Failed unmounting home on reboot, dropped into emergency shell after.

twitmuck · 2023-03-13 17:27:36

I recently followed this guide: https://gist.github.com/huntrar/e42aee6 … d098c81268

on how to install Arch Linux with full disk encryption. However, whenever I want to reboot systemd fails to unmount /home, and after the reboot I am dropped into an emergency shell. The temporary fix for me, is to boot to a live arch ISO, mount the encrypted partitions, install grub, run grub-mkconfig -o and regenerate initramfs (mkinitcpio -p linux). After that, I can boot into the system just fine. However, I don't want to be doing this everytime I want to restart my machine. Is there a fix for this?

/etc/fstab

# /dev/mapper/vg-root
UUID=30f12a14-fa08-4634-9a2a-74c51c713eac	/         	ext4      	rw,noatime	0 1

# /dev/mapper/vg-home
UUID=972c0279-dbdf-4907-9e06-4c98a05d112b	/home     	ext4      	rw,noatime	0 2

# /dev/nvme0n1p2
UUID=2496-3216      	/efi      	vfat      	rw,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=ascii,shortname=mixed,utf8,errors=remount-ro	0 2

# /dev/mapper/vg-swap
UUID=6b76885b-e5bf-4551-8a54-73a9b3519c18	none      	swap      	defaults  	0 0

/etc/mkinitcpio.conf

# vim:set ft=sh
# MODULES
# The following modules are loaded before any boot hooks are
# run.  Advanced users may wish to specify all system modules
# in this array.  For instance:
#     MODULES=(usbhid xhci_hcd)
MODULES=()

# BINARIES
# This setting includes any additional binaries a given user may
# wish into the CPIO image.  This is run last, so it may be used to
# override the actual binaries included by a given hook
# BINARIES are dependency parsed, so you may safely ignore libraries
BINARIES=()

# FILES
# This setting is similar to BINARIES above, however, files are added
# as-is and are not parsed in any way.  This is useful for config files.
FILES=(/root/secrets/crypto_keyfile.bin)

# HOOKS
# This is the most important setting in this file.  The HOOKS control the
# modules and scripts added to the image, and what happens at boot time.
# Order is important, and it is recommended that you do not change the
# order in which HOOKS are added.  Run 'mkinitcpio -H <hook name>' for
# help on a given hook.
# 'base' is _required_ unless you know precisely what you are doing.
# 'udev' is _required_ in order to automatically load modules
# 'filesystems' is _required_ unless you specify your fs modules in MODULES
# Examples:
##   This setup specifies all modules in the MODULES setting above.
##   No RAID, lvm2, or encrypted root is needed.
#    HOOKS=(base)
#
##   This setup will autodetect all modules for your system and should
##   work as a sane default
#    HOOKS=(base udev autodetect modconf block filesystems fsck)
#
##   This setup will generate a 'full' image which supports most systems.
##   No autodetection is done.
#    HOOKS=(base udev modconf block filesystems fsck)
#
##   This setup assembles a mdadm array with an encrypted root file system.
##   Note: See 'mkinitcpio -H mdadm_udev' for more information on RAID devices.
#    HOOKS=(base udev modconf keyboard keymap consolefont block mdadm_udev encrypt filesystems fsck)
#
##   This setup loads an lvm2 volume group.
#    HOOKS=(base udev modconf block lvm2 filesystems fsck)
#
##   NOTE: If you have /usr on a separate partition, you MUST include the
#    usr and fsck hooks.
HOOKS=(base udev autodetect keyboard modconf block encrypt lvm2 filesystems fsck kms keymap consolefont)

# COMPRESSION
# Use this to compress the initramfs image. By default, zstd compression
# is used. Use 'cat' to create an uncompressed image.
#COMPRESSION="zstd"
#COMPRESSION="gzip"
#COMPRESSION="bzip2"
#COMPRESSION="lzma"
#COMPRESSION="xz"
#COMPRESSION="lzop"
#COMPRESSION="lz4"

# COMPRESSION_OPTIONS
# Additional options for the compressor
#COMPRESSION_OPTIONS=()

# MODULES_DECOMPRESS
# Decompress kernel modules during initramfs creation.
# Enable to speedup boot process, disable to save RAM
# during early userspace. Switch (yes/no).
#MODULES_DECOMPRESS="yes"

