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之前發布了一篇《Oracle_lhr_RAC 12cR1安裝》，但是其中的存儲并沒有使用多路徑，而是使用了VMware自身提供的存儲。所以，年前最后一件事就是把多路徑學習一下，本文介紹了OpenFiler、iSCSI和多路徑的配置。
本文內容：
OpenFile是在rPath Linux基礎上開發的，它能夠作為一個獨立的Linux操作系統發行。Openfiler是一款非常好的存儲管理操作系統，開源免費，通過web界面對存儲磁盤的管理，支持現在流行的網絡存儲技術IP-SAN和NAS，支持iSCSI、NFS、SMB/CIFS及FTP等協議。
本次安裝OpenFiler鎖需要的軟件如下所示：
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序號 |
類型 |
內容 |
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1 |
openfiler |
openfileresa-2.99.1-x86_64-disc1.iso |
注：這些軟件小麥苗已上傳到騰訊微云（http://blog.itpub.net/26736162/viewspace-1624453/），各位朋友可以去下載。另外，小麥苗已經將安裝好的虛擬機上傳到了云盤，里邊已集成了rlwrap軟件。
詳細安裝過程小麥苗就不一個一個截圖了，網上已經有網友貼出了一步一步的過程，OpenFiler的內存設置為1G大小或再小點也無所謂，磁盤選用IDE磁盤格式，由于后續要配置多路徑，所以需要安裝2塊網卡。安裝完成后，重新啟動，界面如下所示：
注意，方框中的內容，可以在瀏覽器中直接打開。可以用root用戶登錄進行用戶的維護，若進行存儲的維護則只能使用openfiler用戶。openfiler是在遠程使用Web界面進行管理的，小麥苗這里的管理地址是https://192.168.59.200:446，其管理的初始用戶名是openfiler（小寫的），密碼是password，可以在登錄之后，修改這個密碼。
配置靜態網卡地址：
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[root@OFLHR ~]# more /etc/sysconfig/network-scripts/ifcfg-eth0 # Advanced Micro Devices [AMD] 79c970 [PCnet32 LANCE] DEVICE=eth0 BOOTPROTO=static BROADCAST=192.168.59.255 HWADDR=00:0C:29:98:1A:CD IPADDR=192.168.59.200 NETMASK=255.255.255.0 NETWORK=192.168.59.0 ONBOOT=yes [root@OFLHR ~]# more /etc/sysconfig/network-scripts/ifcfg-eth2 DEVICE=eth2 MTU=1500 USERCTL=no ONBOOT=yes BOOTPROTO=static IPADDR=192.168.2.200 NETMASK=255.255.255.0 HWADDR=00:0C:29:98:1A:D7 [root@OFLHR ~]# ip a 1: lo: mtu 16436 qdisc noqueue link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: eth0: mtu 1500 qdisc pfifo_fast qlen 1000 link/ether 00:0c:29:98:1a:cd brd ff:ff:ff:ff:ff:ff inet 192.168.59.200/24 brd 192.168.59.255 scope global eth0 inet6 fe80::20c:29ff:fe98:1acd/64 scope link valid_lft forever preferred_lft forever 3: eth2: mtu 1500 qdisc pfifo_fast qlen 1000 link/ether 00:0c:29:98:1a:d7 brd ff:ff:ff:ff:ff:ff inet 192.168.2.200/24 brd 192.168.2.255 scope global eth2 inet6 fe80::20c:29ff:fe98:1ad7/64 scope link valid_lft forever preferred_lft forever [root@OFLHR ~]#
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添加一塊100G大小的IDE格式的硬盤作為存儲。
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[root@OFLHR ~]# fdisk -l
Disk /dev/sda: 10.7 GB, 10737418240 bytes 255 heads, 63 sectors/track, 1305 cylinders, total 20971520 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x000adc2c
Device Boot Start End Blocks Id System /dev/sda1 * 63 610469 305203+ 83 Linux /dev/sda2 610470 17382329 8385930 83 Linux /dev/sda3 17382330 19486844 1052257+ 82 Linux swap / Solaris
Disk /dev/sdb: 107.4 GB, 107374182400 bytes 255 heads, 63 sectors/track, 13054 cylinders, total 209715200 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000
Disk /dev/sdb doesn't contain a valid partition table [root@OFLHR ~]#
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為openfiler服務器配置了兩塊硬盤，其中10GB的硬盤已經用來安裝openfiler操作系統，而200GB的硬盤則會用做數據存儲。
登錄地址：https://192.168.59.200:446
初始用戶名和密碼：openfiler/password
在獨立存儲設備中，LUN（Logical Unit Number）是最重要的基本單位。LUN可以被SAN中的任何主機訪問，不管是透過HBA或是iSCSI。就算是軟件激活的iSCSI，也可以在不同的操作系統之下，在操作系統啟動之后利用軟件的iSCSI initiator訪問LUN。在OpenFiler之下，LUN被稱為Logical Volume（LV），因此在OpenFiler下創建LUN就是創建LV。
當你安裝好OpenFiler之后，接下來就是要將OpenFiler下的磁盤分享出來給虛擬機或網絡上的其他主機使用了。在標準的SAN之后，這些可以在RAID層面完成，但VG的好處及彈性是RAID無法比較的，下面看看OpenFiler下的VG是如何一步一步創建的。
創建VG的步驟：
（1）進入OpenFiler的接口，并且選擇要使用的實體硬盤。
（2）將要加入的實體硬盤格式化成Physical Volume格式。
（3）創建一個VG組，并且將格式化成為PV格式的實體硬盤加入。
（4）加入完畢之后，就成為一個大的VG組，被視為系統的一個大實體硬盤。
（5）在這個VG中添加邏輯分割區LUN，在OpenFiler中稱為Logical Volume。
（6）指定LUN的文件格式，如iSCSI、ext3或是NFS，并且格式化。
（7）如果是iSCSI則需要再配置，如果是其他文件格式，就可以用NAS的方式分享出去而
登錄后，點擊Volumes標簽
為openfiler服務器配置了兩塊硬盤，其中10GB的硬盤已經用來安裝openfiler操作系統，而200GB的硬盤則會用做數據存儲。
點擊create new physical volumes后點擊/dev/sdb
點擊頁面右下角Reset，然后點擊Create。分區類型為Physical volume
點擊Volume Groups
輸入名稱，勾選復選框，單擊Add volume group
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[root@OFLHR ~]# fdisk -l
Disk /dev/sda: 10.7 GB, 10737418240 bytes 255 heads, 63 sectors/track, 1305 cylinders, total 20971520 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x000adc2c
Device Boot Start End Blocks Id System /dev/sda1 * 63 610469 305203+ 83 Linux /dev/sda2 610470 17382329 8385930 83 Linux /dev/sda3 17382330 19486844 1052257+ 82 Linux swap / Solaris
WARNING: GPT (GUID Partition Table) detected on '/dev/sdb'! The util fdisk doesn't support GPT. Use GNU Parted.
Disk /dev/sdb: 107.4 GB, 107374182400 bytes 255 heads, 63 sectors/track, 13054 cylinders, total 209715200 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000
Device Boot Start End Blocks Id System /dev/sdb1 1 209715199 104857599+ ee GPT [root@OFLHR ~]# pvs PV VG Fmt Attr PSize PFree /dev/sdb1 vmlhr lvm2 a- 95.34g 95.34g [root@OFLHR ~]#
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點擊Add Volume
輸入內容，調整磁盤大小為10G，卷類型選擇block（iSCSI，FC，etc）
依次共創建4個邏輯卷：
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[root@OFLHR ~]# vgs VG #PV #LV #SN Attr VSize VFree vmlhr 1 4 0 wz--n- 95.34g 55.34g [root@OFLHR ~]# pvs PV VG Fmt Attr PSize PFree /dev/sdb1 vmlhr lvm2 a- 95.34g 55.34g [root@OFLHR ~]# lvs LV VG Attr LSize Origin Snap% Move Log Copy% Convert lv01 vmlhr -wi-a- 10.00g lv02 vmlhr -wi-a- 10.00g lv03 vmlhr -wi-a- 10.00g lv04 vmlhr -wi-a- 10.00g [root@OFLHR ~]# fdisk -l
Disk /dev/sda: 10.7 GB, 10737418240 bytes 255 heads, 63 sectors/track, 1305 cylinders, total 20971520 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x000adc2c
Device Boot Start End Blocks Id System /dev/sda1 * 63 610469 305203+ 83 Linux /dev/sda2 610470 17382329 8385930 83 Linux /dev/sda3 17382330 19486844 1052257+ 82 Linux swap / Solaris
WARNING: GPT (GUID Partition Table) detected on '/dev/sdb'! The util fdisk doesn't support GPT. Use GNU Parted.
