iSCSI 需要与GFS配合使用，其他文件系统不能实现数据同步。
过程 13.1. iSCSI Example
-
install.
# yum install iscsi-initiator-utils -y # rpm -ql iscsi-initiator-utils # rpm -q --scripts iscsi-initiator-utils postinstall scriptlet (using /bin/sh): /sbin/ldconfig if [ ! -f /etc/iscsi/initiatorname.iscsi ]; then echo "InitiatorName=`/sbin/iscsi-iname`" > /etc/iscsi/initiatorname.iscsi fi /sbin/chkconfig --add iscsid /sbin/chkconfig --add iscsi preuninstall scriptlet (using /bin/sh): if [ "$1" = "0" ]; then /sbin/chkconfig --del iscsi /sbin/chkconfig --del iscsid fi postuninstall scriptlet (using /bin/sh): /sbin/ldconfig -
config
# cat /etc/iscsi/initiatorname.iscsi InitiatorName=iqn.1994-05.com.redhat:9b2024102698
-
starting service.
# chkconfig iscsi on # chkconfig iscsid on # service iscsi start iscsid is stopped Starting iSCSI daemon: [ OK ] [ OK ] Setting up iSCSI targets: iscsiadm: No records found! [ OK ] # service iscsi status iscsid (pid 17501) is running... # service iscsid status iscsid (pid 17501) is running... -
discovery targets.
# iscsiadm -m discovery -t sendtargets -p 172.16.0.30:3260 172.16.0.30:3260,1 iqn.2010-09.com.openfiler:tsn.c7a241688f35
or
iscsiadm --mode discovery --type sendtargets --portal 172.16.0.30:3260 iscsiadm -m discovery -t st -p 172.16.0.30:3260
-
login / logout
# iscsiadm -m node --loginall=all Logging in to [iface: default, target: iqn.2010-09.com.openfiler:tsn.c7a241688f35, portal: 172.16.0.30,3260] Login to [iface: default, target: iqn.2010-09.com.openfiler:tsn.c7a241688f35, portal: 172.16.0.30,3260]: successful
or
iscsiadm --mode node --targetname iqn.2010-09.com.openfiler:tsn.c7a241688f35 --portal 192.168.0.10:3260 --login
logout
# iscsiadm -m node --logoutall=all
-
分区设置
fdisk -l fdisk /dev/sdb #依次选p n 1 w mkfs.ext4 /dev/sdb1 挂载 mkdir /iscsi mount /dev/sdb1 /iscsi 设自动挂载 vi /etc/fstab /dev/sdb1 /iscsi ext3 _netdev 0 0
auth
# cp /etc/iscsi/iscsid.conf /etc/iscsi/iscsid.conf.old # vim /etc/iscsi/iscsid.conf
show node
]# iscsiadm -m node 172.16.0.30:3260,1 iqn.2006-01.com.openfiler:tsn.0b232d1cc3ee 172.16.0.30:3260,1 iqn.2010-09.com.openfiler:tsn.c7a241688f35
delete node
iscsiadm -m node -o delete -T iqn.2006-01.com.openfiler:tsn.0b232d1cc3ee
[root@dev2 ~]# /etc/init.d/iscsi start
iscsid is stopped
Starting iSCSI daemon: [ OK ]
[ OK ]
Setting up iSCSI targets: iscsiadm: No records found!
[ OK ]
[root@dev2 ~]# iscsiadm -m discovery -t st -p 192.168.3.194
192.168.3.194:3260,1 iqn.2007-09.jp.ne.peach.istgt:disk0
[root@dev2 ~]# iscsiadm -m node -l
Logging in to [iface: default, target: iqn.2007-09.jp.ne.peach.istgt:disk0, portal: 192.168.3.194,3260]
Login to [iface: default, target: iqn.2007-09.jp.ne.peach.istgt:disk0, portal: 192.168.3.194,3260]: successful
# fdisk -l Disk /dev/sda: 250.0 GB, 250000000000 bytes 255 heads, 63 sectors/track, 30394 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System /dev/sda1 * 1 13 104391 83 Linux /dev/sda2 14 30394 244035382+ 8e Linux LVM Disk /dev/sdb: 499.5 GB, 499558383616 bytes 255 heads, 63 sectors/track, 60734 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk /dev/sdb doesn't contain a valid partition table fdisk /dev/sdb # fdisk -l /dev/sdb Disk /dev/sdb: 499.5 GB, 499558383616 bytes 255 heads, 63 sectors/track, 60734 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System /dev/sdb1 1 60734 487845823+ 5 Extended /dev/sdb5 1 60734 487845792 83 Linux # mkfs.gfs2 -p lock_dlm -t edb_ha:gfs1 -j 3 /dev/sdb5 This will destroy any data on /dev/sdb5. Are you sure you want to proceed? [y/n] y Device: /dev/sdb5 Blocksize: 4096 Device Size 465.25 GB (121961448 blocks) Filesystem Size: 465.25 GB (121961446 blocks) Journals: 3 Resource Groups: 1861 Locking Protocol: "lock_dlm" Lock Table: "edb_ha:gfs1" UUID: A75C4963-85A2-A28B-4099-07FD7E3379D6
原文出处：Netkiller 系列 手札
本文作者：陈景峯
转载请与作者联系，同时请务必标明文章原始出处和作者信息及本声明。
