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Make sure node hostname is unique

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This commit is contained in:
Roberto Rosario
2012-08-03 06:06:09 -04:00
parent 9ff4ff75ff
commit 239f6467fe
2 changed files with 41 additions and 1 deletions
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40
apps/clustering/migrations/0007_auto__add_unique_node_hostname.py Normal file
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@@ -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']

2
apps/clustering/models.py
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@@ -29,7 +29,7 @@ class NodeManager(models.Manager):
class Node(models.Model):
hostname = models.CharField(max_length=255, verbose_name=_(u'hostname'))
hostname = models.CharField(max_length=255, verbose_name=_(u'hostname'), unique=True)
cpuload = models.FloatField(blank=True, default=DEFAULT_NODE_CPU_LOAD, verbose_name=_(u'cpu load'))
heartbeat = models.DateTimeField(blank=True, default=datetime.datetime.now(), verbose_name=_(u'last heartbeat check'))
memory_usage = models.FloatField(blank=True, default=DEFAULT_NODE_MEMORY_USAGE, verbose_name=_(u'memory usage'))