Disk /dev/sdb: 107.4 GB, 107374182400 bytes 255 heads, 63 sectors/track, 13054 cylinders, total 209715200 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000
Device Boot Start End Blocks Id System /dev/sdb1 1 209715199 104857599+ ee GPT
Disk /dev/dm-0: 10.7 GB, 10737418240 bytes 255 heads, 63 sectors/track, 1305 cylinders, total 20971520 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000
Disk /dev/dm-0 doesn't contain a valid partition table
Disk /dev/dm-1: 10.7 GB, 10737418240 bytes 255 heads, 63 sectors/track, 1305 cylinders, total 20971520 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000
Disk /dev/dm-1 doesn't contain a valid partition table
Disk /dev/dm-2: 10.7 GB, 10737418240 bytes 255 heads, 63 sectors/track, 1305 cylinders, total 20971520 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000
Disk /dev/dm-2 doesn't contain a valid partition table
Disk /dev/dm-3: 10.7 GB, 10737418240 bytes 255 heads, 63 sectors/track, 1305 cylinders, total 20971520 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000
Disk /dev/dm-3 doesn't contain a valid partition table [root@OFLHR ~]#
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點擊Services標簽欄設置iSCSI Target 為Enable 開啟服務Start。
返回Volumes標簽頁，點擊iSCSI Targets
點擊Add
選擇LUN Mapping標簽 點擊Map
由于iSCSI是走IP網絡，因此我們要允許網絡中的計算機可以透過IP來訪問。下面就是OpenFiler中IP網絡和同一網段中其他主機的連接方法。
1．進入OpenFiler中的System，并且直接拉到頁面的下方。
2．在Network Access Configuration的地方輸入這個網絡訪問的名稱，如VM_LHR。
3．輸入主機的IP段。注意不可以輸入單一主機的IP，這樣會都無法訪問。我們在這邊輸入192.168.59.0，表示從192.168.59.1一直到192.168.59.254都能訪問。
4．在Netmask中選擇255.255.255.0，并且在Type下拉列表框中選擇Share，之后即可以單擊Update按鈕。
選擇完之后就更新
至此就可以在這個OpenFiler中看到被授權的網段了。
在iSCSI Targets中，點擊 Network ACL 標簽
設置Access為Allow 然后點擊Update
到此存儲的配置已經完成
注釋掉iqn.2006-01.com.openfiler:tsn.5e423e1e4d90 ALL：
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[root@OFLHR ~]# more /etc/initiators.deny
# PLEASE DO NOT MODIFY THIS CONFIGURATION FILE! # This configuration file was autogenerated # by Openfiler. Any manual changes will be overwritten # Generated at: Sat Jan 21 1:49:55 CST 2017
#iqn.2006-01.com.openfiler:tsn.5e423e1e4d90 ALL
# End of Openfiler configuration
[root@OFLHR ~]#
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iSCSI（Internet Small Computer System Interface）。iSCSI技術由IBM公司研究開發，是一個供硬件設備使用的、可以在IP協議的上層運行的SCSI指令集，這種指令集合可以實現在IP網絡上運行SCSI協議，使其能夠在諸如高速千兆以太網上進行路由選擇。iSCSI技術是一種新儲存技術，該技術是將現有SCSI接口與以太網絡(Ethernet)技術結合，使服務器可與使用IP網絡的儲存裝置互相交換資料。iSCSI是一種基于 TCP/IP 的協議，用來建立和管理 IP存儲設備、主機和客戶機等之間的相互連接，并創建存儲區域網絡（SAN）。
iSCSI target：就是儲存設備端，存放磁盤或RAID的設備，目前也能夠將Linux主機模擬成iSCSI target了！目的在提供其他主機使用的『磁盤』；
iSCSI initiator：就是能夠使用target的用戶端，通常是服務器。也就是說，想要連接到iSCSI target的服務器，也必須要安裝iSCSI initiator的相關功能后才能夠使用iSCSI target提供的磁盤。
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[root@OFLHR ~]# service iscsi-target start Starting iSCSI target service: [ OK ] [root@OFLHR ~]# more /etc/ietd.conf ##### WARNING!!! - This configuration file generated by Openfiler. DO NOT MANUALLY EDIT. #####
Target iqn.2006-01.com.openfiler:tsn.5e423e1e4d90 HeaderDigest None DataDigest None MaxConnections 1 InitialR2T Yes ImmediateData No MaxRecvDataSegmentLength 131072 MaxXmitDataSegmentLength 131072 MaxBurstLength 262144 FirstBurstLength 262144 DefaultTime2Wait 2 DefaultTime2Retain 20 MaxOutstandingR2T 8 DataPDUInOrder Yes DataSequenceInOrder Yes ErrorRecoveryLevel 0 Lun 0 Path=/dev/vmlhr/lv01,Type=blockio,ScsiSN=22llvD-CacO-MOMA,ScsiId=22llvD-CacO-MOMA,IOMode=wt Lun 1 Path=/dev/vmlhr/lv02,Type=blockio,ScsiSN=BgLpy9-u7PH-csDC,ScsiId=BgLpy9-u7PH-csDC,IOMode=wt Lun 2 Path=/dev/vmlhr/lv03,Type=blockio,ScsiSN=38KsSC-REKL-yPgW,ScsiId=38KsSC-REKL-yPgW,IOMode=wt Lun 3 Path=/dev/vmlhr/lv04,Type=blockio,ScsiSN=aN5blo-NyMp-L4Jl,ScsiId=aN5blo-NyMp-L4Jl,IOMode=wt
[root@OFLHR ~]# ps -ef|grep iscsi root 937 2 0 01:01 ? 00:00:00 [iscsi_eh] root 946 1 0 01:01 ? 00:00:00 iscsid root 947 1 0 01:01 ? 00:00:00 iscsid root 13827 1217 0 02:43 pts/1 00:00:00 grep iscsi [root@OFLHR ~]# cat /proc/net/iet/volume tid:1 name:iqn.2006-01.com.openfiler:tsn.5e423e1e4d90 lun:0 state:0 iotype:blockio iomode:wt path:/dev/vmlhr/lv01 lun:1 state:0 iotype:blockio iomode:wt path:/dev/vmlhr/lv02 lun:2 state:0 iotype:blockio iomode:wt path:/dev/vmlhr/lv03 lun:3 state:0 iotype:blockio iomode:wt path:/dev/vmlhr/lv04 [root@OFLHR ~]# cat /proc/net/iet/session tid:1 name:iqn.2006-01.com.openfiler:tsn.5e423e1e4d90 [root@OFLHR ~]#
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RAC的2個節點分別安裝iSCSI initiator。
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[root@raclhr-12cR1-N1 ~]# rpm -qa|grep iscsi iscsi-initiator-utils-6.2.0.873-10.el6.x86_64 [root@raclhr-12cR1-N1 ~]#
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若未安裝可使用yum install iscsi-initiator-utils*進行安裝。
iscsi initiator主要通過iscsiadm命令管理，我們先查看提供服務的iscsi target機器上有哪些target:
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[root@raclhr-12cR1-N1 ~]# iscsiadm --mode discovery --type sendtargets --portal 192.168.59.200 [ OK ] iscsid: [ OK ] 192.168.59.200:3260,1 iqn.2006-01.com.openfiler:tsn.5e423e1e4d90 192.168.2.200:3260,1 iqn.2006-01.com.openfiler:tsn.5e423e1e4d90 [root@raclhr-12cR1-N1 ~]# ps -ef|grep iscsi root 2619 2 0 11:32 ? 00:00:00 [iscsi_eh] root 2651 1 0 11:32 ? 00:00:00 iscsiuio root 2658 1 0 11:32 ? 00:00:00 iscsid root 2659 1 0 11:32 ? 00:00:00 iscsid root 2978 56098 0 11:33 pts/1 00:00:00 grep iscsi [root@raclhr-12cR1-N1 ~]#
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到這一步就可以看出，你服務端創建的iSCSI Target 的編號和名稱。這條命令只需記住-p后面跟iSCSI服務的地址就行了，也可以是主機名，都可以！3260是服務的端口號，默認的！
然后就可以登陸某個target了，登陸成功某個target后，這個target下的硬盤也就都共享過來了：
