LXC resize ubuntu guest

G

gob

Renowned Member
Aug 4, 2011
69
2
73
Chesterfield, United Kingdom
Hi

I have been trying to resize an ubuntu 14.04 LXC for several hours now and it's getting a little frustrating.
The original container was set up as 64Gb and I have extended it to 320Gb on my 4.0-48 host.
The backend storage is LVM on a DELL iSCSI SAN.

In the proxmox Web gui if I browse my storage I can see:
Code: 
vm-315-disk-1   raw   32.00GB

However if I run df -h in the container I get

Code: 
Filesystem                       Size  Used Avail Use% Mounted on
/dev/MD3000iA-SAS/vm-315-disk-1   63G   38G   22G  64% /
none                             100K  4.0K   96K   4% /dev
cgroup                            12K     0   12K   0% /sys/fs/cgroup
tmpfs                            7.9G     0  7.9G   0% /sys/fs/cgroup/cgmanager
none                             1.6G  244K  1.6G   1% /run
none                             5.0M     0  5.0M   0% /run/lock
none                             7.9G  8.0K  7.9G   1% /run/shm
none                             100M     0  100M   0% /run/user

So as an attempt to extend the container I run:

Code: 
# resize2fs /dev/MD3000iA-SAS/vm-315-disk-1
resize2fs 1.42.12 (29-Aug-2014)
resize2fs: Device or resource busy while trying to open /dev/MD3000iA-SAS/vm-315-disk-1
Couldn't find valid filesystem superblock.

Assuming this is because the container is running, I shutdown the container and try again however once the container is shut down, vm-315-disk-1 disappears from /dev/MD3000iA-SAS/

Any suggestions?

thanks
 
Thanks for your prompt reply Dietmar.

Running the following whilst the container is running has no effect:
Code: 
pct resize 315 rootfs 320G

Running when the container is shutdown produces:

Code: 
# pct resize 315 rootfs 320G
qemu-img: Could not open '/dev/MD3000iA-SAS/vm-315-disk-1': Could not open '/dev/MD3000iA-SAS/vm-315-disk-1': No such file or directory
  New size (81920 extents) matches existing size (81920 extents)
error resizing volume '/dev/MD3000iA-SAS/vm-315-disk-1':   Run `lvextend --help' for more information.

I am still getting this in the container:

Code: 
# df -h
Filesystem                       Size  Used Avail Use% Mounted on
/dev/MD3000iA-SAS/vm-315-disk-1   63G   38G   22G  64% /
none                             100K  4.0K   96K   4% /dev
cgroup                            12K     0   12K   0% /sys/fs/cgroup
tmpfs                            7.9G     0  7.9G   0% /sys/fs/cgroup/cgmanager
none                             1.6G  244K  1.6G   1% /run
none                             5.0M     0  5.0M   0% /run/lock
none                             7.9G  8.0K  7.9G   1% /run/shm
none                             100M     0  100M   0% /run/user
 
it is lvm on an iSCSI target:
Code: 
dir: local
        path /var/lib/vz
        content images,vztmpl,rootdir,backup,iso
        maxfiles 0

lvm: MD3000i-A-SAS
        vgname MD3000iA-SAS
        content images,rootdir
        nodes ms-200-prox01,ms-200-prox02
        shared

lvm: MD3000i-A-SATA
        vgname MD3000iA-SATA
        content rootdir,images
        nodes ms-200-prox02,ms-200-prox01
        shared

nfs: NFS-Bak
        path /mnt/pve/NFS-Bak
        export /raid0/data/Prox-Backup
        server 192.168.200.15
        maxfiles 2
        options vers=3
        content iso,backup,vztmpl
 
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