Basic Log File Rotation and Archiving

#!/bin/bash

LOG_DIR="/var/log/myapp" # Directory containing your application logs
LOG_FILE_PREFIX="access" # Prefix of your log files (e.g., access.log, error.log)
RETENTION_DAYS=7 # Number of days to keep rotated logs
ARCHIVE_DIR="${LOG_DIR}/archive"

mkdir -p "$ARCHIVE_DIR" # Ensure archive directory exists

echo "--- $(date +"%Y-%m-%d %H:%M:%S") --- Starting log rotation for $LOG_DIR"

# Find log files with the specified prefix
find "$LOG_DIR" -maxdepth 1 -type f -name "${LOG_FILE_PREFIX}*.log" | while read -r logfile; do
    if [ -f "$logfile" ]; then
        FILENAME=$(basename "$logfile")
        TIMESTAMP=$(date +"%Y%m%d%H%M%S")
        ARCHIVE_FILENAME="${FILENAME%.log}_${TIMESTAMP}.tar.gz"

        echo "Rotating and archiving: $logfile"
        tar -czf "$ARCHIVE_DIR/$ARCHIVE_FILENAME" "$logfile"
        if [ $? -eq 0 ]; then
            # Clear the original log file after successful archiving
            echo "" > "$logfile"
            echo "Archived '$FILENAME' to '$ARCHIVE_DIR/$ARCHIVE_FILENAME' and cleared original."
        else
            echo "Error: Failed to archive '$FILENAME'."
        fi
    fi
done

# Clean up old archives
echo "Cleaning up archives older than $RETENTION_DAYS days..."
find "$ARCHIVE_DIR" -type f -name "*.tar.gz" -mtime +"$RETENTION_DAYS" -delete

echo "--- $(date +"%Y-%m-%d %H:%M:%S") --- Log rotation complete."