DockerException: Error while fetching server API version

Could be a bug in 4.4.0 release?

self = <docker.api.client.APIClient object at 0x7f8b52ceec90>

    def _retrieve_server_version(self):
        try:
            return self.version(api_version=False)["ApiVersion"]
        except KeyError:
            raise DockerException(
                'Invalid response from docker daemon: key "ApiVersion"'
                ' is missing.'
            )
        except Exception as e:
            raise DockerException(
>               'Error while fetching server API version: {0}'.format(e)
            )
E           docker.errors.DockerException: Error while fetching server API version: cannot unpack non-iterable CallbackResponse object

/opt/conda/envs/project/lib/python3.7/site-packages/docker/api/client.py:222: DockerException

versions

$ cat /etc/lsb-release 
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=18.04
DISTRIB_CODENAME=bionic
DISTRIB_DESCRIPTION="Ubuntu 18.04.5 LTS"

$ docker --version
Docker version 19.03.14, build 5eb3275d40

$ service docker status
● docker.service - Docker Application Container Engine
   Loaded: loaded (/lib/systemd/system/docker.service; enabled; vendor preset: enabled)
   Active: active (running) since Thu 2020-12-03 16:13:07 PST; 1h 26min ago
     Docs: https://docs.docker.com
 Main PID: 1844 (dockerd)
    Tasks: 10
   CGroup: /system.slice/docker.service
           └─1844 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock

$ python --version
Python 3.7.8

$ poetry --version
Poetry version 1.1.4

$ poetry show docker
name         : docker
version      : 4.4.0
description  : A Python library for the Docker Engine API.

dependencies
 - pywin32 227
 - requests >=2.14.2,<2.18.0 || >2.18.0
 - six >=1.4.0
 - websocket-client >=0.32.0

Can you provide the output from docker version please?
Try to run this to simulate what the server version retrieval method does:

$ curl -s --unix-socket /var/run/docker.sock  http://localhost/version | jq '.ApiVersion'
"1.41"

To avoid this automatic version retrieval, please set the API version to use when you instantiate the docker client.

$ curl -s --unix-socket /var/run/docker.sock  http://localhost/version | jq '.ApiVersion'
"1.40"

$ docker version
Client: Docker Engine - Community
 Version:           19.03.14
 API version:       1.40
 Go version:        go1.13.15
 Git commit:        5eb3275d40
 Built:             Tue Dec  1 19:20:17 2020
 OS/Arch:           linux/amd64
 Experimental:      false

Server: Docker Engine - Community
 Engine:
  Version:          19.03.14
  API version:      1.40 (minimum version 1.12)
  Go version:       go1.13.15
  Git commit:       5eb3275d40
  Built:            Tue Dec  1 19:18:45 2020
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          1.3.9
  GitCommit:        ea765aba0d05254012b0b9e595e995c09186427f
 runc:
  Version:          1.0.0-rc10
  GitCommit:        dc9208a3303feef5b3839f4323d9beb36df0a9dd
 docker-init:
  Version:          0.18.0
  GitCommit:        fec3683

From curl -s --unix-socket /var/run/docker.sock http://localhost/version | jq:

{
  "Platform": {
    "Name": "Docker Engine - Community"
  },
  "Components": [
    {
      "Name": "Engine",
      "Version": "19.03.14",
      "Details": {
        "ApiVersion": "1.40",
        "Arch": "amd64",
        "BuildTime": "2020-12-01T19:18:45.000000000+00:00",
        "Experimental": "false",
        "GitCommit": "5eb3275d40",
        "GoVersion": "go1.13.15",
        "KernelVersion": "4.15.0-126-generic",
        "MinAPIVersion": "1.12",
        "Os": "linux"
      }
    },
    {
      "Name": "containerd",
      "Version": "1.3.9",
      "Details": {
        "GitCommit": "ea765aba0d05254012b0b9e595e995c09186427f"
      }
    },
    {
      "Name": "runc",
      "Version": "1.0.0-rc10",
      "Details": {
        "GitCommit": "dc9208a3303feef5b3839f4323d9beb36df0a9dd"
      }
    },
    {
      "Name": "docker-init",
      "Version": "0.18.0",
      "Details": {
        "GitCommit": "fec3683"
      }
    }
  ],
  "Version": "19.03.14",
  "ApiVersion": "1.40",
  "MinAPIVersion": "1.12",
  "GitCommit": "5eb3275d40",
  "GoVersion": "go1.13.15",
  "Os": "linux",
  "Arch": "amd64",
  "KernelVersion": "4.15.0-126-generic",
  "BuildTime": "2020-12-01T19:18:45.000000000+00:00"
}

