backup-root.sh

#!/bin/bash

SOURCEDIR="/"
TARGETDIR="/path/to/backup/location" #this one must not end with a / !!!!
EXCLUDELIST="/path/to/backup-root-exclude-list.txt"

LOGDIR="/path/to/rootbackup/logs/"
mkdir -p "$LOGDIR"
LOGFILE="$LOGDIR/rsync-backup-root-$(date '+%Y-%m-%d_%H-%M-%S').log"


echo "SOURCEDIR   : $SOURCEDIR" >> "$LOGFILE"
echo "TARGETDIR   : $TARGETDIR" >> "$LOGFILE"
echo "EXCLUDELIST : $EXCLUDELIST" >> "$LOGFILE"
echo "LOGDIR      : $LOGDIR" >> "$LOGFILE"

echo "" >> "$LOGFILE"
echo "[$(date '+%Y-%m-%d %H:%M:%S')] Starting rsync job" >> "$LOGFILE"
echo "" >> "$LOGFILE"

# DRY-RUN:
rsync --dry-run -axv --progress -s --exclude-from="$EXCLUDELIST" "$SOURCEDIR" "$TARGETDIR" >> "$LOGFILE" 2>&1

# REAL BACKUP
# rsync -axv -s --delete --exclude-from="$EXCLUDELIST" "$SOURCEDIR" "$TARGETDIR" >> "$LOGFILE" 2>&1


# STATUS
echo "" >> "$LOGFILE"

STATUS=$?
if [ $STATUS -eq 0 ]; then
  echo "[$(date '+%Y-%m-%d %H:%M:%S')] rsync job completed successfully :)" >> "$LOGFILE"
else
  echo "[$(date '+%Y-%m-%d %H:%M:%S')] rsync job !!! FAILED !!! with status $STATUS" >> "$LOGFILE"
fi

# LOG ROTATION LOGIC
echo "" >> "$LOGFILE"

# Get list of all log files, sorted by timestamp (oldest first)
LOGS=($(find "$LOGDIR" -type f -name 'rsync-backup-root*.log' -printf '%f\n' | sort))
TOTAL_LOGS=${#LOGS[@]}

if [ $TOTAL_LOGS -lt 2 ]; then
  # Only one or zero logs, nothing to rotate
  echo "[$(date '+%Y-%m-%d %H:%M:%S')] No log rotation needed (less than 2 logs)" >> "$LOGFILE"
else
  # Always keep the very oldest log (${LOGS[0]})
  # Rotate: keep up to 30 newest logs (${LOGS[-20..-1]} in bash array)
  # Delete all others except the oldest and the newest 30
  for ((i=1; i<TOTAL_LOGS-30; i++)); do
    if [ $i -lt $TOTAL_LOGS ]; then
      echo "[$(date '+%Y-%m-%d %H:%M:%S')] Removing old log: ${LOGS[$i]}" >> "$LOGFILE"
      rm -f "$LOGDIR/${LOGS[$i]}"
    fi
  done
fi