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Fix script for the case when ssh sometimes dies

master
Vitaliy Filippov 2020-08-21 23:30:59 +03:00
parent 6e0db3def1
commit 91c5efcbe7
1 changed files with 10 additions and 4 deletions
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14
backup.sh
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@ -1,6 +1,8 @@
#!/bin/bash
# Example incremental backup script
set -e
HOST=your-host.ru
ERA_DEVICE=md1p3_era
METADATA_DEVICE=/dev/md1p4
@ -20,14 +22,14 @@ for i in {1..5}; do
dmsetup message $ERA_DEVICE 0 take_metadata_snap >/dev/null && \
(era_invalidate --metadata-snapshot --written-since $ERA $METADATA_DEVICE | era_copy $GRANULARITY | perl -pe 's/\s+.*//')"`
if [ $SIZE -le 0 ]; then
if [ "$SIZE" -le 0 ]; then
echo "Failed to estimate delta size"
exit 1
fi
echo "Estimated delta size $((SIZE/1048576)) MB"
if [ $SIZE -le $FREEZE_LIMIT ]; then
if [ "$SIZE" -le $FREEZE_LIMIT ]; then
echo "Performing final copy with fsfreeze"
@ -38,7 +40,10 @@ for i in {1..5}; do
(era_invalidate --metadata-snapshot --written-since $ERA $METADATA_DEVICE | era_copy --progress $GRANULARITY /dev/mapper/$ERA_DEVICE | gzip); \
fsfreeze --unfreeze $MOUNTPOINT >/dev/null" | \
gzip -d | era_apply $DIR/$FILE) && \
(ssh root@$HOST "dmsetup status $ERA_DEVICE | perl -e 'print [split /\s+/, <>]->[5]'" > $DIR/era) || exit 1
(ssh root@$HOST "dmsetup status $ERA_DEVICE | perl -e 'print [split /\s+/, <>]->[5]'" > $DIR/era_new) || exit 1
mv $DIR/era_new $DIR/era
echo "Copied up to era "`cat $DIR/era`
exit 0
@ -50,7 +55,8 @@ for i in {1..5}; do
dmsetup message $ERA_DEVICE 0 take_metadata_snap >/dev/null && \
(era_invalidate --metadata-snapshot --written-since $ERA $METADATA_DEVICE | era_copy --progress $GRANULARITY /dev/mapper/$ERA_DEVICE | gzip)" | \
gzip -d | era_apply $DIR/$FILE) && \
(ssh root@$HOST "dmsetup status $ERA_DEVICE | perl -e 'print [split /\s+/, <>]->[5]'" > $DIR/era) || exit 1
(ssh root@$HOST "dmsetup status $ERA_DEVICE | perl -e 'print [split /\s+/, <>]->[5]'" > $DIR/era_new) || exit 1
mv $DIR/era_new $DIR/era
fi
done