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)