上下文：
Django==5.0.4
django-cassandra-engine==1.9.0
cassandra-driver==3.29.1
我尝试在线搜索解决方案，但无法确定代码中的问题。我希望在数据库中可以看到一个描述我定义的模型的表
谢谢你的提问！根据您报告的错误消息，您的 Python 安装似乎不支持 Astra 的 SSL 实现支持的密码集。您需要一些可以与以下密码套件之一配合使用的东西：
PORT STATE SERVICE
29042/tcp open unknown
| ssl-enum-ciphers:
| TLSv1.2:
| ciphers:
| TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (secp256r1) - A
| TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (secp256r1) - A
| TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 (secp256r1) - A
| compressors:
| NULL
| cipher preference: client
| TLSv1.3:
| ciphers:
| TLS_AKE_WITH_AES_128_GCM_SHA256 (ecdh_x25519) - A
| TLS_AKE_WITH_AES_256_GCM_SHA384 (ecdh_x25519) - A
| TLS_AKE_WITH_CHACHA20_POLY1305_SHA256 (ecdh_x25519) - A
| cipher preference: client
我希望任何相当现代的 OpenSSL 版本都可以很好地处理这些问题。