rzerres/dsnap-sync
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snap-sync: restructure function block

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- new function get_disk_info()
- new function run_config()
- new function run_backup()
- new function get_target_disk()
- apply them to be in lexical order

Signed-off-by: Ralf Zerres <ralf.zerres@networkx.de>
This commit is contained in:
Ralf Zerres
2017-11-08 17:16:30 +01:00
parent 15a0aee30e
commit 2ed161c8db
1 changed files with 272 additions and 252 deletions
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338
bin/snap-sync
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@@ -70,6 +70,38 @@ error() {
notify_error 'Error' 'Check journal for more information.'
} >&2
get_disk_infos () {
if [[ "$(findmnt -n -v --target / -o FSTYPE)" == "btrfs" ]]; then
EXCLUDE_UUID=$(findmnt -n -v -t btrfs --target / -o UUID)
TARGETS=$($ssh findmnt -n -v -t btrfs -o UUID,TARGET --list | grep -v $EXCLUDE_UUID | awk '{print $2}')
UUIDS=$($ssh findmnt -n -v -t btrfs -o UUID,TARGET --list | grep -v $EXCLUDE_UUID | awk '{print $1}')
else
TARGETS=$($ssh findmnt -n -v -t btrfs -o TARGET --list)
UUIDS=$($ssh findmnt -n -v -t btrfs -o UUID --list)
fi
declare -a TARGETS_ARRAY
declare -a UUIDS_ARRAY
i=0
disk=-1
disk_count=0
for x in $UUIDS; do
UUIDS_ARRAY[$i]=$x
if [[ "$x" == "$uuid_cmdline" ]]; then
disk=$i
disk_count=$(($disk_count+1))
fi
i=$((i+1))
done
i=0
for x in $TARGETS; do
TARGETS_ARRAY[$i]=$x
i=$((i+1))
done
}
notify() {
for u in $(users | sed 's/ /\n/' | sort -u); do
sudo -u $u DISPLAY=:0 \
@@ -169,158 +201,22 @@ parse_params () {
fi
}
traperror() {
printf "Exited due to error on line %s.\n" $1
printf "exit status: %s\n" "$2"
printf "command: %s\n" "$3"
printf "bash line: %s\n" "$4"
printf "function progname: %s\n" "$5"
exit 1
}
run_config () {
declare -a BACKUPDIRS_ARRAY
declare -a MYBACKUPDIR_ARRAY
declare -a OLD_NUM_ARRAY
declare -a OLD_SNAP_ARRAY
declare -a NEW_NUM_ARRAY
declare -a NEW_SNAP_ARRAY
declare -a NEW_INFO_ARRAY
declare -a BACKUPLOC_ARRAY
declare -a CONT_BACKUP_ARRAY
trapkill() {
die "Exited due to user intervention."
}
printf "\nInitial configuration...\n" | tee $PIPE
usage() {
cat <<EOF
$progname $version
Usage: $progname [options]
Options:
-d, --description <desc> Change the snapper description. Default: "latest incremental backup"
-c, --config <config> Specify the snapper configuration to use. Otherwise will perform for each snapper
configuration. Can list multiple configurations within quotes, space-separated
(e.g. -c "root home").
-n, --noconfirm Do not ask for confirmation for each configuration. Will still prompt for backup
directory name on first backup"
-u, --UUID <UUID> Specify the UUID of the mounted BTRFS subvolume to back up to. Otherwise will prompt."
If multiple mount points are found with the same UUID, will prompt user."
--remote <address> Send the snapshot backup to a remote machine. The snapshot will be sent via ssh. You
should specify the remote machine's hostname or ip address. The 'root' user must be
permitted to login on the remote machine.
-v, --verbose Be more verbose on what's going on.
EOF
}
###
# Main
###
trap 'traperror ${LINENO} $? "$BASH_COMMAND" $BASH_LINENO "${FUNCPROGNAME[@]}"' ERR
trap trapkill SIGTERM SIGINT
cwd=`pwd`
ssh=""
parse_params $@
check_prerequisites
if [[ "$uuid_cmdline" != "none" ]]; then
if [[ -z $ssh ]]; then
notify_info "Backup started" "Starting backups to $uuid_cmdline..."
else
notify_info "Backup started" "Starting backups to $uuid_cmdline at $remote..."
fi
else
if [[ -z $ssh ]]; then
notify_info "Backup started" "Starting backups. Use command line menu to select disk."
else
notify_info "Backup started" "Starting backups. Use command line menu to select disk on $remote."
