解决vg重名问题

问题

有一个场景是我们有两台服务器,硬盘按相同标准格式化成LVM,其中一台服务器坏了修不了,把硬盘插到另一台服务器发现vg重名了导致识别不了。

通过vgdisplay看到报错如下。

WARNING: Duplicate VG name ustack_pv: Existing Q4qvP9-SpLc-Xm0p-Dxaq-zRHY-vwau-h8R1cY (created here) takes precedence over MocWLk-YfKd-3mFG-iU8Z-rFbj-QSR3-qoGXda

WARNING: Duplicate VG name ustack_pv: Existing Q4qvP9-SpLc-Xm0p-Dxaq-zRHY-vwau-h8R1cY (created here) takes precedence over MocWLk-YfKd-3mFG-iU8Z-rFbj-QSR3-qoGXda

WARNING: Duplicate VG name ustack_pv: Q4qvP9-SpLc-Xm0p-Dxaq-zRHY-vwau-h8R1cY (created here) takes precedence over MocWLk-YfKd-3mFG-iU8Z-rFbj-QSR3-qoGXda

--- Volume group ---

VG Name               ustack_pv

System ID

Format                lvm2

Metadata Areas1

Metadata Sequence No4

VG Access             read/write

VG Status             resizable

MAX LV0

Cur LV3

Open LV0

Max PV0

Cur PV1

Act PV1

VG Size472.03GiB

PE Size32.00MiB

Total PE15105

Alloc PE / Size15105/472.03GiB

Free  PE / Size0/0

VG UUID               MocWLk-YfKd-3mFG-iU8Z-rFbj-QSR3-qoGXda

WARNING: Duplicate VG name ustack_pv: Q4qvP9-SpLc-Xm0p-Dxaq-zRHY-vwau-h8R1cY (created here) takes precedence over MocWLk-YfKd-3mFG-iU8Z-rFbj-QSR3-qoGXda

--- Volume group ---

VG Name               ustack_pv

System ID

Format                lvm2

Metadata Areas1

Metadata Sequence No4

VG Access             read/write

VG Status             resizable

MAX LV0

Cur LV3

Open LV3

Max PV0

Cur PV1

Act PV1

VG Size472.03GiB

PE Size32.00MiB

Total PE15105

Alloc PE / Size15105/472.03GiB

Free  PE / Size0/0

VG UUID               Q4qvP9-SpLc-Xm0p-Dxaq-zRHY-vwau-h8R1cY

解决方案

LVM提供命令可以rename这个vg,改名后就可以识别里面的lv,重新挂在到新的服务器上了。

vgrename zOuHvA-QTBR-wNPs-3GIQ-b2zQ-yOeH-2fBS87 newvg

rename后所有lv都是not available状态,需要重置下vg状态才可以用。

lvchange -a y newvg

注意事项

运维组提醒,分区表写死了lv的路径,所以如果想把rename后的vg重新作为启动盘需要提前把名字改回去,或者改分区表。

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