在Google app Engine上部署应用程序requirements.txt中的错误

Question

我无法在Google app Engine上部署应用程序

问题似乎来自我的requirements.txt文件：

• 当我部署示例building-an-app-1时，它运行良好
• 当我用我的文件替换原始的requirements.txt文件时，它不起作用*

这是我的requirements.txt：

Flask==1.1.1
flask-wtf==0.14.2
unidecode
numpy
openfoodfacts
os

当我删除最后两个包时，它就工作了

有什么问题

*gcloud deploy app返回：

File upload done.
Updating service [default]...failed.                                           
ERROR: (gcloud.app.deploy) Error Response: [9] Cloud build 813ab290-60a1-427c-830f-3a7e2d35f39b status: FAILURE.
Build error details: {"error":{"errorType":"BuildError","canonicalCode":"INVALID_ARGUMENT","errorId":"288DA415","errorMessage":"01 Feb 2020 17:23:53 INFO     Arguments: ['--parser_script=/usr/local/bin/ftl.par', '--src=', '--entrypoint=', '--name=eu.gcr.io/skilful-alpha-259713/app-engine-tmp/app/ttl-2h:34df8d6c-74e5-4583-bd94-165295531608', '--directory=/workspace', '--destination=/srv', '--cache-repository=eu.gcr.io/skilful-alpha-259713/app-engine-tmp/build-cache/ttl-7d', '--cache', '--builder-output-path=\"\"', '--additional-directory=/.googleconfig', '--python-cmd=/opt/python3.7/bin/python3.7', '--pip-cmd=/env/bin/python3.7 -m pip', '--venv-cmd=/opt/python3.7/bin/python3.7 -m venv /env', '-v=DEBUG', '--base=eu.gcr.io/gae-runtimes/python37:python37_20191019_3_7_4_RC00']
01 Feb 2020 17:23:53 INFO     Unparsed arguments: ['--name=eu.gcr.io/skilful-alpha-259713/app-engine-tmp/app/ttl-2h:34df8d6c-74e5-4583-bd94-165295531608', '--directory=/workspace', '--destination=/srv', '--cache-repository=eu.gcr.io/skilful-alpha-259713/app-engine-tmp/build-cache/ttl-7d', '--cache', '--builder-output-path=\"\"', '--additional-directory=/.googleconfig', '--python-cmd=/opt/python3.7/bin/python3.7', '--pip-cmd=/env/bin/python3.7 -m pip', '--venv-cmd=/opt/python3.7/bin/python3.7 -m venv /env', '-v=DEBUG', '--base=eu.gcr.io/gae-runtimes/python37:python37_20191019_3_7_4_RC00']
01 Feb 2020 17:23:53 INFO     Executing ['/usr/local/bin/ftl.par', '--name=eu.gcr.io/skilful-alpha-259713/app-engine-tmp/app/ttl-2h:34df8d6c-74e5-4583-bd94-165295531608', '--directory=/workspace', '--destination=/srv', '--cache-repository=eu.gcr.io/skilful-alpha-259713/app-engine-tmp/build-cache/ttl-7d', '--cache', '--builder-output-path=\"\"', '--additional-directory=/.googleconfig', '--python-cmd=/opt/python3.7/bin/python3.7', '--pip-cmd=/env/bin/python3.7 -m pip', '--venv-cmd=/opt/python3.7/bin/python3.7 -m venv /env', '-v=DEBUG', '--base=eu.gcr.io/gae-runtimes/python37:python37_20191019_3_7_4_RC00']
INFO     FTL version python-v0.17.0
INFO     Beginning FTL build for python
INFO     FTL arg passed: virtualenv_dir /env
INFO     FTL arg passed: ttl 168
INFO     FTL arg passed: python_cmd /opt/python3.7/bin/python3.7
INFO     FTL arg passed: cache True
INFO     FTL arg passed: virtualenv_cmd virtualenv
INFO     FTL arg passed: entrypoint None
INFO     FTL arg passed: exposed_ports None
INFO     FTL arg passed: pip_cmd /env/bin/python3.7 -m pip
INFO     FTL arg passed: tar_base_image_path None
INFO     FTL arg passed: export_cache_stats False
INFO     FTL arg passed: builder_output_path \"\"
INFO     FTL arg passed: destination_path /srv
INFO     FTL arg passed: sh_c_prefix False
INFO     FTL arg passed: base eu.gcr.io/gae-runtimes/python37:python37_20191019_3_7_4_RC00
INFO     FTL arg passed: cache_key_version v0.17.0
INFO     FTL arg passed: cache_salt 
INFO     FTL arg passed: cache_repository eu.gcr.io/skilful-alpha-259713/app-engine-tmp/build-cache/ttl-7d
INFO     FTL arg passed: venv_cmd /opt/python3.7/bin/python3.7 -m venv /env
INFO     FTL arg passed: name eu.gcr.io/skilful-alpha-259713/app-engine-tmp/app/ttl-2h:34df8d6c-74e5-4583-bd94-165295531608
INFO     FTL arg passed: global_cache False
INFO     FTL arg passed: upload True
INFO     FTL arg passed: fail_on_error True
INFO     FTL arg passed: output_path None
INFO     FTL arg passed: directory /workspace
INFO     FTL arg passed: additional_directory /.googleconfig
INFO     FTL arg passed: verbosity DEBUG
INFO     starting: full build
INFO     starting: builder initialization
INFO     Loading Docker credentials for repository 'eu.gcr.io/gae-runtimes/python37:python37_20191019_3_7_4_RC00'
INFO     Loading Docker credentials for repository 'eu.gcr.io/skilful-alpha-259713/app-engine-tmp/app/ttl-2h:34df8d6c-74e5-4583-bd94-165295531608'
INFO     builder initialization took 0 seconds
INFO     starting: build process for FTL image
INFO     starting: checking_cached_interpreter_layer
INFO     starting: check python version
INFO     `python version` full cmd:
/opt/python3.7/bin/python3.7 --version
I.

