iscsi+udev做RAC共享磁盘
本帖最后由 lsz_qh 于 2012-12-30 22:04 编辑配置ipsan
存储节点：
1、安装scsi-target-utils，并确保/etc/hosts没有问题
2、修改配置文件：cat /etc/tgt/targets.conf
default-driver iscsi
<target iqn.2012-12.shardisk:shardisk>-->iqn.当前时间.hostname倒着写:name
backing-store /dev/sda4-->需要共享的分区或者盘
vendor_id sharedisk-->厂商标识
product_id sharedisk1-->产品编号
initiator-address 192.168.244.4-->能访问存储的节点的ip
initiator-address 192.168.244.5-->能访问存储的节点的ip
</target>3、查看配置信息：# tgt-admin --show
Target 1: iqn.2012-12.shardisk:shardisk
System information:
Driver: iscsi
State: ready
I_T nexus information:
I_T nexus: 1
Initiator: iqn.1994-05.com.redhat:c342f81751d7
Connection: 0
IP Address: 192.168.244.4
LUN information:
LUN: 0
Type: controller
SCSI ID: deadbeaf1:0
SCSI SN: beaf10
Size: 0 MB
Online: Yes
Removable media: No
Backing store: No backing store
LUN: 1
Type: disk
SCSI ID: deadbeaf1:1
SCSI SN: beaf11
Size: 40970 MB
Online: Yes
Removable media: No
Backing store: /dev/sda4
Account information:
ACL information:
192.168.244.4
192.168.244.54、启动服务/etc/init.d/tgtd start，并设置为开机启动chkconfig tgtd on
5、查看tgt服务监听的端口：netstat -tnlpa | grep tgtd-->tgtd监听的端口为3260
使用存储端：（2台使用存储的机器都需要配置）
1、安装iscsi-initiator-utils
2、启动服务service iscsid start
3、发现并使用
iscsiadm -m discovery -t sendtargets -p 192.168.244.3:3260-->存储端ip和端口
iscsiadm -m node -T iqn.2012-12.shardisk:shardisk -l
4、将服务设置为开机启动：
chkconfig iscsid on
chkconfig iscsi on
5、查看磁盘信息：# fdisk -l
Disk /dev/sda: 107.3 GB, 107374182400 bytes
255 heads, 63 sectors/track, 13054 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 25 200781 83 Linux
/dev/sda2 26 5124 40957717+ 83 Linux
/dev/sda3 5125 7680 20531070 82 Linux swap / Solaris
Disk /dev/sdb: 40.9 GB, 40970119680 bytes
64 heads, 32 sectors/track, 39072 cylinders
Units = cylinders of 2048 * 512 = 1048576 bytes
Disk /dev/sdb doesn't contain a valid partition table其中dev/sdb是共享磁盘
为了保证盘符发生变化时共享磁盘还能继续使用，在使用存储端配置udev
1、查看信息：# udevinfo -a -p /sys/block/sdb/
Udevinfo starts with the device specified by the devpath and then
walks up the chain of parent devices. It prints for every device
found, all possible attributes in the udev rules key format.
A rule to match, can be composed by the attributes of the device
and the attributes from one single parent device.
looking at device '/block/sdb':
KERNEL=="sdb"
SUBSYSTEM=="block"
SYSFS{stat}==" 118 1588 1706 105 0 0 0 0 0 88 105"
SYSFS{size}=="80019765"
SYSFS{removable}=="0"
SYSFS{range}=="16"
SYSFS{dev}=="8:16"
looking at parent device '/devices/platform/host2/session2/target2:0:0/2:0:0:1':
ID=="2:0:0:1"
BUS=="scsi"
DRIVER=="sd"
SYSFS{ioerr_cnt}=="0x1"
SYSFS{iodone_cnt}=="0x92"
SYSFS{iorequest_cnt}=="0x92"
SYSFS{iocounterbits}=="32"
SYSFS{timeout}=="60"
SYSFS{state}=="running"
SYSFS{rev}=="0001"
SYSFS{model}=="VIRTUAL-DISK"-->配置udev的时候需要
SYSFS{vendor}=="IET "-->配置udev的时候需要
SYSFS{scsi_level}=="6"
SYSFS{type}=="0"
SYSFS{queue_type}=="none"
SYSFS{queue_depth}=="32"
SYSFS{device_blocked}=="0"
looking at parent device '/devices/platform/host2/session2/target2:0:0':
ID=="target2:0:0"
BUS==""
DRIVER==""
looking at parent device '/devices/platform/host2/session2':
ID=="session2"
BUS==""
DRIVER==""
looking at parent device '/devices/platform/host2':
ID=="host2"
BUS==""
DRIVER==""
looking at parent device '/devices/platform':
ID=="platform"
BUS==""
DRIVER==""
#
2、修改配置文件，配置udev：cd /etc/udev/rules.d
# cat /etc/udev/rules.d/80-scsi-udev.rules(没有的话可以自行创建)
#
# VMware SCSI devices Timeout adjustment
#
# Modify the timeout value for VMware SCSI devices so that
# in the event of a failover, we don't time out.
# See Bug 271286 for more information.
SUBSYSTEM=="block",SYSFS{size}=="40960",SYSFS{vendor}=="IET ",SYSFS{model}=="VIRTUAL-DISK",SYMLINK="iscsi/sharedisk"3、启动udev
start_udev
4、查看信息# ls -ltr /dev/iscsi
总计 0
lrwxrwxrwx 1 root root 6 12-20 17:36 sharedisk -> ../sdb完成以上配置有，/dev/sdb已经共享到2个RAC节点中，使用时可以根据需求划分不同的lv，划分lv时只需在一个RAC节点创建，另一个节点只需要激活即可，即vgchange -ay vgname 支持 下 ~~
页:
[1]