[SOLVED] Disk encryption issues

ZetaRevan · 2022-10-25 22:27:25

Hello guys,
I need some help on a recent Arch install. This is my first time doing LVM on LUKS and I can't seem to get GRUB to run cryptsetup to decrypt my sda2 partition. It times out waiting for my LVM maps, which aren't visible since the main /dev/sda2 partition hasn't been opened. I followed the offical wiki page for LVM on LUKS & used the systemd / sd-encrypt hooks along with plugging in `rd.luks.name=device-UUID=SFcrypt root=/dev/StarForge/root` in my grub.cfg file. Any advice would be super helpful!

Z

Last edited by ZetaRevan (2022-10-27 00:56:08)

Slithery · 2022-10-25 22:35:00

Post the output of your HOOKS line in /etc/mkinitcpio.conf

ZetaRevan · 2022-10-25 22:37:49

HOOKS=(base systemd autodetect keyboard modconf block sd-encrypt lvm2 filesystems fsck)

Last edited by ZetaRevan (2022-10-25 22:38:35)

cfr · 2022-10-26 03:22:12

What's in grub.cfg?

astralc · 2022-10-26 06:03:31

did you substitute device-UUID to the actual luks UUID?

ZetaRevan · 2022-10-26 07:03:41

cfr wrote:

What's in grub.cfg?

Standard grub config file, has root=/dev/mapper/Starforge-root on the menu entries.

astralc wrote:

did you substitute device-UUID to the actual luks UUID?

Yes. I've tried having that line in the 40-custom section & also right above the menu entries. Still get the same result.

Ugh...I was starting to think I had the crypt packages, but now I have to confirm. I just realized that I run cryptsetup to open the partiion when booted from the USB, but did I actually make sure the package was installed on my drive? More digging.

Note, I have a current build on another laptop with LUKS on LVM that works fine.

Last edited by ZetaRevan (2022-10-26 07:31:14)

ZetaRevan · 2022-10-26 07:28:48

Well it was already installed so that's not the issue.

grub.cfg
The commented rd.luks line has an uncommented version below it in the custom section.

Last edited by ZetaRevan (2022-10-26 07:32:36)

cfr · 2022-10-26 13:58:07

This doesn't seem to appear (uncommented) in your grub.cfg:

rd.luks.name=device-UUID=SFcrypt

How are your partitions organised?

ZetaRevan · 2022-10-26 23:37:02

This doesn't seem to appear (uncommented) in your grub.cfg:

Yeah that's because I couldn't get enough on the screen, but I have that same line uncommented inside the 40_custom section. It doesn't decrypt being put in either location.

How are your partitions organised?

/dev/sda1 mounts to /boot (unencrypted)

/dev/sda2 is encrypted, so it should map to /dev/mapper/SFcrypt after being opened for the LVM setup

PV = /dev/mapper/SFcrypt
VG = StarForge
LVs = root, home (set up as xfs on both)

No swap partition, I plan to use zswap.

Last edited by ZetaRevan (2022-10-27 00:12:33)

cfr · 2022-10-27 00:18:56

If those are the menu entries you're trying to boot, the rd.luks isn't there. You can check this by choosing to edit the command line when you boot and seeing if it is there. If it isn't, you can add it and boot, though the addition won't be permanent.

ZetaRevan · 2022-10-27 00:45:37

cfr wrote:

If those are the menu entries you're trying to boot, the rd.luks isn't there. You can check this by choosing to edit the command line when you boot and seeing if it is there. If it isn't, you can add it and boot, though the addition won't be permanent.

huh..I don't remember having to add it inline on my LUKS on LVM build, and I don't have it on hand to check, but that did the trick. I removed the separate lines & just added the rd.luks inline before the root= & it worked. Thanks for the guidance!

Arch Linux

#1 2022-10-25 22:27:25

[SOLVED] Disk encryption issues

#2 2022-10-25 22:35:00

Re: [SOLVED] Disk encryption issues

#3 2022-10-25 22:37:49

Re: [SOLVED] Disk encryption issues

#4 2022-10-26 03:22:12

Re: [SOLVED] Disk encryption issues

#5 2022-10-26 06:03:31

Re: [SOLVED] Disk encryption issues

#6 2022-10-26 07:03:41

Re: [SOLVED] Disk encryption issues

#7 2022-10-26 07:28:48

Re: [SOLVED] Disk encryption issues

#8 2022-10-26 13:58:07

Re: [SOLVED] Disk encryption issues

#9 2022-10-26 23:37:02

Re: [SOLVED] Disk encryption issues

#10 2022-10-27 00:18:56

Re: [SOLVED] Disk encryption issues

#11 2022-10-27 00:45:37

Re: [SOLVED] Disk encryption issues

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