App Engine（Google Cloud）中我的 Django 应用程序中出现 500 服务器错误

Question

I am new to Google Cloud an I followed the steps in https://cloud.google.com/python/django/appengine and deployed the App successfully. However, when I go to the page https://PROJECT_ID.REGION_ID.r.appspot.com the next message is displayed:

Error: Server Error The server encountered an error and could not complete your request. Please try again in 30 seconds.

I have seen this is something really usual but cannot find any useful solution. I would appreciate any help.

---

my settings.py:

from pathlib import Path
import os
BASE_DIR = Path(__file__).resolve().parent.parent
SECRET_KEY = '…'
DEBUG = True
ALLOWED_HOSTS = ['*']
INSTALLED_APPS = [
    'KhalilApp.apps.KhalilappConfig',
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
]

MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
]

ROOT_URLCONF = 'DjangoServer.urls'

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [os.path.join(BASE_DIR,'KhalilApp/templates'), os.path.join(BASE_DIR,'Mapilib')],
        'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.debug',
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',
            ],
        },
    },
]

WSGI_APPLICATION = 'DjangoServer.wsgi.application'

import pymysql  # noqa: 402
pymysql.version_info = (1, 4, 6, 'final', 0)  # change mysqlclient version
pymysql.install_as_MySQLdb()
if os.getenv('GAE_APPLICATION', None):
    DATABASES = {
        'default': {
            'ENGINE': 'django.db.backends.mysql',
            'HOST': '/cloudsql/…’,
            'USER': 'maestros',
            'PASSWORD': '…',
            'NAME': 'principal',
        }
    }
else:
    DATABASES = {
        'default': {
            'ENGINE': 'django.db.backends.mysql',
            'HOST': '127.0.0.1',
            'PORT': '…',
            'NAME': 'principal',
            'USER': 'maestros',
            'PASSWORD': '…',
        }
    }
if os.getenv('TRAMPOLINE_CI', None):
    DATABASES = {
        'default': {
            'ENGINE': 'django.db.backends.sqlite3',
            'NAME': os.path.join(BASE_DIR, 'db.sqlite3')
        }
    }

AUTH_PASSWORD_VALIDATORS = [
    {
        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
    },
]
LANGUAGE_CODE = 'en-us'
TIME_ZONE = 'Europe/Madrid'
USE_I18N = True
USE_L10N = True
USE_TZ = True
STATIC_URL = '/static/'
STATIC_ROOT = 'static'

Answer 1

You have errors in your code. 500 Server Error means you have something wrong in your application.

Answer 2

If you want to configure gunicorn in App Engine Standard, please add the following line into your app.yaml file:

entrypoint: gunicorn -b :$PORT main:app

You can check the following Documentation to add an entrypoint to start gunicorn that listens on the port specified by the PORT environment variable