84 lines
2.8 KiB
Python
84 lines
2.8 KiB
Python
import datetime
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from django.contrib.contenttypes.models import ContentType
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from django.utils import timezone
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from django.utils.functional import cached_property
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from django.utils.translation import ugettext_lazy as _
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from orchestra.contrib.orchestration import ServiceBackend
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class ServiceMonitor(ServiceBackend):
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TRAFFIC = 'traffic'
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DISK = 'disk'
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MEMORY = 'memory'
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CPU = 'cpu'
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# TODO UNITS
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actions = ('monitor', 'exceeded', 'recovery')
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abstract = True
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@classmethod
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def get_plugins(cls):
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""" filter controller classes """
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return [
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plugin for plugin in cls.plugins if issubclass(plugin, ServiceMonitor)
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]
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@classmethod
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def get_verbose_name(cls):
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return _("[M] %s") % super(ServiceMonitor, cls).get_verbose_name()
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@cached_property
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def current_date(self):
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return timezone.now()
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@cached_property
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def content_type(self):
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app_label, model = self.model.split('.')
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model = model.lower()
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return ContentType.objects.get_by_natural_key(app_label, model)
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def get_last_data(self, object_id):
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from .models import MonitorData
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try:
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return MonitorData.objects.filter(content_type=self.content_type,
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monitor=self.get_name(), object_id=object_id).latest()
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except MonitorData.DoesNotExist:
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return None
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def get_last_date(self, object_id):
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data = self.get_last_data(object_id)
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if data is None:
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return self.current_date - datetime.timedelta(days=1)
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return data.created_at
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def process(self, line):
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""" line -> object_id, value """
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return line.split()
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def store(self, log):
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""" stores monitored values from stdout """
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from .models import MonitorData
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name = self.get_name()
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app_label, model_name = self.model.split('.')
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ct = ContentType.objects.get_by_natural_key(app_label, model_name.lower())
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for line in log.stdout.splitlines():
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line = line.strip()
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try:
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object_id, value = self.process(line)
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except ValueError:
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cls_name = self.__class__.__name__
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raise ValueError("%s expected '<id> <value>' got '%s'" % (cls_name, line))
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if isinstance(value, bytes):
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value = value.decode('ascii')
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content_object = ct.get_object_for_this_type(pk=object_id)
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MonitorData.objects.create(
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monitor=name, object_id=object_id, content_type=ct, value=value,
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created_at=self.current_date, content_object_repr=str(content_object),
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)
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def execute(self, *args, **kwargs):
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log = super(ServiceMonitor, self).execute(*args, **kwargs)
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self.store(log)
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return log
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