add health endpoint

requirements.txt

@@ -6,4 +6,5 @@ marshmallow
 Flask-Classful
 gunicorn
 sentry_sdk
-flask_minio
+flask_minio
+py-healthcheck

storage_service/app.py

@@ -4,9 +4,10 @@ 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 utils import register_all_error_handlers, storage
+from utils import register_all_error_handlers, storage, health_database_status
 
 # import views
 from views import ObjectView
@@ -41,6 +42,9 @@ app.config['MINIO_BUCKET_NAME'] = os.environ['MINIO_BUCKET_NAME']
 app.config['MINIO_SECURE'] = os.environ.get('MINIO_SECURE', False)
 app.config['MINIO_REGION'] = os.environ.get('MINIO_REGION', None)
 
+health = HealthCheck(app, "/healthz")
+
+
 # register error handlers
 register_all_error_handlers(app)
 
@@ -48,6 +52,8 @@ register_all_error_handlers(app)
 for view in [ObjectView]:
     view.register(app, trailing_slash=False)
 
+health.add_check(health_database_status)
+
 # start debugging if needed
 if __name__ == "__main__":
     app.run(debug=True)

storage_service/utils/__init__.py

@@ -2,3 +2,4 @@
 from .require_decorators import json_required
 from .error_handlers import register_all_error_handlers
 from .storage import storage
+from .healthchecks import health_database_status

storage_service/utils/healthchecks.py

@@ -0,0 +1,23 @@
+#!/usr/bin/env python3
+
+from utils import storage
+
+"""
+Healthchek functions
+"""
+
+__author__ = "@tormakris"
+__copyright__ = "Copyright 2020, Birbnetes Team"
+__module_name__ = "healthchecks"
+__version__text__ = "1"
+
+
+def health_database_status():
+    is_database_working = True
+    output = 'storage is ok'
+    try:
+        storage.connection.list_buckets()
+    except Exception as e:
+        output = str(e)
+        is_database_working = False
+    return is_database_working, output