Ubuntu Help - Boot Problem #N00b

[Sebastian Roth]

@RogerBrownTDL On the long run you need to look into purging some of the images and/or extending the disk space.

The other outputs you posted show that the root partition (LVM) really is only 100 GB in size while the whole VMDK container is 500 GB.

Extending the space is a bit more advanced but should be possible for you to achieve as well because things seem to be prepared already. After the reboot of the VM run the following commands and post output here:

pvs
vgs
lvs

[RogerBrownTDL]

@Sebastian-Roth said in Ubuntu Help - Boot Problem #N00b:

lvs
Output is as follows:

root@tie-fogdeploy-01:~# pvs
  PV         VG        Fmt  Attr PSize    PFree
  /dev/sda3  ubuntu-vg lvm2 a--  <498.00g <398.00g

root@tie-fogdeploy-01:~# lvs
  LV        VG        Attr       LSize   Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  ubuntu-lv ubuntu-vg -wi-ao---- 100.00g                                        

root@tie-fogdeploy-01:~# vgs
  VG        #PV #LV #SN Attr   VSize    VFree
  ubuntu-vg   1   1   0 wz--n- <498.00g <398.00g
root@tie-fogdeploy-01:~#

[lukebarone]

@RogerBrownTDL

lvextend -L +398g ubuntu-lv --resizefs

You may need to reboot for it to take effect. This will use all the remaining LVM volume space for your logical volume. You can’t go smaller after the fact, so be sure you want to use it all first.

[RogerBrownTDL]

@lukebarone said in Ubuntu Help - Boot Problem #N00b:

lvextend -L +398g ubuntu-lv --resizefs

to confirm, this will mean I can actually use the box to it’s full 500gb drive allocation?

[lukebarone]

@RogerBrownTDL Yes.

lvextend - Increase the volume size
-L - Specify the size to increase it by
ubuntu-lv - The name of your logical volume (as reported)
--resizefs - Resize the EXT{2|3|4} file system

[RogerBrownTDL]

@lukebarone

In which case based on the output here:
root@tie-fogdeploy-01:~# pvs
PV VG Fmt Attr PSize PFree
/dev/sda3 ubuntu-vg lvm2 a-- <498.00g <398.00g
root@tie-fogdeploy-01:~# lvs
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
ubuntu-lv ubuntu-vg -wi-ao---- 100.00g
root@tie-fogdeploy-01:~# vgs
VG #PV #LV #SN Attr VSize VFree
ubuntu-vg 1 1 0 wz–n- <498.00g <398.00g
root@tie-fogdeploy-01:~# lvextend -L +398g ubuntu-lv --resizefs
Please specify a logical volume path.
Run `lvextend --help’ for more information.
root@tie-fogdeploy-01:~#

Would it be lvextend -L +398g ubuntu-vg --resizefs ?

[lukebarone]

@RogerBrownTDL Try this instead:

lvextend -L +398g ubuntu-vg/ubuntu-lv --resizefs

[RogerBrownTDL]

@lukebarone response: root@tie-fogdeploy-01:~# lvextend -L +398g ubuntu-vg/ubuntu-lv --resizefs
Insufficient free space: 101888 extents needed, but only 101887 available
root@tie-fogdeploy-01:~#

[RogerBrownTDL]

@lukebarone thoughts?

[Sebastian Roth]

@lukebarone I am wondering if it’s wise to create another volume instead of extending the existing one. This way the images could be put on the separate volume/partition and would not be able to fill the root partition. But that’s just me trying to prevent this from happening again.

The downside of my proposal is that the existing 100 GB root partition can’t be used by images and therefore are kind of wasted because the FOG server itself will never use 100 GB disk space with the images on a separate partition.

So maybe it’s actually wise to just extend as proposed and @RogerBrownTDL needs to keep an eye on the disk space from now on.

So if you wanna go this path, do:

lvextend --extents +100%FREE ubuntu-vg/ubuntu-lv --resizefs

[RogerBrownTDL]

@Sebastian-Roth So obviously as a Linux noob, I know very little… I’m purely (I know, insert puke emoji here) a Windows Sysadmin. If I understand it correctly the way i’ve got it setup is like having a single big C:\ and all i’m wanting to do is get the entire fog server to see it all rather than just a partition of it… If I follow that command
“lvextend --extents +100%FREE ubuntu-vg/ubuntu-lv --resizefs”
Will it do that so that the full 500gb would be visible and the images stored remain intact?

