Auto-install qemu-guest-agent package during image customization

README.md

@@ -262,7 +262,10 @@ proxmox-cloud-image -batch batch.txt
 ## How It Works
 
 1. Download cloud image dari URL yang diberikan
-2. Customize image (resize, inject SSH key jika ada)
+2. Customize image:
+   - Resize disk (jika di-specify)
+   - Inject SSH key (jika ada)
+   - **Install qemu-guest-agent package** (jika guest-agent enabled)
 3. Upload image ke Proxmox host via SCP
 4. Create VM menggunakan `qm` commands
 5. Import disk dan configure VM
@@ -280,11 +283,15 @@ QEMU Guest Agent adalah service yang berjalan di guest OS untuk:
 - File system freeze/thaw
 - Time synchronization
 
+**Tool ini akan otomatis install qemu-guest-agent package** ke dalam image menggunakan `virt-customize` sebelum upload ke Proxmox.
+
 Enable dengan flag `-guest-agent` atau di config file:
 ```yaml
 guest_agent: true
 ```
 
+**Note**: Guest agent di-enable by default. Package akan di-install otomatis saat customize image.
+
 ## Proxmox Firewall
 
 Proxmox firewall bisa di-enable untuk template dengan flag `-firewall` atau di config file:

customize.go

@@ -28,6 +28,12 @@ func customizeImage(config *Config) error {
 		}
 	}
 
+	if config.GuestAgent {
+		if err := installGuestAgent(imagePath); err != nil {
+			return err
+		}
+	}
+
 	fmt.Println("Verifying customized image...")
 	if err := verifyImage(imagePath); err != nil {
 		return fmt.Errorf("customized image verification failed: %w", err)
@@ -93,3 +99,22 @@ func injectSSHKey(imagePath, sshKeyPath string) error {
 
 	return nil
 }
+
+func installGuestAgent(imagePath string) error {
+	fmt.Println("Installing QEMU Guest Agent...")
+
+	cmd := exec.Command("virt-customize",
+		"-a", imagePath,
+		"--install", "qemu-guest-agent",
+		"--run-command", "systemctl enable qemu-guest-agent",
+	)
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+
+	if err := cmd.Run(); err != nil {
+		return fmt.Errorf("failed to install qemu-guest-agent: %w", err)
+	}
+
+	fmt.Println("QEMU Guest Agent installed and enabled!")
+	return nil
+}