Encountering "Error while fetching server API version: Not supported URL scheme http+docker"

[mhorlacher]

I'm using version 7.2.0 - I imagine this is related to this issue https://github.com/docker/docker-py/issues/3256? Machine is running ubuntu-22.04. Full traceback pasted below.

vagrant@node-1:/services$ docker-compose up
Traceback (most recent call last):
  File "/usr/local/lib/python3.10/dist-packages/requests/adapters.py", line 633, in send
    conn = self.get_connection_with_tls_context(
  File "/usr/local/lib/python3.10/dist-packages/requests/adapters.py", line 489, in get_connection_with_tls_context
    conn = self.poolmanager.connection_from_host(
  File "/usr/lib/python3/dist-packages/urllib3/poolmanager.py", line 245, in connection_from_host
    return self.connection_from_context(request_context)
  File "/usr/lib/python3/dist-packages/urllib3/poolmanager.py", line 257, in connection_from_context
    raise URLSchemeUnknown(scheme)
urllib3.exceptions.URLSchemeUnknown: Not supported URL scheme http+docker

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.10/dist-packages/docker/api/client.py", line 214, in _retrieve_server_version
    return self.version(api_version=False)["ApiVersion"]
  File "/usr/local/lib/python3.10/dist-packages/docker/api/daemon.py", line 181, in version
    return self._result(self._get(url), json=True)
  File "/usr/local/lib/python3.10/dist-packages/docker/utils/decorators.py", line 46, in inner
    return f(self, *args, **kwargs)
  File "/usr/local/lib/python3.10/dist-packages/docker/api/client.py", line 237, in _get
    return self.get(url, **self._set_request_timeout(kwargs))
  File "/usr/local/lib/python3.10/dist-packages/requests/sessions.py", line 602, in get
    return self.request("GET", url, **kwargs)
  File "/usr/local/lib/python3.10/dist-packages/requests/sessions.py", line 589, in request
    resp = self.send(prep, **send_kwargs)
  File "/usr/local/lib/python3.10/dist-packages/requests/sessions.py", line 703, in send
    r = adapter.send(request, **kwargs)
  File "/usr/local/lib/python3.10/dist-packages/requests/adapters.py", line 637, in send
    raise InvalidURL(e, request=request)
requests.exceptions.InvalidURL: Not supported URL scheme http+docker

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/bin/docker-compose", line 8, in <module>
    sys.exit(main())
  File "/usr/local/lib/python3.10/dist-packages/compose/cli/main.py", line 81, in main
    command_func()
  File "/usr/local/lib/python3.10/dist-packages/compose/cli/main.py", line 200, in perform_command
    project = project_from_options('.', options)
  File "/usr/local/lib/python3.10/dist-packages/compose/cli/command.py", line 60, in project_from_options
    return get_project(
  File "/usr/local/lib/python3.10/dist-packages/compose/cli/command.py", line 152, in get_project
    client = get_client(
  File "/usr/local/lib/python3.10/dist-packages/compose/cli/docker_client.py", line 41, in get_client
    client = docker_client(
  File "/usr/local/lib/python3.10/dist-packages/compose/cli/docker_client.py", line 170, in docker_client
    client = APIClient(use_ssh_client=not use_paramiko_ssh, **kwargs)
  File "/usr/local/lib/python3.10/dist-packages/docker/api/client.py", line 197, in __init__
    self._version = self._retrieve_server_version()
  File "/usr/local/lib/python3.10/dist-packages/docker/api/client.py", line 221, in _retrieve_server_version
    raise DockerException(
docker.errors.DockerException: Error while fetching server API version: Not supported URL scheme http+docker

Packages:

vagrant@node-1:/services$ pip list
Package            Version
------------------ -------------
attrs              21.2.0
Automat            20.2.0
Babel              2.8.0
bcrypt             3.2.0
blinker            1.4
certifi            2020.6.20
cffi               1.16.0
chardet            4.0.0
charset-normalizer 3.3.2
click              8.0.3
cloud-init         24.1.3
colorama           0.4.4
configobj          5.0.6
constantly         15.1.0
cryptography       3.4.8
dbus-python        1.2.18
distro             1.7.0
docker             6.1.3
docker-compose     1.29.2
dockerpty          0.4.1
docopt             0.6.2
httplib2           0.20.2
hyperlink          21.0.0
idna               3.3
importlib-metadata 4.6.4
incremental        21.3.0
jeepney            0.7.1
Jinja2             3.0.3
jsonpatch          1.32
jsonpointer        2.0
jsonschema         3.2.0
keyring            23.5.0
launchpadlib       1.10.16
lazr.restfulclient 0.14.4
lazr.uri           1.0.6
MarkupSafe         2.0.1
more-itertools     8.10.0
netifaces          0.11.0
oauthlib           3.2.0
packaging          24.0
paramiko           3.4.0
pexpect            4.8.0
pip                22.0.2
ptyprocess         0.7.0
pyasn1             0.4.8
pyasn1-modules     0.2.1
pycparser          2.22
PyGObject          3.42.1
PyHamcrest         2.0.2
PyJWT              2.3.0
PyNaCl             1.5.0
pyOpenSSL          21.0.0
pyparsing          2.4.7
pyrsistent         0.18.1
pyserial           3.5
python-apt         2.4.0+ubuntu3
python-dotenv      0.21.1
python-magic       0.4.24
pytz               2022.1
PyYAML             5.4.1
requests           2.31.0
SecretStorage      3.3.1
service-identity   18.1.0
setuptools         59.6.0
six                1.16.0
sos                4.5.6
ssh-import-id      5.11
systemd-python     234
texttable          1.7.0
Twisted            22.1.0
ubuntu-pro-client  8001
ufw                0.36.1
urllib3            1.26.5
wadllib            1.3.6
websocket-client   0.59.0
wheel              0.37.1
zipp               1.0.0
zope.interface     5.4.0

[aaronflorey]

temporary fix it to install requests version 2.31.0 - which fixed it for me. Might need a lower version to fix it for you.

[Korrd]

Having the same issue here!

[gkarumbi]

temporary fix it to install requests version 2.31.0 - which fixed it for me. Might need a lower version to fix it for you.

This worked for me.

[davetapley]

I had the scheme error, but:

    pip_install_packages:
      - name: requests
        version: "2.31.0"

Then caused:

Error connecting: Error while fetching server API version:
request() got an unexpected keyword argument 'chunked'

Presumably:

• https://github.com/docker/docker-py/issues/3113

Not sure why fix isn't there, but downgrading again resolved that issue:

    pip_install_packages:
      - name: requests
        version: "2.29.0"

[github-actions[bot]]

This issue has been marked 'stale' due to lack of recent activity. If there is no further activity, the issue will be closed in another 30 days. Thank you for your contribution!

Please read this blog post to see the reasons why I mark issues as stale.