shutdown?

Author: marcoacierno

backend/healthchecks/views.py

@@ -1,9 +1,19 @@
+import os
 from django.conf import settings
 from django.http import JsonResponse
 from users.models import User
 
 
 def healthcheck(request):
+    if os.path.exists("shutdown"):
+        return JsonResponse(
+            {
+                "status": "shutdown",
+                "version": settings.GITHASH,
+            },
+            status=503,
+        )
+
     User.objects.exists()
 
     return JsonResponse(

backend/pycon/settings/base.py

@@ -384,7 +384,11 @@
 
 IS_RUNNING_TESTS = False
 
-ECS_NETWORK_CONFIG = json.loads(env("ECS_NETWORK_CONFIG", default="{}"))
+try:
+    ECS_NETWORK_CONFIG = json.loads(env("ECS_NETWORK_CONFIG", default=""))
+except json.decoder.JSONDecodeError:
+    ECS_NETWORK_CONFIG = {}
+
 ECS_SERVICE_ROLE = env("ECS_SERVICE_ROLE", default="")
 
 SNS_WEBHOOK_SECRET = env("SNS_WEBHOOK_SECRET", default="")

backend/pycon/wsgi.py

@@ -1,7 +1,21 @@
+import signal
 import os
 
 from django.core.wsgi import get_wsgi_application
 
 os.environ.setdefault("DJANGO_SETTINGS_MODULE", "pycon.settings.prod")
 
+
+def handle_sigterm(signum, frame):
+    print("PyCon Received SIGTERM")
+    with open("shutdown", "w") as f:
+        f.write("shutdown")
+
+
+try:
+    signal.signal(signal.SIGTERM, handle_sigterm)
+except ValueError:
+    print("Could not set signal handler")
+
+
 application = get_wsgi_application()

infrastructure/applications/cluster/load_balancer_task.tf

@@ -52,7 +52,7 @@ resource "aws_ecs_task_definition" "traefik" {
 
       dockerLabels = {
         "traefik.enable"                        = "true"
-        "traefik.http.middlewares.retry.retry.attempts" = "2"
+        "traefik.http.middlewares.retry.retry.attempts" = "4"
         "traefik.http.middlewares.retry.retry.initialInterval" = "100ms"
       }