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Add view for editing global cluster config

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This commit is contained in:
Roberto Rosario
2012-08-01 04:14:31 -04:00
parent b238874ddb
commit 833e149921
10 changed files with 173 additions and 19 deletions
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23
apps/clustering/models.py
View File

@@ -6,15 +6,14 @@ import platform
import psutil
from django.db import models, IntegrityError, transaction
from django.db import close_connection
from django.utils.translation import ugettext_lazy as _
from django.utils.translation import ugettext
from django.core.exceptions import ValidationError
from django.db import models
from django.utils.translation import ugettext, ugettext_lazy as _
from common.models import Singleton
DEFAULT_NODE_TTL = 5
DEFAULT_NODE_HEARTBEAT_INTERVAL = 1
from .literals import (DEFAULT_NODE_HEARTBEAT_INTERVAL, DEFAULT_NODE_HEARTBEAT_TIMEOUT,
DEFAULT_DEAD_NODE_REMOVAL_INTERVAL)
class NodeManager(models.Manager):
@@ -63,7 +62,7 @@ class Node(models.Model):
class ClusteringConfigManager(models.Manager):
def dead_nodes(self):
return Node.objects.filter(heartbeat__lt=datetime.datetime.now() - datetime.timedelta(seconds=self.model.get().node_time_to_live))
return Node.objects.filter(heartbeat__lt=datetime.datetime.now() - datetime.timedelta(seconds=self.model.get().node_heartbeat_timeout))
def delete_dead_nodes(self):
self.dead_nodes().delete()
@@ -76,14 +75,18 @@ class ClusteringConfigManager(models.Manager):
class ClusteringConfig(Singleton):
node_time_to_live = models.PositiveIntegerField(verbose_name=(u'time to live (in seconds)'), default=DEFAULT_NODE_TTL) # After this time a worker is considered dead
node_heartbeat_interval = models.PositiveIntegerField(verbose_name=(u'heartbeat interval'), default=DEFAULT_NODE_HEARTBEAT_INTERVAL)
# TODO: add validation, interval cannot be greater than TTL
node_heartbeat_interval = models.PositiveIntegerField(verbose_name=(u'node heartbeat interval (in seconds)'), help_text=_(u'Interval of time for the node\'s heartbeat update to the cluster.'), default=DEFAULT_NODE_HEARTBEAT_INTERVAL)
node_heartbeat_timeout = models.PositiveIntegerField(verbose_name=(u'node heartbeat timeout (in seconds)'), help_text=_(u'After this amount of time a node without heartbeat updates is considered dead and removed from the cluster node list.'), default=DEFAULT_NODE_HEARTBEAT_TIMEOUT)
dead_node_removal_interval = models.PositiveIntegerField(verbose_name=(u'dead node check and removal interval (in seconds)'), help_text=_(u'Interval of time to check the cluster for unresponsive nodes and remove them from the cluster.'), default=DEFAULT_DEAD_NODE_REMOVAL_INTERVAL)
objects = ClusteringConfigManager()
def __unicode__(self):
return ugettext('clustering config')
def clean(self):
if self.node_heartbeat_interval > self.node_heartbeat_timeout:
raise ValidationError(_(u'Heartbeat interval cannot be greater than heartbeat timeout or else nodes will always be rated as "dead"'))
class Meta:
verbose_name = verbose_name_plural = _(u'clustering config')