This patch adds some checks on the path that is accessed as a container,
making sure it looks like one. It implements the connection method and
add adaptations to the modern way of writing connections for Ansible.
It also rewords docs and vars to use the nspawn terminology instead of
chroot.
This commit adds a connection driver built on top of systemd-nspawn.
This is similar to the existing `chroot` driver, except that nspawn
offers a variety of additional services. For example, it takes care of
automatically mounting `/proc` and `/sys` inside the chroot environment,
which will make a variety of tools work correctly that would otherwise
fail.
You can take advantage of other system-nspawn features to perform more
complicated tasks. For example, on my x86_64 system I have a Raspberry
Pi disk image mounted on `/rpi`. I can't use `chroot` with this because
the binaries contained in the image are for the wrong architecture.
However, I can use the systemd-nspawn `--bind` option to automatically
insert the appropriate qemu-arm binary into the container using an
inventory file like this:
pi ansible_host=/rpi ansible_nspawn_extra_args='--bind /usr/bin/qemu-arm --bind /lib64'
See http://www.freedesktop.org/software/systemd/man/systemd-nspawn.html
for more information about systemd-nspawn itself.
