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使用OpenFiler来模拟存储配置RAC中ASM共享盘及多路径(multipath)的测试

简介: 第一章 本篇总览   之前发布了一篇《Oracle_lhr_RAC 12cR1安装》,但是其中的存储并没有使用多路径,而是使用了VMware自身提供的存储。
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第一章 本篇总览

 

之前发布了一篇《Oracle_lhr_RAC 12cR1安装》,但是其中的存储并没有使用多路径,而是使用了VMware自身提供的存储。所以,年前最后一件事就是把多路径学习一下,本文介绍了OpenFiler、iSCSI和多路径的配置。

本文内容:

wpsE474.tmp 

 

第二章 安装OpenFiler

OpenFile是在rPath Linux基础上开发的,它能够作为一个独立的Linux操作系统发行。Openfiler是一款非常好的存储管理操作系统,开源免费,通过web界面对存储磁盘的管理,支持现在流行的网络存储技术IP-SANNAS,支持iSCSINFSSMB/CIFSFTP等协议。

本次安装OpenFiler锁需要的软件如下所示:

序号

类型

内容

1

openfiler

openfileresa-2.99.1-x86_64-disc1.iso

注:这些软件小麦苗已上传到腾讯微云(http://blog.itpub.net/26736162/viewspace-1624453/),各位朋友可以去下载。另外,小麦苗已经将安装好的虚拟机上传到了云盘,里边已集成了rlwrap软件。

2.1  安装

详细安装过程小麦苗就不一个一个截图了,网上已经有网友贴出了一步一步的过程,OpenFiler的内存设置为1G大小或再小点也无所谓,磁盘选用IDE磁盘格式,由于后续要配置多路径,所以需要安装2块网卡。安装完成后,重新启动,界面如下所示:

wpsE475.tmp 

 

注意,方框中的内容,可以在浏览器中直接打开。可以用root用户登录进行用户的维护,若进行存储的维护则只能使用openfiler用户。openfiler是在远程使用Web界面进行管理的,小麦苗这里的管理地址是https://192.168.59.200:446,其管理初始用户名是openfiler(小写的),密码是password,可以在登录之后,修改这个密码。

wpsE476.tmp 

 

2.2  基本配置

2.2.1  网卡配置

wpsE477.tmp 

配置静态网卡地址:

[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-eth1

DEVICE=eth1

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: eth1: 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 eth1

    inet6 fe80::20c:29ff:fe98:1ad7/64 scope link

       valid_lft forever preferred_lft forever

[root@OFLHR ~]#

 

 

2.2.2  添加硬盘

添加一块100G大小的IDE格式的硬盘作为存储。

wpsE478.tmp 

[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 ~]#

 

 

2.3  iscsi target配置

openfiler服务器配置了两块硬盘,其中10GB的硬盘已经用来安装openfiler操作系统,而200GB的硬盘则会用做数据存储。

2.3.1  创建逻辑卷

 

登录地址:https://192.168.59.200:446

初始用户名和密码:openfiler/password

 

在独立存储设备中,LUN(Logical Unit Number)是最重要的基本单位。LUN可以被SAN中的任何主机访问,不管是透过HBA或是iSCSI。就算是软件激活的iSCSI,也可以在不同的操作系统之下,在操作系统启动之后利用软件的iSCSI initiator访问LUN。在OpenFiler之下,LUN被称为Logical VolumeLV),因此在OpenFiler下创建LUN就是创建LV

当你安装好OpenFiler之后,接下来就是要将OpenFiler下的磁盘分享出来给虚拟机或网络上的其他主机使用了。在标准的SAN之后,这些可以在RAID层面完成,但VG的好处及弹性是RAID无法比较的,下面看看OpenFiler下的VG是如何一步一步创建的。

 创建VG的步骤:

1)进入OpenFiler的接口,并且选择要使用的实体硬盘。

2)将要加入的实体硬盘格式化成Physical Volume格式。

3)创建一个VG组,并且将格式化成为PV格式的实体硬盘加入。

4)加入完毕之后,就成为一个大的VG组,被视为系统的一个大实体硬盘。

5)在这个VG中添加逻辑分割区LUN,在OpenFiler中称为Logical Volume

6)指定LUN的文件格式,如iSCSIext3或是NFS,并且格式化。

7)如果是iSCSI则需要再配置,如果是其他文件格式,就可以用NAS的方式分享出去而

 

 

登录后,点击Volumes标签

openfiler服务器配置了两块硬盘,其中10GB的硬盘已经用来安装openfiler操作系统,而200GB的硬盘则会用做数据存储。

wpsE479.tmp 

wpsE47A.tmp 

点击create new physical volumes点击/dev/sdb

wpsE47B.tmp 

点击页面右下角Reset,然后点击Create。分区类型为Physical volume

wpsE48B.tmp 

点击Volume Groups

wpsE48C.tmp 

wpsE48D.tmp 

输入名称,勾选复选框,单击Add volume group

wpsE48E.tmp 

[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 ~]#

 

 

点击Add Volume

wpsE48F.tmp 

 

