def _lookup_by_uuid(self, instance):
instance_name = util.instance_name(instance)
try:
return self.connection.lookupByUUIDString(instance.id)
except libvirt.libvirtError as ex:
if libvirt_utils.is_disconnection_exception(ex):
raise
msg = _("Error from libvirt while looking up instance "
"<name=%(name)s, id=%(id)s>: "
"[Error Code %(error_code)s] "
"%(ex)s") % {'name': instance_name,
'id': instance.id,
'error_code': ex.get_error_code(),
'ex': ex}
raise virt_inspector.InstanceNotFoundException(msg)
except Exception as ex:
raise virt_inspector.InspectorException(six.text_type(ex))
def _lookup_by_uuid(self, instance):
instance_name = util.instance_name(instance)
try:
return self.connection.lookupByUUIDString(instance.id)
except libvirt.libvirtError as ex:
if libvirt_utils.is_disconnection_exception(ex):
raise
msg = _("Error from libvirt while looking up instance "
"<name=%(name)s, id=%(id)s>: "
"[Error Code %(error_code)s] "
"%(ex)s") % {
'name': instance_name,
'id': instance.id,
'error_code': ex.get_error_code(),
'ex': ex
}
raise virt_inspector.InstanceNotFoundException(msg)
except Exception as ex:
raise virt_inspector.InspectorException(six.text_type(ex))
def discover_libvirt_polling(self, manager, param=None):
instances = []
for domain in self.connection.listAllDomains():
try:
xml_string = domain.metadata(
libvirt.VIR_DOMAIN_METADATA_ELEMENT,
"http://openstack.org/xmlns/libvirt/nova/1.0")
except libvirt.libvirtError as e:
if libvirt_utils.is_disconnection_exception(e):
# Re-raise the exception so it's handled and retries
raise
LOG.error(
"Fail to get domain uuid %s metadata, libvirtError: %s",
domain.UUIDString(), e)
continue
full_xml = etree.fromstring(domain.XMLDesc())
os_type_xml = full_xml.find("./os/type")
metadata_xml = etree.fromstring(xml_string)
# TODO(sileht): We don't have the flavor ID here So the Gnocchi
# resource update will fail for compute sample (or put None ?)
# We currently poll nova to get the flavor ID, but storing the
# flavor_id doesn't have any sense because the flavor description
# can change over the time, we should store the detail of the
# flavor. this is why nova doesn't put the id in the libvirt
# metadata
try:
flavor_xml = metadata_xml.find(
"./flavor")
user_id = metadata_xml.find(
"./owner/user").attrib["uuid"]
project_id = metadata_xml.find(
"./owner/project").attrib["uuid"]
instance_name = metadata_xml.find(
"./name").text
instance_arch = os_type_xml.attrib["arch"]
flavor = {
"id": self.get_flavor_id(flavor_xml.attrib["name"]),
"name": flavor_xml.attrib["name"],
"vcpus": self._safe_find_int(flavor_xml, "vcpus"),
"ram": self._safe_find_int(flavor_xml, "memory"),
"disk": self._safe_find_int(flavor_xml, "disk"),
"ephemeral": self._safe_find_int(flavor_xml, "ephemeral"),
"swap": self._safe_find_int(flavor_xml, "swap"),
}
# The image description is partial, but Gnocchi only care about
# the id, so we are fine
image_xml = metadata_xml.find("./root[@type='image']")
image = ({'id': image_xml.attrib['uuid']}
if image_xml is not None else None)
except AttributeError:
LOG.error(
"Fail to get domain uuid %s metadata: "
"metadata was missing expected attributes",
domain.UUIDString())
continue
dom_state = domain.state()[0]
vm_state = libvirt_utils.LIBVIRT_POWER_STATE.get(dom_state)
status = libvirt_utils.LIBVIRT_STATUS.get(dom_state)
# From:
# https://github.com/openstack/nova/blob/852f40fd0c6e9d8878212ff3120556668023f1c4/nova/api/openstack/compute/views/servers.py#L214-L220
host_id = hashlib.sha224(
(project_id + self.conf.host).encode('utf-8')).hexdigest()
instance_data = {
"id": domain.UUIDString(),
"name": instance_name,
"flavor": flavor,
"image": image,
"os_type": os_type_xml.text,
"architecture": instance_arch,
"OS-EXT-SRV-ATTR:instance_name": domain.name(),
"OS-EXT-SRV-ATTR:host": self.conf.host,
"OS-EXT-STS:vm_state": vm_state,
"tenant_id": project_id,
"user_id": user_id,
"hostId": host_id,
"status": status,
# NOTE(sileht): Other fields that Ceilometer tracks
# where we can't get the value here, but their are
# retrieved by notification
"metadata": {},
# "OS-EXT-STS:task_state"
# 'reservation_id',
# 'OS-EXT-AZ:availability_zone',
# 'kernel_id',
# 'ramdisk_id',
# some image detail
}
LOG.debug("instance data: %s", instance_data)
instances.append(NovaLikeServer(**instance_data))
return instances
