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Extending A LUKS Encrypted HDD To Utilize All Of The Drive (500 GB) (lemmy.world)

submitted 1 week ago by irmadlad@lemmy.world to c/selfhosted@lemmy.world

17 comments fedilink hide all child comments

Operation:

sudo vgs: ubuntu-vg 1 1 0 wz--n- 462.69g 362.69g
df -T / : /dev/mapper/ubuntu--vg-ubuntu--lv ext4 102626232 24338224 73028744 25% /
sudo lvextend -l +100%FREE /dev/ubuntu-vg/ubuntu-lv
sudo resize2fs /dev/ubuntu-vg/ubuntu-lv

Never did this before on an encrypted drive. Is this the proper procedure? Obviously a complete image back up is in order, however, are there any gotchas, caveats, pitfalls that I should be aware of before proceeding?

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[–] tehfishman@lemmy.world 3 points 1 week ago (1 children)

Might be less confusing if you take a look at what you have with lsblk first. That might give you a better view of your existing disk layout so you know what you need to do. To your specific question though, I'm pretty sure resizing the LUKS volume is done with some sub-command in crypysetup. I'm not at a proper computer to check, but it's definitely in the man page.

All that assumes you have LUKS underneath LVM, which is fairly standard practice.

Hope that helps get you pointed in the right direction.

[–] irmadlad@lemmy.world 1 points 1 week ago (1 children)

Results of lsblk:

NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS

loop0 7:0 0 63.8M 1 loop /snap/core20/2866

loop1 7:1 0 63.9M 1 loop /snap/core20/2318

loop2 7:2 0 87M 1 loop /snap/lxd/29351

loop3 7:3 0 38.8M 1 loop /snap/snapd/21759

loop4 7:4 0 91.7M 1 loop /snap/lxd/38800

loop5 7:5 0 49.3M 1 loop /snap/snapd/26865

sda 8:0 0 465.8G 0 disk

├─sda1 8:1 0 1G 0 part /boot/efi

├─sda2 8:2 0 2G 0 part /boot

└─sda3 8:3 0 462.7G 0 part

└─dm_crypt-0 253:0 0 462.7G 0 crypt

└─ubuntu--vg-ubuntu--lv 253:1    0   100G  0 lvm   /

[–] NotEasyBeingGreen@slrpnk.net 1 points 1 week ago

Ah great. It looks like you have a mostly empty encrypted partition with LVM on top of it. If memory serves you might be able to resize the logical volume and the ext4 filesystem in a single command.