vasyansk
3183bf5267
docker-build / Build image (push) Successful in 25s
Add KEEP_LAST environment variable to always preserve the N most recent backups regardless of age, preventing data loss when backups haven't been created for extended periods. Defaults to 10 copies.
53 lines
1.6 KiB
Bash
Executable File
53 lines
1.6 KiB
Bash
Executable File
#!/bin/bash
|
|
|
|
set -u
|
|
|
|
# Retention: delete backups older than DELETE_AFTER days, but always keep
|
|
# at least KEEP_LAST most recent copies regardless of their age.
|
|
DATE_NOW=$(date +%s)
|
|
DEST="${MINIO_PATH%/}/"
|
|
KEEP_LAST="${KEEP_LAST:-10}"
|
|
|
|
case "$KEEP_LAST" in
|
|
''|*[!0-9]*) echo "WARN: KEEP_LAST is not a number ('$KEEP_LAST'), falling back to 10"; KEEP_LAST=10 ;;
|
|
esac
|
|
|
|
LIST=$(mktemp)
|
|
trap 'rm -f "$LIST"' EXIT
|
|
|
|
# `rclone ls` prints "<size> <path>". Filenames are sqlite_<YYYY-MM-DD-HHMMSS>.tar.gz,
|
|
# so a reverse lexicographic sort is a reverse chronological sort.
|
|
/scripts/minio_uploader.sh list "$DEST" \
|
|
| awk '{ print $2 }' \
|
|
| grep "^sqlite_" \
|
|
| sort -r > "$LIST"
|
|
|
|
TOTAL=$(wc -l < "$LIST" | tr -d ' ')
|
|
echo "Found $TOTAL backups, keeping at least $KEEP_LAST most recent, max age $DELETE_AFTER days"
|
|
|
|
if [ "$TOTAL" -le "$KEEP_LAST" ]; then
|
|
echo "Nothing to rotate: $TOTAL backups <= KEEP_LAST=$KEEP_LAST"
|
|
exit 0
|
|
fi
|
|
|
|
# Only the tail beyond the protected window is a candidate for deletion.
|
|
tail -n "+$((KEEP_LAST + 1))" "$LIST" | while read -r BACKUP_FILENAME
|
|
do
|
|
[ -n "$BACKUP_FILENAME" ] || continue
|
|
|
|
BACKUP_DATE=$(echo "$BACKUP_FILENAME" | awk 'BEGIN { FS = "[_-]" } ; { printf "%s-%s-%s",$2,$3,$4 }')
|
|
|
|
if [[ $BACKUP_DATE =~ ^[0-9]{4}-[0-9]{2}-[0-9]{2}$ ]]
|
|
then
|
|
BACKUP_DATE_SECS=$(date -d "$BACKUP_DATE" +%s)
|
|
|
|
DAYS_DIFF=$(( (DATE_NOW - BACKUP_DATE_SECS) / (60*60*24) ))
|
|
|
|
if [ "$DAYS_DIFF" -gt "$DELETE_AFTER" ]
|
|
then
|
|
echo "File $BACKUP_FILENAME is $DAYS_DIFF days old (greater than $DELETE_AFTER days). Deleting it."
|
|
/scripts/minio_uploader.sh delete "${DEST}${BACKUP_FILENAME}"
|
|
fi
|
|
fi
|
|
done
|