i want to use san storage i can attach san to controller and use san as lvm or i can attach san to cinder what is the diffrent of this two solution?

we have esx that use san and sysadmin said to me i can not create two lun one for esx and one for kvm and beacause all of my vm uses esxi you should use esxi.but i use kvm what should i do? can one lun connect to openstack and esx simultaneously