fi
fi
if [[ "$(findmnt -n -v --target / -o FSTYPE)" == "btrfs" ]]; then
EXCLUDE_UUID=$(findmnt -n -v -t btrfs --target / -o UUID)
TARGETS=$($ssh findmnt -n -v -t btrfs -o UUID,TARGET --list | grep -v $EXCLUDE_UUID | awk '{print $2}')
UUIDS=$($ssh findmnt -n -v -t btrfs -o UUID,TARGET --list | grep -v $EXCLUDE_UUID | awk '{print $1}')
else
TARGETS=$($ssh findmnt -n -v -t btrfs -o TARGET --list)
UUIDS=$($ssh findmnt -n -v -t btrfs -o UUID --list)
fi
declare -a TARGETS_ARRAY
declare -a UUIDS_ARRAY
i=0
disk=-1
disk_count=0
for x in $UUIDS; do
UUIDS_ARRAY[$i]=$x
if [[ "$x" == "$uuid_cmdline" ]]; then
disk=$i
disk_count=$(($disk_count+1))
fi
i=$((i+1))
done
i=0
for x in $TARGETS; do
TARGETS_ARRAY[$i]=$x
i=$((i+1))
done
if [[ "${#UUIDS_ARRAY[$@]}" -eq 0 ]]; then
die "No external btrfs subvolumes found to backup to."
fi
if [[ "$disk_count" > 1 ]]; then
printf "Multiple mount points were found with UUID %s.\n" "$uuid_cmdline"
disk="-1"
fi
if [[ "$disk" == -1 ]]; then
if [[ "$disk_count" == 0 && "$uuid_cmdline" != "none" ]]; then
error "A device with UUID $uuid_cmdline was not found to be mounted, or it is not a BTRFS device."
fi
if [[ -z $ssh ]]; then
printf "Select a mounted BTRFS device on your local machine to backup to.\n"
else
printf "Select a mounted BTRFS device on %s to backup to.\n" "$remote"
fi
while [[ $disk -lt 0 || $disk -gt $i ]]; do
for x in "${!TARGETS_ARRAY[@]}"; do
printf "%4s) %s (%s)\n" "$((x+1))" "${UUIDS_ARRAY[$x]}" "${TARGETS_ARRAY[$x]}"
done
printf "%4s) Exit\n" "0"
read -r -p "Enter a number: " disk
if ! [[ $disk == ?(-)+([0-9]) ]]; then
printf "\nNo disk selected. Select a disk to continue.\n"
disk=-1
fi
done
if [[ $disk == 0 ]]; then
exit 0
fi
disk=$(($disk-1))
fi
selected_uuid="${UUIDS_ARRAY[$((disk))]}"
selected_mnt="${TARGETS_ARRAY[$((disk))]}"
printf "\nYou selected the disk with UUID %s.\n" "$selected_uuid" | tee $PIPE
if [[ -z $ssh ]]; then
printf "The disk is mounted at %s.\n" "$selected_mnt" | tee $PIPE
else
printf "The disk is mounted at %s:%s.\n" "$remote" "$selected_mnt" | tee $PIPE
fi
declare -a BACKUPDIRS_ARRAY
declare -a MYBACKUPDIR_ARRAY
declare -a OLD_NUM_ARRAY
declare -a OLD_SNAP_ARRAY
declare -a NEW_NUM_ARRAY
declare -a NEW_SNAP_ARRAY
declare -a NEW_INFO_ARRAY
declare -a BACKUPLOC_ARRAY
declare -a CONT_BACKUP_ARRAY
printf "\nInitial configuration...\n" | tee $PIPE
# Initial configuration of where backup directories are
i=0
for x in $selected_configs; do
# Initial configuration of where backup directories are
i=0
for x in $selected_configs; do
if [[ "$(snapper -c $x list -t single | awk '/'"$selected_uuid"'/ {cnt++} END {print cnt}')" -gt 1 ]]; then
error "More than one snapper entry found with UUID $selected_uuid for configuration $x. Skipping configuration $x."
@@ -367,7 +263,7 @@ for x in $selected_configs; do
if [[ -z "$old_num" ]]; then
printf "No backups have been performed for '%s' on this disk.\n" "$x"
read -r -p "Enter name of directory to store backups, relative to $selected_mnt (to be created if not existing): " mybackupdir
read -r -p "Enter progname of directory to store backups, relative to $selected_mnt (to be created if not existing): " mybackupdir
printf "This will be the initial backup for snapper configuration '%s' to this disk. This could take awhile.\n" "$x"
BACKUPDIR="$selected_mnt/$mybackupdir"
$ssh mkdir -p -m700 "$BACKUPDIR"
@@ -421,12 +317,14 @@ for x in $selected_configs; do
i=$(($i+1))
done
done
}
# Actual backing up
printf "\nPerforming backups...\n" | tee $PIPE
i=-1
for x in $selected_configs; do
run_backup () {
# Actual backing up
printf "\nPerforming backups...\n" | tee $PIPE
i=-1
for x in $selected_configs; do
i=$(($i+1))
@@ -492,10 +390,132 @@ for x in $selected_configs; do
printf "Backup complete for configuration %s.\n" "$x" > $PIPE
done
done
printf "\nDone!\n" | tee $PIPE
exec 3>&-
printf "\nDone!\n" | tee $PIPE
exec 3>&-
}
select_target_disk () {
if [[ "${#UUIDS_ARRAY[$@]}" -eq 0 ]]; then
die "No external btrfs subvolumes found to backup to."
