download: Initial template This adds a new template called "download". It's a fairly simple template with a minimal set of dependency which will grab any pre-built image available on https://images.linuxcontainers.org Note that the serverside is still work in progress (missing SSL support). Access is done over https by default with a warning being emitted if fallback to http was required (may be needed for testing, when behind proxy and with private servers). All index files and tarballs are gpg-signed with the default pubkeyid contained in the template itself. The main benefit of this template is to be entirely distribution-agnostic, any template that can be integrated with the server build infrastructure will then work on any LXC machine when using the download template. This template is also compatible with user namespaces and will hopefully help widden the number of distros that may work in unprivileged LXC. This commit also bundles a small change to the template configs to have the ubuntu template (used by the download template) to work with unprivileged LXC. Signed-off-by: Stéphane Graber <stgraber@ubuntu.com> Acked-by: Serge E. Hallyn <serge.hallyn@ubuntu.com>

Move some common Ubuntu config This introduces a new /usr/share/lxc/config directory containing common configuration snippets. The two Ubuntu templates are then simplified to just include the relevant entries avoiding a whole lot of hardcoded cgroup, capabilities and mount points configuration. An extra comment is also added at the top of all generated configuration files telling the user to look at lxc.conf(5) for more information. Signed-off-by: Stéphane Graber <stgraber@ubuntu.com> Acked-by: Serge E. Hallyn <serge.hallyn@ubuntu.com>