if ftp_proxy/http_proxy/https_proxy standard environment variables available,
pass them to the docker daemon to build images.
this is required when building behind corporate proxy/firewall, but also help
when using local cache server (ie: apt/yum).
Signed-off-by: NPhilippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20170306205520.32311-1-f4bug@amsat.org>
Reviewed-by: NFam Zheng <famz@redhat.com>
Signed-off-by: NFam Zheng <famz@redhat.com>

Currently all docker builds are done by exporting a tarball to the
docker container and running the build as the containers root user.
Other use cases are possible however and it is possible to map a part
of users file-system to the container. This is useful for example for
doing cross-builds of arbitrary source trees. For this to work
smoothly the container needs to have a user created that maps cleanly
to the host system.

This adds a -u option to the docker script so that:

  DEB_ARCH=armhf DEB_TYPE=stable ./tests/docker/docker.py build \
    -u --include-executable=arm-linux-user/qemu-arm \
    debian:armhf ./tests/docker/dockerfiles/debian-bootstrap.docker

Will build a container that can then be run like:

  docker run --rm -it -v /home/alex/lsrc/qemu/risu.git/:/src \
    --user=alex:alex -w /src/ debian:armhf \
    sh -c "make clean && ./configure -s && make"

All docker containers built will add the current user unless
explicitly disabled by specifying NOUSER when invoking the Makefile:

  make docker-image-debian-armhf-cross NOUSER=1
Signed-off-by: NAlex Bennée <alex.bennee@linaro.org>
Reviewed-by: NFam Zheng <famz@redhat.com>
Tested-by: NPhilippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: NPhilippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20170220105139.21581-2-alex.bennee@linaro.org>
Signed-off-by: NFam Zheng <famz@redhat.com>

Signed-off-by: NFam Zheng <famz@redhat.com>
Message-Id: <1474429768-25027-9-git-send-email-famz@redhat.com>
Reviewed-by: NDaniel P. Berrange <berrange@redhat.com>

When trying to run docker tests on a host without the docker
command,  we get the following Python backtrace:

  $ make docker-test-quick@centos6 V=1
  .../qemu/tests/docker/docker.py build qemu:centos6 .../qemu/tests/docker/dockerfiles/centos6.docker
  Traceback (most recent call last):
    File ".../qemu/tests/docker/docker.py", line 339, in <module>
      sys.exit(main())
    File ".../qemu/tests/docker/docker.py", line 336, in main
      return args.cmdobj.run(args, argv)
    File ".../qemu/tests/docker/docker.py", line 231, in run
      dkr = Docker()
    File ".../qemu/tests/docker/docker.py", line 98, in __init__
      self._command = _guess_docker_command()
    File ".../qemu/tests/docker/docker.py", line 41, in _guess_docker_command
      stdout=DEVNULL, stderr=DEVNULL) == 0:
    File "/usr/lib64/python2.7/subprocess.py", line 523, in call
      return Popen(*popenargs, **kwargs).wait()
    File "/usr/lib64/python2.7/subprocess.py", line 711, in __init__
      errread, errwrite)
    File "/usr/lib64/python2.7/subprocess.py", line 1343, in _execute_child
      raise child_exception
  OSError: [Errno 2] No such file or directory
  .../qemu/tests/docker/Makefile.include:47: recipe for target 'docker-image-centos6' failed
  make: *** [docker-image-centos6] Error 1

Change _guess_docker_command() to handle OSError exceptions
raised by subprocess.call(), so we will keep looking for other
commands and print a better error message.

New output will be:

  $ make docker-test-quick@centos6 V=1
  .../qemu/tests/docker/docker.py build qemu:centos6 .../qemu/tests/docker/dockerfiles/centos6.docker
  Traceback (most recent call last):
    File ".../qemu/tests/docker/docker.py", line 343, in <module>
      sys.exit(main())
    File ".../qemu/tests/docker/docker.py", line 340, in main
      return args.cmdobj.run(args, argv)
    File ".../qemu/tests/docker/docker.py", line 235, in run
      dkr = Docker()
    File ".../qemu/tests/docker/docker.py", line 102, in __init__
      self._command = _guess_docker_command()
    File ".../qemu/tests/docker/docker.py", line 49, in _guess_docker_command
      commands_txt)
  Exception: Cannot find working docker command. Tried:
    docker
    sudo -n docker
  .../qemu/tests/docker/Makefile.include:47: recipe for target 'docker-image-centos6' failed
  make: *** [docker-image-centos6] Error 1
Signed-off-by: NEduardo Habkost <ehabkost@redhat.com>
Message-Id: <1474369559-16903-1-git-send-email-ehabkost@redhat.com>
[exceptions.OSError -> OSError and drop the import. - Fam]
Signed-off-by: NFam Zheng <famz@redhat.com>

If we silence docker when --quiet is given, we should also silence the
.pre script (i.e. debootstrap).

