| 知乎專欄 ｜ 多維度架構 | 微信號 netkiller-ebook | QQ群：128659835 請註明“讀者” |
iSCSI 需要與GFS配合使用，其他檔案系統不能實現數據同步。
過程 12.1. 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
分區設置
fdisk -l fdisk /dev/sdb #依次選p n 1 w mkfs.ext4 /dev/sdb1 掛載 mkdir /iscsi mount /dev/sdb1 /iscsi 設自動掛載 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