centos8中lvm丢失PV找回方法步骤
时间：2022-12-18 22:30:00
机器重启后vmstore卷丢失pvscan、vgscan、lvscan均不到vmstore卷。
先执行fdisk -l，检查磁盘分区，发现/dev/sdb /dev/sdc两个磁盘已经挂载/dev/mapper目录下。
第一步，先删除mapper
[root@node103 ~]# pvscan PV /dev/sdd2 VG onn lvm2 [277.87 GiB / 54.18 GiB free] PV /dev/sda VG gluster_vg_sda lvm2 [558.91 GiB / 0 free] Total: 2 [836.78 GiB] / in use: 2 [836.78 GiB] / in no VG: 0 [0 ] [root@node103 ~]# vgcfgrestore vmstore WARNING: Couldn't find device with uuid m8ZIeU-j2eU-8ZMK-q52W-Zcjd-hqij-JSG8XF . WARNING: Couldn't find device with uuid pHlCKc-wvGK-4DKX-m5IF-IXig-BZJM-YqX38s . Cannot restore Volume Group vmstore with 2 PVs marked as missing. Restore failed. [root@node103 ~]# cd /etc/lvm/backup/ [root@node103 backup]# ls gluster_vg_sda onn vmstore [root@node103 backup]# cd vmstore -bash: cd: vmstore: Not a directory [root@node103 backup]# ls gluster_vg_sda onn vmstore [root@node103 backup]# pvcreate --uuid 'm8ZIeU-j2eU-8ZMK-q52W-Zcjd-hqij-JSG8XF' --restorefile
/etc
/lvm
/backup
/vmstore
/dev
/sdb WARNING
: Couldn
't find device with uuid m8ZIeU
-j2eU
-
8ZMK
-q52W
-Zcjd
-hqij
-JSG8XF
. WARNING
: Couldn
't find device with uuid pHlCKc
-wvGK
-
4DKX
-m5IF
-IXig
-BZJM
-YqX38s
. Cannot use
/dev
/sdb
: device is a multipath component
[root@node103 backup
]# fdisk
-l Disk
/dev
/sdd
:
278.9 GiB
,
299439751168 bytes
,
584843264 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 Disklabel type
: dos Disk identifier
:
0xe6ac2d12 Device Boot Start End Sectors Size Id Type
/dev
/sdd1
*
2048
2099199
2097152
1G
83 Linux
/dev
/sdd2
2099200
584843263
582744064
277.9G
8e Linux LVM Disk
/dev
/sda
:
558.9 GiB
,
600127266816 bytes
,
1172123568 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
/dev
/sdc
:
838.4 GiB
,
900185481216 bytes
,
1758174768 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
/dev
/sdb
:
838.4 GiB
,
900185481216 bytes
,
1758174768 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
/dev
/mapper
/onn
-ovirt
--node
--ng
--
4.4
.
10.2
--
0.20220303
.
0
+
1
:
169 GiB
,
181466562560 bytes
,
354426880 sectors Units
: sectors of
1
*
512
=
512 bytes Sector
size
(logical
/physical
)
:
512 bytes
/
512 bytes I
/O
size
(minimum
/optimal
)
:
65536 bytes
/
65536 bytes Disk
/dev
/mapper
/onn
-swap
:
15.7 GiB
,
16840130560 bytes
,
32890880 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
/dev
/mapper
/
350014ee7aaad2514
:
838.4 GiB
,
900185481216 bytes
,
1758174768 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
/dev
/mapper
/
350014ee7000283fc
:
838.4 GiB
,
900185481216 bytes
,
1758174768 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
/dev
/mapper
/onn
-var_log_audit
:
2 GiB
,
2147483648 bytes
,
4194304 sectors Units
: sectors of
1
*
512
=
512 bytes Sector
size
(logical
/physical
)
:
512 bytes
/
512 bytes I
/O
size
(minimum
/optimal
)
:
65536 bytes
/
65536 bytes Disk
/dev
/mapper
/onn
-var_log
:
8 GiB
,
8589934592 bytes
,
16777216 sectors Units
: sectors of
1
*
512
=
512 bytes Sector
size
(logical
/physical
)
:
512 bytes
/
512 bytes I
/O
size
(minimum
/optimal
)
:
65536 bytes
/
65536 bytes Disk
/dev
/mapper
/onn
-var_crash
:
10 GiB
,
10737418240 bytes
,
20971520 sectors Units
: sectors of
1
*
512
=
512 bytes Sector
size
(logical
/physical
)
:
512 bytes
/
512 bytes I
/O
size
(minimum
/optimal
)
:
65536 bytes
/
65536 bytes Disk
/dev
/mapper
/onn
-var
:
15 GiB
,
16106127360 bytes
,
31457280 sectors Units
