RedHat5.4上iscsi+multipath多路径存储配置
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最近在RedHat上搭建Oracle 11g r2 RAC，其中存储管理是采用iscsi+multipath的方式 ，所以将这部分的管理配置单独拿出来另写一篇，仅供参考。
正文
一：安装iscsi包
安装scsi initiator包。安装包可从安装光盘中找到
[root@rac122 ~]# rpm -qa | grep iscsi
iscsi-initiator-utils-6.2.0.871-0.10.el5
二：启用iscsi设备
新建接口文件，接口文件保存在/var/lib/iscsi/ifaces目录下：
[root@rac122 ~]# ls /var/lib/iscsi/ifaces
bnx2i.00:00:00:00:00:00
[root@rac122 ~]# iscsiadm -m iface -I eth0 -o new
New interface eth0 added
[root@rac122 ~]# ls /var/lib/iscsi/ifaces
bnx2i.00:00:00:00:00:00 eth0
[root@rac122 ~]# cat /var/lib/iscsi/ifaces/eth0
# BEGIN RECORD 2.0-871
iface.iscsi_ifacename = eth0
iface.transport_name = tcp
# END RECORD
[root@rac122 ~]# iscsiadm -m iface -I eth0 --op=update -n iface.net_ifacename -v eth0
eth0 updated.
[root@rac122 ~]# cat /var/lib/iscsi/ifaces/eth0
# BEGIN RECORD 2.0-871
iface.iscsi_ifacename = eth0
iface.net_ifacename = eth0
iface.transport_name = tcp
# END RECORD
建完接口文件重启iscsi服务
[root@rac122 ~]# service iscsi restart
Stopping iSCSI daemon:
iscsid dead but pid file exists
[ OK ]off network shutdown. Starting iSCSI daemon: [ OK ]
[ OK ]
Setting up iSCSI targets: iscsiadm: No records found!
[ OK ]
根据提供的IP收索iscsi target
[root@rac122 ~]# iscsiadm -m discovery -t st -p 10.1.252.148:3260
10.1.252.148:3260,1 iqn.2001-05.com.equallogic:0-8a0906-dcced9007-10d000000c74cc10-vol-rac7
10.1.252.148:3260,1 iqn.2001-05.com.equallogic:0-8a0906-495ed9007-b68000000ca4cc4d-vol-rac8
10.1.252.148:3260,1 iqn.2001-05.com.equallogic:0-8a0906-fdded9007-b80000000c44cb23-vol-rac6
10.1.252.148:3260,1 iqn.2001-05.com.equallogic:0-8a0906-fc7ed9007-6b1000000c14cb23-vol-rac5
10.1.252.148:3260,1 iqn.2001-05.com.equallogic:0-8a0906-668ed9007-1ca000000a34ca57-vol-rac2
10.1.252.148:3260,1 iqn.2001-05.com.equallogic:0-8a0906-631ed9007-a93000000a04ca57-vol-rac1
10.1.252.148:3260,1 iqn.2001-05.com.equallogic:0-8a0906-697ed9007-251000000a64ca57-vol-rac3
10.1.252.148:3260,1 iqn.2001-05.com.equallogic:0-8a0906-6b1ed9007-b7c000000a94ca57-vol-rac4
与搜素到的target建立连接
[root@rac122 ~]# iscsiadm -m node -l
Logging in to [iface: eth0, target: iqn.2001-05.com.equallogic:0-8a0906-dcced9007-10d000000c74cc10-vol-rac7, portal: 10.1.252.148,3260]
Logging in to [iface: eth0, target: iqn.2001-05.com.equallogic:0-8a0906-495ed9007-b68000000ca4cc4d-vol-rac8, portal: 10.1.252.148,3260]
Logging in to [iface: eth0, target: iqn.2001-05.com.equallogic:0-8a0906-fdded9007-b80000000c44cb23-vol-rac6, portal: 10.1.252.148,3260]
Logging in to [iface: eth0, target: iqn.2001-05.com.equallogic:0-8a0906-fc7ed9007-6b1000000c14cb23-vol-rac5, portal: 10.1.252.148,3260]
Logging in to [iface: eth0, target: iqn.2001-05.com.equallogic:0-8a0906-668ed9007-1ca000000a34ca57-vol-rac2, portal: 10.1.252.148,3260]
Logging in to [iface: eth0, target: iqn.2001-05.com.equallogic:0-8a0906-631ed9007-a93000000a04ca57-vol-rac1, portal: 10.1.252.148,3260]
