def __init__(self, title, probe_id, interval,
libvirt_type, connection_uri):
super(InstanceCpuNodePuller, self).__init__(
title=title,
probe_id=probe_id,
interval=interval,
)
self.libvirt_type = libvirt_type
self.connection_uri = connection_uri
self.uri = self._get_uri()
self.wrapper = InstanceCpuWrapper(
libvirt_type=self.libvirt_type,
libvirt_uri=self.uri,
)
class InstanceCpuNodePuller(MetricPuller):
def __init__(self, title, probe_id, interval,
libvirt_type, connection_uri):
super(InstanceCpuNodePuller, self).__init__(
title=title,
probe_id=probe_id,
interval=interval,
)
self.libvirt_type = libvirt_type
self.connection_uri = connection_uri
self.uri = self._get_uri()
self.wrapper = InstanceCpuWrapper(
libvirt_type=self.libvirt_type,
libvirt_uri=self.uri,
)
def _get_uri(self):
if self.libvirt_type == 'uml':
uri = self.connection_uri or 'uml:///system'
elif self.libvirt_type == 'xen':
uri = self.connection_uri or 'xen:///'
elif self.libvirt_type == 'lxc':
uri = self.connection_uri or 'lxc:///'
elif self.libvirt_type == 'parallels':
uri = self.connection_uri or 'parallels:///system'
else:
uri = self.connection_uri or 'qemu:///system'
return uri
@classmethod
def get_config_opts(cls):
# This could also be extrated from the Nova or Ceilometer configuration
# See --> https://github.com/openstack/nova/blob/stable/liberty
# /nova/virt/libvirt/driver.py#L132
# See --> https://github.com/openstack/ceilometer/blob/stable/liberty
# /ceilometer/compute/virt/libvirt/inspector.py#L32
return cls.get_base_opts() + [
cfg.StrOpt('libvirt_type',
default='kvm',
choices=['kvm', 'lxc', 'qemu', 'uml', 'xen'],
help='Libvirt domain type.'),
cfg.StrOpt('connection_uri',
default='',
help='Override the default libvirt URI '
'(which is dependent on libvirt_type).'),
]
def do_pull(self):
LOG.info("[%s] Pulling measurements...", self.key)
measurements = []
for instance in self.wrapper.get_instances():
value = self.wrapper.instance_cpu_percent(instance)
resource_metadata = {
"host": platform.node(),
"title": self.title,
"display_name": instance.name
}
measurement = Measurement(
name=self.probe_id,
unit=self.unit,
type_="gauge",
value=value,
resource_id=instance.id,
resource_metadata=resource_metadata,
)
LOG.info("[%s] Measurements collected.", self.key)
measurements.append(measurement)
return measurements
@classmethod
def get_name(cls):
return "instance_cpu_used"
@classmethod
def get_default_probe_id(cls):
return "cpu_util"
@classmethod
def get_default_interval(cls):
return 1
@property
def unit(self):
return "%"