/etc/default/grub

# GRUB boot loader configuration

GRUB_DEFAULT=0
GRUB_TIMEOUT=5
GRUB_DISTRIBUTOR="Arch"
GRUB_CMDLINE_LINUX_DEFAULT="loglevel=3 quiet"
GRUB_CMDLINE_LINUX="cryptdevice=UUID=cbac59e2-1dce-4419-8dba-bc6fc0a16e18:cryptlvm root=/dev/vg/root cryptkey=rootfs:/root/secrets/crypto_keyfile.bin"

# Preload both GPT and MBR modules so that they are not missed
GRUB_PRELOAD_MODULES="part_gpt part_msdos"

# Uncomment to enable booting from LUKS encrypted devices
GRUB_ENABLE_CRYPTODISK=y

# Set to 'countdown' or 'hidden' to change timeout behavior,
# press ESC key to display menu.
GRUB_TIMEOUT_STYLE=menu

# Uncomment to use basic console
GRUB_TERMINAL_INPUT=console

# Uncomment to disable graphical terminal
#GRUB_TERMINAL_OUTPUT=console

# The resolution used on graphical terminal
# note that you can use only modes which your graphic card supports via VBE
# you can see them in real GRUB with the command `videoinfo'
GRUB_GFXMODE=auto

# Uncomment to allow the kernel use the same resolution used by grub
GRUB_GFXPAYLOAD_LINUX=keep

# Uncomment if you want GRUB to pass to the Linux kernel the old parameter
# format "root=/dev/xxx" instead of "root=/dev/disk/by-uuid/xxx"
#GRUB_DISABLE_LINUX_UUID=true

# Uncomment to disable generation of recovery mode menu entries
GRUB_DISABLE_RECOVERY=true

# Uncomment and set to the desired menu colors.  Used by normal and wallpaper
# modes only.  Entries specified as foreground/background.
#GRUB_COLOR_NORMAL="light-blue/black"
#GRUB_COLOR_HIGHLIGHT="light-cyan/blue"

# Uncomment one of them for the gfx desired, a image background or a gfxtheme
#GRUB_BACKGROUND="/path/to/wallpaper"
#GRUB_THEME="/path/to/gfxtheme"

# Uncomment to get a beep at GRUB start
#GRUB_INIT_TUNE="480 440 1"

# Uncomment to make GRUB remember the last selection. This requires
# setting 'GRUB_DEFAULT=saved' above.
#GRUB_SAVEDEFAULT=true

# Uncomment to disable submenus in boot menu
#GRUB_DISABLE_SUBMENU=y

# Probing for other operating systems is disabled for security reasons. Read
# documentation on GRUB_DISABLE_OS_PROBER, if still want to enable this
# functionality install os-prober and uncomment to detect and include other
# operating systems.
#GRUB_DISABLE_OS_PROBER=false

output of lsblk:

NAME          MAJ:MIN RM   SIZE RO TYPE  MOUNTPOINTS
nvme0n1       259:0    0 953.9G  0 disk  
├─nvme0n1p1   259:1    0     1M  0 part  
├─nvme0n1p2   259:2    0     1G  0 part  /efi
└─nvme0n1p3   259:3    0 952.9G  0 part  
  └─cryptlvm  254:0    0 952.9G  0 crypt 
    ├─vg-swap 254:1    0     8G  0 lvm   [SWAP]
    ├─vg-root 254:2    0   100G  0 lvm   /
    └─vg-home 254:3    0 844.9G  0 lvm   /home

Output of blkid /dev/nvme0n1p3:

sudo blkid /dev/nvme0n1p3
/dev/nvme0n1p3: UUID="cbac59e2-1dce-4419-8dba-bc6fc0a16e18" TYPE="crypto_LUKS" PARTLABEL="Linux LUKS" PARTUUID="95755267-b13c-4562-a162-18e69f4e5331"

Roken · 2023-03-13 17:52:53

You probably won't get much help here. Use the official installation guide, and for full disk encryption, see https://wiki.archlinux.org/title/Dm-cry … ire_system

Arch Linux

#1 2023-03-13 17:27:36

Failed unmounting home on reboot, dropped into emergency shell after.

#2 2023-03-13 17:52:53

Re: Failed unmounting home on reboot, dropped into emergency shell after.

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