Python 无法使用pg8000连接到AWS RDS Postgres，但适用于psycopg2

朋友们

我正在尝试从运行在EC2机器上的python脚本连接到AWS RDS中的Postgres实例。它与psycopg2/sqlalchemy配合得很好

from sqlalchemy import create_engine 
import psycopg2

db_string = 'postgresql+psycopg2://{user}:{password}@{host}:5432/{database}'.format(
        user=DB_USER,
        password=DB_PASS,
        host=DB_HOST,
        database=DB_NAME)

engine = create_engine(db_string, echo=True)    
conn = engine.connect()

from sqlalchemy import create_engine 
import pg8000

db_string = 'postgresql+pg8000://{user}:{password}@{host}:5432/{database}'.format(
        user=DB_USER,
        password=DB_PASS,
        host=DB_HOST,
        database=DB_NAME)

 engine = create_engine(db_string, echo=True)    
 conn = engine.connect()

但当我使用pg8000/sqlalchemy作为

from sqlalchemy import create_engine 
import psycopg2

db_string = 'postgresql+psycopg2://{user}:{password}@{host}:5432/{database}'.format(
        user=DB_USER,
        password=DB_PASS,
        host=DB_HOST,
        database=DB_NAME)

engine = create_engine(db_string, echo=True)    
conn = engine.connect()

from sqlalchemy import create_engine 
import pg8000

db_string = 'postgresql+pg8000://{user}:{password}@{host}:5432/{database}'.format(
        user=DB_USER,
        password=DB_PASS,
        host=DB_HOST,
        database=DB_NAME)

 engine = create_engine(db_string, echo=True)    
 conn = engine.connect()

错误信息是

InterfaceError: (pg8000.exceptions.InterfaceError) {'S': 'FATAL', 'V': 'FATAL', 'C': '28000', 'M': 'no pg_hba.conf entry for host "*.*.*.*", user "*", database "*", SSL off', 'F': 'auth.c', 'L': '513', 'R': 'ClientAuthentication'}
(Background on this error at: http://sqlalche.me/e/14/rvf5)

我还尝试设置

connect\u args={'ssl\u context'：True}

，但连接仍然失败。有人有什么想法吗？我正在使用python v3.6、sqlalchemy v1.4.15和pg8000 v1.19.4。

---

谢谢。

我的错。ssl_上下文适用于pg8000。谢谢。当您添加

ssl\u context:True

时，我假设错误消息会更改？这是你需要注意的错误。