Set and unset metadata are these calls:
http://developer.openstack.org/api-ref-blockstorage-v2.html#setVolumeimagemetadata
http://developer.openstack.org/api-ref-blockstorage-v2.html#unsetVolumeimagemetadata
Set and unset metadata are these calls:
http:// developer. openstack. org/api- ref-blockstorag e-v2.html# setVolumeimagem etadata
http:// developer. openstack. org/api- ref-blockstorag e-v2.html# unsetVolumeimag emetadata