리눅스 > Redhat(CentOS) > [RHEL7.2] LVM 복구 - UUID 복구할때 [pvs / pvcreate ]

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[RHEL7.2] LVM 복구 - UUID 복구할때 [pvs / pvcreate ]

글쓴이 : 더코 날짜 : 2018-11-14 (수) 13:37 조회 : 3814

1. 문제 :sda가 OS 영역이며, vg그룹을 rhel 로 만들어놓은 상태임

그런데 sdb 에 rhel 그룹에 속하게 만들어 놨고, lv_crash 형태로 만들었는데 문제가 생겨 sdb가 unknow 으로 뜨면서 부팅이 오류가 나고 Rescue mode 에서 chroot 가 안됨.

2. 해결

1) rescue mode 로 진입 한다.

2) chroot 가 안 되면 pvs 상에 unknown 을 화인 한다.

3) pvcreate 를 진행 한다. ( LVM meta 가 날라 갔다는 전제로 )

#pvs -v // 이 명령어로 UUID를 확인할수있다.

# pvcreate --uuid "FmGRh3-zhok-iVI8-7qTD-S5BI-MAEN-NYM5Sk" --restorefile /etc/lvm/backup/rhel /dev/sdb

[백업정보가 있는파일] [대상DISK]

Physical volume "/dev/sdh1" successfully created

이 이후로 chroot가 정상적으로 실행된다.

- 추가로 부팅을 해도 볼륨이 올라오지 않는다면 포맷을 해야한다.

# mkfs.xfs /dev/rhel/lv_crash

# mount -a

theko

2018-12-05 (수) 00:51

혹, pvscan 을 하면 /etc/lvm/backup/vg_os 가 업데이트가 된다. 현시점으로

그럼 백업 파일로 복구를 한다. 단, UUID는 현재 시점으로 맞춰주고 진행.

ex)

# pvs -v

Wiping internal VG cache

Wiping cache of LVM-capable devices

PV VG Fmt Attr PSize PFree DevSize PV UUID

/dev/sda2 rhel lvm2 a-- <99.00g 0 <99.00g DV9yPf-qU2Z-N0Li-L4yX-AZ5N-W13P-fwC2fz

/dev/sdb rhel lvm2 a-- <100.00g 0 100.00g 8uXHki-xhAE-nUtI-3Sf2-MjYi-ejt3-n41jC3

/dev/sdc vgshare_cssprddb lvm2 a-- 1.46t 0 1.61t JAmuXf-fWLo-paj0-P3Pn-rjAI-MSQu-124WUB

/dev/sdd vgshare_cssprddb lvm2 a-- 1.95t 0 <2.15t soaP7i-kroU-ap3v-92NI-mVG3-eJIT-X6nMm8

/dev/sde vgshare_cssprddb lvm2 a-- 1.95t 0 <2.15t 8fKvyA-IwoR-357q-KMgM-fbB1-82Y5-UVk0nA

/dev/sdf vgshare_cssprddb lvm2 a-- <100.00g 0 150.00g 63UKg0-Kzhn-1dyL-prA3-W5RW-D7z9-ppWxmX

pv0 {

id = "JAmuXf-fWLo-paj0-P3Pn-rjAI-MSQu-124WUB"

device = "/dev/sdc" # Hint only

status = ["ALLOCATABLE"]

}

pv1 {

id = "soaP7i-kroU-ap3v-92NI-mVG3-eJIT-X6nMm8"

device = "/dev/sdd" # Hint only

혹, pvscan 을 하면 /etc/lvm/backup/vg_os 가 업데이트가 된다. 현시점으로<div><br></div><div>그럼 백업 파일로 복구를 한다. 단, UUID는 현재 시점으로 맞춰주고 진행.</div><div><br></div><div>ex)</div><div><br></div><div><div># pvs -v</div><div>&nbsp; &nbsp; Wiping internal VG cache</div><div>&nbsp; &nbsp; Wiping cache of LVM-capable devices</div><div>&nbsp; PV&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;VG&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Fmt&nbsp; Attr PSize&nbsp; &nbsp; PFree DevSize PV UUID</div><div>&nbsp; /dev/sda2&nbsp; rhel&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;lvm2 a--&nbsp; &nbsp;&lt;99.00g&nbsp; &nbsp; 0&nbsp; &lt;99.00g DV9yPf-qU2Z-N0Li-L4yX-AZ5N-W13P-fwC2fz</div><div>&nbsp; /dev/sdb&nbsp; &nbsp;rhel&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;lvm2 a--&nbsp; &lt;100.00g&nbsp; &nbsp; 0&nbsp; 100.00g 8uXHki-xhAE-nUtI-3Sf2-MjYi-ejt3-n41jC3</div><div>&nbsp; /dev/sdc&nbsp; &nbsp;vgshare_cssprddb lvm2 a--&nbsp; &nbsp; &nbsp;1.46t&nbsp; &nbsp; 0&nbsp; &nbsp; 1.61t JAmuXf-fWLo-paj0-P3Pn-rjAI-MSQu-124WUB</div><div>&nbsp; /dev/sdd&nbsp; &nbsp;vgshare_cssprddb lvm2 a--&nbsp; &nbsp; &nbsp;1.95t&nbsp; &nbsp; 0&nbsp; &nbsp;&lt;2.15t soaP7i-kroU-ap3v-92NI-mVG3-eJIT-X6nMm8</div><div>&nbsp; /dev/sde&nbsp; &nbsp;vgshare_cssprddb lvm2 a--&nbsp; &nbsp; &nbsp;1.95t&nbsp; &nbsp; 0&nbsp; &nbsp;&lt;2.15t 8fKvyA-IwoR-357q-KMgM-fbB1-82Y5-UVk0nA</div><div>&nbsp; /dev/sdf&nbsp; &nbsp;vgshare_cssprddb lvm2 a--&nbsp; &lt;100.00g&nbsp; &nbsp; 0&nbsp; 150.00g 63UKg0-Kzhn-1dyL-prA3-W5RW-D7z9-ppWxmX</div></div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div><div>pv0 {</div><div>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; id = "JAmuXf-fWLo-paj0-P3Pn-rjAI-MSQu-124WUB"</div><div>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; device = "/dev/sdc"&nbsp; &nbsp; &nbsp;# Hint only</div><div><br></div><div>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; status = ["ALLOCATABLE"]</div><div><br></div><div>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }</div><div><br></div><div>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; pv1 {</div><div>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; id = "soaP7i-kroU-ap3v-92NI-mVG3-eJIT-X6nMm8"</div><div>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; device = "/dev/sdd"&nbsp; &nbsp; &nbsp;# Hint only</div></div><div><br></div><div><br></div><div><br></div><div><br></div>

theko

2018-12-05 (수) 00:53

vgcfgrestore --file /etc/lvm/backup/<volume group name> <volume group name>

pvcreate --restorefile /etc/lvm/backup/<volume group name> --uuid <UUID> <device>