docker 新手求指导，应用 docker 化，但是数据库未 docker 化，容易出现应用和数据库连接的问题。

服务实现方式：

服务使用 flask + postgresql + gunicorn + supervisor + nginx 实现

用 docker 部署时, 运行服务后，访问 api 时候，

报错日志：

File "/usr/local/lib/python2.7/site-packages/sqlalchemy/sql/elements.py", line 287, in _execute_on_connection return connection._execute_clauseelement(self, multiparams, params) File "/usr/local/lib/python2.7/site-packages/sqlalchemy/engine/base.py", line 1107, in _execute_clauseelement distilled_params, File "/usr/local/lib/python2.7/site-packages/sqlalchemy/engine/base.py", line 1248, in _execute_context e, statement, parameters, cursor, context File "/usr/local/lib/python2.7/site-packages/sqlalchemy/engine/base.py", line 1466, in _handle_dbapi_exception util.raise_fom_cause(sqlalchemy_exception, exc_info) File "/usr/local/lib/python2.7/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/python2.7/site-packages/sqlalchemy/engine/base.py", line 1244, in _execute_context cursor, statement, parameters, context File "/usr/local/lib/python2.7/site-packages/sqlalchemy/engine/default.py", line 552, in do_execute cursor.execute(statement, parameters) OperationalError: (psycopg2.OperationalError) SSL SYSCALL error: EOF detected 

我已经搜索了报错OperationalError: (psycopg2.OperationalError) SSL SYSCALL error: EOF detected，但是没找到有效的解决办法。

不知道有没有同学遇到过类似问题，可否分享一下解决思路？