I Installed proxmox environment on Intel 240GB SSD. Installation take the whole disk for lvm. So I need to reduce the used space and create a new partition for drbd.
This is my disk. You can see, that the disk is full allocated with 171G free.
root@pve1:/# gdisk -l /dev/sda Disk /dev/sda: 468862128 sectors, 223.6 GiB Number Start (sector) End (sector) Size Code Name 1 34 2047 1007.0 KiB EF02 2 2048 262143 127.0 MiB EF00 3 262144 111411199 53.0 GiB 8E00 Linux LVM
root@pve1:/# pvs PV VG Fmt Attr PSize PFree /dev/sda3 pve lvm2 a-- 223.44g 171.44g
root@pve1:/# vgs VG #PV #LV #SN Attr VSize VFree pve 1 3 0 wz--n- 223.44g 171.44g
root@pve1:/# lvs LV VG Attr LSize Pool Origin Data% Move Log Copy% Convert data pve -wi-ao--- 40.00g root pve -wi-ao--- 10.00g swap pve -wi-ao--- 2.00g
So, we list our logical volumes with segments on physical volume /dev/sda3:
root@pve1:/# pvs -v --segments /dev/sda3 Using physical volume(s) on command line PV VG Fmt Attr PSize PFree Start SSize LV Start Type PE Ranges /dev/sda3 pve lvm2 a-- 223.44g 171.44g 0 512 swap 0 linear /dev/sda3:0-511 /dev/sda3 pve lvm2 a-- 223.44g 171.44g 512 2560 root 0 linear /dev/sda3:512-3071 /dev/sda3 pve lvm2 a-- 223.44g 171.44g 3072 10240 data 0 linear /dev/sda3:3072-13311 /dev/sda3 pve lvm2 a-- 223.44g 171.44g 13312 43889 0 free
We can see, the size of PV is 223,44G and we have free 171,44G. So, we must shrink this physical volume about 171,44G. So compute the space for size of this physical volume: 223,44 – 171,44 = 52G. So, our PV must have at least 52G. Next, we resize this pv:
root@pve1:/# pvresize --setphysicalvolumesize 52G /dev/sda3 /dev/sda3: cannot resize to 13311 extents as 13312 are allocated. 0 physical volume(s) resized / 1 physical volume(s) not resized root@pve1:/# pvresize --setphysicalvolumesize 52.1G /dev/sda3 Physical volume "/dev/sda3" changed 1 physical volume(s) resized / 0 physical volume(s) not resized
As we can see, we cannost shrink exact to this space. So we add 100M and use the 52,1G size. Now we can see:
root@pve1:/# pvs -v --segments /dev/sda3 Using physical volume(s) on command line PV VG Fmt Attr PSize PFree Start SSize LV Start Type PE Ranges /dev/sda3 pve lvm2 a-- 52.10g 100.00m 0 512 swap 0 linear /dev/sda3:0-511 /dev/sda3 pve lvm2 a-- 52.10g 100.00m 512 2560 root 0 linear /dev/sda3:512-3071 /dev/sda3 pve lvm2 a-- 52.10g 100.00m 3072 10240 data 0 linear /dev/sda3:3072-13311 /dev/sda3 pve lvm2 a-- 52.10g 100.00m 13312 25 0 free
At this point, we must work on the lowest layer of disk, so we must delete this partition and create a new one. The new partition must start on the same sector as previous and the last sector must be after last segment of physical volume. I use gdisk, because my disk have GPT partition table:
root@pve1:/# gdisk /dev/sda Command (? for help): p Disk /dev/sda: 468862128 sectors, 223.6 GiB Logical sector size: 512 bytes First usable sector is 34, last usable sector is 468862094 Number Start (sector) End (sector) Size Code Name 1 34 2047 1007.0 KiB EF02 2 2048 262143 127.0 MiB EF00 3 262144 468862094 223.4 GiB 8E00 Command (? for help): d Partition number (1-3): 3 Command (? for help): n Partition number (3-128, default 3): First sector (262144-468862094, default = 262144) or {+-}size{KMGTP}: Last sector (262144-468862094, default = 468862094) or {+-}size{KMGTP}: +53G Current type is 'Linux filesystem' Hex code or GUID (L to show codes, Enter = 8300): 8E00 Changed type of partition to 'Linux LVM' Command (? for help): p Disk /dev/sda: 468862128 sectors, 223.6 GiB Total free space is 357450895 sectors (170.4 GiB) Number Start (sector) End (sector) Size Code Name 1 34 2047 1007.0 KiB EF02 2 2048 262143 127.0 MiB EF00 3 262144 111411199 53.0 GiB 8E00 Linux LVM Command (? for help): w Final checks complete. About to write GPT data. THIS WILL OVERWRITE EXISTING PARTITIONS!! Do you want to proceed? (Y/N): y OK; writing new GUID partition table (GPT) to /dev/sda. Warning: The kernel is still using the old partition table. The new table will be used at the next reboot. The operation has completed successfully.
