无法在生产服务器上连接 Amazon RDS 但在本地服务器上连接

Question

I am using Amazon Postgre RDS. When I connect this RDS in my local server it is working perfectly fine but when I push it on github and pull on my EC2 then I am getting following error:

 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?

My settings.py is following:

 """ 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"), ]

My DB, username and password all are accurate because I have tested it on the local server.

Answer 1

Assuming both instances are running in the same VPC (like the default VPC) or in routed/peered VPCs:

Make sure you've created two separate security groups, one for the EC2 instance and one for the RDS instance. Add an inbound security group rule to the RDS SG and allow incoming PostgreSQL connections (5432/tcp) originating from the EC2's SG.

If you do everything via the AWS Console, all proper outbound rules will be applied automatically.

More information about RDS networking: https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_VPC.Scenarios.html#USER_VPC.Scenario1