Bug: Testcontainer fails to fetch server api version on 4.11 but works on 4.10

**Describe the bug**

Hey seems like you released a new minor version 2 hours ago and it has a bug in it.

Bug: Testcontainer fails to fetch server api version on 4.11 but works on 4.10
**To Reproduce**

Install version 4.11 and try to run the `from testcontainers.mssql import DbContainer, SqlServerContainer`

```python
>>> from testcontainers.mssql import DbContainer, SqlServerContainer
Traceback (most recent call last):
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/urllib3/connectionpool.py", line 787, in urlopen
    response = self._make_request(
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/urllib3/connectionpool.py", line 493, in _make_request
    conn.request(
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/urllib3/connection.py", line 445, in request
    self.endheaders()
  File "/home/bartek/.local/share/uv/python/cpython-3.10.8-linux-x86_64-gnu/lib/python3.10/http/client.py", line 1277, in endheaders
    self._send_output(message_body, encode_chunked=encode_chunked)
  File "/home/bartek/.local/share/uv/python/cpython-3.10.8-linux-x86_64-gnu/lib/python3.10/http/client.py", line 1037, in _send_output
    self.send(msg)
  File "/home/bartek/.local/share/uv/python/cpython-3.10.8-linux-x86_64-gnu/lib/python3.10/http/client.py", line 975, in send
    self.connect()
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/docker/transport/unixconn.py", line 26, in connect
    sock.connect(self.unix_socket)
FileNotFoundError: [Errno 2] No such file or directory

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/requests/adapters.py", line 667, in send
    resp = conn.urlopen(
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/urllib3/connectionpool.py", line 841, in urlopen
    retries = retries.increment(
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/urllib3/util/retry.py", line 474, in increment
    raise reraise(type(error), error, _stacktrace)
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/urllib3/util/util.py", line 38, in reraise
    raise value.with_traceback(tb)
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/urllib3/connectionpool.py", line 787, in urlopen
    response = self._make_request(
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/urllib3/connectionpool.py", line 493, in _make_request
    conn.request(
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/urllib3/connection.py", line 445, in request
    self.endheaders()
  File "/home/bartek/.local/share/uv/python/cpython-3.10.8-linux-x86_64-gnu/lib/python3.10/http/client.py", line 1277, in endheaders
    self._send_output(message_body, encode_chunked=encode_chunked)
  File "/home/bartek/.local/share/uv/python/cpython-3.10.8-linux-x86_64-gnu/lib/python3.10/http/client.py", line 1037, in _send_output
    self.send(msg)
  File "/home/bartek/.local/share/uv/python/cpython-3.10.8-linux-x86_64-gnu/lib/python3.10/http/client.py", line 975, in send
    self.connect()
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/docker/transport/unixconn.py", line 26, in connect
    sock.connect(self.unix_socket)
urllib3.exceptions.ProtocolError: ('Connection aborted.', FileNotFoundError(2, 'No such file or directory'))

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/docker/api/client.py", line 223, in _retrieve_server_version
    return self.version(api_version=False)["ApiVersion"]
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/docker/api/daemon.py", line 181, in version
    return self._result(self._get(url), json=True)
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/docker/utils/decorators.py", line 44, in inner
    return f(self, *args, **kwargs)
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/docker/api/client.py", line 246, in _get
    return self.get(url, **self._set_request_timeout(kwargs))
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/requests/sessions.py", line 602, in get
    return self.request("GET", url, **kwargs)
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/requests/sessions.py", line 589, in request
    resp = self.send(prep, **send_kwargs)
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/requests/sessions.py", line 703, in send
    r = adapter.send(request, **kwargs)
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/requests/adapters.py", line 682, in send
    raise ConnectionError(err, request=request)
requests.exceptions.ConnectionError: ('Connection aborted.', FileNotFoundError(2, 'No such file or directory'))

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/testcontainers/mssql/__init__.py", line 4, in <module>
    from testcontainers.core.generic import DbContainer
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/testcontainers/core/generic.py", line 16, in <module>
    from testcontainers.core.container import DockerContainer
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/testcontainers/core/container.py", line 12, in <module>
    from testcontainers.core.config import ConnectionMode
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/testcontainers/core/config.py", line 52, in <module>
    RYUK_DOCKER_SOCKET: str = get_docker_socket()
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/testcontainers/core/config.py", line 36, in get_docker_socket
    client = docker.from_env()
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/docker/client.py", line 94, in from_env
    return cls(
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/docker/client.py", line 45, in __init__
    self.api = APIClient(*args, **kwargs)
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/docker/api/client.py", line 207, in __init__
    self._version = self._retrieve_server_version()
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/docker/api/client.py", line 230, in _retrieve_server_version
    raise DockerException(
docker.errors.DockerException: Error while fetching server API version: ('Connection aborted.', FileNotFoundError(2, 'No such file or directory'))
```

**Runtime environment**

Ubuntu, python 3.10.8
```
(bartek) &#10140;  ~ git:(main) &#10007; uv pip list
Package            Version
------------------ ---------
certifi            2025.6.15
charset-normalizer 3.4.2
docker             7.1.0
idna               3.10
python-dotenv      1.1.0
requests           2.32.4
testcontainers     4.11.0
typing-extensions  4.14.0
urllib3            2.4.0
wrapt              1.17.2
```

# EDIT:
## I took a dig myself to try to find the culprit
kudos to @chbndrhnns to realizing it connects
### 4.10

`testcontainers/core/config.py: 34`
- `RYUK_DOCKER_SOCKET: str = environ.get("TESTCONTAINERS_DOCKER_SOCKET_OVERRIDE", "/var/run/docker.sock")`

### 4.11
`testcontainers/core/config.py:52`
- `RYUK_DOCKER_SOCKET: str = get_docker_socket()`

Where the `get_docker_socket` connects

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Bug: Testcontainer fails to fetch server api version on 4.11 but works on 4.10 #830

EDIT:

I took a dig myself to try to find the culprit

4.10

4.11

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Bug: Testcontainer fails to fetch server api version on 4.11 but works on 4.10 #830

Description

EDIT:

I took a dig myself to try to find the culprit

4.10

4.11

Metadata

Metadata

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