1、linux多路徑的使用及介紹（三）1. 安裝多路徑軟件包； device-mapper-1.02.13xxx.rpm,該軟件運(yùn)行在底層，主要舉行設(shè)備和映射(系統(tǒng)已經(jīng)自動(dòng)安裝)。 device-mapper-multipath-0.4.7xxx.rpm ，此軟件包rhel5默認(rèn)已經(jīng)安裝; 2. 安裝fc hba 驅(qū)動(dòng)； 當(dāng)前的新版linux已經(jīng)自帶多數(shù)fc hba驅(qū)動(dòng)； 此時(shí)假如需要安裝官方驅(qū)動(dòng)，比如安裝hp提供的 hp 81e hba驅(qū)動(dòng)，需要注重其解釋內(nèi)指定的支持os版本范圍；雖然rhel5.7已經(jīng)發(fā)布，但是hp的驅(qū)動(dòng)僅僅支持到rhel5.6 , 強(qiáng)行安裝的話(huà)，只會(huì)導(dǎo)致報(bào)錯(cuò)甚至系統(tǒng)崩潰； 3

2、. 更新/etc/multipath.conf 設(shè)定文件， 可參考后續(xù)第六步； 4. 設(shè)定multipathd 服務(wù)自動(dòng)啟動(dòng)并初始化； multipathd on multipath -f multipath -v2 5. mulitpath -ll , 看到下列類(lèi)似輸入，表示已經(jīng)勝利！ mpath0 (36001438005dee7fd0000500000a00000) dm-2 hp,hsv400 size=500gfeatures=1 queue_if_no_pathhwhandler=0rw _ round-robin 0 prio=200active _ 2:0:3:1 sdb 8:

3、16 activeready _ 2:0:6:1 sdc 8:32 activeready _ 3:0:3:1 s 8:80 activeready _ 3:0:7:1 sdh 8:112 activeready _ round-robin 0 prio=40d _ 2:0:2:1 sda 8:0 activeready _ 2:0:7:1 s 8:48 activeready _ 3:0:1:1 sde 8:64 activeready _ 3:0:5:1 sdg 8:96 activeready 6. 以下為hp提供的 hpdmmultipath-4.4.1.tar.gz 所提供的 mul

4、tipath.conf 文件,供參考； 該軟件包貌似可以不需要安裝： donot it the first two lines of this or remove this file hp device mapper multipath enablement kit v4.4.1 the device mapper multipath template configuration file for rhel5u4 or later releases to be u with hp storageworks arrays. use this configuration file as your

5、/etc/multipath.conf file. if you already have a val working configuration file, refer here for the recommended configuration for hp arrays. for a list of configuration options with descriptions, please refer to /usr/share/doc/ multipath-too-version /multipath.conf.annotated the defaults section defa

6、ults udev_dir /dev polling_interval 10 selector round-robin 0 path_grou_policy failover getuid_callout /sbin/scsi_id -g -u -s /block/%n prio_callout /bin/ue path_checker tur rr_min_io 100 rr_weight unifo failback immediate no_path_retry 12 user_friendly_names yes the blacklist section - use this to

7、blacklist a multipath device based on it's wwid ( using wwid ) or device names ( using devnode ) or vendor and proct id ( using device block). blacklist wwid 26353900f02796769 devnode (ram|raw|loop|fd|md|dm-|sr|s|st)0-9* devnode hda-z0-9* devnode cciss!c0-9d0-9* device vendor hp product open-* t

8、he blacklist_ceptions section - to list device names to be treated as multipath candis even if they are on the blacklist. note: blacklist exceptions are only valid in the same class. it is not possible to blacklist devices using the devnode keyword and to exclude some devices of them using the wwid

9、keyword. blacklist_exceptions wwid 2345234245647657 devnode sda device vendor hp product open-* the multipaths section - uomment this section to define a per multipath device tings. multipaths uncomment the multipath block to modify the settings of a multipath device based on its wwid multipath wwid

10、 2039485769900000000 red path_grouping_policy group_by_prio path_selector round-robin 0 failback immediate rr_weight uniform no_path_retry 10 rr_min_io 100 the devices section - used to define per storage array model settings devices if you are already using a valid configuration file and do not hav

11、e a device bsection for hp arrays, please add the appropriate device subsection for the respective arrays from the entries below. if you already have a device subsection for hp arrays has erent parameters from the entries below, modify it appropriately. for eva a/a arrays device vendor hp|compaq pro

12、duct hsv1011 (c)compaq|hsv2010|hsv300|hsv4050 path_grouping_policy group_by_prio getuid_callout /sbin/scsi_id -g -u -s /block/%n path_checker tur path_selector round-robin 0 prio_callout /sbin/mpath_prio_alua /dev/%n rr_weight uniform failback immediate hardware_handler 0 no_path_retry 18 rr_min_io

13、100 for hp p2000 family device vendor hp product p2000 g3 fc|p2000g3 fc/iscsi path_grouping_policy group_by_prio getuid_callout /sbin/scsi_id -g -u -s /block/%n path_checker tur path_selector round-robin 0 prio_callout /sbin/mpath_prio_alua /dev/%n rr_weight uniform failback immediate hardware_handl

14、er 0 no_path_retry 18 rr_min_io 100 for xp arrays device vendor hp product open-.* path_grouping_policy multibus getuid_callout /sbin/scsi_id -g -u -s /block/%n path_selector round-robin 0 rr_weight uniform path_checker tur hardware_handler 0 failback immediate no_path_retry 18 rr_min_io 1000 for ms

15、a a/a arrays device vendor hp product msa volume* path_grouping_policy group_by_prio getuid_callout /sbin/scsi_id -g -u -s /block/%n path_checker tur path_selector round-robin 0 prio_callout /sbin/mpath_prio_alua /dev/%n rr_weight uniform failback immediate hardware_handler 0 no_path_retry 18 rr_min

16、_io 100 for msa2xxxsa arrays device vendor hp product msa2012sa|msa2312sa|msa2324sa path_grouping_policy group_by_prio getuid_callout /sbin/scsi_id -g -u -n -s /block/%n path_checker tur path_selector round-robin 0 prio_callout /sbin/mpath_prio_alua %d rr_weight uniform failback immediate hardware_h

17、andler 0 no_path_retry 18 rr_min_io 100 for msa23xxfc and msa23xxi arrays device vendor hp product msa2312fc|msa2324fc|msa2312i|msa2324i path_grouping_policy group_by_prio getuid_callout /sbin/scsi_id -g -u -s /block/%n path_checker tur path_selector round-robin 0 prio_callout /sbin/mpath_prio_alua /dev/%n rr_weight uniform failback immediate hardware_handler 0 no_path_retry 18 rr_min_io 100 for msa20xxfc, msa22xxfc and msa20xxi arrays device vendor hp product msa20212fc|msa2012i path_grouping_policy multibus getuid_callout /sbin/scsi_id -g -u -s /block/%n path