v0.0.16 | Floating IP attach/detach API 추가

- FloatingIpAttachView: LB의 vip_port_id를 조회하여 Floating IP 연결
- FloatingIpDetachView: Floating IP 연결 해제

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

nhn/views.py

@@ -599,6 +599,58 @@ class FloatingIpListView(NHNBaseView):
             return Response({"error": e.message}, status=status.HTTP_400_BAD_REQUEST)
 
 
+class FloatingIpAttachView(NHNBaseView):
+    """Floating IP를 로드밸런서에 연결"""
+
+    @swagger_auto_schema(
+        operation_summary="Floating IP를 로드밸런서 VIP 포트에 연결",
+        manual_parameters=[region_header, token_header],
+        responses={200: "연결된 Floating IP 정보"},
+    )
+    def post(self, request, floating_ip_id):
+        headers = get_nhn_headers(request)
+        loadbalancer_id = request.data.get("loadbalancer_id")
+        if not loadbalancer_id:
+            return Response({"error": "loadbalancer_id가 필요합니다."}, status=status.HTTP_400_BAD_REQUEST)
+
+        try:
+            # LB 상세 조회하여 vip_port_id 추출
+            lb_api = ApiLoadBalancer(headers["region"], headers["token"])
+            lb_info = lb_api.get_loadbalancer_info(loadbalancer_id)
+            vip_port_id = lb_info.get("loadbalancer", {}).get("vip_port_id")
+            if not vip_port_id:
+                return Response({"error": "로드밸런서 VIP 포트를 찾을 수 없습니다."}, status=status.HTTP_400_BAD_REQUEST)
+
+            # FIP를 VIP 포트에 연결
+            vpc_api = ApiVpc(headers["region"], headers["token"])
+            result = vpc_api.attach_floating_ip(floating_ip_id, vip_port_id)
+            logger.info(f"[FIP] Floating IP {floating_ip_id} → LB {loadbalancer_id} (port={vip_port_id}) 연결 성공")
+            return Response(result)
+        except NHNCloudAPIError as e:
+            logger.error(f"[FIP] Floating IP 연결 실패 - error={e.message}")
+            return Response({"error": e.message}, status=status.HTTP_400_BAD_REQUEST)
+
+
+class FloatingIpDetachView(NHNBaseView):
+    """Floating IP 연결 해제"""
+
+    @swagger_auto_schema(
+        operation_summary="Floating IP 연결 해제",
+        manual_parameters=[region_header, token_header],
+        responses={200: "해제된 Floating IP 정보"},
+    )
+    def post(self, request, floating_ip_id):
+        headers = get_nhn_headers(request)
+        try:
+            vpc_api = ApiVpc(headers["region"], headers["token"])
+            result = vpc_api.detach_floating_ip(floating_ip_id)
+            logger.info(f"[FIP] Floating IP {floating_ip_id} 연결 해제 성공")
+            return Response(result)
+        except NHNCloudAPIError as e:
+            logger.error(f"[FIP] Floating IP 연결 해제 실패 - error={e.message}")
+            return Response({"error": e.message}, status=status.HTTP_400_BAD_REQUEST)
+
+
 # ==================== Security Group API ====================