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[root@raclhr-12cR1-N1 ~]# fdisk -l | grep dev Disk /dev/sda: 21.5 GB, 21474836480 bytes /dev/sda1 * 1 26 204800 83 Linux /dev/sda2 26 1332 10485760 8e Linux LVM /dev/sda3 1332 2611 10279936 8e Linux LVM Disk /dev/sdb: 107.4 GB, 107374182400 bytes /dev/sdb1 1 1306 10485760 8e Linux LVM /dev/sdb2 1306 2611 10485760 8e Linux LVM /dev/sdb3 2611 3917 10485760 8e Linux LVM /dev/sdb4 3917 13055 73399296 5 Extended /dev/sdb5 3917 5222 10485760 8e Linux LVM /dev/sdb6 5223 6528 10485760 8e Linux LVM /dev/sdb7 6528 7834 10485760 8e Linux LVM /dev/sdb8 7834 9139 10485760 8e Linux LVM /dev/sdb9 9139 10445 10485760 8e Linux LVM /dev/sdb10 10445 11750 10485760 8e Linux LVM /dev/sdb11 11750 13055 10477568 8e Linux LVM Disk /dev/sde: 10.7 GB, 10737418240 bytes Disk /dev/sdc: 6442 MB, 6442450944 bytes Disk /dev/sdd: 10.7 GB, 10737418240 bytes Disk /dev/mapper/vg_rootlhr-Vol02: 2147 MB, 2147483648 bytes Disk /dev/mapper/vg_rootlhr-Vol00: 10.7 GB, 10737418240 bytes Disk /dev/mapper/vg_orasoft-lv_orasoft_u01: 21.5 GB, 21474836480 bytes Disk /dev/mapper/vg_orasoft-lv_orasoft_soft: 21.5 GB, 21474836480 bytes Disk /dev/mapper/vg_rootlhr-Vol01: 3221 MB, 3221225472 bytes Disk /dev/mapper/vg_rootlhr-Vol03: 3221 MB, 3221225472 bytes [root@raclhr-12cR1-N1 ~]# iscsiadm --mode node --targetname iqn.2006-01.com.openfiler:tsn.5e423e1e4d90 –portal 192.168.59.200:3260 --login Logging in to [iface: default, target: iqn.2006-01.com.openfiler:tsn.5e423e1e4d90, portal: 192.168.59.200,3260] (multiple) Logging in to [iface: default, target: iqn.2006-01.com.openfiler:tsn.5e423e1e4d90, portal: 192.168.2.200,3260] (multiple) Login to [iface: default, target: iqn.2006-01.com.openfiler:tsn.5e423e1e4d90, portal: 192.168.59.200,3260] successful. Login to [iface: default, target: iqn.2006-01.com.openfiler:tsn.5e423e1e4d90, portal: 192.168.2.200,3260] successful. [root@raclhr-12cR1-N1 ~]# [root@raclhr-12cR1-N1 ~]# fdisk -l | grep dev Disk /dev/sda: 21.5 GB, 21474836480 bytes /dev/sda1 * 1 26 204800 83 Linux /dev/sda2 26 1332 10485760 8e Linux LVM /dev/sda3 1332 2611 10279936 8e Linux LVM Disk /dev/sdb: 107.4 GB, 107374182400 bytes /dev/sdb1 1 1306 10485760 8e Linux LVM /dev/sdb2 1306 2611 10485760 8e Linux LVM /dev/sdb3 2611 3917 10485760 8e Linux LVM /dev/sdb4 3917 13055 73399296 5 Extended /dev/sdb5 3917 5222 10485760 8e Linux LVM /dev/sdb6 5223 6528 10485760 8e Linux LVM /dev/sdb7 6528 7834 10485760 8e Linux LVM /dev/sdb8 7834 9139 10485760 8e Linux LVM /dev/sdb9 9139 10445 10485760 8e Linux LVM /dev/sdb10 10445 11750 10485760 8e Linux LVM /dev/sdb11 11750 13055 10477568 8e Linux LVM Disk /dev/sde: 10.7 GB, 10737418240 bytes Disk /dev/sdc: 6442 MB, 6442450944 bytes Disk /dev/sdd: 10.7 GB, 10737418240 bytes Disk /dev/mapper/vg_rootlhr-Vol02: 2147 MB, 2147483648 bytes Disk /dev/mapper/vg_rootlhr-Vol00: 10.7 GB, 10737418240 bytes Disk /dev/mapper/vg_orasoft-lv_orasoft_u01: 21.5 GB, 21474836480 bytes Disk /dev/mapper/vg_orasoft-lv_orasoft_soft: 21.5 GB, 21474836480 bytes Disk /dev/mapper/vg_rootlhr-Vol01: 3221 MB, 3221225472 bytes Disk /dev/mapper/vg_rootlhr-Vol03: 3221 MB, 3221225472 bytes Disk /dev/sdf: 10.7 GB, 10737418240 bytes Disk /dev/sdi: 10.7 GB, 10737418240 bytes Disk /dev/sdh: 10.7 GB, 10737418240 bytes Disk /dev/sdl: 10.7 GB, 10737418240 bytes Disk /dev/sdj: 10.7 GB, 10737418240 bytes Disk /dev/sdg: 10.7 GB, 10737418240 bytes Disk /dev/sdk: 10.7 GB, 10737418240 bytes Disk /dev/sdm: 10.7 GB, 10737418240 bytes
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這里多出了8塊盤，在openfiler中只map了四次，為什么這里是8塊而不是4塊呢？因為openfiler有2塊網卡，使用兩個IP登錄兩次iscsi target，所以這里有兩塊是重復的
要查看各個iscsi的信息：
# iscsiadm -m session -P 3
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[root@raclhr-12cR1-N1 ~]# [root@raclhr-12cR1-N1 ~]# iscsiadm -m session -P 3 iSCSI Transport Class version 2.0-870 version 6.2.0-873.10.el6 Target: iqn.2006-01.com.openfiler:tsn.5e423e1e4d90 Current Portal: 192.168.59.200:3260,1 Persistent Portal: 192.168.59.200:3260,1 ********** Interface: ********** Iface Name: default Iface Transport: tcp Iface Initiatorname: iqn.1994-05.com.redhat:61d32512355 Iface IPaddress: 192.168.59.160 Iface HWaddress: Iface Netdev: SID: 1 iSCSI Connection State: LOGGED IN iSCSI Session State: LOGGED_IN Internal iscsid Session State: NO CHANGE ********* Timeouts: ********* Recovery Timeout: 120 Target Reset Timeout: 30 LUN Reset Timeout: 30 Abort Timeout: 15 ***** CHAP: ***** username: password: ******** username_in: password_in: ******** ************************ Negotiated iSCSI params: ************************ HeaderDigest: None DataDigest: None MaxRecvDataSegmentLength: 262144 MaxXmitDataSegmentLength: 131072 FirstBurstLength: 262144 MaxBurstLength: 262144 ImmediateData: No InitialR2T: Yes MaxOutstandingR2T: 1 ************************ Attached SCSI devices: ************************ Host Number: 4 State: running scsi4 Channel 00 Id 0 Lun: 0 Attached scsi disk sdg State: running scsi4 Channel 00 Id 0 Lun: 1 Attached scsi disk sdj State: running scsi4 Channel 00 Id 0 Lun: 2 Attached scsi disk sdk State: running scsi4 Channel 00 Id 0 Lun: 3 Attached scsi disk sdm State: running Current Portal: 192.168.2.200:3260,1 Persistent Portal: 192.168.2.200:3260,1 ********** Interface: ********** Iface Name: default Iface Transport: tcp Iface Initiatorname: iqn.1994-05.com.redhat:61d32512355 Iface IPaddress: 192.168.2.100 Iface HWaddress: Iface Netdev: SID: 2 iSCSI Connection State: LOGGED IN iSCSI Session State: LOGGED_IN Internal iscsid Session State: NO CHANGE ********* Timeouts: ********* Recovery Timeout: 120 Target Reset Timeout: 30 LUN Reset Timeout: 30 Abort Timeout: 15 ***** CHAP: ***** username: password: ******** username_in: password_in: ******** ************************ Negotiated iSCSI params: ************************ HeaderDigest: None DataDigest: None MaxRecvDataSegmentLength: 262144 MaxXmitDataSegmentLength: 131072 FirstBurstLength: 262144 MaxBurstLength: 262144 ImmediateData: No InitialR2T: Yes MaxOutstandingR2T: 1 ************************ Attached SCSI devices: ************************ Host Number: 5 State: running scsi5 Channel 00 Id 0 Lun: 0 Attached scsi disk sdf State: running scsi5 Channel 00 Id 0 Lun: 1 Attached scsi disk sdh State: running scsi5 Channel 00 Id 0 Lun: 2 Attached scsi disk sdi State: running scsi5 Channel 00 Id 0 Lun: 3 Attached scsi disk sdl State: running [root@raclhr-12cR1-N1 ~]#
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登陸之后要對新磁盤進行分區，格式化，然后在掛載即可
完成這些命令后，iscsi initator會把這些信息記錄到/var/lib/iscsi目錄下：
/var/lib/iscsi/send_targets記錄了各個target的情況，/var/lib/iscsi/nodes記錄了各個target下的nodes情況。下次再啟動iscsi initator時（service iscsi start)，就會自動登陸各個target上。如果想讓重新手工登陸各個target，需要把/var/lib/iscsi/send_targets目錄下的內容和/var/lib/iscsi/nodes下的內容全部刪除掉。
1、安裝多路徑軟件包：
