[libvirt] Libvirt iSCSI APIs

[Daniel P. Berrange]

On Wed, Jul 11, 2012 at 05:28:07PM -0700, Ata Bohra wrote:
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> Hi All, 
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> I am interested in extending libvirt APIs to support iSCSI operations such as: add/remove targets, list targets, list remote LUNs, rescan luns etc. The intention is to provide an interface that external programs can hook to manage iSCSI storage devices on a given hypervisor(I would be adding interfaces for ESX first). Looking at the libvirt.c interface for storage driver I'm  unable find routines that can be overridden for specific hypervisor. Googling lead to a nice blog presentation that provisions VMs on remote LUN(s) for KVM but uses virish. (http://berrange.com/tags/iscsi/). 
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> My question is; is this as per design not to expose iSCSI related APIs? Will an extention to libvirt.c (_virStorageDriver) so that every hypervisor can implement it is acceptable? Please correct me if I am missing something serious here. 

The libvirt model is to *not* expose iSCSI specific APIs. We expose a general
purpose storage API, which (for KVM, UML, LXC & Xen) already supports ISCSI
target connections.  This existing API can be implemented for VMWare or
other hypervisors as needed.

Regards,
Daniel
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