300 lines
11 KiB
Bash
Executable File
300 lines
11 KiB
Bash
Executable File
#!/bin/sh
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# Vars
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## Define the hard drive to use
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if [ -b '/dev/sda' ]; then
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hdd="/dev/sda"
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else
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printf '%b\n' "Please check the hard drive to use"
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exit 0
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fi
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## Computer hostname
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new_hostname="2g"
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## Volume Group name to use for LVM
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vgname="ovhsys"
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## If the script should manage the partitions (delete, add,…)
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manage_part=0
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## Colors definition {{{
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BLACK='\033[49;30m'
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BLACKB='\033[49;90m'
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RED='\033[0;31m'
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REDB='\033[1;31m'
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GREEN='\033[0;32m'
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YELLOW='\033[0;33m'
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BLUE='\033[94;49m'
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MAGENTA='\033[0;35m'
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CYAN='\033[36;49m'
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WHITE='\033[0;37m'
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BOLD='\033[1m'
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RESET='\033[0m'
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## }}}
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## Package to exclude from debootstrap install
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dbs_pkg_exclude="vim"
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## Package to include to debootstrap install
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dbs_pkg_include="aptitude,bzip2,debconf-i18n,dialog,dmsetup,htop,isc-dhcp-client,isc-dhcp-common,locales,lvm2,openssh-server,pciutils,tmux,vim-nox,wget,zsh"
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# Prepare host system {{{
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apt update
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apt install coreutils debootstrap e2fsprogs gawk ipcalc lvm2 parted util-linux wget
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# }}}
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# Partitionning {{{
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if [ "${manage_part}" -eq 0 ]; then
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## Remove all old partitions
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for part_number in 1 2 3 4 5 6 7 8; do
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[ -b "${hdd}""${part_number}" ] && parted "${hdd}" rm "${part_number}"
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done
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## Recreate partition (/boot and LV) {{{
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### Partition type
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parted "${hdd}" mklabel msdos
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### /boot
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parted "${hdd}" mkpart primary 0% 512MB
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parted "${hdd}" set 1 boot on
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### LV
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parted "${hdd}" mkpart primary 4194kB 100%
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parted "${hdd}" set 2 lvm on
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sudo pvcreate "${hdd}"2
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sudo vgcreate "${vgname}" "${hdd}"2
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fi
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mkfs.ext3 -F -L boot -- "${hdd}"1
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## }}}
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## Create Logical Volumes {{{
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[ ! -b /dev/mapper/"${vgname}"-home ] && lvcreate -n home -L 20g "${vgname}"
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[ ! -b /dev/mapper/"${vgname}"-opt ] && lvcreate -n opt -L 2g "${vgname}"
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[ ! -b /dev/mapper/"${vgname}"-root ] && lvcreate -n root -L 5g "${vgname}"
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[ ! -b /dev/mapper/"${vgname}"-srv ] && lvcreate -n srv -L 2g "${vgname}"
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[ ! -b /dev/mapper/"${vgname}"-tmp ] && lvcreate -n tmp -L 10g "${vgname}"
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[ ! -b /dev/mapper/"${vgname}"-usr ] && lvcreate -n usr -L 15g "${vgname}"
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[ ! -b /dev/mapper/"${vgname}"-var ] && lvcreate -n var -L 10g "${vgname}"
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[ ! -b /dev/mapper/"${vgname}"-vz ] && lvcreate -n vz -L 150g "${vgname}"
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[ ! -b /dev/mapper/"${vgname}"-bkp ] && lvcreate -n bkp -L 150g "${vgname}"
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[ ! -b /dev/mapper/"${vgname}"-swap ] && lvcreate -n swap -L 2g "${vgname}"
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### Format the LV in ext4
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cd -- /dev/"${vgname}" || exit 1
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for lvname in *; do
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mkfs.ext4 -F -L "${lvname}" -- "${lvname}"
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done
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cd -- - || exit 1
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### And format the swap
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mkswap -L sw01 -- /dev/mapper/"${vgname}"-swap
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## }}}
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# }}}
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# Debootstrap {{{
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## Create and mount the system {{{
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### Root
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mkdir -p -- /target
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mountpoint -q /target || mount -- /dev/mapper/"${vgname}"-root /target
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### boot - grub
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mkdir -p -- /target/boot
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mountpoint -q /target/boot || mount -- ${hdd}1 /target/boot
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### home LV
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mkdir -p -- /target/home
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mountpoint -q /target/home || mount -- /dev/mapper/"${vgname}"-home /target/home
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### opt LV
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mkdir -p -- /target/opt
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mountpoint -q /target/opt || mount -- /dev/mapper/"${vgname}"-opt /target/opt
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### srv LV
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mkdir -p -- /target/srv
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mountpoint -q /target/srv || mount -- /dev/mapper/"${vgname}"-srv /target/srv
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#### bkp LV
