LVM : Manage Volume Groups2021/07/20 |
This is the basic operation of managing Volume Groups.
It needs to create Phisical Volumes first. |
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[1] | Create Volume Groups. |
[root@dlp ~]# vgcreate vg_dlp /dev/sdb1 Volume group "vg_dlp" successfully created # specify like follows if you'd like to use multiple devices [root@dlp ~]# vgcreate vg_dlp /dev/sdb1 /dev/sdd1 Volume group "vg_dlp" successfully created |
[2] | Display Volume Groups. |
[root@dlp ~]# vgdisplay vg_dlp --- Volume group --- VG Name vg_dlp System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 1 VG Access read/write VG Status resizable MAX LV 0 Cur LV 0 Open LV 0 Max PV 0 Cur PV 1 Act PV 1 VG Size <80.00 GiB PE Size 4.00 MiB Total PE 20479 Alloc PE / Size 0 / 0 Free PE / Size 20479 / <80.00 GiB VG UUID Zfj9Go-G0qK-qhVe-HVYi-SbeB-EX5X-w3VHrE |
[3] | Change Volume Groups' name. |
[root@dlp ~]# vgrename vg_dlp vg_data Volume group "vg_dlp" successfully renamed to "vg_data"[root@dlp ~]# vgdisplay vg_data --- Volume group --- VG Name vg_data System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 2 VG Access read/write VG Status resizable MAX LV 0 Cur LV 0 Open LV 0 Max PV 0 Cur PV 1 Act PV 1 VG Size <80.00 GiB PE Size 4.00 MiB Total PE 20479 Alloc PE / Size 0 / 0 Free PE / Size 20479 / <80.00 GiB VG UUID Zfj9Go-G0qK-qhVe-HVYi-SbeB-EX5X-w3VHrE |
[4] | Display reports of Volume Groups. |
[root@dlp ~]# vgs VG #PV #LV #SN Attr VSize VFree rl 1 2 0 wz--n- <29.00g 0 vg_data 1 0 0 wz--n- <80.00g <80.00g |
[5] | Scan Volume Groups. |
[root@dlp ~]# vgscan Found volume group "vg_data" using metadata type lvm2 Found volume group "rl" using metadata type lvm2 |
[6] | Extend Volume Groups. |
# add [sdc1] to [vg_data] [root@dlp ~]# vgextend vg_data /dev/sdc1 Volume group "vg_data" successfully extended[root@dlp ~]# vgdisplay vg_data --- Volume group --- VG Name vg_data System ID Format lvm2 Metadata Areas 2 Metadata Sequence No 3 VG Access read/write VG Status resizable MAX LV 0 Cur LV 0 Open LV 0 Max PV 0 Cur PV 2 Act PV 2 VG Size 159.99 GiB PE Size 4.00 MiB Total PE 40958 Alloc PE / Size 0 / 0 Free PE / Size 40958 / 159.99 GiB VG UUID Zfj9Go-G0qK-qhVe-HVYi-SbeB-EX5X-w3VHrE |
[7] | Reduce Volume Groups. |
# remove [sdc1] from [vg_data] [root@dlp ~]# vgreduce vg_data /dev/sdc1 Removed "/dev/sdc1" from volume group "vg_data"[root@dlp ~]# vgdisplay vg_data --- Volume group --- VG Name vg_data System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 4 VG Access read/write VG Status resizable MAX LV 0 Cur LV 0 Open LV 0 Max PV 0 Cur PV 1 Act PV 1 VG Size <80.00 GiB PE Size 4.00 MiB Total PE 20479 Alloc PE / Size 0 / 0 Free PE / Size 20479 / <80.00 GiB VG UUID Zfj9Go-G0qK-qhVe-HVYi-SbeB-EX5X-w3VHrE |
[8] | Delete Volume Groups. |
# disable target volume group first and delete it [root@dlp ~]# vgchange -a n vg_data 0 logical volume(s) in volume group "vg_data" now active[root@dlp ~]# vgremove vg_data Volume group "vg_data" successfully removed |
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