add the allowed hosts dynamically

.env-example

@@ -3,3 +3,4 @@ POSTGRES_PASSWORD=password
 DJANGO_SETTINGS_MODULE=network_inventory.settings.docker
 DJANGO_DEBUG=False
 DJANGO_SECRET_KEY=foo
+DOMAIN=inventory.example.com

network_inventory/settings/docker.py

@@ -1,6 +1,12 @@
+from socket import gethostname
+from socket import gethostbyname_ex
+
 from .base import *
 
-ALLOWED_HOSTS = ["localhost", "127.0.0.1", "10.7.89.104"]
+
+ALLOWED_HOSTS = [
+    gethostname(),
+] + list(set(gethostbyname_ex(gethostname())[2]))
 
 CSRF_TRUSTED_ORIGINS = [
     "http://localhost:8080",

network_inventory/settings/local.py

@@ -1,8 +1,16 @@
+from socket import gethostname
+from socket import gethostbyname
+from socket import getfqdn
+
 from .base import *
 
+
 ALLOWED_HOSTS = [
     "localhost",
     "127.0.0.1",
+    getfqdn(),
+    gethostname(),
+    gethostbyname(gethostname()),
 ]
 
 CSRF_TRUSTED_ORIGINS = [

network_inventory/settings/production.py

@@ -1,7 +1,17 @@
+from socket import gethostname
+from socket import gethostbyname
+from socket import getfqdn
+
 from .base import *
 
+
 ALLOWED_HOSTS = [
-    "inventory.2li.local",
+    "localhost",
+    "127.0.0.1",
+    getfqdn(),
+    gethostname(),
+    gethostbyname(gethostname()),
+    os.getenv("DOMAIN"),
 ]
 
 # SECURITY WARNING: keep the secret key used in production secret!