当我在AWS Lambda上部署我的应用程序时，我得到错误

Question

我正在尝试在AWS lambda上运行我的flask api，使用serverless framework进行部署。

当我使用sls wsgi serve时，我的应用程序在本地工作正常，但当我部署到AWS Lambda时，我得到错误(502 bad gateway):

021-03-12T16:26:21.213+01:00    START RequestId: deedf3d6-eb1e-4f02-ac0c-47428c5bd553 Version: $LATEST
2021-03-12T16:26:21.216+01:00   module initialization error: Unable to import app.app
2021-03-12T16:26:21.331+01:00   END RequestId: deedf3b6-eb1e-4f02-ac0c-47428c5bd553
2021-03-12T16:26:21.331+01:00   REPORT RequestId: deedf3b6-eb1e-4f02-ac0c-47428c5bd553 Duration: 115.30 ms Billed Duration: 116 ms Memory Size: 1024 MB Max Memory Used: 28 MB
2021-03-12T16:26:21.331+01:00   module initialization error Unable to import app.app
2021-03-12T16:26:22.072+01:00   Traceback (most recent call last):
2021-03-12T16:26:22.072+01:00   File "/var/task/wsgi_handler.py", line 44, in import_app
2021-03-12T16:26:22.072+01:00   wsgi_module = importlib.import_module(wsgi_fqn_parts[-1])
2021-03-12T16:26:22.072+01:00   File "/var/lang/lib/python3.6/importlib/__init__.py", line 126, in import_module
2021-03-12T16:26:22.072+01:00   return _bootstrap._gcd_import(name[level:], package, level)
2021-03-12T16:26:22.072+01:00   File "<frozen importlib._bootstrap>", line 994, in _gcd_import
2021-03-12T16:26:22.072+01:00
Copy
File "<frozen importlib._bootstrap>", line 971, in _find_and_load
File "<frozen importlib._bootstrap>", line 971, in _find_and_load
2021-03-12T16:26:22.072+01:00   File "<frozen importlib._bootstrap>", line 955, in _find_and_load_unlocked
2021-03-12T16:26:22.072+01:00   File "<frozen importlib._bootstrap>", line 665, in _load_unlocked
2021-03-12T16:26:22.072+01:00   File "<frozen importlib._bootstrap_external>", line 678, in exec_module
2021-03-12T16:26:22.072+01:00   File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
2021-03-12T16:26:22.072+01:00   File "/var/task/app.py", line 10, in <module>
2021-03-12T16:26:22.072+01:00   from common.helpers import *
2021-03-12T16:26:22.072+01:00   File "/var/task/common/helpers.py", line 1, in <module>
2021-03-12T16:26:22.072+01:00   from common.db import db
2021-03-12T16:26:22.072+01:00   File "/var/task/common/db.py", line 1, in <module>
2021-03-12T16:26:22.072+01:00   from flask_pymongo import pymongo
2021-03-12T16:26:22.072+01:00   ModuleNotFoundError: No module named 'flask_pymongo'

我有两个分开的文件app.py和db.py，其中Flask_pymongo导入。

这是我的DockerFile

FROM lambci/lambda:build-python3.6
RUN pip3 --no-cache-dir install -r requirements.txt

requirements.txt:

Werkzeug==0.16.1
Flask_PyMongo==2.3.0
Flask==1.1.1
Flask_Limiter==1.3.1
Flask_JWT_Extended==3.22.0
pymongo==3.10.1
pymongo[tls,srv]
dnspython

和我的serverless.yml

service : my-flask-app
provider:
name: aws
runtime: python3.6
stage: dev
region: us-east-1
plugins:
- serverless-wsgi
- serverless-python-requirements
custom:
wsgi:
app: app.app
packRequirements: false
pythonBin: python3
pythonRequirements:
dockerizePip: non-linux
dockerFile: ./Dockerfile
package:
exclude:
- node_modules/**
- venv/**
functions:
app:
handler: wsgi_handler.handler
events:
- http: ANY /
- http: 'ANY {proxy+}'

有什么建议吗?

Answer 1

我认为你的Dockerfile不正确，你没有复制requirements.txt让pip为你安装软件包，因为依赖关系没有打包。应该是这样的

FROM lambci/lambda:build-python3.6
COPY requirements.txt requirements.txt
RUN pip3 --no-cache-dir install -r requirements.txt

你的Dockerfile给出这个错误:

Step 2/2 : RUN pip3 --no-cache-dir install -r requirements.txt
---> Running in 1cda237064f0
ERROR: Could not open requirements file: [Errno 2] No such file or directory: 'requirements.txt'

我不确定你是否在部署应用程序的构建日志中注意到这一点。

还有一件事，你不应该在你的Dockerfile中直接包含requirements.txt，假设你使用的是serverless-python需求，而不是任何其他变体。

pythonRequirements:
dockerizePip: non-linux
dockerFile: ./Dockerfile

Dockerfile

FROM lambci/lambda:build-python3.6
# Install your dependencies in case you want to install any
#RUN yum -y install myfavourite-pacakge

此配置将获取Dockerfile并将requirements.txt添加到其中。

构建过程中的本地代码依赖

交叉编译