model-service/model_service/app.py

#!/usr/bin/env python3
import os
import sentry_sdk
from sentry_sdk.integrations.flask import FlaskIntegration
from flask import Flask
from werkzeug.middleware.proxy_fix import ProxyFix
from healthcheck import HealthCheck

# import stuff
from model import db

from utils import register_all_error_handlers, storage, health_database_status

# import views
from views import SVMView, CNNView, RootView

# Setup sentry
SENTRY_DSN = os.environ.get("SENTRY_DSN")
if SENTRY_DSN:
    sentry_sdk.init(
        dsn=SENTRY_DSN,
        integrations=[FlaskIntegration()],
        _experiments={"auto_enabling_integrations": True},
        traces_sample_rate=1.0,
        send_default_pii=True,
        release=os.environ.get('RELEASE_ID', 'test'),
        environment=os.environ.get('RELEASEMODE', 'dev')
    )

# create flask app
app = Flask(__name__)
app.wsgi_app = ProxyFix(app.wsgi_app, x_proto=1)
# configure flask app
app.config['SQLALCHEMY_DATABASE_URI'] = os.environ.get('DATABASE_URI', "sqlite://")  # Default to memory db
app.config['MINIO_ENDPOINT'] = os.environ['MINIO_ENDPOINT']
app.config['MINIO_ACCESS_KEY'] = os.environ['MINIO_ACCESS_KEY']
app.config['MINIO_SECRET_KEY'] = os.environ['MINIO_SECRET_KEY']
app.config['MINIO_SVM_BUCKET_NAME'] = os.environ.get('MINIO_SVM_BUCKET_NAME', 'svm')
app.config['MINIO_CNN_BUCKET_NAME'] = os.environ.get('MINIO_CNN_BUCKET_NAME', 'cnn')
app.config['MINIO_SECURE'] = os.environ.get('MINIO_SECURE', False)
app.config['MINIO_REGION'] = os.environ.get('MINIO_REGION', None)

# important stuff
app.secret_key = os.environ.get('SECRET_KEY', os.urandom(12))
# disable this for better performance
app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False

# initialize stuff
db.init_app(app)
storage.init_app(app)
health = HealthCheck(app, "/healthz")


@app.before_first_request
def create_db():
    db.create_all()


# register error handlers
register_all_error_handlers(app)

# register views
for view in [SVMView, CNNView, RootView]:
    view.register(app, trailing_slash=False, route_prefix='/model')

health.add_check(health_database_status)

# start debuggig if needed
if __name__ == "__main__":
    app.run(debug=True)