# 2주차 과제 - 호세헌 **URL:** \ **Category:** 컨트리뷰션\ **Tags:** 컨트리뷰션, 2025컨트리뷰션\ **Created:** [7월 26, 2025, 6:39오전 UTC](https://forum.openinfra-kr.org/t/topic/140 "2025-07-26T06:39:14Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![seheon](https://forum.openinfra-kr.org/letter_avatar_proxy/v4/letter/s/a9a28c/32.png) [@seheon](https://forum.openinfra-kr.org/u/seheon)\ **Post date:** [7월 26, 2025, 6:39오전 UTC](https://forum.openinfra-kr.org/t/topic/140/1 "2025-07-26T06:39:15Z")
# 필수 과제 > server list는 아래와 같이 한정된 값만 출력을 해주고 있습니다. > 결과값에 project name , user name을 포함시켜서 출력되게 해주세요. ## 초기 ```python data = list(compute_client.servers(**search_opts)) for s in data: print(s) ``` `search_opts` 조건으로 서버 목록을 조회합니다. `openstack.compute.v2.server.Server` 객체들이 출력되는 것을 확인할 수 있습니다. 이 출력에는 `tenant_id`, `user_id`, `location.project.name` 등의 정보가 포함되어 있습니다. ```bash openstack.compute.v2.server.Server(id=182eef16-2d78-41c0-a962-c2e75cfc0699, name=cirros-instance, status=ACTIVE, tenant_id=5bbf3e275f984ec88409ee3169110457, user_id=54c9c618ceff42478c721eab531051df, metadata={}, hostId=878c6089e0f2518b4921f22d4c2aa8bbd90b3ba516dc43db2558ba97, image=, flavor={'vcpus': 1, 'ram': 256, 'disk': 1, 'ephemeral': 0, 'swap': 0, 'original_name': 'cirros256', 'extra_specs': {'hw_rng:allowed': 'True'}}, created=2025-07-16T07:12:06Z, updated=2025-07-16T07:12:35Z, addresses={'shared': [{'version': 4, 'addr': '192.168.233.187', 'OS-EXT-IPS:type': 'fixed', 'OS-EXT-IPS-MAC:mac_addr': 'fa:16:3e:0b:2e:c9'}, {'version': 4, 'addr': '192.168.100.59', 'OS-EXT-IPS:type': 'floating', 'OS-EXT-IPS-MAC:mac_addr': 'fa:16:3e:0b:2e:c9'}]}, accessIPv4=, accessIPv6=, links=[{'rel': 'self', 'href': 'http://133.186.203.38/compute/v2.1/servers/182eef16-2d78-41c0-a962-c2e75cfc0699'}, {'rel': 'bookmark', 'href': 'http://133.186.203.38/compute/servers/182eef16-2d78-41c0-a962-c2e75cfc0699'}], OS-DCF:diskConfig=AUTO, progress=0, OS-EXT-AZ:availability_zone=nova, pinned_availability_zone=nova, OS-SCH-HNT:scheduler_hints={}, config_drive=, key_name=None, OS-SRV-USG:launched_at=2025-07-16T07:12:34.000000, OS-SRV-USG:terminated_at=None, OS-EXT-SRV-ATTR:host=devstack, OS-EXT-SRV-ATTR:instance_name=instance-00000001, OS-EXT-SRV-ATTR:hypervisor_hostname=devstack.novalocal, OS-EXT-SRV-ATTR:reservation_id=r-nrmh6cpa, OS-EXT-SRV-ATTR:launch_index=0, OS-EXT-SRV-ATTR:hostname=cirros-instance, OS-EXT-SRV-ATTR:kernel_id=, OS-EXT-SRV-ATTR:ramdisk_id=, OS-EXT-SRV-ATTR:root_device_name=/dev/vda, OS-EXT-SRV-ATTR:user_data=None, OS-EXT-STS:task_state=None, OS-EXT-STS:vm_state=active, OS-EXT-STS:power_state=1, os-extended-volumes:volumes_attached=[{'id': '9ef4368c-4fd4-464c-b737-f079be71374b', 'delete_on_termination': True}], locked=False, locked_reason=None, description=None, tags=[], trusted_image_certificates=None, host_status=UP, security_groups=[{'name': 'default'}], location=Munch({'cloud': 'envvars', 'region_name': 'RegionOne', 'zone': 'nova', 