8000 EXCLUDE_COMPONENTS in 200_partition_layout.sh by jsmeix · Pull Request #3455 · rear/rear · GitHub
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EXCLUDE_COMPONENTS in 200_partition_layout.sh #3455

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Merged
merged 6 commits into from
Apr 25, 2025
Merged

EXCLUDE_COMPONENTS in 200_partition_layout.sh #3455

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EXCLUDE_COMPONENTS in 200_partition_layout.sh
jsmeix Apr 15, 2025
02d1d73
Update 200_partition_layout.sh
jsmeix Apr 16, 2025
88d0e63
Update default.conf
jsmeix Apr 16, 2025
04a730f
Update 200_partition_layout.sh
jsmeix Apr 22, 2025
9220a4a
Update default.conf
jsmeix Apr 22, 2025
41aa905
Update default.conf
jsmeix Apr 23, 2025
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43 changes: 30 additions & 13 deletions usr/share/rear/conf/default.conf
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Original file line number Diff line number Diff line change
Expand Up @@ -3483,22 +3483,25 @@ DIRECTORY_ENTRIES_TO_RECOVER=()
####
# How to exclude something ----- EXCLUDES -------
#
# You cannot exclude a device (e.g. /dev/sdg) directly. Instead you have to exclude everything
# ON that device and then the dependency tracker will automatically exclude the device from the
# recovery (because there won't be any recovery information for that "unnecessary" device).
#
# Furthermore, you have to exclude MD devices and LVM2 volume groups separately
# Normally a whole device (e.g. a disk device /dev/sdX) is not excluded directly
# (for exceptional cases see EXCLUDE_COMPONENTS below).
# Instead specific things on a device are excluded.
# When everything on a device is excluded then via the dependency tracker
# the whole device gets automatically excluded from the recovery
# because there is no recovery information left for that device.
#
# You have to exclude MD devices and LVM2 volume groups separately
# as there is no automatic detection of these dependencies.
#
# Exclude filesystems by specifying their mountpoints. Will be automatically added to the
# $BACKUP_PROG_EXCLUDE array during backup to prevent the excluded filesystems' data to
# be backed up
# examples: /tmp
# Exclude filesystems by specifying their mountpoints.
# Will be automatically added to the $BACKUP_PROG_EXCLUDE array during backup
# to prevent the excluded filesystems' data to be backed up.
# Examples: /tmp
# /media/bigdisk
EXCLUDE_MOUNTPOINTS=()
#
# Exclude MD devices
# examples: /dev/md0
# Examples: /dev/md0
# /dev/md/0
EXCLUDE_MD=()
#
Expand All @@ -3508,13 +3511,27 @@ EXCLUDE_MD=()
# otherwise "rear recover" would try to recreate the filesystems onto non-existing LVs.
EXCLUDE_VG=()
#
# Exclude any component from the recovery image.
# EXCLUDE_COMPONENTS: Exclude any component from the recovery.
# Some component types need a prefix:
# - filesystems: "fs:/var/cache"
# - physical volumes: "pv:/dev/sda2"
# - swap: "swap:/dev/mapper/system-swap"
# Volume groups look like: "/dev/system".
# If in doubt about the correct syntax, consult /var/lib/rear/layout/disktodo.conf
# See /var/lib/rear/layout/disktodo.conf for the correct syntax of a specific component.
# Because EXCLUDE_COMPONENTS excludes any component from the recovery
# it can be used in exceptional cases to exclude unwanted whole disks.
# For example EXCLUDE_COMPONENTS+=( /dev/sdX ) excludes the disk /dev/sdX
# and via the dependency tracker usually also partitions and filesystems on it
# provided the diks behaves normally (i.e. the disk and things on it can be recognized properly).
# To exclude an unneeded problematic disk when the disk or things on it cannot be recognized properly
# EXCLUDE_COMPONENTS+=( /dev/sdX ) may work to exclude the disk with its partitions and filesystems.
# To exclude a problematic disk with higher level storage objects on it
# its matching components may have to be specified separately for example like
# EXCLUDE_COMPONENTS+=( /dev/sdX fs:/mountpoint pv:/dev/sdXN ) or similar as needed.
# Verify that all what belongs to /dev/sdX is marked as 'done' in /var/lib/rear/layout/disktodo.conf
# and that all what belongs to /dev/sdX is commented out in /var/lib/rear/layout/disklayout.conf
# to ensure there is no recovery information left as 'todo' or not commented out
# for a disk which should be excluded from the recovery.
EXCLUDE_COMPONENTS=()
#
# Only include LVM2 volume groups - the opposite of EXCLUDE_VG (handy if you only want vg00 to be included)
Expand Down Expand Up @@ -3549,7 +3566,7 @@ AUTOEXCLUDE_AUTOFS=
# Excluding files in the /tmp directory when an internal backup method is used
# is achieved via a different default setting:
# BACKUP_PROG_EXCLUDE=( '/tmp/*' ... ) above
# so that /tmp filesystem will be recreated as an empty filesystem
# so a /tmp filesystem will be recreated as an empty filesystem
# cf. https://github.com/rear/rear/pull/2261
AUTOEXCLUDE_PATH=( /media /run /mnt /tmp )
#
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30 changes: 26 additions & 4 deletions usr/share/rear/layout/save/GNU/Linux/200_partition_layout.sh
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Expand Up @@ -122,7 +122,11 @@ extract_partitions() {
# does not work with partition types that are not in the supported list
# cf. https://github.com/rear/rear/pull/2803#issuecomment-1124800884
if ! [[ "$disk_label" = "msdos" || "$disk_label" = "gpt" || "$disk_label" = "gpt_sync_mbr" || "$disk_label" = "dasd" ]] ; then
Error "Unsupported partition table '$disk_label' on $device (must be one of 'msdos' 'gpt' 'gpt_sync_mbr' 'dasd')"
if IsInArray "$device" "${EXCLUDE_COMPONENTS[@]}" ; then
DebugPrint "Unsupported partition table '$disk_label' on $device (must be one of 'msdos' 'gpt' 'gpt_sync_mbr' 'dasd')"
else
Error "Unsupported partition table '$disk_label' on $device (must be one of 'msdos' 'gpt' 'gpt_sync_mbr' 'dasd')"
fi
fi