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[root@raclhr-12cR1-N1 ~]# mount /dev/sr0 /media/lhr/cdrom/ mount: block device /dev/sr0 is write-protected, mounting read-only [root@raclhr-12cR1-N1 ~]# cd /media/lhr/cdrom/Packages/ [root@raclhr-12cR1-N1 Packages]# ll device-mapper-*.x86_64.rpm -r--r--r-- 104 root root 168424 Oct 30 2013 device-mapper-1.02.79-8.el6.x86_64.rpm -r--r--r-- 104 root root 118316 Oct 30 2013 device-mapper-event-1.02.79-8.el6.x86_64.rpm -r--r--r-- 104 root root 112892 Oct 30 2013 device-mapper-event-libs-1.02.79-8.el6.x86_64.rpm -r--r--r-- 104 root root 199924 Oct 30 2013 device-mapper-libs-1.02.79-8.el6.x86_64.rpm -r--r--r-- 95 root root 118892 Oct 25 2013 device-mapper-multipath-0.4.9-72.el6.x86_64.rpm -r--r--r-- 95 root root 184760 Oct 25 2013 device-mapper-multipath-libs-0.4.9-72.el6.x86_64.rpm -r--r--r-- 96 root root 2444388 Oct 30 2013 device-mapper-persistent-data-0.2.8-2.el6.x86_64.rpm [root@raclhr-12cR1-N1 Packages]# ll iscsi* -r--r--r-- 101 root root 702300 Oct 29 2013 iscsi-initiator-utils-6.2.0.873-10.el6.x86_64.rpm [root@raclhr-12cR1-N1 Packages]# rpm -qa|grep device-mapper device-mapper-persistent-data-0.2.8-2.el6.x86_64 device-mapper-1.02.79-8.el6.x86_64 device-mapper-event-libs-1.02.79-8.el6.x86_64 device-mapper-event-1.02.79-8.el6.x86_64 device-mapper-libs-1.02.79-8.el6.x86_64 [root@raclhr-12cR1-N1 Packages]# rpm -ivh device-mapper-1.02.79-8.el6.x86_64.rpm warning: device-mapper-1.02.79-8.el6.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID fd431d51: NOKEY Preparing... ########################################### [100%] package device-mapper-1.02.79-8.el6.x86_64 is already installed [root@raclhr-12cR1-N1 Packages]# rpm -ivh device-mapper-event-1.02.79-8.el6.x86_64.rpm warning: device-mapper-event-1.02.79-8.el6.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID fd431d51: NOKEY Preparing... ########################################### [100%] package device-mapper-event-1.02.79-8.el6.x86_64 is already installed [root@raclhr-12cR1-N1 Packages]# rpm -ivh device-mapper-multipath-0.4.9-72.el6.x86_64.rpm warning: device-mapper-multipath-0.4.9-72.el6.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID fd431d51: NOKEY error: Failed dependencies: device-mapper-multipath-libs = 0.4.9-72.el6 is needed by device-mapper-multipath-0.4.9-72.el6.x86_64 libmpathpersist.so.0()(64bit) is needed by device-mapper-multipath-0.4.9-72.el6.x86_64 libmultipath.so()(64bit) is needed by device-mapper-multipath-0.4.9-72.el6.x86_64 [root@raclhr-12cR1-N1 Packages]# rpm -ivh device-mapper-multipath-libs-0.4.9-72.el6.x86_64.rpm warning: device-mapper-multipath-libs-0.4.9-72.el6.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID fd431d51: NOKEY Preparing... ########################################### [100%] 1:device-mapper-multipath########################################### [100%] [root@raclhr-12cR1-N1 Packages]# rpm -ivh device-mapper-multipath-0.4.9-72.el6.x86_64.rpm warning: device-mapper-multipath-0.4.9-72.el6.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID fd431d51: NOKEY Preparing... ########################################### [100%] 1:device-mapper-multipath########################################### [100%] [root@raclhr-12cR1-N1 Packages]# rpm -qa|grep device-mapper device-mapper-multipath-0.4.9-72.el6.x86_64 device-mapper-persistent-data-0.2.8-2.el6.x86_64 device-mapper-1.02.79-8.el6.x86_64 device-mapper-event-libs-1.02.79-8.el6.x86_64 device-mapper-event-1.02.79-8.el6.x86_64 device-mapper-multipath-libs-0.4.9-72.el6.x86_64 device-mapper-libs-1.02.79-8.el6.x86_64 [root@raclhr-12cR1-N2 Packages]#
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rpm -ivh device-mapper-multipath-libs-0.4.9-72.el6.x86_64.rpm rpm -ivh device-mapper-multipath-0.4.9-72.el6.x86_64.rpm
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將多路徑軟件添加至內核模塊中
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modprobe dm-multipath modprobe dm-round-robin
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檢查內核添加情況
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[root@raclhr-12cR1-N1 Packages]# lsmod |grep multipath dm_multipath 17724 1 dm_round_robin dm_mod 84209 16 dm_multipath,dm_mirror,dm_log [root@raclhr-12cR1-N1 Packages]# |
將多路徑軟件multipath設置為開機自啟動
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[root@raclhr-12cR1-N1 Packages]# chkconfig --level 2345 multipathd on [root@raclhr-12cR1-N1 Packages]# [root@raclhr-12cR1-N1 Packages]# chkconfig --list|grep multipathd multipathd 0:off 1:off 2:on 3:on 4:on 5:on 6:off [root@raclhr-12cR1-N1 Packages]# |
啟動multipath服務
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[root@raclhr-12cR1-N1 Packages]# service multipathd restart ux_socket_connect: No such file or directory Stopping multipathd daemon: [FAILED] Starting multipathd daemon: [ OK ] [root@raclhr-12cR1-N1 Packages]# |
1、配置multipath軟件，編輯/etc/multipath.conf
注意:默認情況下，/etc/multipath.conf是不存在的，需要用如下命令生成multipath.conf文件:
/sbin/mpathconf --enable --find_multipaths y --with_module y --with_chkconfig y
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[root@raclhr-12cR1-N1 ~]# multipath -ll Jan 23 12:52:54 | /etc/multipath.conf does not exist, blacklisting all devices. Jan 23 12:52:54 | A sample multipath.conf file is located at Jan 23 12:52:54 | /usr/share/doc/device-mapper-multipath-0.4.9/multipath.conf Jan 23 12:52:54 | You can run /sbin/mpathconf to create or modify /etc/multipath.conf [root@raclhr-12cR1-N1 ~]# multipath -ll Jan 23 12:53:49 | /etc/multipath.conf does not exist, blacklisting all devices. Jan 23 12:53:49 | A sample multipath.conf file is located at Jan 23 12:53:49 | /usr/share/doc/device-mapper-multipath-0.4.9/multipath.conf Jan 23 12:53:49 | You can run /sbin/mpathconf to create or modify /etc/multipath.conf [root@raclhr-12cR1-N1 ~]# /sbin/mpathconf --enable --find_multipaths y --with_module y --with_chkconfig y [root@raclhr-12cR1-N1 ~]# [root@raclhr-12cR1-N1 ~]# ll /etc/multipath.conf -rw------- 1 root root 2775 Jan 23 12:55 /etc/multipath.conf [root@raclhr-12cR1-N1 ~]#
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2、查看并獲取存儲分配給服務器的邏輯盤lun的wwid信息
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[root@raclhr-12cR1-N1 multipath]# multipath -v0 [root@raclhr-12cR1-N1 multipath]# more /etc/multipath/wwids # Multipath wwids, Version : 1.0 # NOTE: This file is automatically maintained by multipath and multipathd. # You should not need to edit this file in normal circumstances. # # Valid WWIDs: /14f504e46494c455232326c6c76442d4361634f2d4d4f4d41/ /14f504e46494c455242674c7079392d753750482d63734443/ /14f504e46494c455233384b7353432d52454b4c2d79506757/ /14f504e46494c4552614e35626c6f2d4e794d702d4c344a6c/ [root@raclhr-12cR1-N1 multipath]#
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將文件/etc/multipath/wwids和/etc/multipath/bindings的內容覆蓋節點2：
