Add a new configurable health check, to make sure production instances are not taken down by Redis or non-local DB issues

endpoints/web.py

@@ -5,6 +5,7 @@ from flask import (abort, redirect, request, url_for, make_response, Response,
                    Blueprint, send_from_directory, jsonify)
 from flask.ext.login import current_user
 from urlparse import urlparse
+from health.healthcheck import HealthCheck
 
 from data import model
 from data.model.oauth import DatabaseAuthorizationProvider
@@ -151,6 +152,20 @@ def v1():
   return index('')
 
 
+@web.route('/health', methods=['GET'])
+@no_cache
+def health():
+  db_healthy = model.check_health()
+  buildlogs_healthy = build_logs.check_health()
+
+  check = HealthCheck.get_check(app.config['HEALTH_CHECKER'][0], app.config['HEALTH_CHECKER'][1])
+  (data, is_healthy) = check.conduct_healthcheck(db_healthy, buildlogs_healthy)
+
+  response = jsonify(dict(data = data, is_healthy = is_healthy))
+  response.status_code = 200 if is_healthy else 503
+  return response
+
+
 @web.route('/status', methods=['GET'])
 @no_cache
 def status():