Moving space with LVM

mrvenkman · October 23, 2020, 8:01am

Hi,

I have an entire physical volume “vg1” that has ~124GB of un-allocated space. There is hardly any space left in my /dev/fedora_localhost-live/home logical volume.

How would I go about moving 60GB from vg1 to /dev/fedora_localhost-live/home, therefore enlarging my home by 60GB. Without losing data.

Any help is appreciated!

[root@localhost ~]# sudo vgs; sudo pvs; sudo lvs
VG                    #PV #LV #SN Attr   VSize   VFree  
fedora_localhost-live   1   3   0 wz--n-  99.59g      0 
vg1                     1   0   0 wz--n- 124.86g 124.86g
PV             VG                    Fmt  Attr PSize   PFree  
/dev/nvme0n1p7 fedora_localhost-live lvm2 a--   99.59g      0 
/dev/nvme0n1p9 vg1                   lvm2 a--  124.86g 124.86g
LV   VG                    Attr       LSize   Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
home fedora_localhost-live -wi-ao---- <30.73g                                                    
root fedora_localhost-live -wi-ao----  62.93g                                                    
swap fedora_localhost-live -wi-ao----   5.93g                                                    
[root@localhost ~]# pvdisplay
--- Physical volume ---
PV Name               /dev/nvme0n1p9
VG Name               vg1
PV Size               <124.87 GiB / not usable 2.00 MiB
Allocatable           yes 
PE Size               4.00 MiB
Total PE              31965
Free PE               31965
Allocated PE          0
PV UUID               qBu61a-R0Gi-YAo1-n52i-aJL1-6XWx-icFYb7

--- Physical volume ---
PV Name               /dev/nvme0n1p7
VG Name               fedora_localhost-live
PV Size               <99.60 GiB / not usable 3.00 MiB
Allocatable           yes (but full)
PE Size               4.00 MiB
Total PE              25496
Free PE               0
Allocated PE          25496
PV UUID               SlkUos-ROOb-A8r2-nBk8-ytc5-NNMz-zGBrnh

[root@localhost ~]# vgdisplay
--- Volume group ---
VG Name               vg1
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               124.86 GiB
PE Size               4.00 MiB
Total PE              31965
Alloc PE / Size       0 / 0   
Free  PE / Size       31965 / 124.86 GiB
VG UUID               8qcmDW-nMSC-XA7M-GZUQ-ZiEM-3ytl-zjGcYn

--- Volume group ---
VG Name               fedora_localhost-live
System ID             
Format                lvm2
Metadata Areas        1
Metadata Sequence No  4
VG Access             read/write
VG Status             resizable
MAX LV                0
Cur LV                3
Open LV               3
Max PV                0
Cur PV                1
Act PV                1
VG Size               99.59 GiB
PE Size               4.00 MiB
Total PE              25496
Alloc PE / Size       25496 / 99.59 GiB
Free  PE / Size       0 / 0   
VG UUID               scIlUo-fUMz-53LK-gMxW-Qmp4-0aAX-RJsnqg

[root@localhost ~]# lvdisplay
--- Logical volume ---
LV Path                /dev/fedora_localhost-live/swap
LV Name                swap
VG Name                fedora_localhost-live
LV UUID                8waDYN-AzPx-qddH-v1KY-b7TO-PGzI-tstylP
LV Write Access        read/write
LV Creation host, time localhost-live, 2020-04-28 01:09:04 +0100
LV Status              available
# open                 2
LV Size                5.93 GiB
Current LE             1519
Segments               1
Allocation             inherit
Read ahead sectors     auto
- currently set to     256
Block device           253:1

--- Logical volume ---
LV Path                /dev/fedora_localhost-live/home
LV Name                home
VG Name                fedora_localhost-live
LV UUID                cxVG4h-Q8wI-rSm2-dGAL-SwDc-pGvN-Kpg3Fm
LV Write Access        read/write
LV Creation host, time localhost-live, 2020-04-28 01:09:05 +0100
LV Status              available
# open                 1
LV Size                <30.73 GiB
Current LE             7866
Segments               1
Allocation             inherit
Read ahead sectors     auto
- currently set to     256
Block device           253:2

--- Logical volume ---
LV Path                /dev/fedora_localhost-live/root
LV Name                root
VG Name                fedora_localhost-live
LV UUID                eTajTR-THWa-00yZ-FqbR-l7Vp-06Oq-Z3aEYg
LV Write Access        read/write
LV Creation host, time localhost-live, 2020-04-28 01:09:05 +0100
LV Status              available
# open                 1
LV Size                62.93 GiB
Current LE             16111
Segments               1
Allocation             inherit
Read ahead sectors     auto
- currently set to     256
Block device           253:0

augenauf · October 23, 2020, 9:03am

Does this topic help?

https://discussion.fedoraproject.org/t/reclaim-home-unsized-change/75814/

mrvenkman · October 23, 2020, 10:08am

Hi. Yes it gave me some pointers, thank you.

As you can see from my post, I have a volume group in the physical volume that I want to move space from:

VG Name               vg1
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               124.86 GiB
PE Size               4.00 MiB
Total PE              31965
Alloc PE / Size       0 / 0   
Free  PE / Size       31965 / 124.86 GiB
VG UUID               8qcmDW-nMSC-XA7M-GZUQ-ZiEM-3ytl-zjGcYn

Am I to understand that I will have to create a logical volume within that group before I am able to transfer the space within it to /dev/fedora_localhost-live/home?

vgaetera · October 23, 2020, 10:20am

The second VG has no LVs.
Remove the empty VG and reassign its PV to the main VG.
Then you should be able to extend LV using extra PV space.

mrvenkman · October 23, 2020, 10:30am

Cool.
So I did:

[root@localhost ~]# vgchange -an vg1
  0 logical volume(s) in volume group "vg1" now active
[root@localhost ~]# vgremove vg1
  Volume group "vg1" successfully removed

To remove the volume group. Then to check:

[root@localhost ~]# vgs;
  VG                    #PV #LV #SN Attr   VSize  VFree
  fedora_localhost-live   1   3   0 wz--n- 99.59g    0 
[root@localhost ~]# pvs;
  PV             VG                    Fmt  Attr PSize    PFree   
  /dev/nvme0n1p7 fedora_localhost-live lvm2 a--    99.59g       0 
  /dev/nvme0n1p9                       lvm2 ---  <124.87g <124.87g

And then to assign the physical volume to the volume group I wanted:

[root@localhost ~]# vgextend fedora_localhost-live /dev/nvme0n1p9 
  Volume group "fedora_localhost-live" successfully extended
[root@localhost ~]# vgs;
  VG                    #PV #LV #SN Attr   VSize    VFree  
  fedora_localhost-live   2   3   0 wz--n- <224.46g 124.86g

Thanks!

system · November 20, 2020, 10:30am

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