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dsnap-sync: improve handling of btrfs-archive

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* handle mounting of correct volume-name
* get_archive_last_sync_id(): find corresponding synced id
* get_snapper_last_sync_id(): optional search for matching tapeid
* run_config_preparation(): harden init of snapper_target_sync_id
* run_backup():
  - correct itaration in multi config szenario
  - adopt verbosity messages
  - extend logic to eleminate sending of unnecessary streams
  - correct handling of remote transfer of archive streams
* code cleanup

Signed-off-by: Ralf Zerres <ralf.zerres@networkx.de>
This commit is contained in:
Ralf Zerres
2018-09-22 21:15:38 +02:00
parent d4f725d0c9
commit 7c82f85585
1 changed files with 103 additions and 40 deletions
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143
bin/dsnap-sync
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@@ -83,6 +83,7 @@ snapper_backup_type='none'
snapper_config_postfix=
snap_cleanup_algorithm="timeline"
verbose=0
volume_name=
# ascii color
BLUE=
@@ -146,7 +147,8 @@ check_snapper_failed_ids () {
if [ "$batch" ]; then
answer="yes"
else
printf "${MAGENTA}Found %s previous failed sync runs for '%s'${NO_COLOR}\n" "${snapper_failed_ids}" "$selected_config"
printf "${MAGENTA}Found %s previous failed sync runs for '%s'${NO_COLOR}\n" \
"${snapper_failed_ids}" "$selected_config"
answer=no
get_answer_yes_no "Delete failed backup snapshots [y/N]? " "$answer"
fi
@@ -273,20 +275,42 @@ get_archive_last_sync_id () {
# target is LTFS tape
if [ ${#volume_name} -gt 1 ]; then
case ${archive_type} in
incremental)
cmd="find ${selected_target}/${backupdir}/${snapper_target_config} -name *_${archive_type}.btrfs \
| awk -F '.*/' '{ gsub(/_${archive_type}.btrfs\$/,"_"); print \$2}' "
;;
#incremental)
# cmd="find ${selected_target}/${backupdir}/${snapper_target_config} -name *_${archive_type}.btrfs \
# | awk -F '.*/' '{ gsub(/_${archive_type}.btrfs\$/,"_"); print \$2}' \
# | awk ' \$1 == $snapper_source_sync_id {print \$1} ' "
# ;;
*)
cmd="find ${selected_target}/${backupdir}/${snapper_target_config} -name *_${archive_type}.btrfs \
| awk -F '.*/' '{ gsub(/_${archive_type}.btrfs\$/,"_"); print \$2}' "
cmd="find ${selected_target}/${backupdir}/${snapper_target_config} -name *_${archive_type}.btrfs \
| awk -F '.*/' '{ gsub(/_${archive_type}.btrfs\$/,"_"); cnt++} END {print cnt}'"
ret=$(eval $run_ssh "$cmd" 2>/dev/null)
if [ ${#ret} -ge 1 ]; then
if [ $verbose -ge 3 ]; then
printf "${MAGENTA}Found ${GREEN}'%s'${MAGENTA} previous synced archives for config ${GREEN}'%s'${NO_COLOR}\n" \
"${ret}" "$selected_config"
fi
# get last sync-id
cmd="find ${selected_target}/${backupdir}/${snapper_target_config} -name *_${archive_type}.btrfs \
| awk -F '.*/' '{ gsub(/_${archive_type}.btrfs\$/,"_") } END {print \$2}'"
else
return 1
fi
;;
esac
fi
ret=$(eval $run_ssh "$cmd" 2>/dev/null)
if [ ${#ret} -ge 1 ]; then
# ok, matching snapshot found
snapper_sync_id=$ret
if [ $verbose -ge 3 ]; then
printf "Got archive snapshot: ${GREEN}'%s'${NO_COLOR} (id: ${GREEN}'%s'${NO_COLOR})\n" \
$snapper_target_config $snapper_sync_id
fi
return 0
else
# no snapshot found
return 1
fi
}
@@ -689,7 +713,8 @@ get_snapper_last_sync_id () {
local snapper_description=${2##snapper_description=}
local snapper_uuid=${3##snapper_uuid=}
local snapper_subvolid=${4##snapper_subvolid=}
local remote=${5##remote=}
local snapper_tapeid=${5##snapper_tapeid=}
local remote=${6##remote=}
local run_ssh=''
snapper_sync_id=0
@@ -697,6 +722,8 @@ get_snapper_last_sync_id () {
if [ $verbose -ge 3 ]; then
