RE: [libvirt] Re: [Patch v0.4] iSCSI Multi-IQN (Libvirt Support)
-----Original Message-----
From: Daniel P. Berrange [mailto:berrange@redhat.com]
Sent: Wednesday, November 18, 2009 3:50 PM
To: Iyer, Shyam
Cc: dallan(a)redhat.com; Bellad, Sudhir; libvir-list(a)redhat.com; Domsch,
Matt; KM, Paniraja
Subject: Re: [libvirt] Re: [Patch v0.4] iSCSI Multi-IQN (Libvirt
Support)
On Wed, Nov 18, 2009 at 01:53:50AM +0530, Shyam_Iyer(a)Dell.com wrote:
>
>
> > -----Original Message-----
>
> Iscsiadm's -I parameter takes iface name as the parameter value and
not
> the iqn name.
>
> So I believe this approach could be taken -
>
> 1) Get the iqn for the corresponding iface name using the following
> command
> #iscsiadm -m iface
>
> Example output:
>
> [root@localhost libvirt-0.7.1-15-org]# iscsiadm -m iface
> default tcp,default,default,unknown
> iser iser,default,default,unknown
> bnx2i bnx2i,default,default,unknown
> iface1 tcp,default,default,iqn.1994-05.com.fedora:iqnBellad
> iface3 tcp,default,default,iqn.dell
> iface0 tcp,unknown,unknown,iqn.1994-05.com.fedora:iqnSudhir
Ah, so where does this mapping come from ? Does the administrator have
to
create the mapping between interfaces & iqns, or is this totally
automatic
somehow ?
Today the iface file is created by by iscsi administrators using either
of the following methods
1) By hand by editing the iface parameters in
/var/lib/iscsi/ifaces/<iface_file>
Iface.iscsi_ifacename = <iface name>
Iface.net_ifacename = <default, eth0 etc>
Iface.hwaddress = <default, mac address etc>
Iface.transport_name = <tcp, bnx2i etc>
Iface.initiatorname = <iqn name>
2) By using iscsiadm commands like the following
# iscsiadm -m iface -I <iface_name> -o new
# iscsiadm -m iface -I iface1 --op=update -n iface.initiatorname -v
<iqnname>
We don't change the default initiatorname with libvirt/virt manager
today right ? So, we haven't added any apis to manage the iface file
name using libvirt as such.
But if required by virt-manager(to create a single window of management)
the iface file could be constructed using libvirt apis that call the
iscsiadm commands detailed in method 2)
Does that sound reasonable ?