输入内容,调整磁盘大小为10G,卷类型选择blockiSCSIFCetc

wpsE490.tmp 

wpsE491.tmp 

依次共创建4个逻辑卷:

wpsE492.tmp 

[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 ~]#

 

2.3.2  开启iSCSI Target服务

wpsE493.tmp 

点击Services标签栏设置iSCSI Target Enable 开启服务Start

 

2.3.3  LUN Mapping操作

wpsE494.tmp 

返回Volumes标签页,点击iSCSI Targets

wpsE495.tmp 

点击Add

选择LUN Mapping标签 点击Map

wpsE496.tmp 

2.3.4  Network ACL

由于iSCSI是走IP网络,因此我们要允许网络中的计算机可以透过IP来访问。下面就是OpenFilerIP网络和同一网段中其他主机的连接方法。

1.进入OpenFiler中的System,并且直接拉到页面的下方。

2.在Network Access Configuration的地方输入这个网络访问的名称,如VM_LHR

3.输入主机的IP段。注意不可以输入单一主机的IP,这样会都无法访问。我们在这边输入192.168.59.0,表示从192.168.59.1一直到192.168.59.254都能访问。

4.在Netmask中选择255.255.255.0,并且在Type下拉列表框中选择Share,之后即可以单击Update按钮。

wpsE497.tmp 

选择完之后就更新

至此就可以在这个OpenFiler中看到被授权的网段了。

 

iSCSI Targets中,点击 Network ACL 标签

wpsE498.tmp 

设置AccessAllow 然后点击Update

到此存储的配置已经完成

2.3.5  /etc/initiators.deny

注释掉iqn.2006-01.com.openfiler:tsn.5e423e1e4d90 ALL

[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 ~]#

 

 

第三章 RAC中配置共享

 

3.1  RAC节点配置iSCSI

iSCSI(Internet Small Computer System InterfaceiSCSI技术由IBM公司研究开发,是一个供硬件设备使用的、可以在IP协议的上层运行的SCSI指令集,这种指令集合可以实现在IP网络上运行SCSI协议,使其能够在诸如高速千兆以太网上进行路由选择。iSCSI技术是一种新储存技术,该技术是将现有SCSI接口与以太网络(Ethernet)技术结合,使服务器可与使用IP网络的储存装置互相交换资料。iSCSI是一种基于 TCP/IP 的协议,用来建立和管理 IP存储设备、主机和客户机等之间的相互连接,并创建存储区域网络(SAN)。

iSCSI target:就是储存设备端,存放磁盘或RAID的设备,目前也能够将Linux主机模拟成iSCSI target了!目的在提供其他主机使用的『磁盘』;

iSCSI initiator:就是能够使用target的用户端,通常是服务器。也就是说,想要连接到iSCSI target的服务器,也必须要安装iSCSI initiator的相关功能后才能够使用iSCSI target提供的磁盘。

3.1.1  iSCSI target

[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 ~]#

 

 

3.1.2  iSCSI initiator

3.1.2.1  安装iSCSI initiator

RAC的2个节点分别安装iSCSI initiator

[root@raclhr-12cR1-N1 ~]# rpm -qa|grep iscsi

iscsi-initiator-utils-6.2.0.873-10.el6.x86_64

[root@raclhr-12cR1-N1 ~]#

 

 

若未安装可使用yum install iscsi-initiator-utils*进行安装。

 

3.1.2.2  iscsiadm

iscsi initiator主要通过iscsiadm命令管理,我们先查看提供服务的iscsi target机器上有哪些target:

[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 ~]#

 

 

到这一步就可以看出,你服务端创建的iSCSI Target 的编号和名称。这条命令只需记住-p后面跟iSCSI服务的地址就行了,也可以是主机名,都可以!3260是服务的端口号,默认的!

然后就可以登陆某个target了,登陆成功某个target后,这个target下的硬盘也就都共享过来了:

[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

 

 

这里多出了8块盘,在openfiler中只map了四次,为什么这里是8块而不是4块呢?因为openfiler2块网卡,使用两个IP登录两次iscsi target,所以这里有两块是重复的

要查看各个iscsi的信息:

# iscsiadm -m session -P 3

[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 ~]#

 

登陆之后要对新磁盘进行分区,格式化,然后在挂载即可

完成这些命令后,iscsi initator会把这些信息记录到/var/lib/iscsi目录下:

/var/lib/iscsi/send_targets记录了各个target的情况,/var/lib/iscsi/nodes记录了各个target下的nodes情况。下次再启动iscsi initator时(service iscsi start),就会自动登陆各个target上。如果想让重新手工登陆各个target,需要把/var/lib/iscsi/send_targets目录下的内容和/var/lib/iscsi/nodes下的内容全部删除掉。

3.2  多路径multipath

3.2.1  RAC的2个节点上分别安装multipath软件

1、安装多路径软件包:

[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]#

 

 

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

 

 

 

3.2.2  启动multipath

将多路径软件添加至内核模块中

modprobe dm-multipath

modprobe dm-round-robin

 

检查内核添加情况

[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]#

 

将多路径软件multipath设置为开机自启动

[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]#

 