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mkdir -p -- /target/srv/backup
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mountpoint -q /target/srv/backup || mount -- /dev/mapper/"${vgname}"-bkp /target/srv/backup
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### tmp LV
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mkdir -p -- /target/tmp
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mountpoint -q /target/tmp || mount -- /dev/mapper/"${vgname}"-tmp /target/tmp
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### usr LV
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mkdir -p -- /target/usr
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mountpoint -q /target/usr || mount -- /dev/mapper/"${vgname}"-usr /target/usr
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### var LV
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mkdir -p -- /target/var
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mountpoint -q /target/var || mount -- /dev/mapper/"${vgname}"-var /target/var
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#### vz LV
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mkdir -p -- /target/var/lib/vz
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mountpoint -q /target/var/lib/vz || mount -- /dev/mapper/"${vgname}"-vz /target/var/lib/vz
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### Swap
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swapon -- /dev/mapper/"${vgname}"-swap
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### System
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mkdir -p -- /target/dev
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mountpoint -q /target/dev/ || mount -t devtmpfs -- none /target/dev
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mkdir -p -- /target/dev/pts
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mountpoint -q /target/dev/pts || mount -t devpts -- /dev/pts /target/dev/pts
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mkdir -p -- /target/proc
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mountpoint -q /target/proc || mount -t proc -- none /target/proc
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mkdir -p -- /target/sys
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mountpoint -q /target/sys || mount -t sysfs -- none /target/sys
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## }}}
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## Run debootstrap
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debootstrap --arch amd64 --include="${dbs_pkg_include}" --exclude="${dbs_pkg_exclude}" stretch /target http://ftp.fr.debian.org/debian
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# }}}
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# Configure system {{{
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## Create the disk/partitions (eg. /dev/sda, /dev/sda1,…) on the target system {{{
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### Create the disk
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[ -b /target"${hdd}" ] || mknod --mode=660 /target"${hdd}" b 8 0
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### Count the number of partitions on the rescue system
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nb_part=$(ls -l -- "${hdd}"? | wc -l)
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part=1
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### Start at 1 and less/equal $nb_part
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while [ "${part}" -le "${nb_part}" ]; do
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#### Create the partitions on the target system
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[ -b /target"${hdd}${part}" ] || mknod --mode=660 /target"${hdd}${part}" b 8 "${part}"
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(( part++ ))
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done
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### Fix group of disk/partitions
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chgrp disk -- /target"${hdd}"*
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## }}}
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## Create LV inodes {{{
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### Count the number of LV on the rescue system
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nb_lv=$(ls -l -- /dev/dm-* | wc -l)
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lv=0
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### Start at 0 and less than $nb_lv cause it start at 0
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while [ "${lv}" -lt "${nb_lv}" ]; do
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#### Create the LV on the target system
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[ -b /target/dev/dm-"${lv}" ] || mknod --mode=660 /target/dev/dm-"${lv}" b 252 "${lv}"
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(( lv++ ))
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done
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### Fix group of LV
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chgrp disk -- /target/dev/dm-*
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## }}}
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## Create symlinks to LV {{{
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### Get the list of all LV
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tmp_list_lv="/tmp/lv.rescue.list"
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find /dev/"${vgname}" -maxdepth 1 -type l -printf "%f\\n" > "${tmp_list_lv}"
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### Create Volume Group and mapper directories
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mkdir -p -- /target/dev/"${vgname}"
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mkdir -p -- /target/dev/mapper
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### For each LV
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while IFS= read -r LV_NAME
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do
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#### Create symlink in Volume Group directory on the target system (eg. /dev/mapper/ovhsys/home -> ../dm-0)
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[ -L /target/dev/"${vgname}/${LV_NAME}" ] || ln -fs -- $(readlink /dev/"${vgname}/${LV_NAME}") /target/dev/"${vgname}/${LV_NAME}"
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#### Create symlink in mapper directory on the target system (eg. /dev/mapper/mapper/ovhsys-home -> ../dm-0)
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[ -L /target/dev/mapper/"${vgname}-${LV_NAME}" ] || ln -fs -- $(readlink /dev/"${vgname}/${LV_NAME}") /target/dev/mapper/"${vgname}-${LV_NAME}"
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done < "${tmp_list_lv}"
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rm -f -- "${tmp_list_lv}"
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## }}}
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## Fstab {{{
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### Use the current mtab content as default fstab file for the target system
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grep target /etc/mtab | grep -vE '(tmpfs|pts|proc|sysfs)' > /target/etc/fstab
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### Ensure to enable swap
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grep swap /target/etc/fstab || echo "/dev/mapper/${vgname}-swap swap swap sw,pri=0 0 0" >> /target/etc/fstab
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### Add extra tmpfs mount point
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grep "^proc" /target/etc/fstab || echo "proc /proc proc rw,nodev,size=100M 0 0" >> /target/etc/fstab
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grep "^sysfs" /target/etc/fstab || echo "sysfs /sys sysfs rw,nodev,size=100M 0 0" >> /target/etc/fstab
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grep "/dev/shm" /target/etc/fstab || echo "tmpfs /dev/shm tmpfs rw,nodev,size=100M 0 0" >> /target/etc/fstab
