サーバータスクの自動化

サーバータスクを自動化する

Bashで自動化する理由

簡単なバックアップをスクリプト化する

バックアップスクリプトのデモ

#!/bin/bash

BACKUP_DIR="/tmp/coddykit_backups"
SOURCE_DIR="/tmp/coddykit_data_to_backup"

# Create backup and source directories if they don't exist
mkdir -p "$BACKUP_DIR"
mkdir -p "$SOURCE_DIR"

# Create some dummy files to back up
echo "Content for file1" > "${SOURCE_DIR}/file1.txt"
echo "Content for file2" > "${SOURCE_DIR}/file2.txt"

# Generate a timestamp for the backup file
TIMESTAMP=$(date +%Y%m%d_%H%M%S)
BACKUP_FILE="${BACKUP_DIR}/data_backup_${TIMESTAMP}.tar.gz"

echo "Creating backup of $SOURCE_DIR..."
# Create a compressed tar archive
tar -czf "$BACKUP_FILE" -C "${SOURCE_DIR}" .

echo "Backup created: $BACKUP_FILE"
echo "Contents of backup directory:"
ls -l "$BACKUP_DIR"

ログのクリーンアップを自動化する

ログクリーンアップスクリプトのデモ

#!/bin/bash

LOG_DIR="/tmp/coddykit_app_logs_demo"
OLD_MINUTES=1 # Files older than this will be deleted

mkdir -p "$LOG_DIR"

# Create a 'current' log file
touch "${LOG_DIR}/current_log_$(date +%H%M%S).log"

# Create an 'old' log file (simulated to be 2 minutes ago)
touch -d "2 minutes ago" "${LOG_DIR}/old_log_$(date +%H%M%S)_old.log"

echo "--- Before cleanup ---"
ls -l "$LOG_DIR"

echo "\nCleaning logs in $LOG_DIR older than $OLD_MINUTES minute(s)..."
# Find files in LOG_DIR that are regular files (*.log) and modified more than OLD_MINUTES ago
find "$LOG_DIR" -type f -name "*.log" -mmin +$OLD_MINUTES -delete

echo "\n--- After cleanup ---"
ls -l "$LOG_DIR"

サービスの再起動をスクリプト化する

サービス再起動スクリプトのデモ

#!/bin/bash

SERVICE_NAME="my-dummy-web-app"

echo "Simulating service management for: $SERVICE_NAME"

# Check if the service is active (simulated)
# In a real script: if ! systemctl is-active --quiet $SERVICE_NAME; then
if [ "$SERVICE_NAME" = "my-dummy-web-app" ]; then # Always true for demo
  echo "Service $SERVICE_NAME is currently 'inactive' (simulated)."
  echo "Attempting to restart $SERVICE_NAME..."
  
  # Restart the service (simulated)
  # In a real script: sudo systemctl restart $SERVICE_NAME
  echo "Service $SERVICE_NAME restarted successfully (simulated)."
else
  echo "Service $SERVICE_NAME is already running (simulated)."
fi

echo "\nRemember: For real services like 'nginx' or 'apache2', you'd use: sudo systemctl restart nginx"

基本的なシステムヘルスチェック

クイックチェック：ログのクリーンアップ

まとめと次のステップ