[Basic] iSCSI client mounting configuration under RHEL6

[Basic] mounting the iSCSI client under RHEL6 I. detection [root @ vhost3 ~] # Iscsiadm-mdiscovery-tsendtargets-pIP: port option and parameter:-mdiscovery: iscsiadmin command using detection method;-tsendtarge... [basic] mounting the iSCSI client under RHEL6 I. detection [root @ vhost3 ~] # Iscsiadm-m discovery-t sendtargets-p IP: port option and parameter:-m discovery: iscsiadmin command using the detection method;-t sendtargets: iscsi protocol, detects the target data of the following devices-p IP: port: The IP address and port of the iscsi device. If no port is written, the default value is 3260. [Root @ vhost3 ~] # Iscsiadm-m discovery-t sendtargets-p 192.168.46.15192.168.46.15: 3260,1 iqn.2004-01.com. storbridge: vdisk2-wt192.168.46.15: 3260,1 iqn.2004-01.com. storbridge: vdisk1-wt in this example, the iSCSI server address is 192.168.46.15, you can see that there are two iSCSI targets under this address. Iqn.2004-01.com. storbridge: the vdisk1-wt is the name of the target. [Root @ vhost3 ~] # Ll-R/var/lib/iscsi/nodes/: total 8drw -------. 3 root 4096 Jul 24 iqn.2004-01.com. storbridge: vdisk1-wtdrw -------. 3 root 4096 Jul 24 iqn.2004-01.com. storbridge: vdisk2-wt View/var/lib/iscsi/nodes/, is the target detected with iscsiadm. 2. connection (Mount) [root @ vhost3 ~] #/Etc/init. d/iscsi restartStopping iscsi: [OK] Starting iscsi: [OK] after detecting the iscsi service, you can connect to the target listed in/var/lib/iscsi/nodes. [Root @ vhost3 ~] # Iscsiadm-m node192.168.46.15: 3260,1 iqn.2004-01.com. storbridge: vdisk1-wt192.168.46.15: 3260,1 iqn.2004-01.com. storbridge: If the vdisk2-wt is not logged on, you need to log on to a target, note that you do not need to restart the iscsi service, just use the login command. [Root @ vhost3 ~] # Iscsiadm-m node-T iqn.2004-01.com. storbridge: vdisk2-wt -- loginLogging in to [iface: default, target: iqn.2004-01.com. storbridge: vdisk2-wt, portal: 192.168.46.15, 3260] (multiple) Login to [iface: default, target: iqn.2004-01.com. storbridge: vdisk2-wt, portal: 192.168.46.15, 3260] successful. the logout command is -- login to -- logout. You can use fdisk-l to view the attached disk. [Root @ vhost3 ~] # Fdisk-l 3. Update, delete, and add Target data [root @ vhost3 ~] # Iscsiadm-m node-T targetname -- logout [root @ vhost3 ~] # Iscsiadm-m node-o [delete | new | update]-T targetname options and parameters: -- logout: logout target, however, data in/var/lib/iscsi/nodes/is not deleted-o delete: delete the following target link information (/var/lib/iscsi/nodes/*)-o update: update related information-o new: add a new target information. [Root @ vhost3 ~] # Iscsiadm-m node check iscsi information IV. disk mounting. create PV [root @ vhost3 home] # [root @ vhost3 home] # pvcreate/dev/sdb <= fdisk-l] # pvscanb. create VG [root @ vhost3 home] # vgcreate iscsi/dev/sdb [root @ vhost3 home] # vgdisplay --- Volume group --- VG Name iscsiSystem IDFormat lvm2Metadata Areas 1 Metadata Sequence No 1VG Access read /writeVG Status resizableMAX LV 0Cur LV 0 Open LV 0Max PV 0Cur PV 1Act PV 1VG Size 500.00 GiBPE Size 4. 00 MiBTotal PE 127999 <= PE number is very important Alloc PE/Size 0/0 Free PE/Size 127999/500 .00 GiBVG UUID e7ZLFr-iVtV-g6Y2-BYEw-yeHv-NzX1-9VeJ2bc. create LV [root @ vhost3 home] # lvcreate-l 127999-n disk iscsi <= 127999 is the number of PES Logical volume "disk" createdd. format [root @ vhost3 home] # mkfs-t ext4/dev/iscsi/disk <= ext4 format e. start [root @ vhost3 home] # mkdir-p/data/iscsi [root @ vhost3 home] # vim/etc/fstab/dev/iscsi/disk/data/ Iscsi ext4 defaults, _ netdev 1 2/* plus _ netdev (bottom line at the top) indicates that, because this partition is on the network, therefore, it is necessary to mount the instance after the network is started. */[Root @ vhost3 home] # mount-a [root @ vhost3 home] # df-h