Logging in to [iface: eth0, target: iqn.2001-05.com.equallogic:0-8a0906-697ed9007-251000000a64ca57-vol-rac3, portal: 10.1.252.148,3260]
Logging in to [iface: eth0, target: iqn.2001-05.com.equallogic:0-8a0906-6b1ed9007-b7c000000a94ca57-vol-rac4, portal: 10.1.252.148,3260]
Login to [iface: eth0, target: iqn.2001-05.com.equallogic:0-8a0906-dcced9007-10d000000c74cc10-vol-rac7, portal: 10.1.252.148,3260]: successful
Login to [iface: eth0, target: iqn.2001-05.com.equallogic:0-8a0906-495ed9007-b68000000ca4cc4d-vol-rac8, portal: 10.1.252.148,3260]: successful
Login to [iface: eth0, target: iqn.2001-05.com.equallogic:0-8a0906-fdded9007-b80000000c44cb23-vol-rac6, portal: 10.1.252.148,3260]: successful
Login to [iface: eth0, target: iqn.2001-05.com.equallogic:0-8a0906-fc7ed9007-6b1000000c14cb23-vol-rac5, portal: 10.1.252.148,3260]: successful
Login to [iface: eth0, target: iqn.2001-05.com.equallogic:0-8a0906-668ed9007-1ca000000a34ca57-vol-rac2, portal: 10.1.252.148,3260]: successful
Login to [iface: eth0, target: iqn.2001-05.com.equallogic:0-8a0906-631ed9007-a93000000a04ca57-vol-rac1, portal: 10.1.252.148,3260]: successful
Login to [iface: eth0, target: iqn.2001-05.com.equallogic:0-8a0906-697ed9007-251000000a64ca57-vol-rac3, portal: 10.1.252.148,3260]: successful
Login to [iface: eth0, target: iqn.2001-05.com.equallogic:0-8a0906-6b1ed9007-b7c000000a94ca57-vol-rac4, portal: 10.1.252.148,3260]: successful
[root@rac122 ~]# iscsiadm -m session
tcp: [1] 10.1.252.148:3260,1 iqn.2001-05.com.equallogic:0-8a0906-dcced9007-10d000000c74cc10-vol-rac7
tcp: [2] 10.1.252.148:3260,1 iqn.2001-05.com.equallogic:0-8a0906-495ed9007-b68000000ca4cc4d-vol-rac8
tcp: [3] 10.1.252.148:3260,1 iqn.2001-05.com.equallogic:0-8a0906-fdded9007-b80000000c44cb23-vol-rac6
tcp: [4] 10.1.252.148:3260,1 iqn.2001-05.com.equallogic:0-8a0906-fc7ed9007-6b1000000c14cb23-vol-rac5
tcp: [5] 10.1.252.148:3260,1 iqn.2001-05.com.equallogic:0-8a0906-668ed9007-1ca000000a34ca57-vol-rac2
tcp: [6] 10.1.252.148:3260,1 iqn.2001-05.com.equallogic:0-8a0906-631ed9007-a93000000a04ca57-vol-rac1
tcp: [7] 10.1.252.148:3260,1 iqn.2001-05.com.equallogic:0-8a0906-697ed9007-251000000a64ca57-vol-rac3
tcp: [8] 10.1.252.148:3260,1 iqn.2001-05.com.equallogic:0-8a0906-6b1ed9007-b7c000000a94ca57-vol-rac4
[root@rac122 ~]# iscsiadm -m session -P3
iSCSI Transport Class version 2.0-871
version 2.0-871
Target: iqn.2001-05.com.equallogic:0-8a0906-dcced9007-10d000000c74cc10-vol-rac7
Current Portal: 10.1.252.149:3260,1
Persistent Portal: 10.1.252.148:3260,1
**********
Interface:
**********
Iface Name: eth0
Iface Transport: tcp
Iface Initiatorname: iqn.1994-05.com.redhat:b9e5bb909ae1
Iface IPaddress: 10.1.252.122
Iface HWaddress: <empty>
Iface Netdev: eth0
SID: 1
iSCSI Connection State: LOGGED IN
iSCSI Session State: LOGGED_IN
Internal iscsid Session State: NO CHANGE
************************
Negotiated iSCSI params:
************************
HeaderDigest: None
DataDigest: None
