Python dev#u appserver无法在Ubuntu docker容器上启动（ValidationError:Value'；None'；for application与表达式不匹配）

我在升级docker容器后开始看到这个问题。我找不到为app engine使用旧软件包的方法。使用options=157.x.y获取旧版本在

apt-get

中不起作用

故障日志：

Traceback (most recent call last):
  File "/usr/lib/google-cloud-sdk/platform/google_appengine/dev_appserver.py", line 103, in <module>
    _run_file(__file__, globals())
  File "/usr/lib/google-cloud-sdk/platform/google_appengine/dev_appserver.py", line 97, in _run_file
    execfile(_PATHS.script_file(script_name), globals_)
  File "/usr/lib/google-cloud-sdk/platform/google_appengine/google/appengine/tools/devappserver2/devappserver2.py", line 322, in <module>
    main()
  File "/usr/lib/google-cloud-sdk/platform/google_appengine/google/appengine/tools/devappserver2/devappserver2.py", line 310, in main
    dev_server.start(options)
  File "/usr/lib/google-cloud-sdk/platform/google_appengine/google/appengine/tools/devappserver2/devappserver2.py", line 106, in start
    env_variables=parsed_env_variables)
  File "/usr/lib/google-cloud-sdk/platform/google_appengine/google/appengine/tools/devappserver2/application_configuration.py", line 851, in __init__
    env_variables)
  File "/usr/lib/google-cloud-sdk/platform/google_appengine/google/appengine/tools/devappserver2/application_configuration.py", line 131, in __init__
    self._config_path)
  File "/usr/lib/google-cloud-sdk/platform/google_appengine/google/appengine/tools/devappserver2/application_configuration.py", line 443, in _parse_configuration
    config.application = self._forced_app_id
  File "/usr/lib/google-cloud-sdk/platform/google_appengine/google/appengine/api/validation.py", line 361, in __setattr__
    value = self.GetValidator(key)(value, key)
  File "/usr/lib/google-cloud-sdk/platform/google_appengine/google/appengine/api/validation.py", line 599, in __call__
    return self.Validate(value, key)
  File "/usr/lib/google-cloud-sdk/platform/google_appengine/google/appengine/api/validation.py", line 881, in Validate
    return self.validator(value, key)
  File "/usr/lib/google-cloud-sdk/platform/google_appengine/google/appengine/api/validation.py", line 599, in __call__
    return self.Validate(value, key)
  File "/usr/lib/google-cloud-sdk/platform/google_appengine/google/appengine/api/validation.py", line 955, in Validate
    '\'%s\'' % (value, key, self.re.pattern))
google.appengine.api.validation.ValidationError: Value 'None' for application does not match expression '^(?:(?:[a-z\d\-]{1,100}\~)?(?:(?!\-)[a-z\d\-\.]{1,100}:)?(?!-)[a-z\d\-]{0,99}[a-z\d])$'

---

我的dev_appserver版本也开始这样做

我深入研究了代码，发现参数解析器将一个空的app_id命令行参数设置为

“None”

（是的，这是一个字符串，不是一个非类型）。顺便说一句，app_id regex与大写字符不匹配，因此ValidationError会触发。（我很高兴是这样，否则它会悄悄地将我的应用程序命名为“无”，从而导致更棘手的错误）

我现在的解决方法是使用

-A

标志从命令行显式传递应用程序的名称。请注意，这将覆盖app.yaml配置中的

应用程序

变量

我原以为我的argparse版本坏了，但现在听起来像是一个dev_appserver bug

    FROM ubuntu:16.04
    RUN apt-get upgrade
    RUN apt-get update

    RUN apt-get install -y wget
    RUN apt-get install -y curl
    RUN apt-get install -y apt-transport-https

    RUN echo "deb https://packages.cloud.google.com/apt cloud-sdk-xenial main" | tee -a /etc/apt/sources.list.d/google-cloud-sdk.list

    RUN wget -O - https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add -

    RUN apt-get update
    RUN cat /etc/apt/sources.list.d/google-cloud-sdk.list

    RUN apt-get install -y google-cloud-sdk
    RUN apt-get install -y google-cloud-sdk-app-engine-python

    WORKDIR /mycodepath
    EXPOSE 8080