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[root@raclhr-12cR1-N2 ~]# multipath -v0 [root@raclhr-12cR1-N2 ~]# more /etc/multipath/wwids # Multipath wwids, Version : 1.0 # NOTE: This file is automatically maintained by multipath and multipathd. # You should not need to edit this file in normal circumstances. # # Valid WWIDs: /14f504e46494c455232326c6c76442d4361634f2d4d4f4d41/ /14f504e46494c455242674c7079392d753750482d63734443/ /14f504e46494c455233384b7353432d52454b4c2d79506757/ /14f504e46494c4552614e35626c6f2d4e794d702d4c344a6c/ [root@raclhr-12cR1-N1 ~]# more /etc/multipath/bindings # Multipath bindings, Version : 1.0 # NOTE: this file is automatically maintained by the multipath program. # You should not need to edit this file in normal circumstances. # # Format: # alias wwid # mpatha 14f504e46494c455232326c6c76442d4361634f2d4d4f4d41 mpathb 14f504e46494c455242674c7079392d753750482d63734443 mpathc 14f504e46494c455233384b7353432d52454b4c2d79506757 mpathd 14f504e46494c4552614e35626c6f2d4e794d702d4c344a6c [root@raclhr-12cR1-N1 ~]#
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[root@raclhr-12cR1-N2 ~]# [root@raclhr-12cR1-N1 multipath]# multipath -ll mpathd (14f504e46494c4552614e35626c6f2d4e794d702d4c344a6c) dm-9 OPNFILER,VIRTUAL-DISK size=10G features='0' hwhandler='0' wp=rw |-+- policy='round-robin 0' prio=1 status=active | `- 5:0:0:3 sdk 8:160 active ready running `-+- policy='round-robin 0' prio=1 status=enabled `- 4:0:0:3 sdm 8:192 active ready running mpathc (14f504e46494c455233384b7353432d52454b4c2d79506757) dm-8 OPNFILER,VIRTUAL-DISK size=10G features='0' hwhandler='0' wp=rw |-+- policy='round-robin 0' prio=1 status=active | `- 5:0:0:2 sdj 8:144 active ready running `-+- policy='round-robin 0' prio=1 status=enabled `- 4:0:0:2 sdl 8:176 active ready running mpathb (14f504e46494c455242674c7079392d753750482d63734443) dm-7 OPNFILER,VIRTUAL-DISK size=10G features='0' hwhandler='0' wp=rw |-+- policy='round-robin 0' prio=1 status=active | `- 4:0:0:1 sdh 8:112 active ready running `-+- policy='round-robin 0' prio=1 status=enabled `- 5:0:0:1 sdi 8:128 active ready running mpatha (14f504e46494c455232326c6c76442d4361634f2d4d4f4d41) dm-6 OPNFILER,VIRTUAL-DISK size=10G features='0' hwhandler='0' wp=rw |-+- policy='round-robin 0' prio=1 status=active | `- 4:0:0:0 sdf 8:80 active ready running `-+- policy='round-robin 0' prio=1 status=enabled `- 5:0:0:0 sdg 8:96 active ready running [root@raclhr-12cR1-N1 multipath]# fdisk -l | grep dev Disk /dev/sda: 21.5 GB, 21474836480 bytes /dev/sda1 * 1 26 204800 83 Linux /dev/sda2 26 1332 10485760 8e Linux LVM /dev/sda3 1332 2611 10279936 8e Linux LVM Disk /dev/sdb: 107.4 GB, 107374182400 bytes /dev/sdb1 1 1306 10485760 8e Linux LVM /dev/sdb2 1306 2611 10485760 8e Linux LVM /dev/sdb3 2611 3917 10485760 8e Linux LVM /dev/sdb4 3917 13055 73399296 5 Extended /dev/sdb5 3917 5222 10485760 8e Linux LVM /dev/sdb6 5223 6528 10485760 8e Linux LVM /dev/sdb7 6528 7834 10485760 8e Linux LVM /dev/sdb8 7834 9139 10485760 8e Linux LVM /dev/sdb9 9139 10445 10485760 8e Linux LVM /dev/sdb10 10445 11750 10485760 8e Linux LVM /dev/sdb11 11750 13055 10477568 8e Linux LVM Disk /dev/sdc: 6442 MB, 6442450944 bytes Disk /dev/sdd: 10.7 GB, 10737418240 bytes Disk /dev/sde: 10.7 GB, 10737418240 bytes Disk /dev/mapper/vg_rootlhr-Vol02: 2147 MB, 2147483648 bytes Disk /dev/mapper/vg_rootlhr-Vol00: 10.7 GB, 10737418240 bytes Disk /dev/mapper/vg_orasoft-lv_orasoft_u01: 21.5 GB, 21474836480 bytes Disk /dev/mapper/vg_orasoft-lv_orasoft_soft: 21.5 GB, 21474836480 bytes Disk /dev/mapper/vg_rootlhr-Vol01: 3221 MB, 3221225472 bytes Disk /dev/mapper/vg_rootlhr-Vol03: 3221 MB, 3221225472 bytes Disk /dev/sdf: 10.7 GB, 10737418240 bytes Disk /dev/sdg: 10.7 GB, 10737418240 bytes Disk /dev/sdh: 10.7 GB, 10737418240 bytes Disk /dev/sdi: 10.7 GB, 10737418240 bytes Disk /dev/sdj: 10.7 GB, 10737418240 bytes Disk /dev/sdk: 10.7 GB, 10737418240 bytes Disk /dev/sdl: 10.7 GB, 10737418240 bytes Disk /dev/sdm: 10.7 GB, 10737418240 bytes Disk /dev/mapper/mpatha: 10.7 GB, 10737418240 bytes Disk /dev/mapper/mpathb: 10.7 GB, 10737418240 bytes Disk /dev/mapper/mpathc: 10.7 GB, 10737418240 bytes Disk /dev/mapper/mpathd: 10.7 GB, 10737418240 bytes [root@raclhr-12cR1-N1 multipath]#
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for i in f g h i j k l m ; do echo "KERNEL==\"sd*\", BUS==\"scsi\", PROGRAM==\"/sbin/scsi_id --whitelisted --device=/dev/\$name\",RESULT==\"`scsi_id --whitelisted --device=/dev/sd$i`\",NAME=\"asm-disk$i\",OWNER=\"grid\",GROUP=\"asmadmin\",MODE=\"0660\"" done
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[root@raclhr-12cR1-N1 multipath]# for i in f g h i j k l m ; > do > echo "KERNEL==\"sd*\", BUS==\"scsi\", PROGRAM==\"/sbin/scsi_id --whitelisted --device=/dev/\$name\",RESULT==\"`scsi_id --whitelisted --device=/dev/sd$i`\",NAME=\"asm-disk$i\",OWNER=\"grid\",GROUP=\"asmadmin\",MODE=\"0660\"" > done KERNEL=="sd*", BUS=="scsi", PROGRAM=="/sbin/scsi_id --whitelisted --device=/dev/$name",RESULT=="14f504e46494c455232326c6c76442d4361634f2d4d4f4d41",NAME="asm-diskf",OWNER="grid",GROUP="asmadmin",MODE="0660" KERNEL=="sd*", BUS=="scsi", PROGRAM=="/sbin/scsi_id --whitelisted --device=/dev/$name",RESULT=="14f504e46494c455232326c6c76442d4361634f2d4d4f4d41",NAME="asm-diskg",OWNER="grid",GROUP="asmadmin",MODE="0660" KERNEL=="sd*", BUS=="scsi", PROGRAM=="/sbin/scsi_id --whitelisted --device=/dev/$name",RESULT=="14f504e46494c455242674c7079392d753750482d63734443",NAME="asm-diskh",OWNER="grid",GROUP="asmadmin",MODE="0660" KERNEL=="sd*", BUS=="scsi", PROGRAM=="/sbin/scsi_id --whitelisted --device=/dev/$name",RESULT=="14f504e46494c455242674c7079392d753750482d63734443",NAME="asm-diski",OWNER="grid",GROUP="asmadmin",MODE="0660" KERNEL=="sd*", BUS=="scsi", PROGRAM=="/sbin/scsi_id --whitelisted --device=/dev/$name",RESULT=="14f504e46494c455233384b7353432d52454b4c2d79506757",NAME="asm-diskj",OWNER="grid",GROUP="asmadmin",MODE="0660" KERNEL=="sd*", BUS=="scsi", PROGRAM=="/sbin/scsi_id --whitelisted --device=/dev/$name",RESULT=="14f504e46494c4552614e35626c6f2d4e794d702d4c344a6c",NAME="asm-diskk",OWNER="grid",GROUP="asmadmin",MODE="0660" KERNEL=="sd*", BUS=="scsi", PROGRAM=="/sbin/scsi_id --whitelisted --device=/dev/$name",RESULT=="14f504e46494c455233384b7353432d52454b4c2d79506757",NAME="asm-diskl",OWNER="grid",GROUP="asmadmin",MODE="0660" KERNEL=="sd*", BUS=="scsi", PROGRAM=="/sbin/scsi_id --whitelisted --device=/dev/$name",RESULT=="14f504e46494c4552614e35626c6f2d4e794d702d4c344a6c",NAME="asm-diskm",OWNER="grid",GROUP="asmadmin",MODE="0660" [root@raclhr-12cR1-N1 multipath]# [root@raclhr-12cR1-N1 multipath]# more /etc/multipath.conf defaults { find_multipaths yes user_friendly_names yes }