printf "${MAGENTA}get_snapper_last_sync_id()...${NO_COLOR}\n"
#printf "${MAGENTA}snapper_description: ${GREEN}'%s'${NO_COLOR}\n" \
# "${snapper_description}"
fi
# only process, if config does exist
@@ -726,7 +753,13 @@ get_snapper_last_sync_id () {
if [ ${#snapper_subvolid} -ge 1 -a ${#snapper_uuid} -ge 1 ]; then
cmd="snapper --config $snapper_config list --type single \
| awk '/$snapper_description/' \
| awk '/subvolid=$snapper_subvolid, uuid=$snapper_uuid/' \
| awk '/subvolid="$snapper_subvolid", uuid="$snapper_uuid"/' \
| awk 'END {print \$1}'"
elif [ ${#snapper_tapeid} -ge 1 ]; then
# | awk '/"$snapper_description"' '/"$snap_description_finished/"' \
cmd="snapper --config $snapper_config list --type single \
| awk '/$snapper_description/' \
| awk '/tapeid="$snapper_tapeid"/' \
| awk 'END {print \$1}'"
else
cmd="snapper --config $snapper_config list --type single \
@@ -743,8 +776,13 @@ get_snapper_last_sync_id () {
if [ ${#snapper_subvolid} -ge 1 -a ${#snapper_uuid} -ge 1 ]; then
cmd="snapper --config $snapper_config list --type single \
| awk '/$snap_description_finished/' \
| awk '/subvolid=$selected_subvol, uuid=$selected_uuid/' \
| awk '/subvolid="$selected_subvol", uuid="$selected_uuid"/' \
| awk 'END {print \$1}'"
elif [ ${#snapper_tapeid} -ge 1 ]; then
cmd="snapper --config $snapper_config list --type single \
| awk '/$snap_description_finished/' \
| awk '/tapeid="$snapper_tapeid"/' \
| awk 'END {print \$1}'"
else
cmd="snapper --config $snapper_config list --type single \
| awk '/$snap_description_finished/' \
@@ -1207,15 +1245,16 @@ run_config_preparation () {
case $snapper_backup_type in
btrfs-snapshot)
get_snapper_last_sync_id "snapper_config=${selected_config}" "snapper_description=${snap_description_synced}" \
"snapper_uuid=" "snapper_subvolid=" "remote="
"snapper_uuid=" "snapper_subvolid=" "snapper_tapeid=" "remote="
;;
btrfs-clone)
get_snapper_last_sync_id "snapper_config=${selected_config}" "snapper_description=${snap_description_synced}" \
"snapper_uuid=" "snapper_subvolid=" "remote="
"snapper_uuid=" "snapper_subvolid=" "snapper_tapeid=" "remote="
;;
btrfs-archive)
get_snapper_last_sync_id "snapper_config=${selected_config}" "snapper_description=${snap_description_synced}" \
"snapper_uuid=" "snapper_subvolid=" "remote="
"snapper_uuid=" "snapper_subvolid=" "snapper_tapeid=" "remote="
#"snapper_uuid=" "snapper_subvolid=" "snapper_tapeid=${volume_name}" "remote="
;;
*)
if [ $verbose -ge 3 ]; then
@@ -1255,20 +1294,22 @@ run_config_preparation () {
get_archive_last_sync_id "snapper_config=${snapper_target_config}" \
"archive_type=full" \
"remote=${remote}"
snapper_target_sync_id=$snapper_sync_id
;;
*)
get_snapper_last_sync_id "snapper_config=${snapper_target_config}" \
"snapper_description=${snap_description_synced}" \
"snapper_uuid=" "snapper_subvolid=" "remote=${remote}"
snapper_target_sync_id=$snapper_sync_id
"snapper_uuid=" "snapper_subvolid=" "snapper_tapeid=" "remote=${remote}"
;;
esac
if [ $? -eq 0 ]; then
snapper_target_sync_id=$snapper_sync_id
else
snapper_target_sync_id=0
fi
# check for corresponding source and target sync id's
snapper_common_sync_id=0
if [ $snapper_target_sync_id -ne $snapper_source_sync_id ]; then
# select commen sync id
get_snapper_sync_id "snapper_config=${selected_config}" "remote="
if [ $? -eq 0 ]; then
@@ -1285,7 +1326,7 @@ run_config_preparation () {
fi
fi
else
#printf "no commen sync id found.\n"
# no commen sync id found
snapper_target_sync_id=0
fi
fi
@@ -1394,6 +1435,7 @@ run_backup () {
if [ $donotify -gt 0 ]; then
notify_info "Backup in progress" "NOTE: Skipping '$selected_config' configuration."
