django-orchestra/orchestra/apps/resources/backends.py

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import datetime
from django.contrib.contenttypes.models import ContentType
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from orchestra.apps.orchestration import ServiceBackend
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from orchestra.utils.functional import cached
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class ServiceMonitor(ServiceBackend):
TRAFFIC = 'traffic'
DISK = 'disk'
MEMORY = 'memory'
CPU = 'cpu'
actions = ('monitor', 'resource_exceeded', 'resource_recovery')
@classmethod
def get_backends(cls):
""" filter monitor classes """
return [plugin for plugin in cls.plugins if ServiceMonitor in plugin.__mro__]
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@cached
def get_last_date(self, obj):
from .models import MonitorData
try:
# TODO replace
#return MonitorData.objects.filter(content_object=obj).latest().date
ct = ContentType.objects.get(app_label=obj._meta.app_label, model=obj._meta.model_name)
return MonitorData.objects.filter(content_type=ct, object_id=obj.pk).latest().date
except MonitorData.DoesNotExist:
return self.get_current_date() - datetime.timedelta(days=1)
@cached
def get_current_date(self):
return datetime.datetime.now()
def store(self, log):
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""" object_id value """
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from .models import MonitorData
name = self.get_name()
app_label, model_name = self.model.split('.')
ct = ContentType.objects.get(app_label=app_label, model=model_name.lower())
for line in log.stdout.splitlines():
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line = line.strip()
object_id, value = line.split()
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MonitorData.objects.create(monitor=name, object_id=object_id,
content_type=ct, value=value, date=self.get_current_date())
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def execute(self, server):
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log = super(ServiceMonitor, self).execute(server)
self.store(log)
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return log