ImportError: No module named backports.ssl_match_hostname

[Chris West]

When using upstream docker (i.e. docker-ce from download.docker.com, not docker 1.5 from Ubuntu), docker-compose dies with this ImportError. Looks like it was fixed upstream in March. Maybe docker-compose could be updated to a version that works with both in-box docker and upstream docker?

Upstream complaints:
 * https://github.com/docker/docker-py/issues/1502
 * https://stackoverflow.com/questions/43147387/docker-compose-gives-error-importerror-no-module-named-ssl-match-hostname-whe

I realise that you probably don't support having upstream docker installed, but it's probably the overwhelmingly common case.

Error:
Traceback (most recent call last):
  File "/usr/bin/docker-compose", line 11, in <module>
    load_entry_point('docker-compose==1.8.0', 'console_scripts', 'docker-compose')()
  File "/usr/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 564, in load_entry_point
    return get_distribution(dist).load_entry_point(group, name)
  File "/usr/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 2662, in load_entry_point
    return ep.load()
  File "/usr/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 2316, in load
    return self.resolve()
  File "/usr/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 2322, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "/usr/lib/python2.7/dist-packages/compose/cli/main.py", line 14, in <module>
    from . import errors
  File "/usr/lib/python2.7/dist-packages/compose/cli/errors.py", line 9, in <module>
    from docker.errors import APIError
  File "/usr/lib/python2.7/dist-packages/docker/__init__.py", line 20, in <module>
    from .client import Client, AutoVersionClient, from_env # flake8: noqa
  File "/usr/lib/python2.7/dist-packages/docker/client.py", line 24, in <module>
    from . import api
  File "/usr/lib/python2.7/dist-packages/docker/api/__init__.py", line 2, in <module>
    from .build import BuildApiMixin
  File "/usr/lib/python2.7/dist-packages/docker/api/build.py", line 9, in <module>
    from .. import utils
  File "/usr/lib/python2.7/dist-packages/docker/utils/__init__.py", line 1, in <module>
    from .utils import (
  File "/usr/lib/python2.7/dist-packages/docker/utils/utils.py", line 33, in <module>
    from .. import tls
  File "/usr/lib/python2.7/dist-packages/docker/tls.py", line 5, in <module>
    from .ssladapter import ssladapter
  File "/usr/lib/python2.7/dist-packages/docker/ssladapter/__init__.py", line 1, in <module>
    from .ssladapter import SSLAdapter # flake8: noqa
  File "/usr/lib/python2.7/dist-packages/docker/ssladapter/ssladapter.py", line 21, in <module>
    from backports.ssl_match_hostname import match_hostname
ImportError: No module named backports.ssl_match_hostname

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: docker-compose 1.8.0-2
ProcVersionSignature: Ubuntu 4.13.0-25.29-generic 4.13.13
Uname: Linux 4.13.0-25-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.7-0ubuntu3.7
Architecture: amd64
Date: Sun Jan 14 14:53:20 2018
PackageArchitecture: all
SourcePackage: docker-compose
UpgradeStatus: Upgraded to artful on 2017-09-12 (124 days ago)

[Jason Pleau (jasonpleau)]

Hi.

We investigated a similar issue in Debian [1]

Make sure you have this package installed:

https://packages.ubuntu.com/artful/python-backports.ssl-match-hostname

If you still get the error:

A temporary fix is to create an empty file called __init__.py in /usr/lib/python2.7/dist-packages/backports

Full filename: /usr/lib/python2.7/dist-packages/backports/__init__.py

1: see: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=893520

[Jeremy Bícha (jbicha)]

This bug was fixed in the package docker-compose - 1.21.0-3

---------------
docker-compose (1.21.0-3) unstable; urgency=medium

  * Add dependency on python3-distutils.
    While part of stdlib, it is split in the Debian packaging.

 -- Felipe Sateler <email address hidden> Wed, 03 Oct 2018 14:55:03 -0300

docker-compose (1.21.0-2) unstable; urgency=medium

  [ Jason Pleau ]
  * Update Vcs-* fields to point to docker-compose-team group

  [ Felipe Sateler ]
  * Set team email as maintainer
  * Switch to using python3 instead of python2.
    Also removes the need for the ssl-match-hostname backport.
    (Closes: #909974)
  * Upload to unstable

 -- Felipe Sateler <email address hidden> Tue, 02 Oct 2018 16:49:34 -0300

docker-compose (1.21.0-1) experimental; urgency=medium

  [ Jason Pleau ]
  * New upstream release
  * Refresh patches
  * Bump Build-Dependencies
  * Add myself to Uploaders
  * Bump Standards-Version to 4.1.4
  * refresh Relax-dependencies.patch
  * Bump python-docker B-D to 3.2.1
  * add docker_compose.egg-info/* to debian/clean

 -- Felipe Sateler <email address hidden> Tue, 17 Apr 2018 20:02:23 -0300