[Sebastian Roth]

@RogerBrownTDL said in Ubuntu Help - Boot Problem #N00b:

Will it do that so that the full 500gb would be visible and the images stored remain intact?

Yes! Although I am not a 100% sure the filesystem resize (to full size) will work while the system is running. Should work but I can’t promise you it will. As well just for safety reasons I always suggest for people to take a backup copy before doing these kind of operations on a production server. Should be really easy taking a snapshot in Hyper-V before going ahead.

The other option I was talking about would be like adding a D:\ drive and moving all the images to that new partition. As I said it’s wise on the one hand so images can’t fill up your important C:\ drive (with the database on it) but on the other side you waste free space on C:…

[RogerBrownTDL]

@Sebastian-Roth further info print i’ve got if this makes more sense:
root@tie-fogdeploy-01:~# sudo parted /dev/sda unit MiB print
Model: Msft Virtual Disk (scsi)
Disk /dev/sda: 512000MiB
Sector size (logical/physical): 512B/4096B
Partition Table: gpt
Disk Flags:

Number Start End Size File system Name Flags
1 1.00MiB 2.00MiB 1.00MiB bios_grub
2 2.00MiB 2050MiB 2048MiB ext4
3 2050MiB 511999MiB 509949MiB

If the system isnt running, surely I wouldnt be able to do anything, so it needs to be online?

[Sebastian Roth]

@RogerBrownTDL said in Ubuntu Help - Boot Problem #N00b:

If the system isnt running, surely I wouldnt be able to do anything, so it needs to be online?

Well, you can boot into a Live Linux ISO (Ubuntu or many others) to get to a command shell and do such things with the OS on disk not running. But I think you are fine doing it live after taking a snapshot backup.

[RogerBrownTDL]

@Sebastian-Roth Thanks my friend, snapshot taken in hyper-v and command run… Stupid Q now. How do I check if it’s worked

[Sebastian Roth]

@RogerBrownTDL Reboot and take a look at the disk space with df -h.

[RogerBrownTDL]

@Sebastian-Roth root@tie-fogdeploy-01:~# df -h
Filesystem Size Used Avail Use% Mounted on
udev 5.7G 0 5.7G 0% /dev
tmpfs 1.2G 1.1M 1.2G 1% /run
/dev/mapper/ubuntu–vg-ubuntu–lv 490G 86G 384G 19% /
tmpfs 5.8G 0 5.8G 0% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs 5.8G 0 5.8G 0% /sys/fs/cgroup
/dev/loop0 92M 92M 0 100% /snap/lxd/23991
/dev/loop4 50M 50M 0 100% /snap/snapd/17950
/dev/loop2 92M 92M 0 100% /snap/lxd/24061
/dev/loop3 64M 64M 0 100% /snap/core20/1778
/dev/loop1 64M 64M 0 100% /snap/core20/1822
/dev/loop5 50M 50M 0 100% /snap/snapd/18357
/dev/sda2 2.0G 207M 1.6G 12% /boot
tmpfs 1.2G 0 1.2G 0% /run/user/0
root@tie-fogdeploy-01:~#
i’m guessing /dev/mapper/ubuntu–vg-ubuntu–lv 490G 86G 384G 19% / means its worked?

[Sebastian Roth]

@RogerBrownTDL said in Ubuntu Help - Boot Problem #N00b:

Filesystem                         Size  Used Avail Use% Mounted on
udev                               5.7G     0  5.7G   0% /dev
tmpfs                              1.2G  1.1M  1.2G   1% /run
/dev/mapper/ubuntu–vg-ubuntu–lv    490G   86G  384G  19% /

Nice, that looks great.

Marking as fixed.

[RogerBrownTDL]

@Sebastian-Roth Thanks friend Legendary!

[lukebarone]

@Sebastian-Roth I didn’t know about the 100% option - I like that!