nova reize <instance uuid> with NO flavor ID mean it's going to do migration.
so you need to anable both allow_resize_to_same_host and allow_migrate_to_same_host to True in nova.conf
nova reize <instance uuid> with NO flavor ID mean it's going to do migration.
so you need to anable both allow_resize_ to_same_ host and allow_migrate_ to_same_ host to True in nova.conf