MaxRecvDataSegmentLength: 262144
MaxXmitDataSegmentLength: 65536
FirstBurstLength: 65536
MaxBurstLength: 262144
ImmediateData: Yes
InitialR2T: No
MaxOutstandingR2T: 1
************************
Attached SCSI devices:
************************
Host Number: 20 State: running
scsi20 Channel 00 Id 0 Lun: 0
Attached scsi disk sdk State: running
Target: iqn.2001-05.com.equallogic:0-8a0906-495ed9007-b68000000ca4cc4d-vol-rac8
Current Portal: 10.1.252.150:3260,1
Persistent Portal: 10.1.252.148:3260,1
**********
Interface:
**********
Iface Name: eth0
Iface Transport: tcp
Iface Initiatorname: iqn.1994-05.com.redhat:b9e5bb909ae1
Iface IPaddress: 10.1.252.122
Iface HWaddress: <empty>
Iface Netdev: eth0
SID: 2
iSCSI Connection State: LOGGED IN
iSCSI Session State: LOGGED_IN
Internal iscsid Session State: NO CHANGE
************************
Negotiated iSCSI params:
************************
HeaderDigest: None
DataDigest: None
MaxRecvDataSegmentLength: 262144
MaxXmitDataSegmentLength: 65536
FirstBurstLength: 65536
MaxBurstLength: 262144
ImmediateData: Yes
InitialR2T: No
MaxOutstandingR2T: 1
************************
Attached SCSI devices:
************************
Host Number: 21 State: running
scsi21 Channel 00 Id 0 Lun: 0
Attached scsi disk sdd State: running
Target: iqn.2001-05.com.equallogic:0-8a0906-fdded9007-b80000000c44cb23-vol-rac6
Current Portal: 10.1.252.149:3260,1
Persistent Portal: 10.1.252.148:3260,1
**********
Interface:
**********
Iface Name: eth0
Iface Transport: tcp
Iface Initiatorname: iqn.1994-05.com.redhat:b9e5bb909ae1
Iface IPaddress: 10.1.252.122
Iface HWaddress: <empty>
Iface Netdev: eth0
SID: 3
iSCSI Connection State: LOGGED IN
iSCSI Session State: LOGGED_IN
Internal iscsid Session State: NO CHANGE
************************
Negotiated iSCSI params:
************************
HeaderDigest: None
DataDigest: None
MaxRecvDataSegmentLength: 262144
MaxXmitDataSegmentLength: 65536
FirstBurstLength: 65536
MaxBurstLength: 262144
ImmediateData: Yes
InitialR2T: No
MaxOutstandingR2T: 1
************************
Attached SCSI devices:
************************
Host Number: 22 State: running
scsi22 Channel 00 Id 0 Lun: 0
Attached scsi disk sde State: running
Target: iqn.2001-05.com.equallogic:0-8a0906-fc7ed9007-6b1000000c14cb23-vol-rac5
Current Portal: 10.1.252.150:3260,1
Persistent Portal: 10.1.252.148:3260,1
**********
Interface:
**********
Iface Name: eth0
Iface Transport: tcp
Iface Initiatorname: iqn.1994-05.com.redhat:b9e5bb909ae1
Iface IPaddress: 10.1.252.122
Iface HWaddress: <empty>
Iface Netdev: eth0
SID: 4
iSCSI Connection State: LOGGED IN
iSCSI Session State: LOGGED_IN
Internal iscsid Session State: NO CHANGE
************************
Negotiated iSCSI params:
************************
HeaderDigest: None
DataDigest: None
MaxRecvDataSegmentLength: 262144
MaxXmitDataSegmentLength: 65536
FirstBurstLength: 65536
MaxBurstLength: 262144
ImmediateData: Yes
InitialR2T: No
MaxOutstandingR2T: 1
************************
Attached SCSI devices:
************************
Host Number: 23 State: running
scsi23 Channel 00 Id 0 Lun: 0
Attached scsi disk sdf State: running
Target: iqn.2001-05.com.equallogic:0-8a0906-668ed9007-1ca000000a34ca57-vol-rac2
Current Portal: 10.1.252.149:3260,1
Persistent Portal: 10.1.252.148:3260,1
**********
Interface:
**********
Iface Name: eth0
Iface Transport: tcp
Iface Initiatorname: iqn.1994-05.com.redhat:b9e5bb909ae1
Iface IPaddress: 10.1.252.122
Iface HWaddress: <empty>
Iface Netdev: eth0
SID: 5
iSCSI Connection State: LOGGED IN
iSCSI Session State: LOGGED_IN
Internal iscsid Session State: NO CHANGE
************************
Negotiated iSCSI params:
************************
HeaderDigest: None
DataDigest: None
MaxRecvDataSegmentLength: 262144
MaxXmitDataSegmentLength: 65536
FirstBurstLength: 65536
MaxBurstLength: 262144
ImmediateData: Yes
InitialR2T: No
MaxOutstandingR2T: 1
************************
Attached SCSI devices:
************************
Host Number: 24 State: running
scsi24 Channel 00 Id 0 Lun: 0
Attached scsi disk sdh State: running
Target: iqn.2001-05.com.equallogic:0-8a0906-631ed9007-a93000000a04ca57-vol-rac1
Current Portal: 10.1.252.149:3260,1
Persistent Portal: 10.1.252.148:3260,1
**********
Interface:
**********
Iface Name: eth0
Iface Transport: tcp
Iface Initiatorname: iqn.1994-05.com.redhat:b9e5bb909ae1
Iface IPaddress: 10.1.252.122
Iface HWaddress: <empty>
Iface Netdev: eth0
SID: 6
iSCSI Connection State: LOGGED IN
iSCSI Session State: LOGGED_IN
Internal iscsid Session State: NO CHANGE
************************
Negotiated iSCSI params:
************************
HeaderDigest: None
DataDigest: None
MaxRecvDataSegmentLength: 262144
MaxXmitDataSegmentLength: 65536
FirstBurstLength: 65536
MaxBurstLength: 262144
ImmediateData: Yes
InitialR2T: No
MaxOutstandingR2T: 1
************************
Attached SCSI devices:
************************
Host Number: 25 State: running
scsi25 Channel 00 Id 0 Lun: 0
Attached scsi disk sdg State: running
Target: iqn.2001-05.com.equallogic:0-8a0906-697ed9007-251000000a64ca57-vol-rac3
Current Portal: 10.1.252.150:3260,1
Persistent Portal: 10.1.252.148:3260,1
**********
Interface:
**********
Iface Name: eth0
Iface Transport: tcp
Iface Initiatorname: iqn.1994-05.com.redhat:b9e5bb909ae1
Iface IPaddress: 10.1.252.122
Iface HWaddress: <empty>
Iface Netdev: eth0
SID: 7
iSCSI Connection State: LOGGED IN
iSCSI Session State: LOGGED_IN
Internal iscsid Session State: NO CHANGE
************************
Negotiated iSCSI params:
************************
HeaderDigest: None
DataDigest: None
MaxRecvDataSegmentLength: 262144
MaxXmitDataSegmentLength: 65536
FirstBurstLength: 65536
MaxBurstLength: 262144
ImmediateData: Yes
InitialR2T: No
MaxOutstandingR2T: 1
************************
Attached SCSI devices:
************************
Host Number: 26 State: running
scsi26 Channel 00 Id 0 Lun: 0