fi
if [[ "$disk_count" > 1 ]]; then
printf "Multiple mount points were found with UUID %s.\n" "$uuid_cmdline"
disk="-1"
fi
if [[ "$disk" == -1 ]]; then
if [[ "$disk_count" == 0 && "$uuid_cmdline" != "none" ]]; then
error "A device with UUID $uuid_cmdline was not found to be mounted, or it is not a BTRFS device."
fi
if [[ -z $ssh ]]; then
printf "Select a mounted BTRFS device on your local machine to backup to.\n"
else
printf "Select a mounted BTRFS device on %s to backup to.\n" "$remote"
fi
while [[ $disk -lt 0 || $disk -gt $i ]]; do
for x in "${!TARGETS_ARRAY[@]}"; do
printf "%4s) %s (%s)\n" "$((x+1))" "${UUIDS_ARRAY[$x]}" "${TARGETS_ARRAY[$x]}"
done
printf "%4s) Exit\n" "0"
read -r -p "Enter a number: " disk
if ! [[ $disk == ?(-)+([0-9]) ]]; then
printf "\nNo disk selected. Select a disk to continue.\n"
disk=-1
fi
done
if [[ $disk == 0 ]]; then
exit 0
fi
disk=$(($disk-1))
fi
}
traperror() {
printf "Exited due to error on line %s.\n" $1
printf "exit status: %s\n" "$2"
printf "command: %s\n" "$3"
printf "bash line: %s\n" "$4"
printf "function progname: %s\n" "$5"
exit 1
}
trapkill() {
die "Exited due to user intervention."
}
usage() {
cat <<EOF
$progname $version
Usage: $progname [options]
Options:
-d, --description <desc> Change the snapper description. Default: "latest incremental backup"
-c, --config <config> Specify the snapper configuration to use. Otherwise will perform for each snapper
configuration. Can list multiple configurations within quotes, space-separated
(e.g. -c "root home").
-n, --noconfirm Do not ask for confirmation for each configuration. Will still prompt for backup
directory name on first backup"
-u, --UUID <UUID> Specify the UUID of the mounted BTRFS subvolume to back up to. Otherwise will prompt."
If multiple mount points are found with the same UUID, will prompt user."
--remote <address> Send the snapshot backup to a remote machine. The snapshot will be sent via ssh. You
should specify the remote machine's hostname or ip address. The 'root' user must be
permitted to login on the remote machine.
-v, --verbose Be more verbose on what's going on.
EOF
}
###
# Main
###
trap 'traperror ${LINENO} $? "$BASH_COMMAND" $BASH_LINENO "${FUNCPROGNAME[@]}"' ERR
trap trapkill SIGTERM SIGINT
cwd=`pwd`
ssh=""
parse_params $@
check_prerequisites
if [[ "$uuid_cmdline" != "none" ]]; then
if [[ -z $ssh ]]; then
notify_info "Backup started" "Starting backups to $uuid_cmdline..."
else
notify_info "Backup started" "Starting backups to $uuid_cmdline at $remote..."
fi
else
if [[ -z $ssh ]]; then
notify_info "Backup started" "Starting backups. Use command line menu to select disk."
else
notify_info "Backup started" "Starting backups. Use command line menu to select disk on $remote."
fi
fi
# read mounted BTRFS structures
get_disk_infos
# select the target BTRFS subvol
select_target_disk
selected_uuid="${UUIDS_ARRAY[$((disk))]}"
selected_mnt="${TARGETS_ARRAY[$((disk))]}"
printf "\nYou selected the disk with UUID %s.\n" "$selected_uuid" | tee $PIPE
if [[ -z $ssh ]]; then
printf "The disk is mounted at %s.\n" "$selected_mnt" | tee $PIPE
else
printf "The disk is mounted at %s:%s.\n" "$remote" "$selected_mnt" | tee $PIPE
fi
# create and initialize structures for snapper configs
run_config
# run backups using btrfs-send -> btrfs-receive
run_backup
if [[ "$uuid_cmdline" != "none" ]]; then
notify_info "Finished" "Backups to $uuid_cmdline complete!"