Re: [libvirt-users] creating a lxc image to be used with libvirt-lxc
On Mon, Apr 03, 2017 at 05:52:33PM +0000, Spike wrote:
Dear all,
I'm moving my first baby steps with libvirt-lxc trying to convert over from
an LXD installation and one of the hurdles is putting together an image.
All the examples I found about libvirt-lxc refer to running /bin/sh in a
container, almost as if it was docker, as opposed to run a "full system"
like I've been doing with lxd. Also virt-install, often referred in libvirt
docs, seems to be specific/only for kvm.
Can anybody point me to any documentation to achieve the same as you'd do
with lxd? would it even just work to use those images (
https://cloud-images.ubuntu.com/) with libvirt? Last but not least, is
there any way to "publish" a modified image so that I could make changes to
any of the above and then reuse the modified one as a base for other
containers?
Libvirt LXC doesn't really care what you run inside the containedr - it is
possible to use it to run a single application (docker style), or to run a
full operating system. You essentially just need to populate a chroot with
the operating system install you want to run.
I've previously tested with a Fedora chroot:
https://www.berrange.com/posts/2013/08/12/running-a-full-fedora-os-inside...
If you want to have layered modifications, then the best bet is probably
to make use of overlayfs with your chroots. ie populate a base chroot
and treat it as read-only thereafter. Then create a new directory mounted
with overlayfs to add a writable layer on top.
Regards,
Daniel
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