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grep "^devpts" /target/etc/fstab || echo "devpts /dev/pts devpts rw,relatime,size=10240k,nr_inodes=2051120,mode=755 0 0" >> /target/etc/fstab
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grep "/var/tmp" /target/etc/fstab || echo "/tmp /var/tmp none rw,bind,size=1M,mode=1777 0 0" >> /target/etc/fstab
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### Remove all occurrences to target and avoid double slashs
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sed -i 's;target;;g' /target/etc/fstab
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sed -i 's;//;/;g' /target/etc/fstab
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## }}}
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## Ensure to remount device {{{
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mountpoint -q /target/dev/ || mount -t devtmpfs -- none /target/dev
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mountpoint -q /target/dev/pts || mount -t devpts -- /dev/pts /target/dev/pts
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mountpoint -q /target/proc || mount -t proc -- none /target/proc
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mountpoint -q /target/sys || mount -t sysfs -- none /target/sys
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## }}}
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## Network {{{
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### Get all informations from current network configuration in rescue mode
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net_device=$(ip r | grep "^default" | head -1 | cut -d" " -f5)
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net_address=$(ip r | grep -vE "(^default|metric)" | grep "${net_device}.*src" | head -1 | awk -F" " '{print $NF}')
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read -r net_mac_address </sys/class/net/"${net_device}"/address
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net_netmask=$(ipcalc "${net_address}" | awk '/Netmask:/{print $2;}')
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net_netmask_cidr=$(ipcalc "${net_address}" | awk '/Netmask:/{print $4;}')
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net_broadcast=$(ip a s dev "${net_device}" | awk '/inet.*brd/{print $4}')
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net_network=$(ip r | grep -vE "(^default|metric)" | grep "src ${net_address}" | head -1 | cut -d"/" -f1)
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net_gateway=$(ip r | grep "^default" | head -1 | cut -d" " -f3)
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### Create a network unit for systemd-networkd
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printf '%b' "[Match]
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MACAddress=${net_mac_address}
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[Network]
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Description=network interface with default route without dhcp
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DHCP=no
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Address=${net_address}/${net_netmask_cidr}
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Gateway=${net_gateway}
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IPv6AcceptRA=no
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DNS=80.67.169.12
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" > /target/etc/systemd/network/50-default.network
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### Ensure to enable systemd-networkd at startup
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chroot /target systemctl enable systemd-networkd
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## }}}
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## Locale {{{
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### Enable locale(s)
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sed -i 's/^# \(en_US.UTF-8 UTF-8\)/\1/' /target/etc/locale.gen
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#sed -i 's/^# \(fr_FR.UTF-8 UTF-8\)/\1/' /target/etc/locale.gen
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chroot /target locale-gen
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## }}}
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## Timezone {{{
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### Set timezone
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printf '%b\n' "Europe/Paris" > /target/etc/timezone
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ln -fs /usr/share/zoneinfo/Europe/Paris /target/etc/localtime
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chroot /target dpkg-reconfigure --frontend noninteractive tzdata
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## }}}
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## Kernel and Grub {{{
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chroot /target aptitude install --assume-yes --without-recommends -- linux-image-amd64 grub-pc
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chroot /target grub-install "${hdd}"
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chroot /target update-grub
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## }}}
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## Hostname {{{
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printf '%b\n' "${new_hostname}" > /target/etc/hostname
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printf '%b\n' "127.0.0.1 ${new_hostname}" >> /target/etc/hosts
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## }}}
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# }}}
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# Finish {{{
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## Call a latecommand script {{{
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wget -O /tmp/latecommand.tar.gz "https://git.ipr.univ-rennes1.fr/cellinfo/tftpboot/raw/master/scripts/latecommand.tar.gz" --no-check-certificate
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tar xzf /tmp/latecommand.tar.gz -C /target/tmp/
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chroot /target /bin/sh /tmp/latecommand/post.stretch.sh
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## }}}
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## SSH {{{
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### Allow root connections - this should be fixed if it works
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sed -i 's/\(^\|^\#\)\(PermitRootLogin\).*/\2 yes/g' /target/etc/ssh/sshd_config
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### Add current authorized_keys from the rescue system if present
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if [ -f /root/.ssh/authorized_keys ]; then
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mkdir -p -- /target/root/.ssh
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cp -- /root/.ssh/authorized_keys /target/root/.ssh/authorized_keys
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else
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printf '%b\n' "${REDB}You might want to define an authorized key for SSH/root in /target/etc/ssh/sshd_config${RESET}"
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fi
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## }}}
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printf '%b\n' "${REDB}Please change the root's password :${RESET}"
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chroot /target passwd
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# Ensure to umount everything
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#umount /target/var/lib/vz/ /target/var/ /target/usr/ /target/tmp/ /target/sys/ /target/srv/backup/ /target/srv/ /target/proc/ /target/opt/ /target/home/ /target/dev/pts/ /target/dev /target/boot/ /target/
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printf '%b\n' "${GREEN}The system is still available on /target but you can now try to reboot the hardware.${RESET}"
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exit 0
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# }}}
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