def update_volumes(self):
        """Update list of EBS Volumes for the account / region

        Returns:
            `None`
        """
        self.log.debug('Updating EBSVolumes for {}/{}'.format(self.account.account_name, self.region))
        ec2 = self.session.resource('ec2', region_name=self.region)

        try:
            existing_volumes = EBSVolume.get_all(self.account, self.region)
            volumes = {x.id: x for x in ec2.volumes.all()}

            for data in list(volumes.values()):
                if data.id in existing_volumes:
                    vol = existing_volumes[data.id]
                    if vol.update(data):
                        self.log.debug('Changed detected for EBSVolume {}/{}/{}'.format(
                            self.account.account_name,
                            self.region,
                            vol.resource.resource_id
                        ))

                else:
                    properties = {
                        'create_time': data.create_time,
                        'encrypted': data.encrypted,
                        'iops': data.iops or 0,
                        'kms_key_id': data.kms_key_id,
                        'size': data.size,
                        'state': data.state,
                        'snapshot_id': data.snapshot_id,
                        'volume_type': data.volume_type,
                        'attachments': sorted([x['InstanceId'] for x in data.attachments])
                    }
                    tags = {t['Key']: t['Value'] for t in data.tags or {}}
                    vol = EBSVolume.create(
                        data.id,
                        account_id=self.account.account_id,
                        location=self.region,
                        properties=properties,
                        tags=tags
                    )

                    self.log.debug('Added new EBSVolume {}/{}/{}'.format(
                        self.account.account_name,
                        self.region,
                        vol.resource.resource_id
                    ))
            db.session.commit()

            vk = set(list(volumes.keys()))
            evk = set(list(existing_volumes.keys()))
            try:
                for volumeID in evk - vk:
                    db.session.delete(existing_volumes[volumeID].resource)
                    self.log.debug('Deleted EBSVolume {}/{}/{}'.format(
                        volumeID,
                        self.account.account_name,
                        self.region
                    ))

                db.session.commit()
            except:
                self.log.exception('Failed removing deleted volumes')
                db.session.rollback()
        finally:
            del ec2
Update list of EBS Volumes for the account / region

        Returns:
            `None`