fi
i=$(($i+1))
continue
fi
@@ -1584,34 +1626,50 @@ run_backup () {
fi
else
# source holds synced snapshots
if [ $verbose -ge 2 ]; then
printf "${MAGENTA}Sending ${GREEN}incremental snapshot${NO_COLOR} (id: ${GREEN}'%s'${NO_COLOR}) for snapper config ${GREEN}'%s'${NO_COLOR} ...\n" \
"$snapper_target_id" "$selected_config"
fi
if [ $verbose -ge 3 ]; then
printf "Last synced ${GREEN}source${NO_COLOR} snapshot id: ${GREEN}'%s'${NO_COLOR} (path: ${GREEN}'%s'${NO_COLOR})\n" \
"$snapper_source_sync_id" "$snapper_source_sync_snapshot"
printf "New ${GREEN}source${NO_COLOR} snapshot id: ${GREEN}'%s'${NO_COLOR} (path: ${GREEN}'%s'${NO_COLOR})\n" \
"$snapper_source_id" "$snapper_source_snapshot"
printf "Last synced ${GREEN}target${NO_COLOR} snapshot id: ${GREEN}'%s'${NO_COLOR} (path: ${GREEN}'%s'${NO_COLOR})\n" \
"$snapper_target_sync_id" "$snapper_target_sync_snapshot"
printf "New ${GREEN}target${NO_COLOR} snapshot id: ${GREEN}'%s'${NO_COLOR} (path: ${GREEN}'%s'${NO_COLOR})\n" \
"$snapper_target_id" "$snapper_target_snapshot/snapshot"
printf "Common synced snapshot id: ${GREEN}'%s'${NO_COLOR}\n" \
"$snapper_common_sync_id"
printf "Last synced ${GREEN}source${NO_COLOR} snapshot id: ${GREEN}'%s'${NO_COLOR} (path: ${GREEN}'%s'${NO_COLOR})\n" \
"$snapper_source_sync_id" "$snapper_source_sync_snapshot"
printf "Last synced ${GREEN}target${NO_COLOR} snapshot id: ${GREEN}'%s'${NO_COLOR} (path: ${GREEN}'%s'${NO_COLOR})\n" \
"$snapper_target_sync_id" "$snapper_target_sync_snapshot"
fi
if [ $verbose -ge 2 ]; then
printf "${MAGENTA}Prepare ${GREEN}incremental snapshot${NO_COLOR} (id: ${GREEN}'%s'${NO_COLOR}) for snapper config ${GREEN}'%s'${NO_COLOR} ...\n" \
"$snapper_target_id" "$selected_config"
fi
# verify that we have a matching source and target snapshot-id
if [ $snapper_common_sync_id -eq 0 ]; then
if [ ${snapper_source_sync_id} != ${snapper_target_sync_id} ]; then
if [ ${snapper_source_id} -eq ${snapper_target_sync_id} ]; then
# nothing to do, snapshot already in sync
if [ $verbose -ge 3 ]; then
printf "${MAGENTA}Nothing to do! Source and target snapshot (id: ${GREEN}'%s'${MAGENTA}) are in sync.${NO_COLOR}\n" \
"$snapper_target_sync_id"
fi
# go for next configuration
i=$(($i+1))
continue
elif [ ${snapper_source_sync_id} != ${snapper_target_sync_id} ]; then
if [ $snapper_target_sync_id -lt $snapper_target_id ]; then
# try to find last target_sync_id in source_config
get_snapper_sync_id "snapper_config=${snapper_source_config}" "remote="
if [ $? -eq 0 ]; then
snapper_source_sync_id=$snapper_sync_id
snapper_source_sync_snapshot=$SUBVOLUME/.snapshots/$snapper_sync_id/snapshot
else
printf "no commen sync id.\n"
printf "${RED}Error: ${MAGENTA}No common sync id found. Aborting backup for config ${GREEN}'%s'${NOCOLOR}\n"
# go for next configuration
i=$(($i+1))
continue
fi
fi
elif [ ${snapper_source_id} != ${snapper_source_sync_id} ]; then
snapper_common_sync_id=$snapper_source_sync_id
snapper_common_sync_snapshot=$snapper_source_sync_snapshot
else
# use source_id as common sync-id
snapper_common_sync_id=$snapper_source_id
@@ -1620,7 +1678,7 @@ run_backup () {
else
# we have a common sync_id
if [ ${snapper_source_sync_id} != ${snapper_target_sync_id} ]; then
