I am running a proxmox server with several virtual machines and noticed that I have more disk space configured on the virtual machines then I have on the partition they are running on. Here are the steps I took to increase the size of the ext3 partition hosting the vms.
- View the mount points to determine what logical volume the vms are on
~# mount
/dev/pve/root on / type ext3 (rw,errors=remount-ro)
tmpfs on /lib/init/rw type tmpfs (rw,nosuid,mode=0755)
proc on /proc type proc (rw,noexec,nosuid,nodev)
sysfs on /sys type sysfs (rw,noexec,nosuid,nodev)
procbususb on /proc/bus/usb type usbfs (rw)
udev on /dev type tmpfs (rw,mode=0755)
tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev)
devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=620)
/dev/mapper/pve-data on /var/lib/vz type ext3 (rw)
/dev/cciss/c0d0p1 on /boot type ext3 (rw)
- View the logical volume to determine what volume group it is on:
~# lvdisplay /dev/mapper/pve-data
--- Logical volume ---
LV Name /dev/pve/data
VG Name pve
- View the volume group to be sure there is room for expansion:
~# vgdisplay pve
--- Volume group ---
VG Name pve
System ID
Format lvm2
Metadata Areas 2
Metadata Sequence No 2236
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 3
Open LV 3
Max PV 0
Cur PV 2
Act PV 2
VG Size 477.93 GB
PE Size 4.00 MB
Total PE 122351
Alloc PE / Size 44928 / 175.50 GB
Free PE / Size 77423 / 302.43 GB
VG UUID ThGaW0-KPoF-ZA3V-jgxE-zv6d-jaMY-Pc8Y1W
- Extend the logical volume (-L flag as used below allows you to specify the new size of the volume):
~# lvextend -L150G /dev/pve/data
Extending logical volume root to 150.00 GB
Logical volume root successfully resized
- Resize the ext3 partition
~# resize2fs /dev/pve/data
resize2fs 1.41.3 (12-Oct-2008)
Filesystem at /dev/pve/data is mounted on /var/lib/vz; on-line resizing required
old desc_blocks = 4, new_desc_blocks = 10
Performing an on-line resize of /dev/pve/data to 39321600 (4k) blocks.
The filesystem on /dev/pve/data is now 39321600 blocks long.
Pretty easy.