: sectors of
1
*
512
=
512 bytes Sector
size
(logical
/physical
)
:
512 bytes
/
512 bytes I
/O
size
(minimum
/optimal
)
:
65536 bytes
/
65536 bytes Disk
/dev
/mapper
/onn
-tmp
:
1 GiB
,
1073741824 bytes
,
2097152 sectors Units
: sectors of
1
*
512
=
512 bytes Sector
size
(logical
/physical
)
:
512 bytes
/
512 bytes I
/O
size
(minimum
/optimal
)
:
65536 bytes
/
65536 bytes Disk
/dev
/mapper
/onn
-home
:
1 GiB
,
1073741824 bytes
,
2097152 sectors Units
: sectors of
1
*
512
=
512 bytes Sector
size
(logical
/physical
)
:
512 bytes
/
512 bytes I
/O
size
(minimum
/optimal
)
:
65536 bytes
/
65536 bytes Disk
/dev
/mapper
/gluster_vg_sda
-gluster_lv_engine
:
100 GiB
,
107374182400 bytes
,
209715200 sec tors 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
/dev
/mapper
/gluster_vg_sda
-gluster_lv_data
:
480 GiB
,
515396075520 bytes
,
1006632960 sect ors Units
: sectors of
1
*
512
=
512 bytes Sector
size
(logical
/physical
)
:
512 bytes
/
512 bytes I
/O
size
(minimum
/optimal
)
:
131072 bytes
/
262144 bytes
[root@node103 backup
]# blkid
/dev
/mapper
/onn
-var_crash
: UUID
=
"00050fc2-5319-46da-b6c2-b0557f602845" BLOCK_SIZE
=
"512" TYPE
=
"xfs"
/dev
/sdd2
: UUID
=
"DWXIm1-1QSa-qU1q-0urm-1sRl-BEiz-NaemIW" TYPE
=
"LVM2_member" PARTUUID
=
"e6ac2d1 2-02"
/dev
/sdd1
: UUID
=
"840d0f88-c5f0-4a98-a7dd-73ebf347a85b" BLOCK_SIZE
=
"512" TYPE
=
"xfs" PARTUUID
=
" e6ac2d12-01"
/dev
/sda
: UUID
=
"kMvSz0-GoE5-Q0vf-qrjM-3H5m-NCLg-fSTZb8" TYPE
=
"LVM2_member"
/dev
/sdc
: UUID
=
"pHlCKc-wvGK-4DKX-m5IF-IXig-BZJM-YqX38s" TYPE
=
"LVM2_member"
/dev
/sdb
: UUID
=
"m8ZIeU-j2eU-8ZMK-q52W-Zcjd-hqij-JSG8XF" TYPE
=
"LVM2_member"
/dev
/mapper
/onn
-ovirt
--node
--ng
--
4.4
.
10.2
--
0.20220303
.
0
+
1
: UUID
=
"8bef5e42-0fd1-4595-8b3c-0791 27a2c237" BLOCK_SIZE
=
"512" TYPE
=
"xfs"
/dev
/mapper
/onn
-swap
: UUID
=
"18284c2e-3596-4596-b0e8-59924944c417" TYPE
=
"swap"
/dev
/mapper
/
350014ee7aaad2514
: UUID
=
"m8ZIeU-j2eU-8ZMK-q52W-Zcjd-hqij-JSG8XF" TYPE
=
"LVM2_membe r"
/dev
/mapper
/
350014ee7000283fc
: UUID
=
"pHlCKc-wvGK-4DKX-m5IF-IXig-BZJM-YqX38s" TYPE
=
"LVM2_membe r"
/dev
/mapper
/onn
-var_log_audit
: UUID
=
"928237b1-7c78-42d0-afca-dfd362225740" BLOCK_SIZE
=
"512" T YPE
=
"xfs"
/dev
/mapper
/onn
-var_log
: UUID
=
"cb6aafa3-9a97-4dc5-81f6-d2da3b0fdcd9" BLOCK_SIZE
=
"512" TYPE
=
"x fs"
/dev
/mapper
/onn
-var
: UUID
=
"47b2e20c-f623-404d-9a12-3b6a31b71096" BLOCK_SIZE
=
"512" TYPE
=
"xfs"
/dev
/mapper
/onn
-tmp
: UUID
=
"599eda13-d184-4a59-958c-93e37bc6fdaa" BLOCK_SIZE
=
"512" TYPE
=
"xfs"
/dev
/mapper
/onn
-home
: UUID
=
"ef67a11a-c786-42d9-89d0-ee518b50fce5" BLOCK_SIZE
=
"512" TYPE
=
"xfs"
/dev
/mapper
/gluster_vg_sda
-gluster_lv_engine
: UUID
=
"3b99a374-baa4-4783-8da8-8ecbfdb227a4" BLO CK_SIZE
=
"512" TYPE
=
"xfs"
/dev
/mapper
/gluster_vg_sda
-gluster_lv_data
: UUID
=
"eb5ef30a-cb48-4491-99c6-3e6c6bfe3f69" BLOCK _SIZE
=
"512" TYPE
=
"xfs"
[root@node103 backup
]# dmsetup remove
350014ee7aaad2514
[root@node103 backup
]# dmsetup remove
350014ee7000283fc
可以通过 lsblk blkid 等命令查看磁盘uuid
第二步，查看vmstore卷，没有找到
[root@node103 ~]# pvscan
PV /dev/sdd2 VG onn lvm2 [277.87 GiB / 54.18 GiB free]
PV /dev/sda VG gluster_vg_sda lvm2 [558.91 GiB / 0 free]
Total: 2 [836.78 GiB] / in use: 2 [836.78 GiB] / in no VG: 0 [0 ]
[root@node103 ~]# vgcfgrestore vmstore
WARNING: Couldn't find device with uuid m8ZIeU-j2eU-8ZMK-q52W-Zcjd-hqij-JSG8XF .
