# 安裝 NFS Client 功能
    Enable-WindowsOptionalFeature -FeatureName ServicesForNFS-ClientOnly -Online -All

    # 啟動 NFS Client 服務
    Start-Service -Name NfsClnt
    Set-Service -Name NfsClnt -StartupType Automatic

    # 啟動相關服務
    Start-Service -Name NfsRdr
    Set-Service -Name NfsRdr -StartupType Automatic

    # 檢查服務狀態
    Get-Service -Name NfsClnt, NfsRdr
    
    # 啟動 Client 掛載 Z:
    C:\Windows\System32\mount.exe -o anon \\192.168.168.101\nfs Z:
    # 啟動 Client 掛載 Y:
    C:\Windows\System32\mount.exe -o anon \\192.168.100.141\nfs Y:
    # 安全移除 Z: 掛載
    umount Z:

echo "===== 執行腳本 $0 ====="
echo "完整路徑: $(readlink -f "$0")"
echo "檔名: $(basename "$0")"
echo "當前時間: $(date)"
echo "主機名稱: $(hostname)"

echo "Setting up NFS Server..."

# 安裝 NFS Server
if ! dpkg -l | grep -q nfs-kernel-server; then
	echo "Installing NFS packages..."
	apt update
	apt install -y nfs-kernel-server nfs-common
	echo "✓ NFS packages installed"
else
	echo "✓ NFS packages already installed"
fi

echo "建立 NFS 共享目錄 /nfs"
mkdir -p /nfs
echo "設定目錄權限為 777 (任何人可讀寫執行)..."
chmod -R 777 /nfs

# 配置 NFS 匯出
# all_squash 所有用戶都被映射為匿名用戶
echo "Configuring NFS exports..."
if ! grep -q "# NFS Server Shared Directory" /etc/exports; then
	cat >>/etc/exports <<'EOF'

# NFS Server Shared Directory
/nfs  192.168.100.0/24(rw,sync,no_subtree_check,no_root_squash) \
      192.168.168.0/24(rw,sync,no_subtree_check,no_root_squash)
EOF
	echo "✓ NFS export configured"
else
	echo "✓ NFS export already configured"
fi

# 應用 NFS 配置並啟動服務
echo "Starting NFS services..."
exportfs -ra
systemctl restart nfs-kernel-server
systemctl enable nfs-kernel-server
echo "✓ NFS Server started and enabled"

# 驗證 NFS 匯出
echo ""
echo "NFS Export Status:"
exportfs -v
echo ""
showmount -e localhost
echo "more option"
echo "
#1. 取消所有 export（會移除所有現有的 NFS 匯出）
exportfs -ua
# 2. 重新 export /etc/exports 內容
exportfs -ra
# 3. 檢查現有匯出
exportfs -v"

echo "===== 腳本執行完成 ====="

echo "===== 執行腳本 $0 ====="
echo "完整路徑: $(readlink -f "$0")"
echo "檔名: $(basename "$0")"
echo "當前時間: $(date)"
echo "主機名稱: $(hostname)"

echo "Setting up NFS Client..."
# 接收第一個參數作為 NFS Server IP，如果沒有提供則使用預設值
PRIMARY_IP="${1:-192.168.168.101}"
echo "NFS Server IP: ${PRIMARY_IP}"
NODE_IP=$(ip -4 addr show eth0 | grep -oP '(?<=inet\s)\d+(\.\d+){3}' | head -1)

# 安裝 NFS Client
if ! dpkg -l | grep -q nfs-common; then
	echo "Installing NFS client packages..."
	apt update
	apt install -y nfs-common
	echo "✓ NFS client packages installed"
else
	echo "✓ NFS client packages already installed"
fi

# 驗證可以看到 NFS Server 的匯出
echo ""
echo "Checking NFS Server exports from ${PRIMARY_IP}:"
showmount -e ${PRIMARY_IP}

# 建立掛載點
echo ""
echo "mkdir /nfs..."
mkdir -p /nfs

# 檢查是否已經掛載
if mountpoint -q /nfs; then
	echo "✓ /nfs is already mounted"
	umount /nfs
	echo "Unmounted existing /nfs to remount"
fi

# 掛載 NFS
echo ""
echo "Mounting NFS from ${PRIMARY_IP}:/nfs to /nfs..."
if mount -t nfs ${PRIMARY_IP}:/nfs /nfs; then
	echo "✓ NFS mount successful"

	# 測試讀寫
	echo "Testing read/write..."
	mkdir -p /nfs/data
	echo "test from node ${NODE_IP} at $(date)" >/nfs/data/test-${NODE_IP##*.}.txt
	cat /nfs/data/test-${NODE_IP##*.}.txt
	echo "✓ NFS read/write test passed"

	# 設定開機重新掛載
	echo "Configuring auto-mount on boot..."
	if ! grep -q "${PRIMARY_IP}:/nfs" /etc/fstab; then
		echo "${PRIMARY_IP}:/nfs  /nfs  nfs  defaults  0  0" >>/etc/fstab
		echo "✓ Added to /etc/fstab for auto-mount on boot"
	else
		echo "✓ Already configured in /etc/fstab"
	fi

	echo ""
	echo "Current mount status:"
	df -h | grep nfs
else
	echo "✗ NFS mount failed - check network connectivity and NFS Server status"
	exit 1
fi

echo "
#1. 取消所有 export（會移除所有現有的 NFS 匯出）
exportfs -ua
# 2. 重新 export /etc/exports 內容
exportfs -ra
# 3. 檢查現有匯出
exportfs -v"

echo "===== 腳本執行完成 ====="

#1. 取消所有 export（會移除所有現有的 NFS 匯出）
exportfs -ua
# 2. 重新 export /etc/exports 內容
exportfs -ra
# 3. 檢查現有匯出
exportfs -v"

# Server 查看 NFS 日誌
journalctl -u nfs-kernel-server -f

# Server 確認 exports 設定
nano /etc/exports

# Client 查看掛載詳細信息
mount -v -t nfs 192.168.100.141:/nfs /nfs
# 查看 NFS 統計
nfsstat
# 測試網路連接
showmount -e 192.168.100.141

# client 確認目錄權限
ls -ld /nfs

# client 確認是否有掛載
mount | grep nfs
# 應該顯示：192.168.100.141:/nfs on /nfs type nfs ...

# Client 測試寫入權限
touch /nfs/test.txt
mkdir /nfs/testdir