multipath多路径实验02-配置多路径软件
在上一篇文章《multipath多路径实验01-构建iSCSI模拟环境》,我构建了iSCSI的模拟环境,在文章最后,已经成功配置并在主机上认出多个链路分别映射出的盘。而本文我就要对这样的多路径环境,通过Linux自带multipath多路径软件聚合成可以方便我们后期使用的形式。
1.安装多路径软件包
查询是否安装了多路径软件包:
rpm -qa |grep device-mapper-multipath
如果没有安装,则用yum安装即可:
yum isntall device-mapper-multipath
[root@jyrac1 ~]# yum install device-mapper-multipath Loaded plugins: product-id, security, subscription-manager This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register. Setting up Install Process Resolving Dependencies--> Running transaction check---> Package device-mapper-multipath.x86_64 0:0.4.9-72.el6 will be installed--> Processing Dependency: device-mapper-multipath-libs = 0.4.9-72.el6 for package: device-mapper-multipath-0.4.9-72.el6.x86_64--> Processing Dependency: libmultipath.so()(64bit) for package: device-mapper-multipath-0.4.9-72.el6.x86_64--> Processing Dependency: libmpathpersist.so.0()(64bit) for package: device-mapper-multipath-0.4.9-72.el6.x86_64--> Running transaction check---> Package device-mapper-multipath-libs.x86_64 0:0.4.9-72.el6 will be installed--> Finished Dependency ResolutionDependencies Resolved ================================================================================================================== Package Arch Version Repository Size================================================================================================================== Installing: device-mapper-multipath x86_64 0.4.9-72.el6 ISO 116 kInstalling for dependencies: device-mapper-multipath-libs x86_64 0.4.9-72.el6 ISO 180 kTransaction Summary ==================================================================================================================Install 2 Package(s) Total download size: 297 kInstalled size: 653 kIs this ok [y/N]: y Downloading Packages:------------------------------------------------------------------------------------------------------------------Total 2.8 MB/s | 297 kB 00:00 Running rpm_check_debug Running Transaction TestTransaction Test Succeeded Running Transaction Installing : device-mapper-multipath-libs-0.4.9-72.el6.x86_64 1/2 Installing : device-mapper-multipath-0.4.9-72.el6.x86_64 2/2 Verifying : device-mapper-multipath-libs-0.4.9-72.el6.x86_64 1/2 Verifying : device-mapper-multipath-0.4.9-72.el6.x86_64 2/2 Installed: device-mapper-multipath.x86_64 0:0.4.9-72.el6 Dependency Installed: device-mapper-multipath-libs.x86_64 0:0.4.9-72.el6 Complete!
如果不方便配置yum,也可以直接rpm安装这两个包:
[root@jyrac2 Packages]# rpm -ivh device-mapper-multipath-libs-0.4.9-72.el6.x86_64.rpmwarning: 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@jyrac2 Packages]# rpm -ivh device-mapper-multipath-0.4.9-72.el6.x86_64.rpmwarning: 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%]
2.设置服务开机启动
查询当前开机自启用设置:
chkconfig --list|grep multipathd
确认内核成功加载:
modprobe -l |grep multipath
确认开启开机自启动:
[root@jyrac1 ~]# chkconfig multipathd on[root@jyrac1 ~]# chkconfig --list|grep multipathdmultipathd 0:off 1:off 2:on 3:on 4:on 5:on 6:off
3.生成multipath配置文件
生成multipath配置文件:
/sbin/mpatchconf --enable
确认服务状态:
service multipathd status
4.multipath的常用命令
常用命令:
--生成multipath配置文件/sbin/mpathconf --enable--显示多路径的布局multipath -ll--重新刷取multipath -v2--清空所有多路径multipath -F
针对上述常用命令,实际操作的记录,供参考:
