Error while building snap in docker container

snapcraft
1

The below error happens specifically while running the snapcraft command to build a python snap inside a docker container as part of bitbucket pipeline, but works perfectly fine locally.

The dockerfile I used to build the image is from here

Any hints on what could be going on here is appreciated.

        Sorry, an error occurred in Snapcraft:
('Connection aborted.', FileNotFoundError(2, 'No such file or directory'))
Traceback (most recent call last):
  File "/snap/snapcraft/current/lib/python3.6/site-packages/urllib3/connectionpool.py", line 600, in urlopen
    chunked=chunked)
  File "/snap/snapcraft/current/lib/python3.6/site-packages/urllib3/connectionpool.py", line 354, in _make_request
    conn.request(method, url, **httplib_request_kw)
  File "/snap/snapcraft/current/usr/lib/python3.6/http/client.py", line 1264, in request
    self._send_request(method, url, body, headers, encode_chunked)
  File "/snap/snapcraft/current/usr/lib/python3.6/http/client.py", line 1310, in _send_request
    self.endheaders(body, encode_chunked=encode_chunked)
  File "/snap/snapcraft/current/usr/lib/python3.6/http/client.py", line 1259, in endheaders
    self._send_output(message_body, encode_chunked=encode_chunked)
  File "/snap/snapcraft/current/usr/lib/python3.6/http/client.py", line 1038, in _send_output
    self.send(msg)
  File "/snap/snapcraft/current/usr/lib/python3.6/http/client.py", line 976, in send
    self.connect()
  File "/snap/snapcraft/current/lib/python3.6/site-packages/requests_unixsocket/adapters.py", line 32, in connect
    sock.connect(socket_path)
FileNotFoundError: [Errno 2] No such file or directory
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
  File "/snap/snapcraft/current/lib/python3.6/site-packages/requests/adapters.py", line 449, in send
    timeout=timeout
  File "/snap/snapcraft/current/lib/python3.6/site-packages/urllib3/connectionpool.py", line 638, in urlopen
    _stacktrace=sys.exc_info()[2])
  File "/snap/snapcraft/current/lib/python3.6/site-packages/urllib3/util/retry.py", line 368, in increment
    raise six.reraise(type(error), error, _stacktrace)
  File "/snap/snapcraft/current/lib/python3.6/site-packages/urllib3/packages/six.py", line 685, in reraise
    raise value.with_traceback(tb)
  File "/snap/snapcraft/current/lib/python3.6/site-packages/urllib3/connectionpool.py", line 600, in urlopen
    chunked=chunked)
  File "/snap/snapcraft/current/lib/python3.6/site-packages/urllib3/connectionpool.py", line 354, in _make_request
    conn.request(method, url, **httplib_request_kw)
  File "/snap/snapcraft/current/usr/lib/python3.6/http/client.py", line 1264, in request
    self._send_request(method, url, body, headers, encode_chunked)
  File "/snap/snapcraft/current/usr/lib/python3.6/http/client.py", line 1310, in _send_request
    self.endheaders(body, encode_chunked=encode_chunked)
  File "/snap/snapcraft/current/usr/lib/python3.6/http/client.py", line 1259, in endheaders
    self._send_output(message_body, encode_chunked=encode_chunked)
  File "/snap/snapcraft/current/usr/lib/python3.6/http/client.py", line 1038, in _send_output
    self.send(msg)
  File "/snap/snapcraft/current/usr/lib/python3.6/http/client.py", line 976, in send
    self.connect()
  File "/snap/snapcraft/current/lib/python3.6/site-packages/requests_unixsocket/adapters.py", line 32, in connect
    sock.connect(socket_path)
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 "/snap/snapcraft/current/bin/snapcraft", line 33, in <module>
    sys.exit(load_entry_point('snapcraft==4.3', 'console_scripts', 'snapcraft')())
  File "/snap/snapcraft/current/lib/python3.6/site-packages/click/core.py", line 829, in __call__
    return self.main(*args, **kwargs)
  File "/snap/snapcraft/current/lib/python3.6/site-packages/click/core.py", line 782, in main
    rv = self.invoke(ctx)
  File "/snap/snapcraft/current/lib/python3.6/site-packages/click/core.py", line 1236, in invoke
    return Command.invoke(self, ctx)
  File "/snap/snapcraft/current/lib/python3.6/site-packages/click/core.py", line 1066, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/snap/snapcraft/current/lib/python3.6/site-packages/click/core.py", line 610, in invoke
    return callback(*args, **kwargs)
  File "/snap/snapcraft/current/lib/python3.6/site-packages/click/decorators.py", line 21, in new_func
    return f(get_current_context(), *args, **kwargs)
  File "/snap/snapcraft/current/lib/python3.6/site-packages/snapcraft/cli/_runner.py", line 132, in run
    snap_command.invoke(ctx)
  File "/snap/snapcraft/current/lib/python3.6/site-packages/snapcraft/cli/_command.py", line 88, in invoke
    return super().invoke(ctx)
  File "/snap/snapcraft/current/lib/python3.6/site-packages/click/core.py", line 1066, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/snap/snapcraft/current/lib/python3.6/site-packages/click/core.py", line 610, in invoke
    return callback(*args, **kwargs)
  File "/snap/snapcraft/current/lib/python3.6/site-packages/snapcraft/cli/lifecycle.py", line 354, in snap
    _execute(steps.PRIME, parts=tuple(), pack_project=True, output=output, **kwargs)
  File "/snap/snapcraft/current/lib/python3.6/site-packages/snapcraft/cli/lifecycle.py", line 92, in _execute
    lifecycle.execute(step, project_config, parts)
  File "/snap/snapcraft/current/lib/python3.6/site-packages/snapcraft/internal/lifecycle/_runner.py", line 115, in execute
    project_config.get_build_snaps(), project_config.project._get_content_snaps()
  File "/snap/snapcraft/current/lib/python3.6/site-packages/snapcraft/internal/lifecycle/_runner.py", line 75, in _install_build_snaps
    installed_snaps = repo.snaps.install_snaps(build_snaps)
  File "/snap/snapcraft/current/lib/python3.6/site-packages/snapcraft/internal/repo/snaps.py", line 301, in install_snaps
    snap_pkg_channel = snap_pkg.get_store_snap_info()["channel"]
  File "/snap/snapcraft/current/lib/python3.6/site-packages/snapcraft/internal/repo/snaps.py", line 117, in get_store_snap_info
    self._store_snap_info = _get_store_snap_info(self.name)
  File "/snap/snapcraft/current/lib/python3.6/site-packages/snapcraft/internal/repo/snaps.py", line 393, in _get_store_snap_info
    snap_info = requests_unixsocket.get(url)
  File "/snap/snapcraft/current/lib/python3.6/site-packages/requests_unixsocket/__init__.py", line 51, in get
    return request('get', url, **kwargs)
  File "/snap/snapcraft/current/lib/python3.6/site-packages/requests_unixsocket/__init__.py", line 46, in request
    return session.request(method=method, url=url, **kwargs)
  File "/snap/snapcraft/current/lib/python3.6/site-packages/requests/sessions.py", line 524, in request
    resp = self.send(prep, **send_kwargs)
  File "/snap/snapcraft/current/lib/python3.6/site-packages/requests/sessions.py", line 637, in send
    r = adapter.send(request, **kwargs)
  File "/snap/snapcraft/current/lib/python3.6/site-packages/requests/adapters.py", line 498, in send
    raise ConnectionError(err, request=request)
requests.exceptions.ConnectionError: ('Connection aborted.', FileNotFoundError(2, 'No such file or directory'))
2

