免费自助建网站,销售的网络建设,做网站销售电话术语,福州做网站公司安装多路径软件#xff08;系统默认安装#xff09; #第一#xff1a;安装多路径软件yum -y install device-mapper device-mapper-multipath#第二#xff1a;在CentOS7中启用多路径模块#xff0c;mpathconf命令及相关模块加载#xff08;可以使用mpathconf -h查看用法系统默认安装 #第一安装多路径软件yum -y install device-mapper device-mapper-multipath#第二在CentOS7中启用多路径模块mpathconf命令及相关模块加载可以使用mpathconf -h查看用法
使用 mpathconf 命令创建配置文件并启用多路径。若无需编辑该配置文件,可使用此命令启动多路径守护程序mpathconf --enablempathconf --with_module ympathconf --with_multipathd y#第三在CentOS7中启动multipathd服务及设置开机自启systemctl start multipathd.servicesystemctl enable multipathd.service注意系统决定多路径设备的属性时,会先检查多路径设置,然后检查设备设置,最后才检查多路径系统默认设置 挂载iscsi设备并记录iscsi设备的全球识别符wwid号 #第一发现iscsiadm --mode discovery --type sendtargets --portal 192.168.1.40iscsiadm --mode discovery --type sendtargets --portal 192.168.1.50#第二登录iscsiadm -d2 -m node -T iqn.1994-05.com.redhat:scst1 -p 192.168.1.40 --loginiscsiadm -d2 -m node -T iqn.1994-05.com.redhat:scst1 -p 192.168.1.50 --login#第三查看磁盘发现有两块相同大小容量的磁盘fdisk -l#第四查看并记录iscsi设备的wwid号multipath -l 编辑多路径软件DM-Multipath的配置文件并重启多路径软件
#第一修改DM配置文件vim /etc/multipath.confdefaults {user_friendly_names yesfind_multipaths yes
}multipaths {multipath {wwid 23237636464633731 #这是刚才记录的wwid号alias vda #配置显示别名path_grouping_policy multibuspath_selector round-robin 0 #轮巡策略failback manualrr_weight prioritiesno_path_retry 5}
}blacklist {devnode sda
}#第二reload多路径软件systemctl reload multipathd.service#第三查看磁盘设备发现出现了一块/dev/mapper/vda的磁盘fdisk -l磁盘 /dev/mapper/vda4293 MB, 4293693440 字节8386120 个扇区
Units 扇区 of 1 * 512 512 bytes
扇区大小(逻辑/物理)512 字节 / 512 字节
I/O 大小(最小/最佳)4096 字节 / 524288 字节
磁盘标签类型dos
磁盘标识符0x00032eb1#第四分区格式化挂载使用#第五测试多路径down eth0 测试是否磁盘可写down eth1同时启用eth0 测试是否磁盘可写
DM-Multipath的配置文件概述 defaults #DM Multipath 的常规默认设置。blacklist #不被视为多路径的具体设备列表。blacklist_exceptions #根据 blacklist 部分中的参数列出不在黑名单中的多路径设备multipaths #各个独立多路径设备的特性设置。这些数值覆盖了在配置文件的 defaults 和 devices 部分中指定的数值devices #各个存储控制器的设置。这些数值覆盖了在配置文件的 defaults 部分指定的数值。如果要使用不是默认支持的存储阵列,则可能需要为您的阵列创建 devices 子部分vim /etc/multipath.conf# This is a basic configuration file with some examples, for device mapper
# multipath.
#
# For a complete list of the default configuration values, run either
# multipath -t
# or
# multipathd show config
#
# For a list of configuration options with descriptions, see the multipath.conf
# man page## By default, devices with vendor IBM and product S/390.* are
## blacklisted. To enable mulitpathing on these devies, uncomment the
## following lines.
#blacklist_exceptions {
# device {
# vendor IBM
# product S/390.*
# }
#}## Use user friendly names, instead of using WWIDs as names.
defaults {user_friendly_names yesfind_multipaths yes
}
##
## Here is an example of how to configure some standard options.
##
#
#defaults {
# polling_interval 10
# path_selector round-robin 0
# path_grouping_policy multibus
# uid_attribute ID_SERIAL
# prio alua
# path_checker readsector0
# rr_min_io 100
# max_fds 8192
# rr_weight priorities
# failback immediate
# no_path_retry fail
# user_friendly_names yes
#}
##
## The wwid line in the following blacklist section is shown as an example
## of how to blacklist devices by wwid. The 2 devnode lines are the
## compiled in default blacklist. If you want to blacklist entire types
## of devices, such as all scsi devices, you should use a devnode line.
## However, if you want to blacklist specific devices, you should use
## a wwid line. Since there is no guarantee that a specific device will
## not change names on reboot (from /dev/sda to /dev/sdb for example)
## devnode lines are not recommended for blacklisting specific devices.
##
#blacklist {
# wwid 26353900f02796769
# devnode ^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*
# devnode ^hd[a-z]
#}
#multipaths {
# multipath {
# wwid 3600508b4000156d700012000000b0000
# alias yellow
# path_grouping_policy multibus
# path_selector round-robin 0
# failback manual
# rr_weight priorities
# no_path_retry 5
# }
# multipath {
# wwid 1DEC_____321816758474
# alias red
# }
#}
#devices {
# device {
# vendor COMPAQ
# product HSV110 (C)COMPAQ
# path_grouping_policy multibus
# path_checker readsector0
# path_selector round-robin 0
# hardware_handler 0
# failback 15
# rr_weight priorities
# no_path_retry queue
# }
# device {
# vendor COMPAQ
# product MSA1000
# path_grouping_policy multibus
# }
#}multipaths {multipath {wwid 23237636464633731alias vdapath_grouping_policy multibuspath_selector round-robin 0failback manualrr_weight prioritiesno_path_retry 5}
}blacklist {devnode sda
} 这是centos7 多路径设备支持官方文档
https://qiniu.wsfnk.com/Red_Hat_Enterprise_Linux-7-DM_Multipath-zh-CN.pdf