'project': Munch({'id': '5bbf3e275f984ec88409ee3169110457', `'name': 'admin'`, 'domain_id': 'default', 'domain_name': None})})) ``` ```python # project_name, user_name data = list(compute_client.servers(**search_opts)) for s in data: s.project_name = s.location.project.name s.user_name = identity_client.users.get(s.user_id).name if s.user_id else 'N/A' ``` **문제점:** `identity_client.users.get()`는 서버 개수만큼 API 호출이 발생합니다. ## 개선 ```python projects_map = {p.id: p.name for p in identity_client.projects.list()} users_map = {u.id: u.name for u in identity_client.users.list()} ``` `projects_map`, `users_map` 로 미리 수집합니다. ```python ... # project_name, user_name data = list(compute_client.servers(**search_opts)) for s in data: s.project_name = projects_map.get(getattr(s, "project_id", getattr(s, "tenant_id", None)), "") s.user_name = users_map.get(getattr(s, "user_id", None), "") images = {} flavors = {} ... ``` ```python ... columns: tuple[str, ...] = ( 'id', 'name', 'status', 'project_name', 'user_name', ) column_headers: tuple[str, ...] = ( 'ID', 'Name', 'Status', 'Project Name', 'User Name', ) ... ``` ![image](https://forum.openinfra-kr.org/uploads/default/original/1X/d1a80f8b3eaf5d842e36b5f1518614df0dff1148.png) # 선택 과제 > openstack server list를 입력했을 때 take\_action()함수를 찾아가는 과정 분석해보기 ```json // launch.json { "version": "0.2.0", "configurations": [ { ... "args": [ "server", "list" ], "env": { ... } } ] } ``` ## 1. 시작점: `main()` 함수 ```python # ./python-openstackclient/openstackclient/shell.py def main(argv=None): if argv is None: argv = sys.argv[1:] return OpenStackShell().run(argv) if __name__ == " __main__": sys.exit(main()) ``` `argv = ['server', 'list']` 가 전달되어 `OpenStackShell.run(argv)` 을 호출합니다. ## 2. `OpenStackShell.run()` → `App.run(argv)` 호출 ```python # python-openstackclient/openstackclient class OpenStackShell(app.App): ... def __init__ (..): ... def configure_logging(self): ... def run(self, argv: list[str]) -> int: ret_val = 1 self.command_options = argv try: ret_val = super().run(argv) # 부모 클래스 호출 return ret_val ... ``` ## 3. App.run(argv) 클래스 ```python class App: ... def run(self, argv: list[str]) -> int: ... self.options, remainder = self.parser.parse_known_args(argv) # remainder = ['server', 'list'] ... self.initialize_app(remainder) ... self.run_subcommand(remainder) ``` 이때 `server`는 **command group** , `list`는 **command name** 입니다. ## 4. `App.run_subcommand()` 내부에서 해당 command를 로드 이 함수는 cliff의 핵심 기능 중 하나로, `'server list'` 명령에 해당하는 Command 클래스를 찾아서 해당 클래스의 `take_action()`을 실행합니다. ```python def run_subcommand(self, argv: list[str]) -> int: ... subcommand = self.command_manager.find_command(argv) # ['server', 'list'] → ('ListServer', 'server list', ['list']) ... cmd_factory, cmd_name, sub_argv = subcommand .. cmd = cmd_factory(self, self.options, **kwargs) # → ListServer 인스턴스 생성 ... result = cmd.run(parsed_args) # → 내부에서 take_action(parsed_args) 호출 # ListServer의 take_action() 실행 ```