Google平台: ImportError:部署中没有名为“google.api.core”的模块

Question

这是我在尝试使用gcloud app deploy进行部署时收到的错误。我以前已经成功地部署了相同的应用程序。我能够在本地机器上运行该应用程序，但在部署时会收到错误。

回溯：

Updating service [default]...failed.                                           
ERROR: (gcloud.app.deploy) Error Response: [9] 
Application startup error:
[2017-08-25 10:50:23 +0000] [1] [INFO] Starting gunicorn 19.7.1
[2017-08-25 10:50:23 +0000] [1] [INFO] Listening at: http://0.0.0.0:8080 (1)
[2017-08-25 10:50:23 +0000] [1] [INFO] Using worker: sync
[2017-08-25 10:50:23 +0000] [7] [INFO] Booting worker with pid: 7
[2017-08-25 10:50:23 +0000] [7] [ERROR] Exception in worker process
Traceback (most recent call last):
  File "/env/lib/python3.5/site-packages/gunicorn/arbiter.py", line 578, in spawn_worker
    worker.init_process()
  File "/env/lib/python3.5/site-packages/gunicorn/workers/base.py", line 126, in init_process
    self.load_wsgi()
  File "/env/lib/python3.5/site-packages/gunicorn/workers/base.py", line 135, in load_wsgi
    self.wsgi = self.app.wsgi()
  File "/env/lib/python3.5/site-packages/gunicorn/app/base.py", line 67, in wsgi
    self.callable = self.load()
  File "/env/lib/python3.5/site-packages/gunicorn/app/wsgiapp.py", line 65, in load
    return self.load_wsgiapp()
  File "/env/lib/python3.5/site-packages/gunicorn/app/wsgiapp.py", line 52, in load_wsgiapp
    return util.import_app(self.app_uri)
  File "/env/lib/python3.5/site-packages/gunicorn/util.py", line 352, in import_app
    __import__(module)
  File "/home/vmagent/app/main.py", line 19, in <module>
    app = bookshelf.create_app(config)
  File "/home/vmagent/app/bookshelf/__init__.py", line 49, in create_app
    model = get_model()
  File "/home/vmagent/app/bookshelf/__init__.py", line 107, in get_model
    from . import model_datastore
  File "/home/vmagent/app/bookshelf/model_datastore.py", line 16, in <module>
    from google.cloud import datastore
  File "/env/lib/python3.5/site-packages/google/cloud/datastore/__init__.py", line 61, in <module>
    from google.cloud.datastore.client import Client
  File "/env/lib/python3.5/site-packages/google/cloud/datastore/client.py", line 33, in <module>
    from google.cloud.datastore.query import Query
  File "/env/lib/python3.5/site-packages/google/cloud/datastore/query.py", line 19, in <module>
    from google.api.core import page_iterator
ImportError: No module named 'google.api.core'
[2017-08-25 10:50:23 +0000] [7] [INFO] Worker exiting (pid: 7)
[2017-08-25 10:50:24 +0000] [1] [INFO] Shutting down: Master
[2017-08-25 10:50:24 +0000] [1] [INFO] Reason: Worker failed to boot.

Answer 1

tl;dr:将您的google-cloud升级到0.27，它应该可以修复一些问题。

我相信这是一个带有新的google-cloud依赖项的bug。在我的例子中，google-cloud==0.25在其setup.py中引入了这些依赖项。

 'google-cloud-core >= 0.24.0, < 0.25dev',
 'google-cloud-datastore >= 1.0.0, < 2.0dev',

就在最近的8/24 (该问题提交前一天)，google-cloud-datastore包被更新为1.3.0。

不幸的是，google-cloud-datastore 1.3.0依赖于更新版本的google-cloud-core

 'google-cloud-core >= 0.27.0, < 0.28dev',

但是，这个版本控制冲突似乎没有得到pip的解决/没有警告，它使用的是旧版本。但是google-cloud-datastore想要from google.api.core import page_iterator，尽管google.api.core直到0.27.0才被添加，然后一切都崩溃了。

我相信"bug“存在于google-cloud===0.25中的过载、广泛的依赖项中(或者您正在使用的任何版本)。

我认为我们的“解决办法”是升级到最新版本的google-cloud=0.27。

尽管“适当的解决办法”是让google-cloud改进它们的版本控制依赖关系，而不是过于宽泛，否则就有可能破坏与已经发布的模块的向后兼容性。