linux平台使用multipath配置asm磁盘
1、multipath配置asm磁盘，本环境为suse11sp3环境。
jason1:~# fdisk -l
Disk/dev/sda: 42.9 GB, 42949672960 bytes
255heads, 63 sectors/track, 5221 cylinders, total 83886080 sectors
Units= sectors of 1 * 512 = 512 bytes
Sectorsize (logical/physical): 512 bytes / 512 bytes
I/Osize (minimum/optimal): 512 bytes / 512 bytes
Diskidentifier: 0x0005e0f3
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 208895 103424 83 Linux
/dev/sda2 208896 8595455 4193280 82 Linux swap / Solaris
/dev/sda3 8595456 83886079 37645312 83 Linux
Disk/dev/sdb: 5242 MB, 5242880000 bytes
162heads, 62 sectors/track, 1019 cylinders, total 10240000 sectors
Units= sectors of 1 * 512 = 512 bytes
Sectorsize (logical/physical): 512 bytes / 512 bytes
I/Osize (minimum/optimal): 512 bytes / 512 bytes
Diskidentifier: 0x00000000
Disk/dev/sdb doesn't contain a valid partition table
Disk/dev/sdc: 2147 MB, 2147483648 bytes
67heads, 62 sectors/track, 1009 cylinders, total 4194304 sectors
Units= sectors of 1 * 512 = 512 bytes
Sectorsize (logical/physical): 512 bytes / 512 bytes
I/Osize (minimum/optimal): 512 bytes / 512 bytes
Diskidentifier: 0x00000000
Disk/dev/sdc doesn't contain a valid partition table
Disk/dev/sdd: 15.7 GB, 15728640000 bytes
64heads, 32 sectors/track, 15000 cylinders, total 30720000 sectors
Units= sectors of 1 * 512 = 512 bytes
Sectorsize (logical/physical): 512 bytes / 512 bytes
I/Osize (minimum/optimal): 512 bytes / 512 bytes
Diskidentifier: 0x00000000
Disk/dev/sdd doesn't contain a valid partition table
jason1:~#
编辑/etc/multipath.conf文件,配置多路径软件。
defaults {
polling_interval 5
path_selector "round-robin 0"
path_grouping_policy failover
uid_attribute "ID_SERIAL"
getuid_callout "/lib/udev/scsi_id --whitelisted --device=/dev/%n"
path_checker directio
rr_weight priorities
failback immediate
no_path_retry queue
queue_without_daemon yes
mode 0644
uid 1100
gid 1200
checker_timeout 30
}
blacklist{
devnode "^sda"
devnode "ofsctl"
}
multipaths{
multipath {
wwid 24d3963ec66158aac
alias ASMOCR
path_grouping_policy failover
user_friendly_names yes
path_selector "round-robin 0"
failback immediate
rr_weight uniform
mode 0644
uid 1100
gid 1200
}
multipath {
wwid 2a188df0f367ec9ad
alias ASMFRA
path_grouping_policy failover
user_friendly_names yes
path_selector "round-robin 0"
failback immediate
rr_weight uniform
mode 0644
uid 1100
gid 1200
}
multipath{
wwid 291bbf9b896a0f503
alias ASMDATA
path_grouping_policy failover
user_friendly_names yes
path_selector "round-robin 0"
failback immediate
rr_weight uniform
mode 0644
uid 1100
gid 1200
}
}
2、修改设备权限
添加/etc/udev/rules.d/99-oracle-asmdevices.rules文件，修改设备文件权限。
jason1:~ # cd /etc/udev/rules.d/
jason1:/etc/udev/rules.d # vi 99-oracle-asmdevices.rules
KERNEL=="dm-0", OWNER="grid", GROUP="asmadmin",MODE="0660"
KERNEL=="dm-1",OWNER="grid", GROUP="asmadmin", MODE="0660"
KERNEL=="dm-2",OWNER="grid", GROUP="asmadmin", MODE="0660"
jason1:/etc/udev/rules.d #
查看生成的设备名称
jason1:/dev/mapper# ll
total0
lrwxrwxrwx1 root root 7 Jan 20 12:37 ASMDATA-> ../dm-2
lrwxrwxrwx1 root root 7 Jan 20 12:33 ASMFRA-> ../dm-0
lrwxrwxrwx1 root root 7 Jan 20 12:37 ASMOCR-> ../dm-1
crw-rw----1 root root 10, 236 Jan 20 12:27 control
jason1:/dev/mapper#
jason1:/dev# ll dm-*
brw-rw----1 grid asmadmin 253, 0 Jan 20 12:40 dm-0
brw-rw----1 grid asmadmin 253, 1 Jan 20 12:40 dm-1
brw-rw----1 grid asmadmin 253, 2 Jan 20 12:40 dm-2
jason1:/dev#
3、开启mutilipath服务
chkconfigboot.multipath on
chkconfigmultipathd on