无法在生产服务器上连接 Amazon RDS 但在本地服务器上连接

Question

我正在使用 Amazon Postgre RDS。 当我在本地服务器上连接此 RDS 时，它运行良好，但是当我将它推送到 github 并拉上我的 EC2 时，出现以下错误：

 Traceback (most recent call last): File "/home/ubuntu/myvenv/lib/python3.5/site-packages/django/utils/autoreload.py", line 227, in wrapper fn(*args, **kwargs) File "/home/ubuntu/myvenv/lib/python3.5/site-packages/django/core/management/commands/runserver.py", line 128, in inner_run self.check_migrations() File "/home/ubuntu/myvenv/lib/python3.5/site-packages/django/core/management/base.py", line 422, in check_migrations executor = MigrationExecutor(connections[DEFAULT_DB_ALIAS]) File "/home/ubuntu/myvenv/lib/python3.5/site-packages/django/db/migrations/executor.py", line 20, in __init__ self.loader = MigrationLoader(self.connection) File "/home/ubuntu/myvenv/lib/python3.5/site-packages/django/db/migrations/loader.py", line 52, in __init__ self.build_graph() File "/home/ubuntu/myvenv/lib/python3.5/site-packages/django/db/migrations/loader.py", line 209, in build_graph self.applied_migrations = recorder.applied_migrations() File "/home/ubuntu/myvenv/lib/python3.5/site-packages/django/db/migrations/recorder.py", line 65, in applied_migrations self.ensure_schema() File "/home/ubuntu/myvenv/lib/python3.5/site-packages/django/db/migrations/recorder.py", line 52, in ensure_schema if self.Migration._meta.db_table in self.connection.introspection.table_names(self.connection.cursor()): File "/home/ubuntu/myvenv/lib/python3.5/site-packages/django/db/backends/base/base.py", line 254, in cursor return self._cursor() File "/home/ubuntu/myvenv/lib/python3.5/site-packages/django/db/backends/base/base.py", line 229, in _cursor self.ensure_connection() File "/home/ubuntu/myvenv/lib/python3.5/site-packages/django/db/backends/base/base.py", line 213, in ensure_connection self.connect() File "/home/ubuntu/myvenv/lib/python3.5/site-packages/django/db/utils.py", line 94, in __exit__ six.reraise(dj_exc_type, dj_exc_value, traceback) File "/home/ubuntu/myvenv/lib/python3.5/site-packages/django/utils/six.py", line 685, in reraise raise value.with_traceback(tb) File "/home/ubuntu/myvenv/lib/python3.5/site-packages/django/db/backends/base/base.py", line 213, in ensure_connection self.connect() File "/home/ubuntu/myvenv/lib/python3.5/site-packages/django/db/backends/base/base.py", line 189, in connect self.connection = self.get_new_connection(conn_params) File "/home/ubuntu/myvenv/lib/python3.5/site-packages/django/db/backends/postgresql/base.py", line 176, in get_new_connection connection = Database.connect(**conn_params) File "/home/ubuntu/myvenv/lib/python3.5/site-packages/psycopg2/__init__.py", line 130, in connect conn = _connect(dsn, connection_factory=connection_factory, **kwasync) django.db.utils.OperationalError: could not connect to server: Connection timed out Is the server running on host "myammaji.cbgocwwown9z.ap-south-1.rds.amazonaws.com" (172.31.0.83) and accepting TCP/IP connections on port 5432?

我的 settings.py 如下：

 """ Django settings for backmyitem project. Generated by 'django-admin startproject' using Django 1.11. For more information on this file, see https://docs.djangoproject.com/en/1.11/topics/settings/ For the full list of settings and their values, see https://docs.djangoproject.com/en/1.11/ref/settings/ """ import os # Build paths inside the project like this: os.path.join(BASE_DIR, ...) BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__))) # Quick-start development settings - unsuitable for production # See https://docs.djangoproject.com/en/1.11/howto/deployment/checklist/ # SECURITY WARNING: keep the secret key used in production secret! SECRET_KEY = os.getenv('SECRET_KEY'), EMAIL_BACKEND = 'django.core.mail.backends.console.EmailBackend' # SECURITY WARNING: don't run with debug turned on in production! DEBUG = True ALLOWED_HOSTS = ['127.0.0.1', 'ec2-13-232-57-187.ap-south-1.compute.amazonaws.com'] # Application definition INSTALLED_APPS = [ 'django.contrib.admin', 'django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.messages', 'django.contrib.staticfiles', 'feed', ] MIDDLEWARE = [ 'django.middleware.security.SecurityMiddleware', 'django.contrib.sessions.middleware.SessionMiddleware', 'django.middleware.common.CommonMiddleware', 'django.contrib.auth.middleware.AuthenticationMiddleware', 'django.contrib.messages.middleware.MessageMiddleware', 'django.middleware.clickjacking.XFrameOptionsMiddleware', ] ROOT_URLCONF = 'backmyitem.urls' TEMPLATES = [ { 'BACKEND': 'django.template.backends.django.DjangoTemplates', 'DIRS': [os.path.join(BASE_DIR, 'templates')], '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', 'feed.views.notification_context', ], }, }, ] WSGI_APPLICATION = 'backmyitem.wsgi.application' # Database # https://docs.djangoproject.com/en/1.11/ref/settings/#databases DATABASES = { 'default': { 'ENGINE': 'django.db.backends.postgresql_psycopg2', 'NAME': 'dbname', 'USER': 'username', 'PASSWORD': password', 'HOST': 'myammaji.cbgocwwown9z.ap-south-1.rds.amazonaws.com', 'PORT': '5432' } } # Password validation # https://docs.djangoproject.com/en/1.11/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/1.11/topics/i18n/ LOGIN_REDIRECT_URL = '/report' LANGUAGE_CODE = 'en-us' TIME_ZONE = 'Asia/Kolkata' USE_I18N = True USE_L10N = True USE_TZ = True # Static files (CSS, JavaScript, Images) # https://docs.djangoproject.com/en/1.11/howto/static-files/ EMAIL_BACKEND = 'django.core.mail.backends.smtp.EmailBackend' EMAIL_HOST = 'smtp.gmail.com' EMAIL_PORT = 587 EMAIL_HOST_USER = 'saifulcseng@gmail.com' EMAIL_HOST_PASSWORD = 'N@sara0806196' EMAIL_USE_TLS = True STATIC_ROOT = os.path.join(BASE_DIR, "..", "static") STATIC_URL = '/static/' MEDIA_ROOT = os.path.join(BASE_DIR, "..", "media") MEDIA_URL = '/media/' STATICFILES_DIRS = [ os.path.join(BASE_DIR, "static"), ]

我的数据库、用户名和密码都是准确的，因为我已经在本地服务器上测试过了。

Answer 1

假设两个实例都在同一个 VPC（如默认 VPC）或路由/对等 VPC 中运行：

确保您已经创建了两个单独的安全组，一个用于 EC2 实例，另一个用于 RDS 实例。 向 RDS SG 添加入站安全组规则，并允许来自 EC2 SG 的传入 PostgreSQL 连接 (5432/tcp)。

如果您通过 AWS 控制台执行所有操作，则会自动应用所有正确的出站规则。

有关 RDS 网络的更多信息： https : //docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_VPC.Scenarios.html#USER_VPC.Scenario1