启动multipath服务

[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]#

 

3.2.3  配置多路径软件/etc/multipath.conf

1、配置multipath软件编辑/etc/multipath.conf

   注意:默认情况下/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

[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 ~]#

 

 

 

2、查看并获取存储分配给服务器的逻辑盘lunwwid信息

[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]#

 

 

将文件/etc/multipath/wwids和/etc/multipath/bindings的内容覆盖节点2

[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 ~]#

 

 

 

[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]#

 

 

3.2.4  编辑/etc/multipath.conf

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

 

 

[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]#

 

 

 

启动multipath配置

[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 ~]#

 

启用multipath配置后,会在/dev/mapper下生成多路径逻辑盘

[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]#

 

至此多路径multipath配置完成

3.2.5  配置multipath设备的权限

6.2之前配置multipath设备的权限只需要在设备配置里增加uid,gid,mode就可以

uid 1100 #uid

gid 1020 #gid

如:

        multipath {

                wwid                    360050763008101d4e00000000000000a

                alias                   DATA03

                uid                     501                                               #uid

                gid                     501                                               #gid

}

 

6.2之后配置multipath配置文件里去掉uid,gid,mode这三个参数,需要使用udev使用,示例文件在/usr/share/doc/device-mapper-version中有一个模板文件,名为12-dm-permissions.rules,您可以使用它并将其放在 /etc/udev/rules.d 目录中使其生效。

[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]#

 

 

将文件/etc/udev/rules.d/12-dm-permissions.rules复制到节点2上。

 

3.2.6  配置udev规则

脚本如下所示:

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

 

 

由于多路径的设置WWID有重复,所以应该去掉文件/etc/udev/rules.d/99-oracleasm.rules中的重复的行。

在节点1执行以下操作:

[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

 

 

打开文件/etc/udev/rules.d/99-oracleasm.rules去掉WWID重复的行只保留一行即可。

[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 ~]#

 

 

将文件/etc/udev/rules.d/99-oracleasm.rules的内容拷贝到节点2,然后重启udev

[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>

 

 

3.3  利用新磁盘创建磁盘组

CREATE DISKGROUP FRA external redundancy DISK '/dev/asm-diskf','/dev/asm-diskh' ATTRIBUTE 'compatible.rdbms' = '12.1', 'compatible.asm' = '12.1';

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 ~]#

 

 

3.3.1  测试磁盘组

[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>

 

 

将存储停掉一块网卡eth1

[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: eth1: 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 eth1

    inet6 fe80::20c:29ff:fe98:1ad7/64 scope link

       valid_lft forever preferred_lft forever

[root@OFLHR ~]# ifconfig eth1 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: eth1: 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 eth1

[root@OFLHR ~]#

 

 

rac节点查看日志:

[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 ~]#

 

表空间可以正常访问:

SQL> create table tt tablespace TESTMUL as select * from dual;

 

Table created.

 

SQL> select * from tt;

 

D

-

X

 

SQL>

 

同理,将eth1进行up,而将eth0宕掉,表空间依然正常。重启集群和存储后,集群一切正常。

第四章 测试多路径

重新搭建一套多路径的环境来测试多路径。

最简单的测试方法,是用dd往磁盘读写数据,然后用iostat观察各通道的流量和状态,以判断Failover或负载均衡方式是否正常:

# dd if=/dev/zero of=/dev/mapper/mpath0

# iostat -k 2

[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

 

 

 

 

重新开一个窗口执行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

 

 

wpsE4B9.tmp 


4.1  有关多路径其它理论知识

multipath生成映射后,会在/dev目录下产生多个指向同一条链路的设备:

/dev/mapper/mpathn

/dev/mpath/mpathn

/dev/dm-n

但它们的来源是完全不同的

/dev/mapper/mpathn multipath虚拟出来的多路径设备我们应该使用这个设备;/dev/mapper 中的设备是在引导过程中生成的。可使用这些设备访问多路径设备,例如在生成逻辑卷时。

/dev/mpath/mpathn udev设备管理器创建的,实际上就是指向下面的dm-n设备,仅为了方便,不能用来挂载;提供 /dev/mpath 中的设备是为了方便,这样可在一个目录中看到所有多路径设备。这些设备是由 udev 设备管理器生成的,且在系统需要访问它们时不一定能启动。请不要使用这些设备生成逻辑卷或者文件系统。

/dev/dm-n 是软件内部自身使用的,不能被软件以外使用,不可挂载。所有 /dev/dm-n 格式的设备都只能是作为内部使用,且应该永远不要使用。

简单来说,就是我们应该使用/dev/mapper/下的设备符。对该设备即可用fdisk进行分区,或创建为pv

 



   好了,有关使用OpenFiler来模拟存储配置RAC中ASM共享盘及多路径的测试就到此为止了。2016年结束了,今天是1月23日,明天是1月24日,小麦苗回家过年了,O(∩_∩)O~。在此也祝福各位网友和朋友身体健康,万事如意,合家欢乐,生活美满,事业有成,珠玉满堂,多寿多富,财大气粗,攻无不克,战无不胜!

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