Dockerで「Traceback (most recent call last):・・・」というエラーが出た時の対処法

docker-compose up -d

を実行したところ、下記のようなエラーが出ました。

Traceback (most recent call last):
  File "docker\api\client.py", line 214, in _retrieve_server_version
  File "docker\api\daemon.py", line 181, in version
  File "docker\utils\decorators.py", line 46, in inner
  File "docker\api\client.py", line 237, in _get
  File "requests\sessions.py", line 543, in get
  File "requests\sessions.py", line 530, in request
  File "requests\sessions.py", line 643, in send
  File "requests\adapters.py", line 439, in send
  File "urllib3\connectionpool.py", line 670, in urlopen
  File "urllib3\connectionpool.py", line 392, in _make_request
  File "http\client.py", line 1255, in request
  File "http\client.py", line 1301, in _send_request
  File "http\client.py", line 1250, in endheaders
  File "http\client.py", line 1010, in _send_output
  File "http\client.py", line 950, in send
  File "docker\transport\npipeconn.py", line 32, in connect
  File "docker\transport\npipesocket.py", line 23, in wrapped
  File "docker\transport\npipesocket.py", line 72, in connect
  File "docker\transport\npipesocket.py", line 52, in connect
pywintypes.error: (2, 'CreateFile', '指定されたファイルが見つかりません。')

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "docker-compose", line 3, in 
  File "compose\cli\main.py", line 81, in main
  File "compose\cli\main.py", line 200, in perform_command
  File "compose\cli\command.py", line 60, in project_from_options
  File "compose\cli\command.py", line 152, in get_project
  File "compose\cli\docker_client.py", line 41, in get_client
  File "compose\cli\docker_client.py", line 170, in docker_client
  File "docker\api\client.py", line 197, in __init__
  File "docker\api\client.py", line 221, in _retrieve_server_version
docker.errors.DockerException: Error while fetching server API version: (2, 'CreateFile', '指定されたファイルが
見つかりません。')
[157068] Failed to execute script docker-compose

原因はDockerアプリを起動せずに実行したこと。

Dockerアプリを起動完了したら実行できました。

Dockerを初めて起動した時に出たのならWSL2を有効化していない可能性があります。

おわりに

久しぶりにDockerに触ると使い方を忘れていました…。