Only discards stdout, so some diagnostics (e.g. from git clone) are
still printed. Most of the verbose output is gone however and this way
we still have a chance to see error messages.
Signed-off-by: NSascha Silbe <silbe@linux.vnet.ibm.com>
Message-Id: <1473192351-601-9-git-send-email-silbe@linux.vnet.ibm.com>
Signed-off-by: NFam Zheng <famz@redhat.com>

Unlike Popen.communicate(), subprocess.call() doesn't read from the
stdout file descriptor. If the child process produces more output than
fits into the pipe buffer, it will block indefinitely.

If we don't intend to consume the output, just send it straight to
/dev/null to avoid this issue.
Signed-off-by: NSascha Silbe <silbe@linux.vnet.ibm.com>
Reviewed-by: NJanosch Frank <frankja@linux.vnet.ibm.com>
Message-Id: <1473192351-601-2-git-send-email-silbe@linux.vnet.ibm.com>
Signed-off-by: NFam Zheng <famz@redhat.com>

This is a wrapper for the 'docker images' command.
Signed-off-by: NFam Zheng <famz@redhat.com>
Reviewed-by: NAlex Bennée <alex.bennee@linaro.org>
Message-id: 1468934445-32183-9-git-send-email-famz@redhat.com

This adds a new operation to the docker script to allow updating of
binaries in an existing container. This is because it would be
inefficient to re-build the whole container just for an update to the
QEMU binary.

To update the executable run:

    ./tests/docker/docker.py update \
        debian:armhf ./arm-linux-user/qemu-arm
Signed-off-by: NAlex Bennée <alex.bennee@linaro.org>
Message-id: 1468934445-32183-6-git-send-email-famz@redhat.com
Signed-off-by: NFam Zheng <famz@redhat.com>

The docker script will now search for an associated $dockerfile.pre
script which gets run in the same build context as the dockerfile will
be. This is to support pre-seeding the build context before running the
docker build.
Signed-off-by: NAlex Bennée <alex.bennee@linaro.org>
Message-id: 1468934445-32183-4-git-send-email-famz@redhat.com
Signed-off-by: NFam Zheng <famz@redhat.com>

When passed the path to a binary we copy it and any linked libraries (if
it is dynamically linked) into the docker build context. These can then
be included by a dockerfile with the line:

  # Copy all of context into container
  ADD . /

This is mainly intended for setting up foreign architecture docker
images which use qemu-$arch to do cross-architecture linux-user
execution. It also relies on the host and guest file-system following
reasonable multi-arch layouts so the copied libraries don't clash with
the guest ones.
Signed-off-by: NAlex Bennée <alex.bennee@linaro.org>
Message-id: 1468934445-32183-3-git-send-email-famz@redhat.com
Signed-off-by: NFam Zheng <famz@redhat.com>

Instead of letting the build_image create the temporary working dir we
move the creation to the build command. This is preparation for the
later patches where additional files can be added to the build context
before the build step is run.

We also ensure we remove the build context after we are done (mkdtemp
doesn't do this automatically for you).
Signed-off-by: NAlex Bennée <alex.bennee@linaro.org>
Reviewed-by: NFam Zheng <famz@redhat.com>
Message-id: 1468934445-32183-2-git-send-email-famz@redhat.com
Signed-off-by: NFam Zheng <famz@redhat.com>

docker.py is added with a number of useful subcommands to manager docker
images and instances for QEMU docker testing. Subcommands are:

run: A wrapper of "docker run" (or "sudo -n docker run" if necessary),
which takes care of killing and removing the running container at
SIGINT.

clean: Tear down all the containers including inactive ones that are
started by docker_run.

build: Compare an image from given dockerfile and rebuild it if they're
different.
Signed-off-by: NFam Zheng <famz@redhat.com>
Message-id: 1464755128-32490-2-git-send-email-famz@redhat.com