10–iSCSI Configuration
iSCSI Offload in Linux Environments
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2.
To verify that the iSCSI interfaces were detected properly, issue the
following command. In this example, two iSCSI CNA devices are detected
with SCSI host numbers 4 and 5.
#
dmesg | grep qedi
[0000:00:00.0]:[qedi_init:3696]: QLogic iSCSI Offload Driver v8.15.6.0.
....
[0000:42:00.4]:[__qedi_probe:3563]:59: QLogic FastLinQ iSCSI Module qedi 8.15.6.0, FW 8.15.3.0
....
[0000:42:00.4]:[qedi_link_update:928]:59: Link Up event.
....
[0000:42:00.5]:[__qedi_probe:3563]:60: QLogic FastLinQ iSCSI Module qedi 8.15.6.0, FW 8.15.3.0
....
[0000:42:00.5]:[qedi_link_update:928]:59: Link Up event
3.
Use Open-iSCSI tools to verify that the IP is configured properly. Issue the
following command:
#
iscsiadm -m iface | grep qedi
qedi.00:0e:1e:c4:e1:6d
qedi,00:0e:1e:c4:e1:6d,192.168.101.227,<empty>,iqn.1994-05.com.redhat:534ca9b6adf
qedi.00:0e:1e:c4:e1:6c
qedi,00:0e:1e:c4:e1:6c,192.168.25.91,<empty>,iqn.1994-05.com.redhat:534ca9b6adf
4.
To ensure that the iscsiuio service is running, issue the following command:
#
systemctl status iscsiuio.service
iscsiuio.service - iSCSI UserSpace I/O driver
Loaded: loaded (/usr/lib/systemd/system/iscsiuio.service; disabled; vendor preset: disabled)
Active: active (running) since Fri 2017-01-27 16:33:58 IST; 6 days ago
Docs: man:iscsiuio(8)
Process: 3745 ExecStart=/usr/sbin/iscsiuio (code=exited, status=0/SUCCESS)
Main PID: 3747 (iscsiuio)
CGroup: /system.slice/iscsiuio.service !--3747 /usr/sbin/iscsiuio
Jan 27 16:33:58 localhost.localdomain systemd[1]: Starting iSCSI
UserSpace I/O driver...
Jan 27 16:33:58 localhost.localdomain systemd[1]: Started iSCSI UserSpace I/O driver.
5.
To discover the iSCSI target, issue the
iscsiadm
command:
#
iscsiadm -m discovery -t st -p 192.168.25.100 -I qedi.00:0e:1e:c4:e1:6c
192.168.25.100:3260,1 iqn.2003-
04.com.sanblaze:virtualun.virtualun.target-05000007
192.168.25.100:3260,1 iqn.2003-04.com.sanblaze:virtualun.virtualun.target-05000012
192.168.25.100:3260,1 iqn.2003-04.com.sanblaze:virtualun.virtualun.target-0500000c