Add a periodic script to backup the partition table and boot code
Optionally, alert you if the contents change from the previous backup PR: 86388 Submitted by: Rob Fairbanks <rob.fx907@gmail.com>, Miroslav Lachman <000.fbsd@quip.cz> (Original Version) MFC after: 4 weeks Relnotes: yes Sponsored by: Klara Inc. Event: July 2020 Bugathon Differential Revision: https://reviews.freebsd.org/D25628
This commit is contained in:
Allan Jude
parent
86e88c4f54
commit
ce2fe5b109
@ -252,6 +252,22 @@ Files will be deleted using the same criteria as
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would normally use when determining whether to believe the cached information,
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as configured in
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.Pa /etc/mail/sendmail.cf .
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.It Va daily_backup_efi_enable
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.Pq Vt bool
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Set to
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.Dq Li YES
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To create backup of EFI System Partion (ESP).
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.It Va daily_backup_gpart_enable
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.Pq Vt bool
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Set to
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.Dq Li YES
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To create backups of partition tables, and bootcode partition contents.
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.It Va daily_backup_gpart_verbose
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.Pq Vt bool
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Set to
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.Dq Li YES
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To be verbose if existing backups for kern.geom.conftxt or the partition tables differ
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from the new backups.
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.It Va daily_backup_passwd_enable
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.Pq Vt bool
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Set to
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124
usr.sbin/periodic/etc/daily/221.backup-gpart
Executable file
124
usr.sbin/periodic/etc/daily/221.backup-gpart
Executable file
@ -0,0 +1,124 @@
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#!/bin/sh
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## $FreeBSD$
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## Created by: Miroslav Lachman <000.fbsd@quip.cz>
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## Backup of disk partitions layout, useful for gpart restore.
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## Data are stored on local filesystem, in /var/backup.
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## It is recommended to copy those files to off-site storage.
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## If there is a global system configuration file, suck it in.
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##
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if [ -r /etc/defaults/periodic.conf ]
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then
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. /etc/defaults/periodic.conf
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source_periodic_confs
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fi
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bak_dir=/var/backups
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rotate() {
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base_name=$1
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show_diff=$2
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file="$bak_dir/$base_name"
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if [ -f "${file}.bak" ] ; then
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rc=0
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if cmp -s "${file}.bak" "${file}.tmp"; then
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rm "${file}.tmp"
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else
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rc=1
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[ -n "$show_diff" ] && diff "${file}.bak" "${file}.tmp"
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mv "${file}.bak" "${file}.bak2" || rc=3
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mv "${file}.tmp" "${file}.bak" || rc=3
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fi
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else
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rc=1
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mv "${file}.tmp" "${file}.bak" || rc=3
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[ -n "$show_diff" ] && cat "${file}.bak"
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fi
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}
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case "$daily_backup_gpart_verbose" in
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[Yy][Ee][Ss]) show="YES"
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esac
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case "$daily_backup_gpart_enable" in
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[Yy][Ee][Ss])
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echo ""
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echo "Dump of kern.geom.conftxt:";
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sysctl -n kern.geom.conftxt > "$bak_dir/kern.geom.conftxt.tmp"
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rotate "kern.geom.conftxt" $show
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gpart_devs=$(gpart show | awk '$1 == "=>" { print $4 }')
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if [ -n "$daily_backup_gpart_exclude" ]; then
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gpart_devs=$(echo ${gpart_devs} | grep -E -v "${daily_backup_gpart_exclude}")
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fi
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if [ -z "$gpart_devs" ]; then
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echo '$daily_backup_gpart_enable is set but no disk probed by kernel.' \
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"perhaps NFS diskless client."
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rc=2
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else
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echo ""
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echo "Backup of partitions information for:";
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for d in ${gpart_devs}; do
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echo "$d"
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safe_name=$(echo "gpart.${d}" | tr -cs ".[:alnum:]\n" "_")
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gpart backup "$d" > "$bak_dir/$safe_name.tmp"
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rotate "$safe_name" $show
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done
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gpart_show=$(gpart show -p)
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boot_part=$(echo "$gpart_show" | awk '$4 ~ /(bios|freebsd)-boot/ { print $3 }')
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if [ -n "$boot_part" ]; then
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echo ""
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echo "Backup of boot partition content:"
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for b in ${boot_part}; do
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echo "$b"
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safe_name=$(echo "boot.${b}" | tr -cs ".[:alnum:]\n" "_")
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dd if="/dev/${b}" of="$bak_dir/$safe_name.tmp" 2> /dev/null
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rotate "$safe_name"
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done
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fi
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mbr_part=$(echo "$gpart_show" | awk '$1 == "=>" && $5 == "MBR" { print $4 }')
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if [ -n "$mbr_part" ]; then
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echo ""
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echo "Backup of MBR record:"
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for mb in ${mbr_part}; do
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echo "$mb"
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safe_name=$(echo "boot.${mb}" | tr -cs ".[:alnum:]\n" "_")
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dd if="/dev/${mb}" of="$bak_dir/$safe_name.tmp" bs=512 count=1 2> /dev/null
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rotate "$safe_name"
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done
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fi
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fi
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;;
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*) rc=0
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;;
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esac
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case "$daily_backup_efi_enable" in
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[Yy][Ee][Ss])
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efi_part=$(gpart show -p | awk '$4 ~ /efi/ {print $3}')
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if [ -n "$efi_part" ]; then
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echo ""
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echo "Backup of EFI partition content:"
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for efi in ${efi_part}; do
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echo "$efi"
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safe_name=$(echo "efi.${efi}" | tr -cs ".[:alnum:]\n" "_")
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dd if="/dev/${efi}" of="$bak_dir/$safe_name.tmp" 2> /dev/null
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rotate "$safe_name"
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done
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fi
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;;
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esac
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exit $rc
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@ -77,6 +77,11 @@ daily_backup_passwd_enable="YES" # Backup passwd & group
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# 210.backup-aliases
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daily_backup_aliases_enable="YES" # Backup mail aliases
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# 221.backup-gpart
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daily_backup_gpart_enable="YES" # Backup partition table/boot partition/MBR
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daily_backup_gpart_verbose="NO" # Be verbose if new backup differs from the new one
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daily_backup_efi_enable="NO" # Backup EFI system partition (ESP)
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# 300.calendar
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daily_calendar_enable="NO" # Run calendar -a
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