Problem with nltk during app deployment on google cloud

问题

I tried to deploy my application on gcloud app engine, when the deployment finish and I tried to brows the URL, I got 502 server error. The log shows that there is problem with nltk package:

[31m>>> import nltk 
   >>> nltk.download('punkt') 
   [0m 
   Searched in: 
     - '/root/nltk_data' 
     - '/usr/share/nltk_data' 
     - '/usr/local/share/nltk_data' 
     - '/usr/lib/nltk_data' 
     - '/usr/local/lib/nltk_data' 
     - '/env/nltk_data' 
     - '/env/lib/nltk_data' 
     - ''  

I have put the necessary hardware requirement on my app.yaml file :

service: vapi
runtime: python
env: flex
health_check:
    enable_health_check: True
    check_interval_sec: 5
    timeout_sec: 4
    unhealthy_threshold: 2
    healthy_threshold: 2
entrypoint: gunicorn -b :$PORT wsgi:app
runtime_config:
    python_version: 3.5
resources:
  cpu: 2
  memory_gb: 8
  disk_size_gb: 20

I have tried to install the nltk packages into one of the search path shown in the log above.

also, I have created app engine configuration file:

# appengine_config.py
from google.appengine.ext import vendor

# Add any libraries install in the "lib" folder.
vendor.add(os.path.join(os.path.dirname(os.path.realpath(__file__)), 'lib'))

any suggestions?

回答1:

You're mixing up the documentation for the standard environment with the one for the flexible environment.

Installing dependencies into the lib directory and using a appengine_config.py file is specific for the 1st generation standard environment.

For the flexible environment you specify your python dependencies using the requirements.txt file, see Using Python Libraries:

The Python runtime will automatically install all dependencies declared in your requirements.txt during deployment.

For non-python dependencies or those which aren't pip-installable you can use a custom runtime, see Up-to-date pip with AppEngine Python flex env?

Maybe of interest: How to tell if a Google App Engine documentation page applies to the 1st/2nd generation standard or the flexible environment

来源：https://stackoverflow.com/questions/56110708/problem-with-nltk-during-app-deployment-on-google-cloud