marco.locatelli@steamware.net
77 lines
2.7 KiB
Bash
77 lines
2.7 KiB
Bash
#!/bin/bash
|
|
set -euo pipefail
|
|
|
|
ulimit -n 65536
|
|
|
|
BACKUP_BASE=/var/lib/mariadb-backup
|
|
FULL_PREFIX=backup-full-
|
|
INC_PREFIX=backup-inc-
|
|
TIMESTAMP=$(date +%Y%m%d-%H%M%S)
|
|
TARGET="$BACKUP_BASE/${INC_PREFIX}${TIMESTAMP}"
|
|
LOGFILE=/var/log/mariadb-backup.log
|
|
LOCKFILE=/var/lock/mariadb-backup.lock
|
|
|
|
touch "$LOGFILE"
|
|
chown root:root "$LOGFILE"
|
|
chmod 600 "$LOGFILE"
|
|
|
|
(
|
|
flock -n 9 || { echo "[$(date '+%F %T')] SKIP: another backup is running" >> "$LOGFILE"; exit 0; }
|
|
|
|
LATEST_FULL=$(ls -1d ${BACKUP_BASE}/${FULL_PREFIX}* 2>/dev/null | sort | tail -n1 || true)
|
|
|
|
if [ -z "$LATEST_FULL" ]; then
|
|
echo "[$(date '+%F %T')] ERROR: no full backup found in $BACKUP_BASE. Create a full backup first." >> "$LOGFILE"
|
|
exit 1
|
|
fi
|
|
|
|
BASE_DIR="$LATEST_FULL"
|
|
|
|
mkdir -p "$TARGET"
|
|
chown mysql:mysql "$TARGET"
|
|
chmod 750 "$TARGET"
|
|
|
|
TMPLOG=$(mktemp /tmp/mariadb-backup-inc.XXXXXX)
|
|
|
|
echo "---------------------" >> "$LOGFILE"
|
|
echo "[$(date '+%F %T')] START incremental backup $TARGET (base: $BASE_DIR)" >> "$LOGFILE"
|
|
|
|
if mariadb-backup --defaults-file=/etc/mysql/backup.conf --backup --target-dir="$TARGET" --incremental-basedir="$BASE_DIR" --verbose >"$TMPLOG" 2>&1; then
|
|
echo "[$(date '+%F %T')] END incremental backup $TARGET" >> "$LOGFILE"
|
|
|
|
# misura dimensione apparente (byte logici)
|
|
size_apparent_bytes=$(find "$TARGET" -type f -printf '%s\n' 2>/dev/null | awk '{s+=$1} END{print s+0}')
|
|
size_apparent_human=$(numfmt --to=iec --suffix=B "$size_apparent_bytes" 2>/dev/null || echo "${size_apparent_bytes}B")
|
|
|
|
# misura spazio su disco effettivo (byte allocati)
|
|
size_disk_bytes=$(du -s --block-size=1 "$TARGET" 2>/dev/null | cut -f1 || echo 0)
|
|
size_disk_human=$(numfmt --to=iec --suffix=B "$size_disk_bytes" 2>/dev/null || echo "${size_disk_bytes}B")
|
|
|
|
echo "[$(date '+%F %T')] SIZE apparent: $size_apparent_human ($size_apparent_bytes bytes) for $TARGET" >> "$LOGFILE"
|
|
echo "[$(date '+%F %T')] SIZE on-disk: $size_disk_human ($size_disk_bytes bytes) for $TARGET" >> "$LOGFILE"
|
|
|
|
echo "[$(date '+%F %T')] RESULT: OK, no errors" >> "$LOGFILE"
|
|
|
|
rm -f "$TMPLOG"
|
|
else
|
|
echo "[$(date '+%F %T')] ERROR during incremental backup for $TARGET. See $TMPLOG" >> "$LOGFILE"
|
|
tail -n 200 "$TMPLOG" >> "$LOGFILE"
|
|
rm -f "$TMPLOG"
|
|
exit 1
|
|
fi
|
|
|
|
# rotazione: mantieni esattamente 11 incrementali più recenti
|
|
cd "$BACKUP_BASE" || exit 1
|
|
TO_DELETE=$(ls -1d ${INC_PREFIX}* 2>/dev/null | sort | head -n -11 || true)
|
|
|
|
if [ -n "$TO_DELETE" ]; then
|
|
echo "[$(date '+%F %T')] ROTATE: removing old incrementals:" >> "$LOGFILE"
|
|
echo "$TO_DELETE" >> "$LOGFILE"
|
|
echo "$TO_DELETE" | xargs -r -d '\n' rm -rf --
|
|
else
|
|
echo "[$(date '+%F %T')] ROTATE: no incrementals to remove (<=11 present)" >> "$LOGFILE"
|
|
fi
|
|
|
|
echo " " >> "$LOGFILE"
|
|
|
|
) 9>"$LOCKFILE" |