Fix #212

api/serializers.py

@@ -381,7 +381,7 @@ class OptionalMachineSerializer(NamespacedHMSerializer):
         model = preferences.OptionalMachine
         fields = ('password_machine', 'max_lambdauser_interfaces',
                   'max_lambdauser_aliases', 'ipv6_mode', 'create_machine',
-                  'ipv6')
+                  'ipv6', 'dns_ttl')
 
 
 class OptionalTopologieSerializer(NamespacedHMSerializer):

preferences/migrations/0063_optionalmachine_dns_ttl.py

@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.23 on 2019-09-20 09:32
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('preferences', '0062_auto_20190910_1909'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='optionalmachine',
+            name='dns_ttl',
+            field=models.IntegerField(default=86400, verbose_name='Time To Live for DNS records'),
+        ),
+    ]

preferences/models.py

@@ -173,6 +173,10 @@ class OptionalMachine(AclMixin, PreferencesModel):
     create_machine = models.BooleanField(
         default=True
     )
+    dns_ttl = models.IntegerField(
+        default=86400,
+        verbose_name=_("Time To Live for DNS records")
+    )
 
     @cached_property
     def ipv6(self):

preferences/templates/preferences/display_preferences.html

@@ -183,6 +183,8 @@ with this program; if not, write to the Free Software Foundation, Inc.,
             <tr>
                 <th>{% trans "Creation of machines" %}</th>
                 <td>{{ machineoptions.create_machine|tick }}</td>
+                <th>{% trans "Time To Live for DNS records" %}</th>
+                <td>{{ machineoptions.dns_ttl }}</td>
             </tr>
         </table>
     </div>