Now, we must reboot our computer to use new partition table. And after reboot, use this command to resize physical volume on partition /dev/sda3
root@pve1:/# pvresize /dev/sda3 Physical volume "/dev/sda3" changed 1 physical volume(s) resized / 0 physical volume(s) not resized root@pve1:/# pvs PV VG Fmt Attr PSize PFree /dev/sda3 pve lvm2 a-- 53.00g 1020.00m
Now, if we can use all of free space for the logical volume “data”, we can resize it to whole free space, like this:
root@pve1:/# lvresize /dev/pve/data -l +100%FREE Extending logical volume data to 41.00 GiB Logical volume data successfully resized
root@pve1:/# lvs LV VG Attr LSize Pool Origin Data% Move Log Copy% Convert data pve -wi-ao--- 41.00g root pve -wi-ao--- 10.00g swap pve -wi-ao--- 2.00g
root@pve1:/# pvs PV VG Fmt Attr PSize PFree /dev/sda3 pve lvm2 a-- 53.00g 0
Now, we can create a new partition at the end of disk:
gdisk /dev/sda Command (? for help): p Disk /dev/sda: 468862128 sectors, 223.6 GiB Logical sector size: 512 bytes Number Start (sector) End (sector) Size Code Name 1 34 2047 1007.0 KiB EF02 2 2048 262143 127.0 MiB EF00 3 262144 111411199 53.0 GiB 8E00 Linux LVM Command (? for help): n Partition number (4-128, default 4): First sector (111411200-468862094, default = 111411200) or {+-}size{KMGTP}: Last sector (111411200-468862094, default = 468862094) or {+-}size{KMGTP}: Current type is 'Linux filesystem' Hex code or GUID (L to show codes, Enter = 8300): Changed type of partition to 'Linux filesystem' Command (? for help): w Final checks complete. About to write GPT data. THIS WILL OVERWRITE EXISTING PARTITIONS!! Do you want to proceed? (Y/N): y OK; writing new GUID partition table (GPT) to /dev/sda. Warning: The kernel is still using the old partition table. The new table will be used at the next reboot. The operation has completed successfully.
root@pve1:~# gdisk -l /dev/sda Number Start (sector) End (sector) Size Code Name 1 34 2047 1007.0 KiB EF02 2 2048 262143 127.0 MiB EF00 3 262144 111411199 53.0 GiB 8E00 Linux LVM 4 111411200 468862094 170.4 GiB 8300 Linux filesystem
And if we list details about physical volume, we can see, that there is no free space:
root@pve1:~# pvs -v --segments /dev/sda3 Using physical volume(s) on command line PV VG Fmt Attr PSize PFree Start SSize LV Start Type PE Ranges /dev/sda3 pve lvm2 a-- 53.00g 0 0 512 swap 0 linear /dev/sda3:0-511 /dev/sda3 pve lvm2 a-- 53.00g 0 512 2560 root 0 linear /dev/sda3:512-3071 /dev/sda3 pve lvm2 a-- 53.00g 0 3072 10495 data 0 linear /dev/sda3:3072-13566
And what is drbd, you can see in another post on my page. Have a fun.