blacklist { wwid 3600508b1001c5ae72efe1fea025cd2e5 devnode "^hd[a-z]" devnode "^sd[a-e]" devnode "^sda" }
multipaths { multipath { wwid 14f504e46494c455232326c6c76442d4361634f2d4d4f4d41 alias VMLHRStorage000 path_grouping_policy multibus path_selector "round-robin 0" failback manual rr_weight priorities no_path_retry 5 } multipath { wwid 14f504e46494c455242674c7079392d753750482d63734443 alias VMLHRStorage001 path_grouping_policy multibus path_selector "round-robin 0" failback manual rr_weight priorities no_path_retry 5 } multipath { wwid 14f504e46494c455233384b7353432d52454b4c2d79506757 alias VMLHRStorage002 path_grouping_policy multibus path_selector "round-robin 0" failback manual rr_weight priorities no_path_retry 5 } multipath { wwid 14f504e46494c4552614e35626c6f2d4e794d702d4c344a6c alias VMLHRStorage003 path_grouping_policy multibus path_selector "round-robin 0" failback manual rr_weight priorities no_path_retry 5 } } devices { device { vendor "VMWARE" product "VIRTUAL-DISK" path_grouping_policy multibus getuid_callout "/lib/udev/scsi_id --whitelisted --device=/dev/%n" path_checker readsector0 path_selector "round-robin 0" hardware_handler "0" failback 15 rr_weight priorities no_path_retry queue } } [root@raclhr-12cR1-N1 multipath]#
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啟動multipath配置
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[root@raclhr-12cR1-N1 ~]# service multipathd restart ok Stopping multipathd daemon: [ OK ] Starting multipathd daemon: [ OK ] [root@raclhr-12cR1-N1 ~]# multipath -ll VMLHRStorage003 (14f504e46494c4552614e35626c6f2d4e794d702d4c344a6c) dm-9 OPNFILER,VIRTUAL-DISK size=10G features='1 queue_if_no_path' hwhandler='0' wp=rw |-+- policy='round-robin 0' prio=1 status=active | `- 5:0:0:3 sdk 8:160 active ready running `-+- policy='round-robin 0' prio=1 status=enabled `- 4:0:0:3 sdm 8:192 active ready running VMLHRStorage002 (14f504e46494c455233384b7353432d52454b4c2d79506757) dm-8 OPNFILER,VIRTUAL-DISK size=10G features='1 queue_if_no_path' hwhandler='0' wp=rw |-+- policy='round-robin 0' prio=1 status=active | `- 5:0:0:2 sdj 8:144 active ready running `-+- policy='round-robin 0' prio=1 status=enabled `- 4:0:0:2 sdl 8:176 active ready running VMLHRStorage001 (14f504e46494c455242674c7079392d753750482d63734443) dm-7 OPNFILER,VIRTUAL-DISK size=10G features='1 queue_if_no_path' hwhandler='0' wp=rw |-+- policy='round-robin 0' prio=1 status=active | `- 4:0:0:1 sdh 8:112 active ready running `-+- policy='round-robin 0' prio=1 status=enabled `- 5:0:0:1 sdi 8:128 active ready running VMLHRStorage000 (14f504e46494c455232326c6c76442d4361634f2d4d4f4d41) dm-6 OPNFILER,VIRTUAL-DISK size=10G features='1 queue_if_no_path' hwhandler='0' wp=rw |-+- policy='round-robin 0' prio=1 status=active | `- 4:0:0:0 sdf 8:80 active ready running `-+- policy='round-robin 0' prio=1 status=enabled `- 5:0:0:0 sdg 8:96 active ready running [root@raclhr-12cR1-N1 ~]# [root@raclhr-12cR1-N1 ~]# multipath -ll|grep LHR VMLHRStorage003 (14f504e46494c4552614e35626c6f2d4e794d702d4c344a6c) dm-9 OPNFILER,VIRTUAL-DISK VMLHRStorage002 (14f504e46494c455233384b7353432d52454b4c2d79506757) dm-8 OPNFILER,VIRTUAL-DISK VMLHRStorage001 (14f504e46494c455242674c7079392d753750482d63734443) dm-7 OPNFILER,VIRTUAL-DISK VMLHRStorage000 (14f504e46494c455232326c6c76442d4361634f2d4d4f4d41) dm-6 OPNFILER,VIRTUAL-DISK [root@raclhr-12cR1-N1 ~]#
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啟用multipath配置后,會在/dev/mapper下生成多路徑邏輯盤
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[root@raclhr-12cR1-N1 ~]# cd /dev/mapper [root@raclhr-12cR1-N1 mapper]# ll total 0 crw-rw---- 1 root root 10, 58 Jan 23 12:49 control lrwxrwxrwx 1 root root 7 Jan 23 12:49 vg_orasoft-lv_orasoft_soft -> ../dm-3 lrwxrwxrwx 1 root root 7 Jan 23 12:49 vg_orasoft-lv_orasoft_u01 -> ../dm-2 lrwxrwxrwx 1 root root 7 Jan 23 12:50 vg_rootlhr-Vol00 -> ../dm-1 lrwxrwxrwx 1 root root 7 Jan 23 12:50 vg_rootlhr-Vol01 -> ../dm-4 lrwxrwxrwx 1 root root 7 Jan 23 12:49 vg_rootlhr-Vol02 -> ../dm-0 lrwxrwxrwx 1 root root 7 Jan 23 12:50 vg_rootlhr-Vol03 -> ../dm-5 lrwxrwxrwx 1 root root 7 Jan 23 13:55 VMLHRStorage000 -> ../dm-6 lrwxrwxrwx 1 root root 7 Jan 23 13:55 VMLHRStorage001 -> ../dm-7 lrwxrwxrwx 1 root root 7 Jan 23 13:55 VMLHRStorage002 -> ../dm-8 lrwxrwxrwx 1 root root 7 Jan 23 13:55 VMLHRStorage003 -> ../dm-9 [root@raclhr-12cR1-N1 mapper]#
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至此，多路徑multipath配置完成。
在6.2之前配置multipath設備的權限只需要在設備配置里增加uid,gid,mode就可以
uid 1100 #uid
gid 1020 #gid
如：
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multipath { wwid 360050763008101d4e00000000000000a alias DATA03 uid 501 #uid gid 501 #gid }
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在6.2之后配置multipath配置文件里去掉uid,gid,mode這三個參數，需要使用udev使用,示例文件在/usr/share/doc/device-mapper-version中有一個模板文件,名為12-dm-permissions.rules,您可以使用它并將其放在 /etc/udev/rules.d 目錄中使其生效。
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[root@raclhr-12cR1-N1 rules.d]# ll /usr/share/doc/device-mapper-1.02.79/12-dm-permissions.rules -rw-r--r--. 1 root root 3186 Aug 13 2013 /usr/share/doc/device-mapper-1.02.79/12-dm-permissions.rules [root@raclhr-12cR1-N1 rules.d]# [root@raclhr-12cR1-N1 rules.d]# ll total 24 -rw-r--r-- 1 root root 77 Jan 23 18:06 12-dm-permissions.rules -rw-r--r-- 1 root root 190 Jan 23 15:40 55-usm.rules -rw-r--r-- 1 root root 549 Jan 23 15:17 70-persistent-cd.rules -rw-r--r-- 1 root root 585 Jan 23 15:09 70-persistent-net.rules -rw-r--r-- 1 root root 633 Jan 23 15:46 99-oracle-asmdevices.rules -rw-r--r-- 1 root root 916 Jan 23 15:16 99-oracleasm.rules [root@raclhr-12cR1-N1 rules.d]# more /etc/udev/rules.d/12-dm-permissions.rules ENV{DM_NAME}=="VMLHRStorage*", OWNER:="grid", GROUP:="asmadmin", MODE:="660" [root@raclhr-12cR1-N1 rules.d]#
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將文件/etc/udev/rules.d/12-dm-permissions.rules復制到節點2上。
腳本如下所示：
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for i in f g h i j k l m ; do echo "KERNEL==\"dm-*\", BUS==\"block\", PROGRAM==\"/sbin/scsi_id --whitelisted --replace-whitespace --device=/dev/\$name\",RESULT==\"`scsi_id --whitelisted --replace-whitespace --device=/dev/sd$i`\",NAME=\"asm-disk$i\",OWNER=\"grid\",GROUP=\"asmadmin\",MODE=\"0660\"" >> /etc/udev/rules.d/99-oracleasm.rules done
