def inspect_memory_usage(self, instance, duration=None):
instance_name = util.instance_name(instance)
domain = self._get_domain_not_shut_off_or_raise(instance)
try:
memory_stats = domain.memoryStats()
if (memory_stats and
memory_stats.get('available') and
memory_stats.get('unused')):
memory_used = (memory_stats.get('available') -
memory_stats.get('unused'))
# Stat provided from libvirt is in KB, converting it to MB.
memory_used = memory_used / units.Ki
return virt_inspector.MemoryUsageStats(usage=memory_used)
else:
msg = ('Failed to inspect memory usage of instance '
'<name=%(name)s, id=%(id)s>, '
'can not get info from libvirt.') % {
'name': instance_name, 'id': instance.id}
raise virt_inspector.NoDataException(msg)
# memoryStats might launch an exception if the method is not supported
# by the underlying hypervisor being used by libvirt.
except libvirt.libvirtError as e:
msg = ('Failed to inspect memory usage of %(instance_uuid)s, '
'can not get info from libvirt: %(error)s') % {
'instance_uuid': instance.id, 'error': e}
raise virt_inspector.NoDataException(msg)
def inspect_memory_usage(self, instance, duration=None):
instance_name = util.instance_name(instance)
domain = self._get_domain_not_shut_off_or_raise(instance)
try:
memory_stats = domain.memoryStats()
if (memory_stats and memory_stats.get('available')
and memory_stats.get('unused')):
memory_used = (memory_stats.get('available') -
memory_stats.get('unused'))
# Stat provided from libvirt is in KB, converting it to MB.
memory_used = memory_used / units.Ki
return virt_inspector.MemoryUsageStats(usage=memory_used)
else:
msg = ('Failed to inspect memory usage of instance '
'<name=%(name)s, id=%(id)s>, '
'can not get info from libvirt.') % {
'name': instance_name,
'id': instance.id
}
raise virt_inspector.NoDataException(msg)
# memoryStats might launch an exception if the method is not supported
# by the underlying hypervisor being used by libvirt.
except libvirt.libvirtError as e:
msg = ('Failed to inspect memory usage of %(instance_uuid)s, '
'can not get info from libvirt: %(error)s') % {
'instance_uuid': instance.id,
'error': e
}
raise virt_inspector.NoDataException(msg)
def _get_domain_not_shut_off_or_raise(self, instance):
instance_name = util.instance_name(instance)
domain = self._lookup_by_uuid(instance)
state = domain.info()[0]
if state == libvirt.VIR_DOMAIN_SHUTOFF:
msg = ('Failed to inspect data of instance '
'<name=%(name)s, id=%(id)s>, '
'domain state is SHUTOFF.') % {
'name': instance_name, 'id': instance.id}
raise virt_inspector.InstanceShutOffException(msg)
return domain
def _get_domain_not_shut_off_or_raise(self, instance):
instance_name = util.instance_name(instance)
domain = self._lookup_by_uuid(instance)
state = domain.info()[0]
if state == libvirt.VIR_DOMAIN_SHUTOFF:
msg = ('Failed to inspect data of instance '
'<name=%(name)s, id=%(id)s>, '
'domain state is SHUTOFF.') % {
'name': instance_name,
'id': instance.id
}
raise virt_inspector.InstanceShutOffException(msg)
return domain
def _lookup_by_uuid(self, instance):
instance_name = util.instance_name(instance)
try:
return self._get_connection().lookupByUUIDString(instance.id)
except Exception as ex:
if not libvirt or not isinstance(ex, libvirt.libvirtError):
raise virt_inspector.InspectorException(six.text_type(ex))
error_code = ex.get_error_code()
if (error_code == libvirt.VIR_ERR_SYSTEM_ERROR and
ex.get_error_domain() in (libvirt.VIR_FROM_REMOTE,
libvirt.VIR_FROM_RPC)):
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': error_code,
'ex': ex}
raise virt_inspector.InstanceNotFoundException(msg)
def _lookup_by_uuid(self, instance):
instance_name = util.instance_name(instance)
try:
return self._get_connection().lookupByUUIDString(instance.id)
except Exception as ex:
if not libvirt or not isinstance(ex, libvirt.libvirtError):
raise virt_inspector.InspectorException(six.text_type(ex))
error_code = ex.get_error_code()
if (error_code == libvirt.VIR_ERR_SYSTEM_ERROR
and ex.get_error_domain()
in (libvirt.VIR_FROM_REMOTE, libvirt.VIR_FROM_RPC)):
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': error_code,
'ex': ex
}
raise virt_inspector.InstanceNotFoundException(msg)
