Automate Log File Archiving and Rotation

#!/bin/bash

LOG_DIR="/var/log/my_app"
OLD_LOG_DIR="$LOG_DIR/archive"
LOG_FILE="application.log"
DATE=$(date +%Y-%m-%d)

# Create archive directory if it doesn't exist
mkdir -p "$OLD_LOG_DIR"

# Check if log file exists
if [ ! -f "$LOG_DIR/$LOG_FILE" ]; then
  echo "Log file $LOG_DIR/$LOG_FILE not found. Exiting."
  exit 0
fi

# Compress and move the current log file to archive
echo "Archiving $LOG_FILE to $OLD_LOG_DIR/${LOG_FILE}.${DATE}.gz"
CURRENT_LOG_PATH="$LOG_DIR/$LOG_FILE"
ARCHIVE_PATH="$OLD_LOG_DIR/${LOG_FILE}.${DATE}.gz"

gzip -c "$CURRENT_LOG_PATH" > "$ARCHIVE_PATH"

if [ $? -eq 0 ]; then
  # Truncate the original log file after successful archiving
  echo "" > "$CURRENT_LOG_PATH"
  echo "Log file archived and truncated successfully."
else
  echo "Error archiving log file. Original file not truncated."
  exit 1
fi

# Optional: Remove old archives (e.g., older than 30 days)
# find "$OLD_LOG_DIR" -name "*.gz" -type f -mtime +30 -delete
# echo "Removed log archives older than 30 days."