Build libguestfs inside a systemd-nspawn container
==================================================

Prerequisite
------------

Because of an audit subsystem incompatibility bug - rhbz#966807[1], turn
off auditing by booting the host w/ 'audit=0' on Kernel command line.
[NOTE: There's work in progress[2] in upstream Kernel to fix this.]


Create container 
----------------

On the host, specify an installroot (/srv) and install a minimal Fedora
20 distribution:

    $ yum -y --releasever=20 --nogpg \
        --installroot=/srv/testcontainer \
        --disablerepo='*' --enablerepo=fedora \
        install systemd passwd yum \
        fedora-release vim-minimal

Boot into the container, set the password:

    $ systemd-nspawn -D /srv/testcontainer
    [. . .]
    -bash-4.2# passwd

Start the container w/ systemd:

    $ systemd-nspawn -bD /srv/testcontainer
    [. . .]
    -bash-4.2#


Building Libguestfs
-------------------

Inside the minimal Fedora 20 container, install libguestfs dependencies,
clone the libguestfs git repository:

    -bash-4.2# yum-builddep libguestfs -y

    -bash-4.2# git clone git://github.com/libguestfs/libguestfs.git

Build and test libguestfs in the container:

    -bash-4.2# cd libguestfs

    -bash-4.2# ./autogen.sh && time make 2>&1 \
                | tee /tmp/libguestfs-compile.log

     -bash-4.2# time make -k check \
     LIBGUESTFS_DEBUG=1 LIBGUESTFS_TRACE=1 2>&1 \
     | tee /tmp/libguestfs-test.log


Notes
-----

Some related details:

- If you need to build a container without networking (once all the
  relevant dependencies are cloned), you can invoke the container with
  no network devices:

    $ systemd-nspawn -bD /srv/testcontainer --private-network
    [. . .]
    -bash-4.2# 

- `gdb` and `strace` can be used from the host to the programs running
  in the container.


[1] https://bugzilla.redhat.com/show_bug.cgi?id=966807
[2] https://www.redhat.com/archives/linux-audit/2013-May/msg00065.html