我有一个可连接到AWS RDS的python应用程序。
连接字符串使我可以在Docker中正常运行应用程序：
postgresql://<usr>:<pwd>@<svr>/<db>
以下2个连接字符串与以下错误一起运行：
postgresql://<usr>:<pwd>@<svr>/<db>?sslmode=verify-full&sslrootcert=xxx
postgresql://<usr>:<pwd>@<svr>/<db>?sslmode=require
错误（底部代码段）：
Traceback (most recent call last):
File "/usr/local/lib/python3.7/site-packages/flask/app.py", line 2309, in __call__
return self.wsgi_app(environ, start_response)
File "/usr/local/lib/python3.7/site-packages/flask/app.py", line 2295, in wsgi_app
response = self.handle_exception(e)
File "/usr/local/lib/python3.7/site-packages/flask_restful/__init__.py", line 269, in error_router
return original_handler(e)
File "/usr/local/lib/python3.7/site-packages/flask/app.py", line 1741, in handle_exception
reraise(exc_type, exc_value, tb)
File "/usr/local/lib/python3.7/site-packages/flask/_compat.py", line 34, in reraise
raise value.with_traceback(tb)
File "/usr/local/lib/python3.7/site-packages/flask/app.py", line 2292, in wsgi_app
response = self.full_dispatch_request()
File "/usr/local/lib/python3.7/site-packages/flask/app.py", line 1815, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/usr/local/lib/python3.7/site-packages/flask_restful/__init__.py", line 269, in error_router
return original_handler(e)
File "/usr/local/lib/python3.7/site-packages/flask/app.py", line 1718, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "/usr/local/lib/python3.7/site-packages/flask/_compat.py", line 34, in reraise
raise value.with_traceback(tb)
File "/usr/local/lib/python3.7/site-packages/flask/app.py", line 1813, in full_dispatch_request
rv = self.dispatch_request()
File "/usr/local/lib/python3.7/site-packages/flask/app.py", line 1799, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "/usr/local/lib/python3.7/site-packages/flask_restful/__init__.py", line 458, in wrapper
resp = resource(*args, **kwargs)
File "/usr/local/lib/python3.7/site-packages/flask/views.py", line 88, in view
return self.dispatch_request(*args, **kwargs)
File "/usr/local/lib/python3.7/site-packages/flask_restful/__init__.py", line 573, in dispatch_request
resp = meth(*args, **kwargs)
File "./database/database.py", line 29, in post
database.save()
File "./database/database.py", line 35, in save
db.session.commit()
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/orm/scoping.py", line 162, in do
return getattr(self.registry(), name)(*args, **kwargs)
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/orm/session.py", line 1026, in commit
self.transaction.commit()
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/orm/session.py", line 493, in commit
self._prepare_impl()
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/orm/session.py", line 472, in _prepare_impl
self.session.flush()
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/orm/session.py", line 2451, in flush
self._flush(objects)
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/orm/session.py", line 2589, in _flush
transaction.rollback(_capture_exception=True)
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/util/langhelpers.py", line 68, in __exit__
compat.reraise(exc_type, exc_value, exc_tb)
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/util/compat.py", line 129, in reraise
raise value
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/orm/session.py", line 2549, in _flush
flush_context.execute()
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/orm/unitofwork.py", line 422, in execute
rec.execute(self)
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/orm/unitofwork.py", line 589, in execute
uow,
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/orm/persistence.py", line 213, in save_obj
) in _organize_states_for_save(base_mapper, states, uowtransaction):
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/orm/persistence.py", line 374, in _organize_states_for_save
base_mapper, uowtransaction, states
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/orm/persistence.py", line 1585, in _connections_for_states
connection = uowtransaction.transaction.connection(base_mapper)
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/orm/session.py", line 312, in connection
return self._connection_for_bind(bind, execution_options)
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/orm/session.py", line 418, in _connection_for_bind
conn = self._parent._connection_for_bind(bind, execution_options)
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/orm/session.py", line 430, in _connection_for_bind
conn = bind._contextual_connect()
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/engine/base.py", line 2226, in _contextual_connect
self._wrap_pool_connect(self.pool.connect, None),
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/engine/base.py", line 2266, in _wrap_pool_connect
e, dialect, self
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/engine/base.py", line 1536, in _handle_dbapi_exception_noconnection
util.raise_from_cause(sqlalchemy_exception, exc_info)
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/util/compat.py", line 383, in raise_from_cause
reraise(type(exception), exception, tb=exc_tb, cause=cause)
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/util/compat.py", line 128, in reraise
raise value.with_traceback(tb)
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/engine/base.py", line 2262, in _wrap_pool_connect
return fn()
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/pool/base.py", line 354, in connect
return _ConnectionFairy._checkout(self)
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/pool/base.py", line 751, in _checkout
fairy = _ConnectionRecord.checkout(pool)
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/pool/base.py", line 483, in checkout
rec = pool._do_get()
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/pool/impl.py", line 138, in _do_get
self._dec_overflow()
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/util/langhelpers.py", line 68, in __exit__
compat.reraise(exc_type, exc_value, exc_tb)
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/util/compat.py", line 129, in reraise
raise value
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/pool/impl.py", line 135, in _do_get
return self._create_connection()
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/pool/base.py", line 299, in _create_connection
return _ConnectionRecord(self)
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/pool/base.py", line 428, in __init__
self.__connect(first_connect_check=True)
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/pool/base.py", line 630, in __connect
connection = pool._invoke_creator(self)
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/engine/strategies.py", line 114, in connect
return dialect.connect(*cargs, **cparams)
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/engine/default.py", line 453, in connect
return self.dbapi.connect(*cargs, **cparams)
File "/usr/local/lib/python3.7/site-packages/psycopg2/__init__.py", line 130, in connect
conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
sqlalchemy.exc.OperationalError: (psycopg2.OperationalError) could not create SSL context: library has no ciphers
当我使用所有3种连接类型运行时，它可以在除Docker之外的所有机器上运行。为什么只有在Docker中会发生这种情况？
我忘了声明，我正在使用SQLAlchemy连接到postgresql。
谢谢。
我的Dockerfile：
FROM python:3.7.2-stretch
COPY . /
RUN pip install -r requirements.txt
EXPOSE 5000
WORKDIR /models
CMD ["uwsgi", "--ini", "uwsgi.ini"]
我的docker-compose
version: '3.1'
services:
modelling:
build:
context: ./modelling
image: users-api
container_name: modelling
ports:
- 5000:5000
restart: always
我的要求：
aniso8601==6.0.0
argon2-cffi==19.1.0
atomicwrites==1.3.0
attrs==19.1.0
cffi==1.12.2
Click==7.0
Flask==1.0.2
Flask-JWT-Extended==3.18.0
Flask-RESTful==0.3.7
Flask-SQLAlchemy==2.3.2
itsdangerous==1.1.0
Jinja2==2.10
MarkupSafe==1.1.1
more-itertools==7.0.0
pluggy==0.9.0
psycopg2-binary==2.7.7
py==1.8.0
pycparser==2.19
PyJWT==1.7.1
pytest==4.3.1
pytz==2018.9
six==1.12.0
SQLAlchemy==1.3.1
uWSGI==2.0.18
Werkzeug==0.15.1
答案 0 :(得分：1)
尝试在您的requirements.txt中更改以下字符串：
psycopg2-binary==2.7.7
到
psycopg2==2.7.7 --no-binary :all: