RHEL5使用multipath配置ASMdisk

fdisk查看磁盘 [root@db11g ~]# cat /etc/redhat-release Red Hat Enterprise Linux Server release 5.9 (Tikanga)[root@db11g ~]# [root@db11g ~]# [root@db11g ~]# fdisk -lDisk /dev/sda: 32.2 GB, 32212254720 bytes255 heads, 63 sectors/track, 3916 c

fdisk查看磁盘

[root@db11g ~]# cat /etc/redhat-release 
Red Hat Enterprise Linux Server release 5.9 (Tikanga)
[root@db11g ~]# 
[root@db11g ~]# 
[root@db11g ~]# fdisk -l

Disk /dev/sda: 32.2 GB, 32212254720 bytes
255 heads, 63 sectors/track, 3916 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        3916    31350847+  8e  Linux LVM

Disk /dev/sdb: 17.1 GB, 17179869184 bytes
255 heads, 63 sectors/track, 2088 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Disk /dev/sdb doesn't contain a valid partition table

Disk /dev/sdc: 10.7 GB, 10737418240 bytes
255 heads, 63 sectors/track, 1305 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Disk /dev/sdc doesn't contain a valid partition table

获取scsi id

[root@db11g ~]# /sbin/scsi_id -g -u -s /block/sdb
SATA_VBOX_HARDDISK_VB3c0bb909-10aab3a0_
[root@db11g ~]# /sbin/scsi_id -g -u -s /block/sdc
SATA_VBOX_HARDDISK_VB3edd7dc1-fd831bf4_

在RHEL6下使用以下命令

scsi_id --whitelisted --replace-whitespace –-device=/dev/sdb

安装multipath rpm包

[root@db11g ~]# yum install device-mapper*
Loaded plugins: rhnplugin, security
This system is not registered with ULN.
You can use up2date --register to register.
ULN support will be disabled.
Setting up Install Process
Package device-mapper-multipath-0.4.9-56.0.3.el5.x86_64 already installed and latest version
Package device-mapper-multipath-libs-0.4.9-56.0.3.el5.x86_64 already installed and latest version
Package device-mapper-event-1.02.67-2.el5.x86_64 already installed and latest version
Package device-mapper-1.02.67-2.el5.x86_64 already installed and latest version
Package device-mapper-1.02.67-2.el5.i386 already installed and latest version
Nothing to do
[root@db11g ~]# 
[root@db11g ~]# 
[root@db11g ~]# 
[root@db11g ~]# 
[root@db11g ~]# rpm -qa|grep device-mapper
device-mapper-multipath-libs-0.4.9-56.0.3.el5
device-mapper-event-1.02.67-2.el5
device-mapper-1.02.67-2.el5
device-mapper-1.02.67-2.el5
device-mapper-multipath-0.4.9-56.0.3.el5

获取grid用户的uid和gid，这里的gid是asmadmin组的gid

[root@db11g ~]# cat /etc/passwd|grep grid
grid:x:1100:1000:Grid Infrastructure Owner:/home/grid:/bin/bash
[root@db11g ~]# cat /etc/group|grep asmadmin
asmadmin:x:1200:grid,oracle
[root@db11g ~]# id -a grid
uid=1100(grid) gid=1000(oinstall) groups=1000(oinstall),1200(asmadmin),1201(asmdba),1202(asmoper),1300(dba)

配置/etc/multipath.conf

[root@db11g ~]# cp /usr/share/doc/device-mapper-multipath-0.4.9/multipath.conf /etc/
[root@db11g ~]# cat /etc/multipath.conf
defaults {
user_friendly_names no
queue_without_daemon no
flush_on_last_del yes
max_fds max
}
 
blacklist {
devnode "^hd[a-z]"
devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"
devnode "^cciss.*"
}
 
devices {
        device {
                vendor                  "OPNFILER "
                product                 "LUN"
                path_grouping_policy    group_by_prio
                features                "3 queue_if_no_path pg_init_retries 50"
                getuid_callout          "/sbin/scsi_id -g -u -s /block/%n"
                path_checker            tur
                path_selector           "round-robin 0"
                hardware_handler        "1 alua"
                failback                immediate
                rr_weight               uniform
                rr_min_io               128
        }
}
 
multipaths {
        multipath {
                wwid                    SATA_VBOX_HARDDISK_VB3c0bb909-10aab3a0_ 
                alias                   datadisk
                uid                     1100                                               
                gid                     1200                                              
        }
 
 
 
        multipath {
                wwid                    SATA_VBOX_HARDDISK_VB3edd7dc1-fd831bf4_   
                alias                   fradisk                                          
                uid                     1100                                               
                gid                     1200                                               
         }
}

启动multipath

[root@db11g ~]# modprobe dm-multipath
[root@db11g ~]# modprobe dm-round-robin
[root@db11g ~]# chkconfig multipathd start
[root@db11g ~]# chkconfig multipathd on
[root@db11g ~]# /etc/init.d/multipathd start
Starting multipathd daemon: [  OK  ]
[root@db11g ~]# ps -ef|grep multipathd
root      3084     1  0 13:16 ?        00:00:00 /sbin/multipathd
root      3186  2877  0 13:16 pts/0    00:00:00 grep multipathd
[root@db11g ~]# multipath -F
[root@db11g ~]# multipath -v2
Jan 15 13:17:40 | SATA_VBOX_HARDDISK_VBa64c2685-cc2f3dd0_: ignoring map
create: datadisk (SATA_VBOX_HARDDISK_VB3c0bb909-10aab3a0_) undef ATA,VBOX HARDDISK
size=16G features='0' hwhandler='0' wp=undef
`-+- policy='round-robin 0' prio=1 status=undef
  `- 1:0:0:0 sdb 8:16 undef ready running
create: fradisk (SATA_VBOX_HARDDISK_VB3edd7dc1-fd831bf4_) undef ATA,VBOX HARDDISK
size=10G features='0' hwhandler='0' wp=undef
`-+- policy='round-robin 0' prio=1 status=undef
  `- 2:0:0:0 sdc 8:32 undef ready running
[root@db11g ~]# 
[root@db11g ~]# multipath -ll
fradisk (SATA_VBOX_HARDDISK_VB3edd7dc1-fd831bf4_) dm-3 ATA,VBOX HARDDISK
size=10G features='0' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
  `- 2:0:0:0 sdc 8:32 active ready running
datadisk (SATA_VBOX_HARDDISK_VB3c0bb909-10aab3a0_) dm-2 ATA,VBOX HARDDISK
size=16G features='0' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
  `- 1:0:0:0 sdb 8:16 active ready running

[root@db11g ~]# ll /dev/mapper/*disk
brw-rw---- 1 grid asmadmin 252, 2 Jan 15 13:17 /dev/mapper/datadisk
brw-rw---- 1 grid asmadmin 252, 3 Jan 15 13:17 /dev/mapper/fradisk