How to connect SAN from CentOS through two iSCSI Targets
- by garconcn
I had asked the similar question before. This time I want to use subnet for two iSCSI Targets, hence I start a new question.
I have an old Promise VTrak M500i SAN Server. It comes with 2 iSCSI ports. I want to connect to two LUNs on the SAN server through two separate Targets from CentOS 5.7 64bits server.
My network setup is as follows:
CentOS server:
Management network - 192.168.1.1
Storage network 1 - 192.168.5.2
Storage network 2 - 192.168.6.2
Promise SAN server:
Management network - 192.168.1.2
iSCSI Port 1 - 192.168.5.1
iSCSI Port 2 - 192.168.6.1
I have two Logical Drives on this SAN and they are mapped as follows:
Index Initiator Name LUN Mapping
0 iqn.2011-11:backup (LD0,0)
1 iqn.2011-11:template (LD1,1)
Basically, I want
the traffic to iqn.2011-11:backup LUN 0 through 192.168.5.1 network
the traffic to iqn.2011-11:template LUN 1 through 192.168.6.1 network
I don't use MPIO, just want to separate the traffic to avoid traffic jam. How do I achieve this? I am new to SAN stuff, please explain as much detail as you can. Thank you.
The following are what I am doing now.
After mapping the LUN to my pre-defined Initiators, the CentOS server can discover both Targets.
[root@centos ~]# iscsiadm -m discovery -t sendtargets -p 192.168.5.1
192.168.5.1:3260,1 iscsi-1
192.168.6.1:3260,2 iscsi-1
[root@centos ~]# iscsiadm -m discovery -t sendtargets -p 192.168.6.1
192.168.6.1:3260,2 iscsi-1
192.168.5.1:3260,1 iscsi-1
[root@centos ~]# /etc/init.d/iscsi start
iscsid is stopped
Starting iSCSI daemon: [ OK ]
[ OK ]
Setting up iSCSI targets:
Logging in to [iface: default, target: iscsi-1, portal: 192.168.6.1,3260]
Logging in to [iface: default, target: iscsi-1, portal: 192.168.5.1,3260]
Login to [iface: default, target: iscsi-1, portal: 192.168.6.1,3260] successful.
Login to [iface: default, target: iscsi-1, portal: 192.168.5.1,3260] successful.
[ OK ]
[root@centos ~]# iscsiadm -m session
tcp: [1] 192.168.6.1:3260,2 iscsi-1
tcp: [2] 192.168.5.1:3260,1 iscsi-1
When I check the LUN mapping on the SAN server for the two Logical Drives, both LUNs are connected through Port0-192.168.5.2 with the Initiator defined in CentOS.
Assigned Initiator List:
Initiator Name Alias IP Address LUN
iqn.2011-11.centos centos.mydomain.com Port0-192.168.5.2 0
Initiator Name Alias IP Address LUN
iqn.2011-11.centos centos.mydomain.com Port1-192.168.5.2 1
I assume the following is what I want:
Initiator Name Alias IP Address LUN
iqn.2011-11.backup centos.mydomain.com Port0-192.168.5.2 0
Initiator Name Alias IP Address LUN
iqn.2011-11.template centos.mydomain.com Port0-192.168.6.2 1
