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Linux下配置多路徑

Linux下配置多路徑   1、安裝多路徑軟件包: device-mapper-1.02.67-2.el5 device-mapper-event-1.02.67.2.el5 device-mapper-multipath-0.4.7-48.el5 [plain]  [root@RKDB01 Server]# rpm -ivh device-mapper-1.02.67-2.el5.x86_64.rpm    warning: device-mapper-1.02.67-2.el5.x86_64.rpm: Header V3 DSA signature: NOKEY, key ID 37017186   Preparing...                ########################################### [100%]           package device-mapper-1.02.67-2.el5.x86_64 is already installed   [root@RKDB01 Server]# rpm -ivh device-mapper-event-1.02.67-2.el5.x86_64.rpm    warning: device-mapper-event-1.02.67-2.el5.x86_64.rpm: Header V3 DSA signature: NOKEY, key ID 37017186   Preparing...                ########################################### [100%]           package device-mapper-event-1.02.67-2.el5.x86_64 is already installed   [root@RKDB01 Server]# rpm -ivh device-mapper-multipath-0.4.7-48.el5.x86_64.rpm    warning: device-mapper-multipath-0.4.7-48.el5.x86_64.rpm: Header V3 DSA signature: NOKEY, key ID 37017186   Preparing...                ########################################### [100%]           package device-mapper-multipath-0.4.7-48.el5.x86_64 is already installed     2、設置開機啟動,並檢查安裝包是否正常: chkconfig --level 345 multipathd on lsmod |grep dm_multipath [plain]  [root@RKDB01 Server]# chkconfig --level 345  multipathd on   [root@RKDB01 Server]# lsmod |grep dm_multipath   dm_multipath           58969  0    scsi_dh                42561  1 dm_multipath   dm_mod                102417  4 dm_mirror,dm_multipath,dm_raid45,dm_log   [root@RKDB01 Server]#      3、配置multipathd 使其正常工作,編輯/etc/multipath.conf,開放如下內容: [plain]  defaults {           udev_dir                /dev           polling_interval        10           selector                "round-robin 0"           path_grouping_policy    multibus           getuid_callout          "/sbin/scsi_id -g -u -s /block/%n"           prio_callout            none           path_checker            readsector0           rr_min_io               100           max_fds                 8192           rr_weight               priorities           failback                immediate           no_path_retry           fail           user_friendly_names     yes   }   blacklist {          wwid 26353900f02796769           devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"           devnode "^hd[a-z]"   }     4、並關閉如下內容 [plain]  #blacklist {   #        devnode "*"   #}   #defaults {        27 #       user_friendly_names yes        28 #}     5、完成之後執行如下命令發現多路徑: [plain]  [root@RKDB01 Server]# modprobe dm-multipath   [root@RKDB01 Server]# multipath -F   [root@RKDB01 Server]# multipath dm-multipath   [root@RKDB01 Server]# multipath dm-round-robin   [root@RKDB01 Server]# service multipathd restart   正在關閉multipathd 端口監控程序:                          [確定]   正在啟動守護進程multipathd:                               [確定]   [root@RKDB01 Server]# multipath -v2   [root@RKDB01 Server]# multipath -v2   [root@RKDB01 Server]# multipath -ll   mpath1 (3600d02310000011b16a5d57c6a1bd99a) dm-0 TOYOU,NetStor_iSUM510   [size=3.3T][features=0][hwhandler=0][rw]   \_ round-robin 0 [prio=2][ena bled]    \_ 1:0:0:0 sdb 8:16  [failed][ready]    \_ 1:0:1:0 sdc 8:32  [failed][ready]   [root@RKDB01 Server]#      6、重啟服務器後,我們可以看到多路徑信息了: [plain]  [root@RKDB01 ~]# ll /dev/mapper/   總計 0   crw------- 1 root root  10, 60 11-05 22:35 control   brw-rw---- 1 root disk 253,  0 11-05 22:35 mpath1   brw-rw---- 1 root disk 253,  1 11-05 22:35 mpath2   [root@RKDB01 ~]# multipath -ll   mpath2 (3600d02310000011b76128b9c63138cf4) dm-1 TOYOU,NetStor_iSUM510   [size=3.2T][features=0][hwhandler=0][rw]   \_ round-robin 0 [prio=2][active]    \_ 1:0:0:1 sdc 8:32  [active][ready]    \_ 1:0:1:1 sde 8:64  [active][ready]   mpath1 (3600d02310000011b16a5d57c6a1bd99a) dm-0 TOYOU,NetStor_iSUM510   [size=20G][features=0][hwhandler=0][rw]   \_ round-robin 0 [prio=2][active]    \_ 1:0:0:0 sdb 8:16  [active][ready]    \_ 1:0:1:0 sdd 8:48  [active][ready]     7、通過fdisk 看可以生成了DM-0/DM-1兩個盤,正是上面sdc/sde,sdb/sdd多路徑後出來的: [plain]  [root@RKDB01 ~]# 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          38      305203+  83  Linux   /dev/sda2              39       13092   104856255   83  Linux   /dev/sda3           13093       19619    52428127+  83  Linux   /dev/sda4           19620       36404   134825512+   5  Extended   /dev/sda5           19620       26146    52428096   83  Linux   /dev/sda6           26147       28757    20972826   83  Linux   /dev/sda7           28758       30324    12586896   82  Linux swap / Solaris   /dev/sda8           30325       36404    48837568+  83  Linux   Disk /dev/sdb: 21.4 GB, 21474836480 bytes   255 heads, 63 sectors/track, 2610 cylinders   Units = cylinders of 16065 * 512 = 8225280 bytes   Disk /dev/sdb doesn't contain a valid partition table   Disk /dev/sdc: 3568.4 GB, 3568429957120 bytes   255 heads, 63 sectors/track, 433836 cylinders   Units = cylinders of 16065 * 512 = 8225280 bytes   Disk /dev/sdc doesn't contain a valid partition table   Disk /dev/sdd: 21.4 GB, 21474836480 bytes   255 heads, 63 sectors/track, 2610 cylinders   Units = cylinders of 16065 * 512 = 8225280 bytes   Disk /dev/sdd doesn't contain a valid partition table   Disk /dev/sde: 3568.4 GB, 3568429957120 bytes   255 heads, 63 sectors/track, 433836 cylinders   Units = cylinders of 16065 * 512 = 8225280 bytes   Disk /dev/sde doesn't contain a valid partition table   Disk /dev/dm-0: 21.4 GB, 21474836480 bytes   255 heads, 63 sectors/track, 2610 cylinders   Units = cylinders of 16065 * 512 = 8225280 bytes   Disk /dev/dm-0 doesn't contain a valid partition table   Disk /dev/dm-1: 3568.4 GB, 3568429957120 bytes   255 heads, 63 sectors/track, 433836 cylinders   Units = cylinders of 16065 * 512 = 8225280 bytes   Disk /dev/dm-1 doesn't contain a valid partition table   Disk /dev/sdf: 4009 MB, 4009754624 bytes   255 heads, 63 sectors/track, 487 cylinders   Units = cylinders of 16065 * 512 = 8225280 bytes      Device Boot      Start         End      Blocks   Id  System   /dev/sdf4   *           1         488     3915744+   b  W95 FAT32   Partition 4 has different physical/logical endings:        phys=(486, 254, 63) logical=(487, 125, 22)   [root@RKDB01 ~]#      8、我們同時也可以在/dev/mapper目錄中查看到多路徑映射的信息: [plain]  [root@RKDB01 ~]# ll /dev/mapper/   總計 0   crw------- 1 root root  10, 60 11-06 00:49 control   brw-rw---- 1 root disk 253,  2 11-06 00:49 data-data001   brw-rw---- 1 root disk 253,  0 11-06 00:49 mpath1   brw-rw---- 1 root disk 253,  1 11-06 00:49 mpath2  
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