Package: initramfs-tools
Version: 0.130
Severity: wishlist
Tags: patch
Dear Maintainer,
when connecting to the InitRAMFS via network (e.g. encrypted root fs), then it
is
helpful if the machine can be registered by its name in the DNS, making it
possible
to connect to it via its DNS name. Otherwise you have to look up the assigned
ip in
the DHCP server log.
Therefore please provide a config and hook that dynamically sets the host name
on InitRAMFS creation.
My current workaround consists of a simple config file and a simple hook script:
/etc/initramfs-tools/conf.d/network
/etc/initramfs-tools/hooks/set_hostname_in_network_config.sh
This workaround is easy to use on any machine without manually editing the host
name
on installation or whenever it changes. Also avoiding typos of the host name.
Additionally it gives an explicit point where to define your network
configuration
for InitRAMFS-only (not as a kernel command line).
Would be great if you could consider adding this to the package.
Kind regards
Maddes
-- Package-specific info:
-- initramfs sizes
-rw------- 1 root root 18M Jul 8 13:51 /boot/initrd.img-4.9.0-3-amd64
-- /proc/cmdline
BOOT_IMAGE=/boot/vmlinuz-4.9.0-3-amd64 root=/dev/sda1 ro quiet
-- resume
RESUME=UUID=6c849bd6-03b5-4464-9ffe-6a8601f3f23e
-- /proc/filesystems
ext3
ext2
ext4
-- lsmod
Module Size Used by
crct10dif_pclmul 16384 0
crc32_pclmul 16384 0
ghash_clmulni_intel 16384 0
ppdev 20480 0
pcspkr 16384 0
vmw_balloon 20480 0
intel_rapl_perf 16384 0
joydev 20480 0
evdev 24576 1
serio_raw 16384 0
sg 32768 0
parport_pc 28672 0
vmwgfx 237568 1
battery 20480 0
shpchp 36864 0
parport 49152 2 parport_pc,ppdev
acpi_cpufreq 20480 0
ttm 98304 1 vmwgfx
drm_kms_helper 155648 1 vmwgfx
vmw_vmci 69632 1 vmw_balloon
drm 360448 4 vmwgfx,ttm,drm_kms_helper
ac 16384 0
button 16384 0
ip_tables 24576 0
x_tables 36864 1 ip_tables
autofs4 40960 2
ext4 585728 1
crc16 16384 1 ext4
jbd2 106496 1 ext4
crc32c_generic 16384 0
fscrypto 28672 1 ext4
ecb 16384 0
mbcache 16384 2 ext4
hid_generic 16384 0
usbhid 53248 0
hid 122880 2 hid_generic,usbhid
sr_mod 24576 0
cdrom 61440 1 sr_mod
sd_mod 45056 3
ata_generic 16384 0
crc32c_intel 24576 2
aesni_intel 167936 1
aes_x86_64 20480 1 aesni_intel
glue_helper 16384 1 aesni_intel
lrw 16384 1 aesni_intel
gf128mul 16384 1 lrw
ablk_helper 16384 1 aesni_intel
cryptd 24576 3 ablk_helper,ghash_clmulni_intel,aesni_intel
psmouse 135168 0
xhci_pci 16384 0
xhci_hcd 188416 1 xhci_pci
usbcore 249856 3 usbhid,xhci_pci,xhci_hcd
usb_common 16384 1 usbcore
vmxnet3 57344 0
vmw_pvscsi 24576 2
ahci 36864 0
libahci 32768 1 ahci
i2c_piix4 24576 0
ata_piix 36864 0
libata 249856 4 ahci,ata_piix,libahci,ata_generic
scsi_mod 225280 5 sd_mod,libata,sr_mod,sg,vmw_pvscsi
-- /etc/initramfs-tools/modules
-- /etc/kernel-img.conf
# Kernel image management overrides
# See kernel-img.conf(5) for details
do_symlinks = yes
do_bootloader = no
do_initrd = yes
link_in_boot = no
-- /etc/initramfs-tools/initramfs.conf
MODULES=most
BUSYBOX=auto
KEYMAP=n
COMPRESS=gzip
DEVICE=
NFSROOT=auto
-- /etc/initramfs-tools/update-initramfs.conf
update_initramfs=yes
backup_initramfs=no
-- /etc/crypttab
# <target name> <source device> <key file> <options>
-- mkinitramfs hooks
/etc/initramfs-tools/hooks/:
set_hostname_in_network_config.sh
/usr/share/initramfs-tools/hooks:
cryptgnupg
cryptkeyctl
cryptopenct
cryptopensc
cryptpassdev
cryptroot
cryptroot-unlock
dmsetup
dropbear
fsck
keymap
klibc-utils
kmod
resume
thermal
udev
zz-busybox
-- System Information:
Debian Release: 9.0
APT prefers stable
APT policy: (500, 'stable')
Architecture: amd64 (x86_64)
Kernel: Linux 4.9.0-3-amd64 (SMP w/1 CPU core)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8),
LANGUAGE=en_US:en (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
Versions of packages initramfs-tools depends on:
ii initramfs-tools-core 0.130
ii linux-base 4.5
initramfs-tools recommends no packages.
Versions of packages initramfs-tools suggests:
ii bash-completion 1:2.1-4.3
-- no debconf information
# Define your network setup for the InitRAMFS via IP variable
#
# Still a kernel ip parameter will override any initramfs-tools config
# setting (see script /usr/share/initramfs-tools/init).
#
# Additional information:
# * https://www.kernel.org/doc/Documentation/filesystems/nfs/nfsroot.txt
# In Debian as kernel command via /etc/default/grub
# * The "variable" ${hostname} (case-sensitive) will be replaced on InitRAMFS
creation
# with the current host name through the hook
`set_hostname_in_network_config.sh`
# This allows the machine to be registered with its name in DNS.
IP=::::${hostname}
#!/bin/sh
#
# This InitRAMFS hook provides:
# Simple script to set IP parameter in InitRAMFS with current hostname,
# instead of manually maintaining /etc/initramfs-tools/initramfs.conf or
# a file in /etc/initramfs-tools/conf.d.
# Intended for static DHCP via host name.
#
# This will override any IP setting of /etc/initramfs-tools/initramfs.conf
# or a file in /etc/initramfs-tools/conf.d that comes before the generated
# config file.
#
# Still a kernel ip parameter will override any initramfs-tools config
# setting (see script /usr/share/initramfs-tools/init).
#
# Copyright: Matthias Bücher, see http://www.maddes.net/
# License: GNU GPL v2 or later, see http://www.gnu.org/licenses/gpl.html
#
# Additional information:
# * https://www.kernel.org/doc/Documentation/filesystems/nfs/nfsroot.txt
# In Debian as kernel command via /etc/default/grub
#
# Tested:
# * Debian 4.x
# * Debian 8.x
# * Debian 9.x
#
# History:
# v1.0 - 2017-07-01
# initial release
#
PREREQ=""
prereqs()
{
echo "${PREREQ}"
}
case "${1}" in
prereqs)
prereqs
exit 0
;;
esac
. /usr/share/initramfs-tools/hook-functions
#
# Begin real processing
#
sed -i -e "s#\${hostname}#$(hostname)#" "${DESTDIR}/conf/conf.d/network"