From the error, it looks like your project needs to install or download some snaps as part of the build. There is no snapd running in docker, so it fails.

3

If you are able to start the container with --privileged you could try diddledan/snapcraft:core, diddledan/snapcraft:core18 or diddledan/snapcraft:core20, which loads a full systemd and snapd inside the container. However, it will fail if you cannot specify --privileged permission when the container is created.

A command line invocation would be similar to:

docker run --rm --tty --privileged -v $PWD:/data -w /data diddledan/snapcraft:core18
1 Like
4

Alternatively, have you tried installing snapcraft from homebrew?

Snaps do not easily work inside a docker container, it is possible, just requires extra tweaking.

5

I’ve found an incompatibility with running my Docker container on top of a Snapd-enabled host if apparmor is enabled. The rules for /usr/lib/snapd/snap-confine.real prevent the Docker-contained snap-confine.real from executing snaps, like snapcraft. A workaround that isn’t very nice because it breaks snap execution on the host until reverted is to disable the /etc/apparmor.d/usr.lib.snapd.snap-confine.real profile on the host temporarily.

6

@Thomas69 Thanks for the suggestion. The docker build works fine locally on my mac but the same image throws up the above error when run as part of bitbucket pipeline.

@lucyllewy will try your solution (apparmor tweak) and update. Unfortunately bitbucket do not allow previleged mode. Refer https://support.atlassian.com/bitbucket-cloud/docs/run-docker-commands-in-bitbucket-pipelines/

1 Like
8

I have the same problem. Is anyone able to build snap in the bitbucket pipeline?

9

Did you manage to find a solution?