1 主机多路径配置 （挂载磁盘阵列）

rpm –qa|grep multipath 
rpm -ivh 包名
yum install device-mapper-multipath
systemctl enable multipathd.service 

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
[root@localhost multipath]# systemctl cat  multipathd.service
# /usr/lib/systemd/system/multipathd.service
[Unit]
Description=Device-Mapper Multipath Device Controller
Wants=blk-availability.service
Before=iscsi.service iscsid.service lvm2-activation-early.service
After=syslog.target systemd-udev-trigger.service
ConditionPathExists=/etc/multipath.conf
ConditionKernelCommandLine=!nompath
DefaultDependencies=no
Conflicts=shutdown.target

[Service]
Type=forking
PIDFile=/run/multipathd/multipathd.pid
ExecStartPre=/sbin/modprobe dm-multipath
ExecStartPre=-/sbin/multipath -A
ExecStart=/sbin/multipathd
ExecReload=/sbin/multipathd reconfigure
#ExecStop=/path/to/scrip delete-me if not necessary

[Install]
WantedBy=sysinit.target

sudo yum install iscsi-initiator-utils lvm2 rsyslog systemd open-iscsi
systemctl start iscsi iscsid lvm2-activation-early rsyslog systemd-udev-trigger
systemctl enable iscsi iscsid lvm2-activation-early rsyslog systemd-udev-trigger

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
[root@node3 data]# more /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 yes
    find_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
#    }
#}
devices {
    device {
        vendor            "HUAWEI"
        product            "S5500T"
        path_grouping_policy    group_by_prio
        prio            alua
        path_selector        "round-robin 0"
        path_checker        tur
        failback        immediate
        dev_loss_tmo        30
        fast_io_fail_tmo    5
    }
}
blacklist {
}

# end

强制刷新（Flush）当前所有多路径设备映射

1
multipath -F

重启多路径守护进程

1
2
systemctl restart multipathd.service
systemctl status multipathd.service

显示多路径调试信息: multipath -v3
列出所有多路径设备拓扑: multipath -ll

2 分区

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
[root@localhost ~]# parted /dev/mapper/mpatha
GNU Parted 3.1
使用 /dev/mapper/mpatha
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) mklabel gpt
警告: The existing disk label on /dev/mapper/mpatha will be destroyed and all data on this disk will be lost. Do you want to continue?
是/Yes/否/No? y                                                           
(parted) mkpart primary 0 -1                                              
警告: The resulting partition is not properly aligned for best performance.
忽略/Ignore/放弃/Cancel? I                                                
(parted) quit                                                             
信息: You may need to update /etc/fstab.

[root@localhost ~]# blkid                                                 
/dev/mapper/mpatha1: UUID="21236ff3-073d-4cef-8eb0-0389794be0c9" TYPE="xfs" PARTLABEL="primary" PARTUUID="9305b722-73df-4f41-8393-3d892d727c7c" 

# 2 /etc/fstab
# 3 Created by anaconda on Mon Jun 19 14:22:30 2023
# 4 #
# 5 Accessible filesystems, by reference, are maintained under '/dev/disk'
# 6 See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
# 7 #
UUID=75359154-2b3a-46ee-abed-5b7a183d802d /                       xfs     defaults        0 0
UUID=55f1713a-7a78-4d95-bff7-8c6e7da633ba /boot                   xfs     defaults        0 0
UUID=4256-E488          /boot/efi               vfat    umask=0077,shortname=winnt 0 0
UUID=d3e394f9-532c-4a5d-89a3-c670f897f3fd /home                   xfs     defaults        0 0
UUID=79928852-2e1a-46c4-82d2-41896a1add1c /data                   xfs     defaults        0 0
UUID=3a32c76f-d986-4764-8f16-2ac92f3e127b swap                    swap    defaults        0 0

[root@localhost ~]# mount -a

3 查看

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
[root@localhost ~]# lsblk
NAME        MAJ:MIN RM  SIZE RO TYPE  MOUNTPOINT
sda           8:0    0  557G  0 disk  
├─sda1        8:1    0    2G  0 part  /boot/efi
├─sda2        8:2    0    1G  0 part  /boot
├─sda3        8:3    0  150G  0 part  /
├─sda4        8:4    0   16G  0 part  [SWAP]
└─sda5        8:5    0  388G  0 part  /home
sdb           8:16   0    4T  0 disk  
└─mpatha    253:0    0    4T  0 mpath 
  └─mpatha1 253:1    0    4T  0 part  /data
sdc           8:32   0    4T  0 disk  
└─mpatha    253:0    0    4T  0 mpath 
  └─mpatha1 253:1    0    4T  0 part  /data
sr0          11:0    1 1024M  0 rom