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由于多路徑的設置WWID有重復，所以應該去掉文件/etc/udev/rules.d/99-oracleasm.rules中的重復的行。
在節點1執行以下操作：
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[root@raclhr-12cR1-N1 rules.d]# for i in f g h i j k l m ; > do > echo "KERNEL==\"dm-*\", BUS==\"block\", PROGRAM==\"/sbin/scsi_id --whitelisted --replace-whitespace --device=/dev/\$name\",RESULT==\"`scsi_id --whitelisted --replace-whitespace --device=/dev/sd$i`\",NAME=\"asm-disk$i\",OWNER=\"grid\",GROUP=\"asmadmin\",MODE=\"0660\"" >> /etc/udev/rules.d/99-oracleasm.rules > done
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打開文件/etc/udev/rules.d/99-oracleasm.rules，去掉WWID重復的行只保留一行即可。
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[root@raclhr-12cR1-N1 ~]# cat /etc/udev/rules.d/99-oracleasm.rules KERNEL=="dm-*", BUS=="block", PROGRAM=="/sbin/scsi_id --whitelisted --replace-whitespace --device=/dev/$name",RESULT=="14f504e46494c455232326c6c76442d4361634f2d4d4f4d41",NAME="asm-diskf",OWNER="grid",GROUP="asmadmin",MODE="0660" KERNEL=="dm-*", BUS=="block", PROGRAM=="/sbin/scsi_id --whitelisted --replace-whitespace --device=/dev/$name",RESULT=="14f504e46494c455242674c7079392d753750482d63734443",NAME="asm-diskh",OWNER="grid",GROUP="asmadmin",MODE="0660" KERNEL=="dm-*", BUS=="block", PROGRAM=="/sbin/scsi_id --whitelisted --replace-whitespace --device=/dev/$name",RESULT=="14f504e46494c455233384b7353432d52454b4c2d79506757",NAME="asm-diskj",OWNER="grid",GROUP="asmadmin",MODE="0660" KERNEL=="dm-*", BUS=="block", PROGRAM=="/sbin/scsi_id --whitelisted --replace-whitespace --device=/dev/$name",RESULT=="14f504e46494c4552614e35626c6f2d4e794d702d4c344a6c",NAME="asm-diskk",OWNER="grid",GROUP="asmadmin",MODE="0660" [root@raclhr-12cR1-N1 ~]#
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將文件/etc/udev/rules.d/99-oracleasm.rules的內容拷貝到節點2，然后重啟udev。
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[root@raclhr-12cR1-N1 ~]# start_udev Starting udev: [ OK ] [root@raclhr-12cR1-N1 ~]# [root@raclhr-12cR1-N1 ~]# ll /dev/asm-* brw-rw---- 1 grid asmadmin 8, 32 Jan 23 15:50 /dev/asm-diskc brw-rw---- 1 grid asmadmin 8, 48 Jan 23 15:48 /dev/asm-diskd brw-rw---- 1 grid asmadmin 8, 64 Jan 23 15:48 /dev/asm-diske brw-rw---- 1 grid asmadmin 253, 7 Jan 23 15:46 /dev/asm-diskf brw-rw---- 1 grid asmadmin 253, 9 Jan 23 15:46 /dev/asm-diskh brw-rw---- 1 grid asmadmin 253, 6 Jan 23 15:46 /dev/asm-diskj brw-rw---- 1 grid asmadmin 253, 8 Jan 23 15:46 /dev/asm-diskk [root@raclhr-12cR1-N1 ~]# [grid@raclhr-12cR1-N1 ~]$ $ORACLE_HOME/bin/kfod disks=all s=true ds=true -------------------------------------------------------------------------------- Disk Size Header Path Disk Group User Group ================================================================================ 1: 6144 Mb MEMBER /dev/asm-diskc OCR grid asmadmin 2: 10240 Mb MEMBER /dev/asm-diskd DATA grid asmadmin 3: 10240 Mb MEMBER /dev/asm-diske FRA grid asmadmin 4: 10240 Mb CANDIDATE /dev/asm-diskf # grid asmadmin 5: 10240 Mb CANDIDATE /dev/asm-diskh # grid asmadmin 6: 10240 Mb CANDIDATE /dev/asm-diskj # grid asmadmin 7: 10240 Mb CANDIDATE /dev/asm-diskk # grid asmadmin -------------------------------------------------------------------------------- ORACLE_SID ORACLE_HOME ================================================================================ +ASM2 /u01/app/12.1.0/grid +ASM1 /u01/app/12.1.0/grid [grid@raclhr-12cR1-N1 ~]$ asmcmd
ASMCMD> lsdg State Type Rebal Sector Block AU Total_MB Free_MB Req_mir_free_MB Usable_file_MB Offline_disks Voting_files Name MOUNTED EXTERN N 512 4096 1048576 10240 6487 0 6487 0 N DATA/ MOUNTED EXTERN N 512 4096 1048576 10240 10144 0 10144 0 N FRA/ MOUNTED EXTERN N 512 4096 1048576 6144 1672 0 1672 0 Y OCR/ ASMCMD> lsdsk Path /dev/asm-diskc /dev/asm-diskd /dev/asm-diske ASMCMD> lsdsk --candidate -p Group_Num Disk_Num Incarn Mount_Stat Header_Stat Mode_Stat State Path 0 1 0 CLOSED CANDIDATE ONLINE NORMAL /dev/asm-diskf 0 3 0 CLOSED CANDIDATE ONLINE NORMAL /dev/asm-diskh 0 2 0 CLOSED CANDIDATE ONLINE NORMAL /dev/asm-diskj 0 0 0 CLOSED CANDIDATE ONLINE NORMAL /dev/asm-diskk ASMCMD>
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CREATE DISKGROUP FRA external redundancy DISK '/dev/asm-diskf','/dev/asm-diskh' ATTRIBUTE 'compatible.rdbms' = '12.1', 'compatible.asm' = '12.1';
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SQL> select path from v$asm_disk;
PATH -------------------------------------------------------------------------------- /dev/asm-diskk /dev/asm-diskf /dev/asm-diskj /dev/asm-diskh /dev/asm-diske /dev/asm-diskd /dev/asm-diskc
7 rows selected.
SQL> CREATE DISKGROUP TESTMUL external redundancy DISK '/dev/asm-diskf','/dev/asm-diskh' ATTRIBUTE 'compatible.rdbms' = '12.1', 'compatible.asm' = '12.1';
Diskgroup created.
SQL> ASMCMD> lsdg State Type Rebal Sector Block AU Total_MB Free_MB Req_mir_free_MB Usable_file_MB Offline_disks Voting_files Name MOUNTED EXTERN N 512 4096 1048576 10240 6487 0 6487 0 N DATA/ MOUNTED EXTERN N 512 4096 1048576 10240 10144 0 10144 0 N FRA/ MOUNTED EXTERN N 512 4096 1048576 6144 1672 0 1672 0 Y OCR/ MOUNTED EXTERN N 512 4096 1048576 20480 20381 0 20381 0 N TESTMUL/ ASMCMD>
[root@raclhr-12cR1-N1 ~]# crsctl stat res -t | grep -2 TESTMUL ONLINE ONLINE raclhr-12cr1-n1 STABLE ONLINE ONLINE raclhr-12cr1-n2 STABLE ora.TESTMUL.dg ONLINE ONLINE raclhr-12cr1-n1 STABLE ONLINE ONLINE raclhr-12cr1-n2 STABLE [root@raclhr-12cR1-N1 ~]#
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[oracle@raclhr-12cR1-N1 ~]$ sqlplus / as sysdba
SQL*Plus: Release 12.1.0.2.0 Production on Mon Jan 23 16:17:28 2017
Copyright (c) 1982, 2014, Oracle. All rights reserved.
Connected to: Oracle Database 12c Enterprise Edition Release 12.1.0.2.0 - 64bit Production With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP, Advanced Analytics and Real Application Testing options
SQL> create tablespace TESTMUL datafile '+TESTMUL' size 10M;
Tablespace created.
SQL> select name from v$datafile;
NAME -------------------------------------------------------------------------------- +DATA/LHRRAC/DATAFILE/system.258.933550527 +DATA/LHRRAC/DATAFILE/undotbs2.269.933551323 +DATA/LHRRAC/DATAFILE/sysaux.257.933550483 +DATA/LHRRAC/DATAFILE/undotbs1.260.933550575 +DATA/LHRRAC/DATAFILE/example.268.933550723 +DATA/LHRRAC/DATAFILE/users.259.933550573 +TESTMUL/LHRRAC/DATAFILE/testmul.256.934042679
7 rows selected.
