def _mark_deleted(self):
"""Mark a record as deleted, returns nothing.
Looks up the model instance by pk, sets the not_deleted attribute
to None and saves the model instance.
Additionally marks any AlertStates referring to this item as inactive.
This is provided as a class method which takes an ID rather than as an
instance method, in order to use ._base_manager rather than .objects -- this
allows us to find the object even if it was already deleted, making this
operation idempotent rather than throwing a DoesNotExist on the second try.
"""
# Not implemented as an instance method because
# we will need to use _base_manager to ensure
# we can get at the object
from django.db.models import signals
signals.pre_delete.send(sender=self.__class__, instance=self)
with transaction.atomic():
if self.not_deleted:
self.not_deleted = None
self.save()
from chroma_core.lib.job import job_log
from chroma_core.models.alert import AlertState
updated = AlertState.filter_by_item_id(self.__class__, self.id).update(active=None)
job_log.info("Lowered %d alerts while deleting %s %s" % (updated, self.__class__, self.id))
signals.post_delete.send(sender=self.__class__, instance=self)
def can_run(cls, host):
if host.immutable_state:
return False
cnt = LustreClientMount.objects.filter(state="mounted",
host=host).count()
return (host.state not in ["removed", "undeployed", "unconfigured"]
and cnt > 0 and not AlertState.filter_by_item(host).filter(
active=True,
alert_type__in=[
HostOfflineAlert.__name__, HostContactAlert.__name__
]).exists())
def can_run(cls, host):
if not host.is_worker:
return False
search = lambda cm: (cm.host == host and cm.state == 'mounted')
mounted = ObjectCache.get(LustreClientMount, search)
return (host.state not in ['removed', 'undeployed', 'unconfigured']
and len(mounted) > 0
and not AlertState.filter_by_item(host).filter(
active=True,
alert_type__in=[
HostOfflineAlert.__name__, HostContactAlert.__name__
]).exists())