marco.locatelli@steamware.net
80 lines
2.8 KiB
Bash
80 lines
2.8 KiB
Bash
#!/bin/bash
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set -euo pipefail
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ulimit -n 65536
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BACKUP_BASE=/var/backups/nfs
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PREFIX=backup-logic-
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TIMESTAMP=$(date +%Y%m%d-%H%M%S)
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TARGET="$BACKUP_BASE/${PREFIX}${TIMESTAMP}"
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DUMPFILE="$TARGET/all-dbs.sql"
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LOGFILE=/var/log/mariadb-backup.log
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LOCKFILE=/var/lock/mariadb-backup.lock
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# mysqldump bin e opzioni (root senza password: non passiamo --defaults-file)
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MYSQLDUMP_BIN=$(command -v mysqldump || true)
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MYSQLDUMP_OPTS="--user=root --all-databases --single-transaction --quick --lock-tables=FALSE"
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# assicurati che il logfile esista e abbia permessi restrittivi
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touch "$LOGFILE"
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chown root:root "$LOGFILE"
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chmod 600 "$LOGFILE"
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#verifico file lock per non sovrapporre backup
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(
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flock -n 9 || { echo "[$(date '+%F %T')] SKIP: another backup is running" >> "$LOGFILE"; exit 0; }
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if [ -z "$MYSQLDUMP_BIN" ]; then
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echo "[$(date '+%F %T')] ERROR: mysqldump not found in PATH" >> "$LOGFILE"
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exit 1
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fi
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mkdir -p "$TARGET"
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chown mysql:mysql "$TARGET"
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chmod 750 "$TARGET"
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TMPLOG=$(mktemp /tmp/mariadb-backup-logic.XXXXXX)
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echo "---------------------" >> "$LOGFILE"
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echo "[$(date '+%F %T')] START logic backup $TARGET" >> "$LOGFILE"
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# esegui il dump: stdout -> file, stderr -> TMPLOG
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if $MYSQLDUMP_BIN $MYSQLDUMP_OPTS >"$DUMPFILE" 2>"$TMPLOG"; then
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echo "[$(date '+%F %T')] END logic backup $TARGET" >> "$LOGFILE"
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# misura dimensione apparente (byte logici)
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size_apparent_bytes=$(find "$TARGET" -type f -printf '%s\n' 2>/dev/null | awk '{s+=$1} END{print s+0}')
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size_apparent_human=$(numfmt --to=iec --suffix=B "$size_apparent_bytes" 2>/dev/null || echo "${size_apparent_bytes}B")
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# misura spazio su disco effettivo (byte allocati)
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size_disk_bytes=$(du -s --block-size=1 "$TARGET" 2>/dev/null | cut -f1 || echo 0)
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size_disk_human=$(numfmt --to=iec --suffix=B "$size_disk_bytes" 2>/dev/null || echo "${size_disk_bytes}B")
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echo "[$(date '+%F %T')] SIZE apparent: $size_apparent_human ($size_apparent_bytes bytes) for $TARGET" >> "$LOGFILE"
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echo "[$(date '+%F %T')] SIZE on-disk: $size_disk_human ($size_disk_bytes bytes) for $TARGET" >> "$LOGFILE"
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echo "[$(date '+%F %T')] RESULT: OK, no errors" >> "$LOGFILE"
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rm -f "$TMPLOG"
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else
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echo "[$(date '+%F %T')] ERROR during logic backup for $TARGET. See $TMPLOG" >> "$LOGFILE"
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tail -n 200 "$TMPLOG" >> "$LOGFILE"
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rm -f "$TMPLOG"
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exit 1
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fi
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# rotazione: mantieni 7 giorni per i logic (log dettagliato)
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TO_DELETE=$(find "$BACKUP_BASE" -maxdepth 1 -type d -name "${PREFIX}*" -mtime +7 -print 2>/dev/null || true)
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if [ -n "$TO_DELETE" ]; then
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echo "[$(date '+%F %T')] ROTATE: removing old logic backups:" >> "$LOGFILE"
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echo "$TO_DELETE" >> "$LOGFILE"
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echo "$TO_DELETE" | tr '\n' '\0' | xargs -0 -r rm -rf --
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else
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echo "[$(date '+%F %T')] ROTATE: no logic backups to remove (<=7 days)" >> "$LOGFILE"
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fi
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echo " " >> "$LOGFILE"
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) 9>"$LOCKFILE"
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