WARNING: Couldn't find device with uuid pHlCKc-wvGK-4DKX-m5IF-IXig-BZJM-YqX38s .
Cannot restore Volume Group vmstore with 2 PVs marked as missing.
Restore failed.
[root@node103 ~]# cd /etc/lvm/backup/
[root@node103 backup]# ls
gluster_vg_sda onn vmstore[root@node103 backup]# more vmstore
# Generated by LVM2 version 2.03.12(2)-RHEL8 (2021-05-19): Tue Jun 7 10:42:40 2022
contents = "Text Format Volume Group"
version = 1
description = "Created *after* executing 'lvcreate -l 100%VG -n lv_store vmstore'"
creation_host = "node103" # Linux node103 4.18.0-365.el8.x86_64 #1 SMP Thu Feb 10 16:11
:23 UTC 2022 x86_64
creation_time = 1654569760 # Tue Jun 7 10:42:40 2022
vmstore {
id = "HmgGJN-YzQf-8Kks-k36u-3kU1-yBRj-bMM6ME"
seqno = 2
format = "lvm2" # informational
status = ["RESIZEABLE", "READ", "WRITE"]
flags = []
extent_size = 8192 # 4 Megabytes
max_lv = 0
max_pv = 0
metadata_copies = 0
physical_volumes {
pv0 {
id = "m8ZIeU-j2eU-8ZMK-q52W-Zcjd-hqij-JSG8XF"
device = "/dev/sdb" # Hint only
status = ["ALLOCATABLE"]
flags = []
dev_size = 1758174768 # 838.363 Gigabytes
pe_start = 2048
pe_count = 214620 # 838.359 Gigabytes
}
pv1 {
id = "pHlCKc-wvGK-4DKX-m5IF-IXig-BZJM-YqX38s"
device = "/dev/sdc" # Hint only
status = ["ALLOCATABLE"]
flags = []
dev_size = 1758174768 # 838.363 Gigabytes
pe_start = 2048
pe_count = 214620 # 838.359 Gigabytes
}
}
logical_volumes {
lv_store {
id = "KP7KUD-n7ZO-XMmY-d6De-dd8j-dR15-jdPF4X"
status = ["READ", "WRITE", "VISIBLE"]
flags = []
creation_time = 1654569760 # 2022-06-07 10:42:40 +0800
creation_host = "node103"
segment_count = 2
segment1 {
start_extent = 0
extent_count = 214620 # 838.359 Gigabytes
type = "striped"
stripe_count = 1 # linear
stripes = [
"pv0", 0
]
}
segment2 {
start_extent = 214620
extent_count = 214620 # 838.359 Gigabytes
type = "striped"
stripe_count = 1 # linear
stripes = [
"pv1", 0
]
}
}
}
}
[root@node103 backup]#
[root@node103 backup]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 558.9G 0 disk
├─gluster_vg_sda-gluster_lv_engine 253:14 0 100G 0 lvm /gluster_bricks/engine
├─gluster_vg_sda-gluster_thinpool_gluster_vg_sda_tmeta
│ 253:15 0 3G 0 lvm
│ └─gluster_vg_sda-gluster_thinpool_gluster_vg_sda-tpool
│ 253:17 0 452.9G 0 lvm
│ ├─gluster_vg_sda-gluster_thinpool_gluster_vg_sda
│ │ 253:18 0 452.9G 1 lvm
│ └─gluster_vg_sda-gluster_lv_data 253:19 0 480G 0 lvm /gluster_bricks/data
└─gluster_vg_sda-gluster_thinpool_gluster_vg_sda_tdata
253:16 0 452.9G 0 lvm
└─gluster_vg_sda-gluster_thinpool_gluster_vg_sda-tpool
253:17 0 452.9G 0 lvm
├─gluster_vg_sda-gluster_thinpool_gluster_vg_sda
│ 253:18 0 452.9G 1 lvm
└─gluster_vg_sda-gluster_lv_data 253:19 0 480G 0 lvm /gluster_bricks/data
sdb 8:16 0 838.4G 0 disk
└─350014ee7aaad2514 253:5 0 838.4G 0 mpath
sdc 8:32 0 838.4G 0 disk
└─350014ee7000283fc 253:6 0 838.4G 0 mpath
sdd 8:48 0 278.9G 0 disk
├─sdd1 8:49 0 1G 0 part /boot
└─sdd2 8:50 0 277.9G 0 part
├─onn-pool00_tmeta 253:0 0 1G 0 lvm
│ └─onn-pool00-tpool 253:2 0 206G 0 lvm
│ ├─onn-ovirt--node--ng--4.4.10.2--0.20220303 
