vdsm_patch

# cat /etc/vdsm/vdsm.conf 
# Auto-generated by vds_bootstrap at:2013-11-06 16:56:49.310410

[vars]
trust_store_path = /etc/pki/vdsm
ssl=true

[irs]
iscsi_default_ifaces = eth1,eth2    <----- Interfaces to be used for multipath

[addresses]
management_port=54321



vdsm.log:

Thread-41::DEBUG::2013-11-12 13:48:52,390::misc::83::Storage.Misc.excCmd::(<lambda>) '/usr/bin/sudo -n /sbin/iscsiadm -m iface -I eth1 --op=new' (cwd None)
Thread-41::DEBUG::2013-11-12 13:48:52,429::misc::83::Storage.Misc.excCmd::(<lambda>) '/usr/bin/sudo -n /sbin/iscsiadm -m iface -I eth2 --op=new' (cwd None)

- ifaces created ^^^

Thread-41::DEBUG::2013-11-12 13:48:52,403::misc::83::Storage.Misc.excCmd::(<lambda>) '/usr/bin/sudo -n /sbin/iscsiadm -m node -T iqn.2012-07.com.lenovoemc:storage.ix2-73.rhev30 -I eth1 -p 192.168.25.118:3260,1 --op=new' (cwd None)
Thread-41::DEBUG::2013-11-12 13:48:52,442::misc::83::Storage.Misc.excCmd::(<lambda>) '/usr/bin/sudo -n /sbin/iscsiadm -m node -T iqn.2012-07.com.lenovoemc:storage.ix2-73.rhev30 -I eth2 -p 192.168.25.118:3260,1 --op=new' (cwd None)

- nodes created ^^^

Thread-41::DEBUG::2013-11-12 13:48:52,456::misc::83::Storage.Misc.excCmd::(<lambda>) '/usr/bin/sudo -n /sbin/iscsiadm -m iface' (cwd None)
Thread-41::DEBUG::2013-11-12 13:48:52,468::misc::83::Storage.Misc.excCmd::(<lambda>) '/usr/bin/sudo -n /sbin/iscsiadm -m node -T iqn.2012-07.com.lenovoemc:storage.ix2-73.rhev30 -I eth1 -p 192.168.25.118:3260,1 -l' (cwd None)
Thread-41::DEBUG::2013-11-12 13:48:53,138::misc::83::Storage.Misc.excCmd::(<lambda>) '/usr/bin/sudo -n /sbin/iscsiadm -m iface' (cwd None)
Thread-41::DEBUG::2013-11-12 13:48:53,164::misc::83::Storage.Misc.excCmd::(<lambda>) '/usr/bin/sudo -n /sbin/iscsiadm -m node -T iqn.2012-07.com.lenovoemc:storage.ix2-73.rhev30 -I eth2 -p 192.168.25.118:3260,1 -l' (cwd None)
Thread-41::DEBUG::2013-11-12 13:48:53,818::misc::83::Storage.Misc.excCmd::(<lambda>) '/usr/bin/sudo -n /sbin/iscsiadm -m iface' (cwd None)
Thread-41::DEBUG::2013-11-12 13:48:53,856::misc::83::Storage.Misc.excCmd::(<lambda>) '/usr/bin/sudo -n /sbin/iscsiadm -m node -T iqn.2012-07.com.lenovoemc:storage.ix2-73.rhev30 -I eth1 -p 192.168.25.118:3260,1 -n node.startup -v manual --op=update' (cwd None)
Thread-41::DEBUG::2013-11-12 13:48:53,869::misc::83::Storage.Misc.excCmd::(<lambda>) '/usr/bin/sudo -n /sbin/iscsiadm -m iface' (cwd None)
Thread-41::DEBUG::2013-11-12 13:48:53,890::misc::83::Storage.Misc.excCmd::(<lambda>) '/usr/bin/sudo -n /sbin/iscsiadm -m node -T iqn.2012-07.com.lenovoemc:storage.ix2-73.rhev30 -I eth2 -p 192.168.25.118:3260,1 -n node.startup -v manual --op=update' (cwd None)

- login working as expected ^^^



[root@rhevm30 iscsi]# pwd
/var/lib/iscsi

[root@rhevm30 iscsi]# tree
.
|-- ifaces 
|   |-- eth1   <-------
|   `-- eth2   <-------
|-- nodes
|   `-- iqn.2012-07.com.lenovoemc:storage.ix2-73.teste1
|       `-- 192.168.25.118,3260,1
|           |-- eth1
|           `-- eth2
|-- send_targets
`-- static
    |-- iqn.2012-07.com.lenovoemc:storage.ix2-73.teste1,192.168.25.118,3260,1,eth1 -> /var/lib/iscsi/nodes/iqn.2012-07.com.lenovoemc:storage.ix2-73.teste1/192.168.25.118,3260,1   <-------
    `-- iqn.2012-07.com.lenovoemc:storage.ix2-73.teste1,192.168.25.118,3260,1,eth2 -> /var/lib/iscsi/nodes/iqn.2012-07.com.lenovoemc:storage.ix2-73.teste1/192.168.25.118,3260,1   <-------

8 directories, 4 files

[root@rhevm30 iscsi]# multipath -ll
35005907f7a7ab6d0 dm-2 LENOVO,LIFELINE-DISK
size=50G features='0' hwhandler='0' wp=rw
|-+- policy='round-robin 0' prio=1 status=active            <------- Active path
| `- 5:0:0:0 sda 8:0   active ready running
`-+- policy='round-robin 0' prio=1 status=enabled           <------- Fail over path
  `- 6:0:0:0 sdb 8:16  active ready running

hmmm, each hyp should have its own 'iscsi_default_ifaces' entry defining the interfaces which can reach the target ..

@dan, I believe user may not want to login to target using all his nics automatically, rather a list of nics which he prefer to find a path ..

the NICs that can't reach the portal won't be able to login and can be filtered out.