Having the same issue:

$ curl -s --unix-socket /var/run/docker.sock  http://localhost/version | jq '.ApiVersion'
"1.41"
$ docker version
Client:
 Cloud integration: 1.0.17
 Version:           20.10.7
 API version:       1.41
 Go version:        go1.16.4
 Git commit:        f0df350
 Built:             Wed Jun  2 11:56:22 2021
 OS/Arch:           darwin/amd64
 Context:           desktop-linux
 Experimental:      true

Server: Docker Engine - Community
 Engine:
  Version:          20.10.7
  API version:      1.41 (minimum version 1.12)
  Go version:       go1.13.15
  Git commit:       b0f5bc3
  Built:            Wed Jun  2 11:54:58 2021
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          1.4.6
  GitCommit:        d71fcd7d8303cbf684402823e425e9dd2e99285d
 runc:
  Version:          1.0.0-rc95
  GitCommit:        b9ee9c6314599f1b4a7f497e1f1f856fe433d3b7
 docker-init:
  Version:          0.19.0
  GitCommit:        de40ad0

$ curl -s --unix-socket /var/run/docker.sock http://localhost/version | jq
{
  "Platform": {
    "Name": "Docker Engine - Community"
  },
  "Components": [
    {
      "Name": "Engine",
      "Version": "20.10.7",
      "Details": {
        "ApiVersion": "1.41",
        "Arch": "amd64",
        "BuildTime": "2021-06-02T11:54:58.000000000+00:00",
        "Experimental": "false",
        "GitCommit": "b0f5bc3",
        "GoVersion": "go1.13.15",
        "KernelVersion": "5.10.25-linuxkit",
        "MinAPIVersion": "1.12",
        "Os": "linux"
      }
    },
    {
      "Name": "containerd",
      "Version": "1.4.6",
      "Details": {
        "GitCommit": "d71fcd7d8303cbf684402823e425e9dd2e99285d"
      }
    },
    {
      "Name": "runc",
      "Version": "1.0.0-rc95",
      "Details": {
        "GitCommit": "b9ee9c6314599f1b4a7f497e1f1f856fe433d3b7"
      }
    },
    {
      "Name": "docker-init",
      "Version": "0.19.0",
      "Details": {
        "GitCommit": "de40ad0"
      }
    }
  ],
  "Version": "20.10.7",
  "ApiVersion": "1.41",
  "MinAPIVersion": "1.12",
  "GitCommit": "b0f5bc3",
  "GoVersion": "go1.13.15",
  "Os": "linux",
  "Arch": "amd64",
  "KernelVersion": "5.10.25-linuxkit",
  "BuildTime": "2021-06-02T11:54:58.000000000+00:00"
}

I'm having the same issue.

I noticed a change in the behavior of docker-py between version 4.2 and 4.3, caused by 727080b

Before this change, the client was created with an API version set to 1.35 by default. After this change, there's no more default, and the client retrieve this version from the docker daemon. So at this points the clients needs to talk to the docker daemon.

In practice, it means that prior to this change, a user that is NOT part of the docker group could still run docker.from_env() successfully. After this change it's not possible anymore. If user doesn't have the permission to talk to the daemon, docker.from_env() throw this exception:

    Error: Error while fetching server API version: ('Connection aborted.', PermissionError(13, 'Permission denied'))

I wonder if it would be possible to get something a bit more precise than a DockerException in that case? I need to handle this case, and right now the only way is to look for `permission denied' in the error message, or something like that. It works, but matching bits of strings in an error message is usually not the right thing to do.

@tillahoffmann

Thanks for these comments (and those in @tillahoffmann's linked issue), they helped my colleague get his local setup working. The trick was to enable this setting:

I have the same problem. Which App/GUI is it that the screenshot shows?

@tillahoffmann

Thanks for these comments (and those in @tillahoffmann's linked issue), they helped my colleague get his local setup working. The trick was to enable this setting:

I had the same problem and had to activate the "Allow privileged port mapping" option in the advanced settings.

Not using Docker Desktop anyone has a fix so far?

Not using Docker Desktop anyone has a fix so far?

Hi! For me upgrading requests library was a fix

Not using Docker Desktop anyone has a fix so far?

Hi! For me upgrading requests library was a fix

Oh wow! Updating the requests lib on the target did it for me as well.

Thanks mate

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