Make sure node hostname is unique

apps/clustering/migrations/0007_auto__add_unique_node_hostname.py

@@ -0,0 +1,40 @@
+# -*- coding: utf-8 -*-
+import datetime
+from south.db import db
+from south.v2 import SchemaMigration
+from django.db import models
+
+
+class Migration(SchemaMigration):
+
+    def forwards(self, orm):
+        # Adding unique constraint on 'Node', fields ['hostname']
+        db.create_unique('clustering_node', ['hostname'])
+
+
+    def backwards(self, orm):
+        # Removing unique constraint on 'Node', fields ['hostname']
+        db.delete_unique('clustering_node', ['hostname'])
+
+
+    models = {
+        'clustering.clusteringconfig': {
+            'Meta': {'object_name': 'ClusteringConfig'},
+            'dead_node_removal_interval': ('django.db.models.fields.PositiveIntegerField', [], {'default': '10'}),
+            'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'lock_id': ('django.db.models.fields.CharField', [], {'default': '1', 'unique': 'True', 'max_length': '1'}),
+            'node_heartbeat_interval': ('django.db.models.fields.PositiveIntegerField', [], {'default': '10'}),
+            'node_heartbeat_timeout': ('django.db.models.fields.PositiveIntegerField', [], {'default': '60'})
+        },
+        'clustering.node': {
+            'Meta': {'object_name': 'Node'},
+            'cpuload': ('django.db.models.fields.FloatField', [], {'default': '0', 'blank': 'True'}),
+            'heartbeat': ('django.db.models.fields.DateTimeField', [], {'default': 'datetime.datetime(2012, 8, 3, 0, 0)', 'blank': 'True'}),
+            'hostname': ('django.db.models.fields.CharField', [], {'unique': 'True', 'max_length': '255'}),
+            'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'memory_usage': ('django.db.models.fields.FloatField', [], {'default': '0', 'blank': 'True'}),
+            'state': ('django.db.models.fields.CharField', [], {'default': "'d'", 'max_length': '4'})
+        }
+    }
+
+    complete_apps = ['clustering']