T.Zampetis T.Zampetis - 11 days ago 8
Python Question

Deploying Watson Visual recognition app fails

I created some custom classifiers locally and then i try to deploy on bluemix an app that classifies an image based on the classifiers i made.

When I try to deploy it, it failes to start.

import os
import json
from os.path import join, dirname
from os import environ
from watson_developer_cloud import VisualRecognitionV3
import time
start_time = time.time()

visual_recognition = VisualRecognitionV3(VisualRecognitionV3.latest_version, api_key='*************')

with open(join(dirname(__file__), './test170.jpg'), 'rb') as image_file:
print(json.dumps(visual_recognition.classify(images_file=image_file,threshold=0, classifier_ids=['Angle_971786581']), indent=2))

print("--- %s seconds ---" % (time.time() - start_time))


Even if I try to deploy a simple print , it failes to deploy, but the starter app i get from bluemix, or a Flask tutorial (https://www.ibm.com/blogs/bluemix/2015/03/simple-hello-world-python-app-using-flask/) i found online deploy just fine.

I'm very new to web programming and using cloud services so i'm totally lost.

Thank you.

Answer

Bluemix is expecting your python application to serve on a port. If your application isn't serving some kind of response on the port, it assumes the application failed to start.

# On Bluemix, get the port number from the environment variable PORT
# When running this app on the local machine, default the port to 8080
port = int(os.getenv('PORT', 8080))


@app.route('/')
def hello_world():
    return 'Hello World! I am running on port ' + str(port)

if __name__ == '__main__':
    app.run(host='0.0.0.0', port=port)

It looks like you're writing your code to just execute once and stop. Instead, make it do the work when someone hits your URL, like shown in the hello_world() function above.

Think about what you want to happen when someone goes to YOUR_APP_NAME.mybluemix.net

If you do not want your application to be a WEB application, but instead just execute once (a background worker application), then use the --no-route option at the end of your cf push command. Then, look at the logs using cf logs appname --recent to see the output of your application

https://console.ng.bluemix.net/docs/manageapps/depapps.html#deployingapps