Hosts without support for lxc-attach are ancien and can always use old
versions of vagrant-lxc. To be able to move forward more easily, we
should be able to assume a functional `lxc-attach`.
As for `/sbin/halt`, I'm really not sure it's needed anymore. Let's see
if its removal causes problems.
We now depend on vagrant 1.9+ and LXC 2.0+, following bundled version in
debian stretch.
Also, update Gemfile to target latest vagrant/vagrant-spec. It's too
complicated to test against old vagrant versions. Vagrant 1.8.x didn't
specify an upper bound for supported versions but vagrant 1.9 does
(<2.4). This breaks out CI testing matrix which tests against 2.3, 2.4
and 2.5.
So let's make our live easier and just test against the latest vagrant
version and try not to mistakenly drop support for our lowest supported
vagrant version...
Creating a new vagrant machine with a box created with an old LXC config
format would fail with LXC 3.0. We now update the LXC config of the box
itself before calling `lxc-create`.
LXC 3.0, unlike 2.1, doesn't support old configuration formats at all
and because our previous approach to handling old format was incomplete,
running `vagrant up` on a system with LXC 3.0 would fail, even if the
base box itself was made with modernized config.
This commit fixes this problem: is the box has a modern config, it's
going to be properly created and booted under LXC 3.0. It does so
without breaking the support for LXC < 2.1
Since redir 2.x upstream is not evolving it, Joachim Nilsson adopted it
and have started to work on it and publish a new command line interface
(check out https://github.com/troglobit/redir). The redir 3.1 is already
available in Debian and Ubuntu in their stable releases.
To fix#406, I reverted the tmpfs mount we add at boot time. As we can
see in #455, it was a bad idea.
In addition to bringing back that mount, I've also added a
`tmpfs_mount_size` config that allows to change the size of the mount
from its default `2G`. It's also possible to disable the mount
altogether.
fixes#455
fixes#406 because the `tmpfs` mount isn't needed anymore.
Careful considerations had to be taken because #68 mentions host-side
data loss when cleaning up `/tmp`. We mitigate this by ensuring that all
mounts under `/tmp` are unmounted before we proceed with our `rm -rf`
operation.
More context about this issue can be found in #360.
When running with LXC 2.1+, ensure that our boxes have up-to-date config
keys by running the `lxc-update-config` utility that ships with LXC
2.1+.
When the command doesn't exist (LXC <2.1), we do nothing.
ref #445
`lxc-info -iH` to retrieve IP address was not available in early LXC
development but was there at LXC 1.0. Because we've bumped our minimum
LXC requirement to v1.0 recently, we can simplify the IP retrieval
process and also get rid of the `dnsmasq` fallback.