Expand Down Expand Up @@ -357,14 +361,32 @@ extract_partitions() {
# device=/dev/mapper/mpathbp1 ; partition_prefix=mpathbp
partition_name="${device%/*}/${partition_prefix#*/}$partition_nr"
partition_device="$( get_device_name $partition_name )"
test -b "$partition_device" || Error "Invalid 'part $device' entry (partition device '$partition_device' is no block device)"
if ! test -b "$partition_device" ; then
if IsInArray "$device" "${EXCLUDE_COMPONENTS[@]}" ; then
DebugPrint "Invalid 'part $device' entry (partition device '$partition_device' is no block device)"
else
Error "Invalid 'part $device' entry (partition device '$partition_device' is no block device)"
fi
fi
# Ensure syntactically correct 'part' entries of the form
# part disk_device partition_size start_byte partition_label flags partition_device
# Each value must exist and each value must be a single non-blank word.
# When $junk contains something one of the values before was more than a single word:
test "$junk" && Error "Invalid 'part $device' entry (some value is more than a single word)"
if test "$junk" ; then
if IsInArray "$device" "${EXCLUDE_COMPONENTS[@]}" ; then
DebugPrint "Invalid 'part $device' entry (some value is more than a single word)"
else
Error "Invalid 'part $device' entry (some value is more than a single word)"
fi
fi
# When $flags is empty at least one value is missing:
test "$flags" || Error "Invalid 'part $device' entry (at least one value is missing)"
if ! test "$flags" ; then
if IsInArray "$device" "${EXCLUDE_COMPONENTS[@]}" ; then
DebugPrint "Invalid 'part $device' entry (at least one value is missing)"
else
Error "Invalid 'part $device' entry (at least one value is missing)"
fi
fi
# Some basic checks on the values happen in layout/save/default/950_verify_disklayout_file.sh
echo "part $device $size $start $type $flags $partition_device"
done < $TMP_DIR/partitions
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