SQL>
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將存儲停掉一塊網卡eth2：
|
[root@OFLHR ~]# ip a 1: lo: mtu 16436 qdisc noqueue link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: eth0: mtu 1500 qdisc pfifo_fast qlen 1000 link/ether 00:0c:29:98:1a:cd brd ff:ff:ff:ff:ff:ff inet 192.168.59.200/24 brd 192.168.59.255 scope global eth0 inet6 fe80::20c:29ff:fe98:1acd/64 scope link valid_lft forever preferred_lft forever 3: eth2: mtu 1500 qdisc pfifo_fast qlen 1000 link/ether 00:0c:29:98:1a:d7 brd ff:ff:ff:ff:ff:ff inet 192.168.2.200/24 brd 192.168.2.255 scope global eth2 inet6 fe80::20c:29ff:fe98:1ad7/64 scope link valid_lft forever preferred_lft forever [root@OFLHR ~]# ifconfig eth2 down [root@OFLHR ~]# ip a 1: lo: mtu 16436 qdisc noqueue link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: eth0: mtu 1500 qdisc pfifo_fast qlen 1000 link/ether 00:0c:29:98:1a:cd brd ff:ff:ff:ff:ff:ff inet 192.168.59.200/24 brd 192.168.59.255 scope global eth0 inet6 fe80::20c:29ff:fe98:1acd/64 scope link valid_lft forever preferred_lft forever 3: eth2: mtu 1500 qdisc pfifo_fast qlen 1000 link/ether 00:0c:29:98:1a:d7 brd ff:ff:ff:ff:ff:ff inet 192.168.2.200/24 brd 192.168.2.255 scope global eth2 [root@OFLHR ~]#
|
rac節點查看日志：
|
[root@raclhr-12cR1-N1 ~]# tail -f /var/log/messages Jan 23 16:20:51 raclhr-12cR1-N1 iscsid: connect to 192.168.2.200:3260 failed (No route to host) Jan 23 16:20:57 raclhr-12cR1-N1 iscsid: connect to 192.168.2.200:3260 failed (No route to host) Jan 23 16:21:03 raclhr-12cR1-N1 iscsid: connect to 192.168.2.200:3260 failed (No route to host) [root@raclhr-12cR1-N1 ~]# multipath -ll VMLHRStorage003 (14f504e46494c4552614e35626c6f2d4e794d702d4c344a6c) dm-8 OPNFILER,VIRTUAL-DISK size=10G features='1 queue_if_no_path' hwhandler='0' wp=rw `-+- policy='round-robin 0' prio=1 status=active |- 5:0:0:3 sdm 8:192 failed faulty running `- 4:0:0:3 sdl 8:176 active ready running VMLHRStorage002 (14f504e46494c455233384b7353432d52454b4c2d79506757) dm-9 OPNFILER,VIRTUAL-DISK size=10G features='1 queue_if_no_path' hwhandler='0' wp=rw `-+- policy='round-robin 0' prio=1 status=active |- 5:0:0:2 sdj 8:144 failed faulty running `- 4:0:0:2 sdk 8:160 active ready running VMLHRStorage001 (14f504e46494c455242674c7079392d753750482d63734443) dm-7 OPNFILER,VIRTUAL-DISK size=10G features='1 queue_if_no_path' hwhandler='0' wp=rw `-+- policy='round-robin 0' prio=1 status=active |- 4:0:0:1 sdi 8:128 active ready running `- 5:0:0:1 sdh 8:112 failed faulty running VMLHRStorage000 (14f504e46494c455232326c6c76442d4361634f2d4d4f4d41) dm-6 OPNFILER,VIRTUAL-DISK size=10G features='1 queue_if_no_path' hwhandler='0' wp=rw `-+- policy='round-robin 0' prio=1 status=active |- 4:0:0:0 sdf 8:80 active ready running `- 5:0:0:0 sdg 8:96 failed faulty running [root@raclhr-12cR1-N1 ~]#
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表空間可以正常訪問：
|
SQL> create table tt tablespace TESTMUL as select * from dual;
Table created.
SQL> select * from tt;
D - X
SQL>
|
同理，將eth2進行up，而將eth0宕掉，表空間依然正常。重啟集群和存儲后，集群一切正常。
重新搭建一套多路徑的環境來測試多路徑。
最簡單的測試方法，是用dd往磁盤讀寫數據，然后用iostat觀察各通道的流量和狀態，以判斷Failover或負載均衡方式是否正常：
# dd if=/dev/zero of=/dev/mapper/mpath0
# iostat -k 2
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[root@orcltest ~]# multipath -ll VMLHRStorage003 (14f504e46494c4552674a61727a472d523449782d5336784e) dm-3 OPNFILER,VIRTUAL-DISK size=10G features='1 queue_if_no_path' hwhandler='0' wp=rw `-+- policy='round-robin 0' prio=1 status=active |- 35:0:0:2 sdf 8:80 active ready running `- 36:0:0:2 sdg 8:96 active ready running VMLHRStorage002 (14f504e46494c4552506a5a5954422d6f6f4e652d34423171) dm-2 OPNFILER,VIRTUAL-DISK size=10G features='1 queue_if_no_path' hwhandler='0' wp=rw `-+- policy='round-robin 0' prio=1 status=active |- 35:0:0:3 sdh 8:112 active ready running `- 36:0:0:3 sdi 8:128 active ready running VMLHRStorage001 (14f504e46494c4552324b583573332d774e5a622d696d7334) dm-1 OPNFILER,VIRTUAL-DISK size=10G features='1 queue_if_no_path' hwhandler='0' wp=rw `-+- policy='round-robin 0' prio=1 status=active |- 35:0:0:1 sdd 8:48 active ready running `- 36:0:0:1 sde 8:64 active ready running VMLHRStorage000 (14f504e46494c45523431576859532d643246412d5154564f) dm-0 OPNFILER,VIRTUAL-DISK size=10G features='1 queue_if_no_path' hwhandler='0' wp=rw `-+- policy='round-robin 0' prio=1 status=active |- 35:0:0:0 sdb 8:16 active ready running `- 36:0:0:0 sdc 8:32 active ready running [root@orcltest ~]# dd if=/dev/zero of=/dev/mapper/VMLHRStorage001
|
重新開一個窗口執行iostat -k 2可以看到：
|
avg-cpu: %user %nice %system %iowait %steal %idle 0.00 0.00 5.23 20.78 0.00 73.99
Device: tps kB_read/s kB_wrtn/s kB_read kB_wrtn sda 9.00 0.00 92.00 0 184 scd0 0.00 0.00 0.00 0 0 sdb 0.00 0.00 0.00 0 0 sdc 0.00 0.00 0.00 0 0 sdd 1197.50 4704.00 10886.00 9408 21772 sde 1197.50 4708.00 10496.00 9416 20992 sdh 0.00 0.00 0.00 0 0 sdi 0.00 0.00 0.00 0 0 sdf 0.00 0.00 0.00 0 0 sdg 0.00 0.00 0.00 0 0 dm-0 0.00 0.00 0.00 0 0 dm-4 0.00 0.00 0.00 0 0 dm-10 0.00 0.00 0.00 0 0 dm-1 2395.00 9412.00 21382.00 18824 42764 dm-2 0.00 0.00 0.00 0 0 dm-3 0.00 0.00 0.00 0 0 dm-5 0.00 0.00 0.00 0 0 dm-6 0.00 0.00 0.00 0 0 dm-7 0.00 0.00 0.00 0 0 dm-8 0.00 0.00 0.00 0 0 dm-9 0.00 0.00 0.00 0 0
|
用multipath生成映射后，會在/dev目錄下產生多個指向同一條鏈路的設備：
|
/dev/mapper/mpathn /dev/mpath/mpathn /dev/dm-n |
但它們的來源是完全不同的：
/dev/mapper/mpathn 是multipath虛擬出來的多路徑設備，我們應該使用這個設備；/dev/mapper 中的設備是在引導過程中生成的。可使用這些設備訪問多路徑設備，例如在生成邏輯卷時。
/dev/mpath/mpathn 是udev設備管理器創建的，實際上就是指向下面的dm-n設備，僅為了方便，不能用來掛載；提供 /dev/mpath 中的設備是為了方便，這樣可在一個目錄中看到所有多路徑設備。這些設備是由 udev 設備管理器生成的，且在系統需要訪問它們時不一定能啟動。請不要使用這些設備生成邏輯卷或者文件系統。
/dev/dm-n 是軟件內部自身使用的，不能被軟件以外使用，不可掛載。所有 /dev/dm-n 格式的設備都只能是作為內部使用，且應該永遠不要使用。
簡單來說，就是我們應該使用/dev/mapper/下的設備符。對該設備即可用fdisk進行分區，或創建為pv。
好了，有關使用OpenFiler來模擬存儲配置RAC中ASM共享盤及多路徑的測試就到此為止了。2016年結束了，今天是1月23日，明天是1月24日，小麥苗回家過年了，O(∩_∩)O~。在此也祝福各位網友和朋友身體健康，萬事如意，合家歡樂，生活美滿，事業有成，珠玉滿堂，多壽多富，財大氣粗，攻無不克，戰無不勝!
About Me
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● 本文作者：小麥苗，只專注于數據庫的技術，更注重技術的運用
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