[root@jyrac1 ~]# multipath -ll Jul 18 15:57:18 | DM multipath kernel driver not loaded Jul 18 15:57:18 | /etc/multipath.conf does not exist, blacklisting all devices. Jul 18 15:57:18 | A sample multipath.conf file is located at Jul 18 15:57:18 | /usr/share/doc/device-mapper-multipath-0.4.9/multipath.conf Jul 18 15:57:18 | You can run /sbin/mpathconf to create or modify /etc/multipath.conf Jul 18 15:57:18 | DM multipath kernel driver not loaded [root@jyrac1 ~]# chkconfig --list|grep multipathdmultipathd 0:off 1:off 2:off 3:off 4:off 5:off 6:off[root@jyrac1 ~]# modprobe -l |grep multipath kernel/drivers/md/dm-multipath.ko [root@jyrac1 ~]# service multipathd statusmultipathd is stopped [root@jyrac1 ~]# service multipathd startStarting multipathd daemon: [ OK ] [root@jyrac1 ~]# multipath -ll Jul 18 15:59:00 | /etc/multipath.conf does not exist, blacklisting all devices. Jul 18 15:59:00 | A sample multipath.conf file is located atJul 18 15:59:00 | /usr/share/doc/device-mapper-multipath-0.4.9/multipath.conf Jul 18 15:59:00 | You can run /sbin/mpathconf to create or modify /etc/multipath.conf [root@jyrac1 ~]# /sbin/mpathconf --enable[root@jyrac1 ~]# multipath -v2 Jul 18 16:02:52 | mpatha: ignoring mapJul 18 16:02:52 | mpathb: ignoring mapJul 18 16:02:52 | mpathc: ignoring mapJul 18 16:02:52 | mpathd: ignoring mapJul 18 16:02:52 | mpathe: ignoring mapJul 18 16:02:52 | mpathf: ignoring mapcreate: mpathg (1IET 00010001) undef IET,VIRTUAL-DISKsize=10G features='0' hwhandler='0' wp=undef |-+- policy='round-robin 0' prio=1 status=undef | `- 10:0:0:1 sdi 8:128 undef ready running `-+- policy='round-robin 0' prio=1 status=undef `- 11:0:0:1 sdj 8:144 undef ready running [root@jyrac1 ~]# multipath -ll mpathg (1IET 00010001) dm-2 IET,VIRTUAL-DISK size=10G features='0' hwhandler='0' wp=rw |-+- policy='round-robin 0' prio=1 status=active | `- 10:0:0:1 sdi 8:128 active ready running`-+- policy='round-robin 0' prio=1 status=enabled `- 11:0:0:1 sdj 8:144 active ready running [root@jyrac1 ~]#
这里测试没有问题后,为了后续方便测试ASM磁盘组,在iSCSI服务端又分了一个10g的lv,模拟存储端分出的一个LUN,最后在这边就应该有两个多路径聚合盘了。同样的方法在RAC的另一个节点也都配置好。
5.udev绑定权限
我这里系统是RHEL6.5,对于multipath的权限,手工去修改几秒后会变回root。所以需要使用udev去绑定好权限。
搜索对应的配置文件模板:
[root@jyrac1 ~]# find / -name 12-*/usr/share/doc/device-mapper-1.02.79/12-dm-permissions.rules
根据模板新增12-dm-permissions.rules文件在/etc/udev/rules.d/下面:
vi /etc/udev/rules.d/12-dm-permissions.rules # MULTIPATH DEVICES # # Set permissions for all multipath devices ENV{DM_UUID}=="mpath-?*", OWNER:="grid", GROUP:="asmadmin", MODE:="660"# Set permissions for first two partitions created on a multipath device (and detected by kpartx) # ENV{DM_UUID}=="part[1-2]-mpath-?*", OWNER:="root", GROUP:="root", MODE:="660"
查看多路径对应的底层dm设备:
[root@jyrac2 rules.d]# ls -lh /dev/dm*brw-rw---- 1 root disk 253, 0 Jul 19 16:40 /dev/dm-0brw-rw---- 1 root disk 253, 1 Jul 19 16:40 /dev/dm-1brw-rw---- 1 root disk 253, 2 Jul 19 21:20 /dev/dm-2brw-rw---- 1 root disk 253, 3 Jul 19 21:20 /dev/dm-3--启动start_udev [root@jyrac2 rules.d]# start_udev Starting udev: [ OK ] --查看权限: [root@jyrac2 rules.d]# ls -lh /dev/dm*brw-rw---- 1 root disk 253, 0 Jul 19 21:35 /dev/dm-0brw-rw---- 1 root disk 253, 1 Jul 19 21:35 /dev/dm-1brw-rw---- 1 grid asmadmin 253, 2 Jul 19 21:35 /dev/dm-2brw-rw---- 1 grid asmadmin 253, 3 Jul 19 21:35 /dev/dm-3--等30s后再查,权限固定: [root@jyrac2 rules.d]# ls -lh /dev/dm*brw-rw---- 1 root disk 253, 0 Jul 19 21:35 /dev/dm-0brw-rw---- 1 root disk 253, 1 Jul 19 21:35 /dev/dm-1brw-rw---- 1 grid asmadmin 253, 2 Jul 19 21:35 /dev/dm-2brw-rw---- 1 grid asmadmin 253, 3 Jul 19 21:35 /dev/dm-3
发现权限固定不变没有问题了,在RAC的另一个节点也同样设置。
这时多路径的信息再查看下:
[root@jyrac1 ~]# multipath -llmpathi (1IET 00010002) dm-2 IET,VIRTUAL-DISK size=10G features='0' hwhandler='0' wp=rw |-+- policy='round-robin 0' prio=1 status=active | `- 13:0:0:2 sdk 8:160 active ready running`-+- policy='round-robin 0' prio=1 status=enabled `- 12:0:0:2 sdl 8:176 active ready running mpathg (1IET 00010001) dm-3 IET,VIRTUAL-DISK size=10G features='0' hwhandler='0' wp=rw |-+- policy='round-robin 0' prio=1 status=active | `- 13:0:0:1 sdi 8:128 active ready running `-+- policy='round-robin 0' prio=1 status=enabled `- 12:0:0:1 sdj 8:144 active ready running [root@jyrac1 ~]#
在另一个节点也要达到同样效果。
6.新建ASM磁盘组测试
http://www.cnblogs.com/jyzhao/p/7208620.html