Attached scsi disk sdi State: running
Target: iqn.2001-05.com.equallogic:0-8a0906-6b1ed9007-b7c000000a94ca57-vol-rac4
Current Portal: 10.1.252.150:3260,1
Persistent Portal: 10.1.252.148:3260,1
**********
Interface:
**********
Iface Name: eth0
Iface Transport: tcp
Iface Initiatorname: iqn.1994-05.com.redhat:b9e5bb909ae1
Iface IPaddress: 10.1.252.122
Iface HWaddress: <empty>
Iface Netdev: eth0
SID: 8
iSCSI Connection State: LOGGED IN
iSCSI Session State: LOGGED_IN
Internal iscsid Session State: NO CHANGE
************************
Negotiated iSCSI params:
************************
HeaderDigest: None
DataDigest: None
MaxRecvDataSegmentLength: 262144
MaxXmitDataSegmentLength: 65536
FirstBurstLength: 65536
MaxBurstLength: 262144
ImmediateData: Yes
InitialR2T: No
MaxOutstandingR2T: 1
************************
Attached SCSI devices:
************************
Host Number: 27 State: running
scsi27 Channel 00 Id 0 Lun: 0
Attached scsi disk sdj State: running
查看连接状态
[root@rac122 ~]# netstat -anp | grep 3260
tcp 0 0 10.1.252.122:48858 10.1.252.150:3260 ESTABLISHED 19427/iscsid
tcp 0 0 10.1.252.122:48856 10.1.252.150:3260 ESTABLISHED 19427/iscsid
tcp 0 0 10.1.252.122:48862 10.1.252.150:3260 ESTABLISHED 19427/iscsid
tcp 0 0 10.1.252.122:48861 10.1.252.150:3260 ESTABLISHED 19427/iscsid
tcp 0 0 10.1.252.122:63216 10.1.252.149:3260 ESTABLISHED 19427/iscsid
tcp 0 0 10.1.252.122:63218 10.1.252.149:3260 ESTABLISHED 19427/iscsid
tcp 0 0 10.1.252.122:63221 10.1.252.149:3260 ESTABLISHED 19427/iscsid
tcp 0 0 10.1.252.122:63220 10.1.252.149:3260 ESTABLISHED 19427/iscsid
[root@rac122 ~]# iscsiadm -m node
10.1.252.148:3260,1 iqn.2001-05.com.equallogic:0-8a0906-dcced9007-10d000000c74cc10-vol-rac7
10.1.252.148:3260,1 iqn.2001-05.com.equallogic:0-8a0906-495ed9007-b68000000ca4cc4d-vol-rac8
10.1.252.148:3260,1 iqn.2001-05.com.equallogic:0-8a0906-fdded9007-b80000000c44cb23-vol-rac6
10.1.252.148:3260,1 iqn.2001-05.com.equallogic:0-8a0906-fc7ed9007-6b1000000c14cb23-vol-rac5
10.1.252.148:3260,1 iqn.2001-05.com.equallogic:0-8a0906-668ed9007-1ca000000a34ca57-vol-rac2
10.1.252.148:3260,1 iqn.2001-05.com.equallogic:0-8a0906-631ed9007-a93000000a04ca57-vol-rac1
10.1.252.148:3260,1 iqn.2001-05.com.equallogic:0-8a0906-697ed9007-251000000a64ca57-vol-rac3
10.1.252.148:3260,1 iqn.2001-05.com.equallogic:0-8a0906-6b1ed9007-b7c000000a94ca57-vol-rac
三：安装Mutipath包
安装scsi initiator包。安装包可从安装光盘中找到
[root@rac122 ~]# rpm -qa | grep device-mapper
device-mapper-multipath-0.4.7-30.el5
device-mapper-1.02.32-1.el5
device-mapper-1.02.32-1.el5
device-mapper-event-1.02.32-1.el5
四：配置Multipath参数
4.1、定位配置文件并备份再作修改
Multipath的参数配置文件是：/etc/multipath.conf ,刚安装完Multipath包该文件里面的绝大多数内容都是注释的。将该文件复制一份留作备用，
然后再修改另一份文件。
[root@rac122 ~]# cp /etc/multipath.conf /etc/multipath.conf.back
[root@rac122 ~]# ls /etc/ | grep multipath
multipath.conf
multipath.conf.bak
4.2、黑名单过滤
Multipath默认会把所有设置都加入到黑名(Blacklist)单中，也就是禁止使用所有设备，所以取消默认设置，将文件对应blacklist块的内容更新为如下：
#Blacklist all devices by default. Remove this to enable multipathing
# on the default devices.
blacklist {
devnode "^sd[a]$"
}
4.3、获取wwwid,
在修改配置文件中的multipath {
wwid 36090a07800d98e6657ca340a0000a01c
alias vol-aidev01
path_grouping_policy multibus
path_checker readsector0
path_selector "round-robin 0"
failback manual
rr_weight priorities
no_path_retry 5
}块时，会用到wwwid，所以要先将各设备的wwwid,
查看刚才启用了哪些iscsi设备
[root@rac122 userfile]# fdisk -l
Disk /dev/sda: 299.4 GB, 299439751168 bytes
255 heads, 63 sectors/track, 36404 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 36404 292310707+ 8e Linux LVM
Disk /dev/sdd: 536.8 GB, 536881397760 bytes
255 heads, 63 sectors/track, 65272 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
Disk /dev/sde: 17.1 GB, 17191403520 bytes
64 heads, 32 sectors/track, 16395 cylinders
Units = cylinders of 2048 * 512 = 1048576 bytes
Device Boot Start End Blocks Id System
Disk /dev/sdf: 17.1 GB, 17191403520 bytes
64 heads, 32 sectors/track, 16395 cylinders
Units = cylinders of 2048 * 512 = 1048576 bytes
Device Boot Start End Blocks Id System
Disk /dev/sdg: 8603 MB, 8603566080 bytes
64 heads, 32 sectors/track, 8205 cylinders
Units = cylinders of 2048 * 512 = 1048576 bytes
Device Boot Start End Blocks Id System
Disk /dev/sdh: 8603 MB, 8603566080 bytes
64 heads, 32 sectors/track, 8205 cylinders
Units = cylinders of 2048 * 512 = 1048576 bytes
Disk /dev/sdh doesn't contain a valid partition table
Disk /dev/sdi: 8603 MB, 8603566080 bytes
64 heads, 32 sectors/track, 8205 cylinders
Units = cylinders of 2048 * 512 = 1048576 bytes
Device Boot Start End Blocks Id System
Disk /dev/sdj: 8603 MB, 8603566080 bytes
64 heads, 32 sectors/track, 8205 cylinders
Units = cylinders of 2048 * 512 = 1048576 bytes
Device Boot Start End Blocks Id System
Disk /dev/sdk: 107.3 GB, 107379425280 bytes
255 heads, 63 sectors/track, 13054 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
可以看到启用了sdd、sde、sdf、sdg、sdh、sdi、sdj、sdk八个iscsi备
分别获取这八个设备的wwwid
root@rac122 userfile]# /sbin/scsi_id -g -u -s /block/sdd
36090a07800d95e494dcca40c000080b6
[root@rac122 userfile]# /sbin/scsi_id -g -u -s /block/sde
36090a07800d9defd23cb440c000000b8
[root@rac122 userfile]# /sbin/scsi_id -g -u -s /block/sdf
36090a07800d97efc23cb140c0000106b
[root@rac122 userfile]# /sbin/scsi_id -g -u -s /block/sdg
36090a07800d91e6357ca040a000030a9
[root@rac122 userfile]# /sbin/scsi_id -g -u -s /block/sdh
36090a07800d98e6657ca340a0000a01c
[root@rac122 userfile]# /sbin/scsi_id -g -u -s /block/sdi
36090a07800d97e6957ca640a00001025
[root@rac122 userfile]# /sbin/scsi_id -g -u -s /block/sdj
36090a07800d91e6b57ca940a0000c0b7
[root@rac122 userfile]# /sbin/scsi_id -g -u -s /block/sdk
36090a07800d9cedc10cc740c0000d010
在获取好各设备的wwwid后，在配置文件/etc/multipath.conf中添加如下内容
multipaths {
multipath {
wwid 36090a07800d98e6657ca340a0000a01c
alias vol-aidev01
path_grouping_policy multibus
path_checker readsector0
path_selector "round-robin 0"
failback manual
rr_weight priorities
no_path_retry 5
}
multipath {
wwid 36090a07800d97efc23cb140c0000106b
alias vol-aidev02
path_grouping_policy multibus
path_checker readsector0
path_selector "round-robin 0"
failback manual
rr_weight priorities
no_path_retry 5
}
multipath {
wwid 36090a07800d91e6b57ca940a0000c0b7
alias vol-aidev03
path_grouping_policy multibus
path_checker readsector0
path_selector "round-robin 0"
failback manual
rr_weight priorities
no_path_retry 5
}
multipath {
wwid 36090a07800d91e6357ca040a000030a9
alias vol-aidev04
path_grouping_policy multibus
path_checker readsector0
path_selector "round-robin 0"
failback manual
rr_weight priorities
no_path_retry 5
}
multipath {
wwid 36090a07800d95e494dcca40c000080b6
alias vol-aidev05
path_grouping_policy multibus
path_checker readsector0
path_selector "round-robin 0"
failback manual
rr_weight priorities
no_path_retry 5