Answer 1

您是否尝试像这样在本地使用此requirements.txt文件

pip install -r requirements.txt

看起来requirements.txt文件的最后两行与可以随pip一起安装的Python包不对应

Answer 2

根据您收到的错误，Cloud Build未能安装requirements.txt文件中指定的最后两个依赖项。如果转到Cloud Build History page并检查失败的部署，您会注意到部署失败，并显示与此类似的错误消息：

Step #1 - "builder": INFO     `pip_download_wheels` had stderr output:
Step #1 - "builder":   Could not find a version that satisfies the requirement openfoodfacts==0.1.0 (from -r requirements.txt (line 10)) (from versions: )
Step #1 - "builder": No matching distribution found for openfoodfacts==0.1.0 (from -r requirements.txt (line 10))

不需要在requirements.txt中包含os module，因为它是Python 3.7标准库的一部分。例如，请注意，基于应用程序的main.py导入了datetime module，而这并没有在requirements.txt file上指定

Open Food Facts package实际上还没有在PyPI上发布（即，https://pypi.org/project/openfoodfacts/是404），因此您需要参考App Engine's documentation的相关部分并手动添加它，方式与此类似：

1. 在应用程序的项目目录上创建lib目录（例如，my using mkdir lib）
2. 通过发出以下命令将所需的依赖项复制到新创建的lib目录：pip3 install git+git://github.com/openfoodfacts/openfoodfacts-python.git -t lib
3. 转到lib目录并验证是否已正确安装所有依赖项
4. 修改requirements.txt文件以使用Open Food Facts包所需的依赖项。应该是这样的：

Flask==1.1.1
flask-wtf==0.14.2
unidecode==1.1.1
numpy==1.18.1
certifi==2019.11.28
chardet==3.0.4
idna==2.8
requests==2.22.0
urllib3==1.25.8

1. 以类似于import lib.openfoodfacts as openff的方式在应用程序中导入模块
2. 使用gcloud app deploy命令部署应用程序

最后，您应该有一个文件结构与此类似的项目目录：

building-an-app-1/
    app.yaml
    lib/
        ...
        openfoodfacts/
            autosuggest.py
            facets.py
            __init__.py
            openbeautyfacts.py
            openpetfoodfacts.py
            products.py
            __pycache__/
            utils.py
        ...
    main.py
    requirements.txt
    static/
        script.js
        style.css
    templates/
        index.html

其中，您可以使用以下命令导入main.py文件上的os和openfoodfacts模块：

...
import datetime
import os
import lib.openfoodfacts as openff
from flask import Flask, render_template
app = Flask(__name__)
@app.route('/')
....