如何在 AWS Lambda 上使用 Python 從 Zappa 獲取堆棧跟蹤

Question

我在 AWS Lambda 上使用 Zappa 框架https://github.com/Miserlou/Zappa和 Python 和 Flask。 當它引發異常時，它會出現在 CloudWatch 日志中，但我無法辨認。 但是，我確實在調試版本中從 HTTP GET 返回了一個正常的 Flask 堆棧跟蹤。

我的問題是如何在日志/生產代碼中獲得合理的（Flask）堆棧跟蹤？ 當生產中出現異常時，我所擁有的只是日志消息。

來自 HTTP GET 的良好堆棧跟蹤：

Traceback (most recent call last):
  File "/var/task/handler.py", line 96, in handler
    response = Response.from_app(app, environ)
  File "/private/var/folders/1j/5zcxjzkx29b8tfgrh2y90wt80000gn/T/pip-build-v6XvIH/Werkzeug/werkzeug/wrappers.py", line 865, in from_app
  File "/private/var/folders/1j/5zcxjzkx29b8tfgrh2y90wt80000gn/T/pip-build-v6XvIH/Werkzeug/werkzeug/wrappers.py", line 57, in _run_wsgi_app
  File "/private/var/folders/1j/5zcxjzkx29b8tfgrh2y90wt80000gn/T/pip-build-v6XvIH/Werkzeug/werkzeug/test.py", line 871, in run_wsgi_app
  File "/private/var/folders/1j/5zcxjzkx29b8tfgrh2y90wt80000gn/T/pip-build-v6XvIH/zappa/zappa/middleware.py", line 78, in __call__
  File "/private/var/folders/1j/5zcxjzkx29b8tfgrh2y90wt80000gn/T/pip-build-v6XvIH/flask/flask/app.py", line 1836, in __call__
  File "/private/var/folders/1j/5zcxjzkx29b8tfgrh2y90wt80000gn/T/pip-build-v6XvIH/flask/flask/app.py", line 1820, in wsgi_app
  File "/private/var/folders/1j/5zcxjzkx29b8tfgrh2y90wt80000gn/T/pip-build-jvEYWI/flask-restful/flask_restful/__init__.py", line 271, in error_router
  File "/private/var/folders/1j/5zcxjzkx29b8tfgrh2y90wt80000gn/T/pip-build-v6XvIH/flask/flask/app.py", line 1403, in handle_exception
  File "/private/var/folders/1j/5zcxjzkx29b8tfgrh2y90wt80000gn/T/pip-build-jvEYWI/flask-restful/flask_restful/__init__.py", line 268, in error_router
  File "/private/var/folders/1j/5zcxjzkx29b8tfgrh2y90wt80000gn/T/pip-build-v6XvIH/flask/flask/app.py", line 1817, in wsgi_app
  File "/private/var/folders/1j/5zcxjzkx29b8tfgrh2y90wt80000gn/T/pip-build-v6XvIH/flask/flask/app.py", line 1477, in full_dispatch_request
  File "/private/var/folders/1j/5zcxjzkx29b8tfgrh2y90wt80000gn/T/pip-build-jvEYWI/flask-restful/flask_restful/__init__.py", line 271, in error_router
  File "/private/var/folders/1j/5zcxjzkx29b8tfgrh2y90wt80000gn/T/pip-build-v6XvIH/flask/flask/app.py", line 1381, in handle_user_exception
  File "/private/var/folders/1j/5zcxjzkx29b8tfgrh2y90wt80000gn/T/pip-build-jvEYWI/flask-restful/flask_restful/__init__.py", line 268, in error_router
  File "/private/var/folders/1j/5zcxjzkx29b8tfgrh2y90wt80000gn/T/pip-build-v6XvIH/flask/flask/app.py", line 1475, in full_dispatch_request
  File "/private/var/folders/1j/5zcxjzkx29b8tfgrh2y90wt80000gn/T/pip-build-v6XvIH/flask/flask/app.py", line 1461, in dispatch_request
  File "/private/var/folders/1j/5zcxjzkx29b8tfgrh2y90wt80000gn/T/pip-build-jvEYWI/flask-restful/flask_restful/__init__.py", line 477, in wrapper
  File "/private/var/folders/1j/5zcxjzkx29b8tfgrh2y90wt80000gn/T/pip-build-v6XvIH/flask/flask/views.py", line 84, in view
  File "/private/var/folders/1j/5zcxjzkx29b8tfgrh2y90wt80000gn/T/pip-build-jvEYWI/flask-restful/flask_restful/__init__.py", line 587, in dispatch_request
  File "/Users/notacat/src/aws-lambda/zappa/controllers/error_controller.py", line 15, in get
TestError: 'This is a test error'

難以理解 CloudWatch 日志中的堆棧跟蹤：

...Rlc3RFcnJvcjogJ1RoaXMgaXMgYSB0ZXN0IGVycm9yJzxiciAvPjwvcHJlPg==: 
Exception Traceback (most recent call last): 
File "/var/task/handler.py", line 161, in lambda_handler return LambdaHandler.lambda_handler(event, context) 
File "/var/task/handler.py", line 55, in lambda_handler return cls().handler(event, context) 
File "/var/task/handler.py", line 155, in handler raise Exception(exception) 
Exception: PCFET0NUWVBFIGh0bWw+NTAwLiBGcm9tIFphcHBhOiA8cHJlPidUaGlzIGl...

Answer 1

這看起來像一個老問題，但我使用的是 Zappa 0.45.1，當通過 CloudWatch AWS 終端和使用提供 CloudWatch 日志和一些附加信息的zappa tail發生錯誤時，我可以看到我的 python 堆棧跟蹤。