}
multipath {
wwid 36090a07800d9defd23cb440c000000b8
alias vol-aidev06
path_grouping_policy multibus
path_checker readsector0
path_selector "round-robin 0"
failback manual
rr_weight priorities
no_path_retry 5
}
multipath {
wwid 36090a07800d9cedc10cc740c0000d010
alias vol-aidev07
path_grouping_policy multibus
path_checker readsector0
path_selector "round-robin 0"
failback manual
rr_weight priorities
no_path_retry 5
}
multipath {
wwid 36090a07800d97e6957ca640a00001025
alias vol-aidev08
path_grouping_policy multibus
path_checker readsector0
path_selector "round-robin 0"
failback manual
rr_weight priorities
no_path_retry 5
}
}
devices {
device {
vendor "COMPAQ "
product "HSV110 (C)COMPAQ"
path_grouping_policy multibus
getuid_callout "/sbin/scsi_id -g -u -s /block/%n"
path_checker readsector0
path_selector "round-robin 0"
hardware_handler "0"
failback 15
rr_weight priorities
no_path_retry queue
}
}
五、重启Multipath服务，验证配置
重启服务
[root@rac122 userfile]# service multipathd restart
Stopping multipathd daemon: [ OK ]
Starting multipathd daemon: [ OK ]
显示映射
[root@rac122 userfile]# ls -lrt /dev/mapper/*
crw------- 1 root root 10, 63 May 28 10:32 /dev/mapper/control
brw------- 1 root root 253, 6 May 28 10:32 /dev/mapper/VG00-LV_SP01
brw------- 1 root root 253, 0 May 28 10:32 /dev/mapper/VG00-LV01
brw------- 1 root root 253, 1 May 28 10:32 /dev/mapper/VG00-LV_DATA01
brw------- 1 root root 253, 2 May 28 10:32 /dev/mapper/VG00-LV_TMP01
brw------- 1 root root 253, 3 May 28 10:32 /dev/mapper/VG00-LV_ORADATA01
brw------- 1 root root 253, 4 May 28 10:32 /dev/mapper/VG00-LV_VAR01
brw------- 1 root root 253, 5 May 28 10:32 /dev/mapper/VG00-LV_SW01
brw-rw---- 1 root disk 253, 12 Jun 6 22:08 /dev/mapper/vol-aidev08
brw-rw---- 1 root disk 253, 8 Jun 6 22:08 /dev/mapper/vol-aidev06
brw-rw---- 1 root disk 253, 7 Jun 6 22:08 /dev/mapper/vol-aidev05
brw-rw---- 1 root disk 253, 10 Jun 6 22:08 /dev/mapper/vol-aidev04
brw-rw---- 1 root disk 253, 9 Jun 6 22:08 /dev/mapper/vol-aidev02
brw-rw---- 1 root disk 253, 11 Jun 6 22:08 /dev/mapper/vol-aidev01
brw-rw---- 1 root disk 253, 14 Jun 6 22:08 /dev/mapper/vol-aidev07
brw-rw---- 1 root disk 253, 13 Jun 6 22:08 /dev/mapper/vol-aidev03
multipath命令能够查看到活跃的路径
[root@rac122 userfile]# multipath -ll
vol-aidev08 (36090a07800d97e6957ca640a00001025) dm-12 EQLOGIC,100E-00
[size=8.0G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=1][active]
\_ 26:0:0:0 sdi 8:128 [active][ready]
vol-aidev07 (36090a07800d9cedc10cc740c0000d010) dm-14 EQLOGIC,100E-00
[size=100G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=1][active]
\_ 20:0:0:0 sdk 8:160 [active][ready]
vol-aidev06 (36090a07800d9defd23cb440c000000b8) dm-8 EQLOGIC,100E-00
[size=16G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=1][active]
\_ 22:0:0:0 sde 8:64 [active][ready]
vol-aidev05 (36090a07800d95e494dcca40c000080b6) dm-7 EQLOGIC,100E-00
[size=500G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=1][active]
\_ 21:0:0:0 sdd 8:48 [active][ready]
vol-aidev04 (36090a07800d91e6357ca040a000030a9) dm-10 EQLOGIC,100E-00
[size=8.0G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=1][active]
\_ 25:0:0:0 sdg 8:96 [active][ready]
vol-aidev03 (36090a07800d91e6b57ca940a0000c0b7) dm-13 EQLOGIC,100E-00
[size=8.0G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=1][active]
\_ 27:0:0:0 sdj 8:144 [active][ready]
vol-aidev02 (36090a07800d97efc23cb140c0000106b) dm-9 EQLOGIC,100E-00
[size=16G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=1][active]
\_ 23:0:0:0 sdf 8:80 [active][ready]
vol-aidev01 (36090a07800d98e6657ca340a0000a01c) dm-11 EQLOGIC,100E-00
[size=8.0G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=1][active]
\_ 24:0:0:0 sdh 8:112 [active][ready]
将multipath服务设置成开机自启动
[root@rac121 ~]# chkconfig multipathd on
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