# btrfs send: we need to use the common sync_id as a valid parent
# btrfs send: use common sync_id as a valid parent
snapper_source_sync_id=$snapper_common_sync_id
snapper_source_sync_snapshot=$SUBVOLUME/.snapshots/$snapper_source_sync_id/snapshot
fi
@@ -1643,19 +1701,27 @@ run_backup () {
*)
# Can't use btrfs receive, since target filesystem can't support btrfs snapshot feature
snapper_target_stream=${snapper_target_id}_incremental.btrfs
cmd="btrfs send $btrfs_verbose_flag -p $snapper_common_sync_snapshot $snapper_source_snapshot 2>$BTRFS_PIPE \
| $cmd_pv \
$cmd_ionice $ssh cat >$snapper_target_snapshot/$snapper_target_stream 2>$BTRFS_PIPE"
if [ -z $remote ]; then
cmd="btrfs send $btrfs_verbose_flag -p $snapper_common_sync_snapshot $snapper_source_snapshot 2>$BTRFS_PIPE \
| $cmd_pv \
$cmd_ionice cat > $snapper_target_snapshot/$snapper_target_stream 2>$BTRFS_PIPE"
else
cmd="btrfs send $btrfs_verbose_flag -p $snapper_common_sync_snapshot $snapper_source_snapshot 2>$BTRFS_PIPE \
| $cmd_pv \
$cmd_ionice $ssh 'cat > $snapper_target_snapshot/$snapper_target_stream' 2>$BTRFS_PIPE"
fi
;;
esac
if [ $verbose -ge 2 ]; then
printf "${GREEN}btrfs send${NO_COLOR} is using \n parent snapshot id: ${GREEN}'%s'${NO_COLOR} (path: ${GREEN}'%s'${NO_COLOR}) and\n snapshot id: ${GREEN}'%s'${NO_COLOR} (path: ${GREEN}'%s'${NO_COLOR})\n constructing incremental data-stream ...\n" \
"$snapper_common_sync_id" "$snapper_common_sync_snapshot" "$snapper_source_id" "$snapper_source_snapshot"
printf "%b" "${GREEN}btrfs send${NO_COLOR} is using\n" \
" parent snapshot id: ${GREEN}'$snapper_common_sync_id'${NO_COLOR} (path: ${GREEN}'$snapper_common_sync_snapshot'${NO_COLOR}) and\n" \
" snapshot id: ${GREEN}'$snapper_source_id'${NO_COLOR} (path: ${GREEN}'$snapper_source_snapshot'${NO_COLOR})\n" \
" to construct an incremental data-stream ...\n"
fi
if [ $verbose -ge 3 ]; then
printf "${GREEN}btrfs command:${NO_COLOR} '%s'\n" "$cmd"
fi
eval $cmd 1>/dev/null
$(eval $cmd) 1>/dev/null
if [ "$?" -gt 0 ]; then
printf "${RED}BTRFS_PIPE: %s${NO_COLOR}\n" "$(cat $BTRFS_PIPE)"
die "btrfs pipe error."
@@ -1821,8 +1887,8 @@ run_finalize () {
# save target-id
if [ $snapper_source_id -gt 0 ]; then
cmd="snapper --config $selected_config modify \
--userdata \"tapeid=$volume_name\" \
$snapper_source_id"
--userdata \"tapeid=$volume_name\" \
$snapper_source_id"
if [ $verbose -ge 3 ]; then
printf "${MAGENTA}Tagging snapper metadata${NO_COLOR} for snapper id ${GREEN}'%s'${NO_COLOR} on source for configuration ${GREEN}'%s'${NO_COLOR} ...\n" \
@@ -2084,8 +2150,6 @@ select_target () {
"$selected_fstype" "$selected_uuid" "$selected_subvol"
;;
ltfs)
volume_name=$(attr -g ltfs.volumeName ${selected_target})
volume_name=$(echo ${volume_name##*:} | sed -e 's/\r\n//g')
printf "${MAGENTA}You selected %s target (VolumeName=${GREEN}'%s'${MAGENTA})${NO_COLOR}.\n" \
"$selected_fstype" "$volume_name"
;;
@@ -2520,7 +2584,6 @@ verify_archive_structure () {
printf "${MAGENTA}Create${NO_COLOR} path ${GREEN}'%s'${NO_COLOR} to store target snapshot.\n" \
"$backup_root/$snapper_id"
fi
ret=$(eval $ssh mkdir --mode=0700 \
$backup_root/$snapper_id)
if [ $? -ne 0 ]; then