Dockerfile - Cryptography build fails without libffi-dev package

Cryptography build fails without libffi-dev package.

Partial error output for docker build -t jsnapy .

   x86_64-linux-gnu-gcc -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-Bsymbolic-functions -Wl,-z,relro -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -D_FORTIFY_SOURCE=2 -g -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security build/temp.linux-x86_64-2.7/src/lxml/lxml.objectify.o -lxslt -lexslt -lxml2 -lz -lm -o build/lib.linux-x86_64-2.7/lxml/objectify.so

  Running setup.py install for cryptography
    c/_cffi_backend.c:15:17: fatal error: ffi.h: No such file or directory
     #include <ffi.h>
                     ^
    compilation terminated.
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/tmp/pip_build_root/cryptography/setup.py", line 333, in <module>
        **keywords_with_side_effects(sys.argv)
      File "/usr/lib/python2.7/distutils/core.py", line 111, in setup
        _setup_distribution = dist = klass(attrs)
      File "/usr/lib/python2.7/dist-packages/setuptools/dist.py", line 239, in __init__
        self.fetch_build_eggs(attrs.pop('setup_requires'))
      File "/usr/lib/python2.7/dist-packages/setuptools/dist.py", line 264, in fetch_build_eggs
        replace_conflicting=True
      File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 620, in resolve
        dist = best[req.key] = env.best_match(req, ws, installer)
      File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 858, in best_match
        return self.obtain(req, installer) # try and download/install
      File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 870, in obtain
        return installer(requirement)
      File "/usr/lib/python2.7/dist-packages/setuptools/dist.py", line 314, in fetch_build_egg
        return cmd.easy_install(req)
      File "/usr/lib/python2.7/dist-packages/setuptools/command/easy_install.py", line 616, in easy_install
        return self.install_item(spec, dist.location, tmpdir, deps)
      File "/usr/lib/python2.7/dist-packages/setuptools/command/easy_install.py", line 646, in install_item
        dists = self.install_eggs(spec, download, tmpdir)
      File "/usr/lib/python2.7/dist-packages/setuptools/command/easy_install.py", line 834, in install_eggs
        return self.build_and_install(setup_script, setup_base)
      File "/usr/lib/python2.7/dist-packages/setuptools/command/easy_install.py", line 1040, in build_and_install
        self.run_setup(setup_script, setup_base, args)
      File "/usr/lib/python2.7/dist-packages/setuptools/command/easy_install.py", line 1028, in run_setup
        raise DistutilsError("Setup script exited with %s" % (v.args[0],))
    distutils.errors.DistutilsError: Setup script exited with error: command 'x86_64-linux-gnu-gcc' failed with exit status 1
    Complete output from command /usr/bin/python -c "import setuptools, tokenize;__file__='/tmp/pip_build_root/cryptography/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-EzxxXN-record/install-record.txt --single-version-externally-managed --compile:
    c/_cffi_backend.c:15:17: fatal error: ffi.h: No such file or directory

 #include <ffi.h>

                 ^

compilation terminated.

Traceback (most recent call last):

  File "<string>", line 1, in <module>

  File "/tmp/pip_build_root/cryptography/setup.py", line 333, in <module>

    **keywords_with_side_effects(sys.argv)

  File "/usr/lib/python2.7/distutils/core.py", line 111, in setup

    _setup_distribution = dist = klass(attrs)

  File "/usr/lib/python2.7/dist-packages/setuptools/dist.py", line 239, in __init__

    self.fetch_build_eggs(attrs.pop('setup_requires'))

  File "/usr/lib/python2.7/dist-packages/setuptools/dist.py", line 264, in fetch_build_eggs

    replace_conflicting=True

  File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 620, in resolve

    dist = best[req.key] = env.best_match(req, ws, installer)

  File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 858, in best_match

    return self.obtain(req, installer) # try and download/install

  File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 870, in obtain

    return installer(requirement)

  File "/usr/lib/python2.7/dist-packages/setuptools/dist.py", line 314, in fetch_build_egg

    return cmd.easy_install(req)

  File "/usr/lib/python2.7/dist-packages/setuptools/command/easy_install.py", line 616, in easy_install

    return self.install_item(spec, dist.location, tmpdir, deps)

  File "/usr/lib/python2.7/dist-packages/setuptools/command/easy_install.py", line 646, in install_item

    dists = self.install_eggs(spec, download, tmpdir)

  File "/usr/lib/python2.7/dist-packages/setuptools/command/easy_install.py", line 834, in install_eggs

    return self.build_and_install(setup_script, setup_base)

  File "/usr/lib/python2.7/dist-packages/setuptools/command/easy_install.py", line 1040, in build_and_install

    self.run_setup(setup_script, setup_base, args)

  File "/usr/lib/python2.7/dist-packages/setuptools/command/easy_install.py", line 1028, in run_setup

    raise DistutilsError("Setup script exited with %s" % (v.args[0],))

distutils.errors.DistutilsError: Setup script exited with error: command 'x86_64-linux-gnu-gcc' failed with exit status 1

----------------------------------------
Cleaning up...
Command /usr/bin/python -c "import setuptools, tokenize;__file__='/tmp/pip_build_root/cryptography/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-EzxxXN-record/install-record.txt --single-version-externally-managed --compile failed with error code 1 in /tmp/pip_build_root/cryptography
Storing debug log for failure in /root/.pip/pip.log
The command '/bin/sh -c pip install ncclient' returned a non-zero code: 1
root@ubuntu-1gb-nyc1-01:~/jsnapy#

[dgarros]

+1 to that I think the creator of the initial docker File didn’t knew about @ntwrkguru’s Dockerfile

[jeffbrl]

@ntwrkguru’s Dockerfile for a pyez image produces a much leaner image by using alpine linux as the base and deleting the build tools. The size for his is 79 MB (c.f., almost 500 MB for jsnapy). Unless there is a specific driver for ubuntu, we could use his image as the base and add the jsnapy layer on top of it. If we don’t want the dependency, we could restructure this project’s Dockerfile to produce an image similar to his. Any opinions on this?