[lxc-users] how do you create an image from scratch?

[Spike]

thank you Fajar and T.C.,

your experience is very precious and the lxc template looks very good as a
source of inspiration. I'll try commenting out everything in fstab and see
what happens. Other pages I found like this one
https://snikt.net/blog/2014/03/22/convert-kvm-image-to-lxc-container/ suggested
other steps as the creation of devices manually as udev is not supported in
the container. I guess coming from KVM that will be taken care of, however
I'm wondering if things like system-udevd needs to be adjusted for example.
Maybe the lxc template will clarify that.

thanks,

Spike

On Wed, Apr 26, 2017 at 8:01 AM Fajar A. Nugraha <list at fajar.net> wrote:

> On Wed, Apr 26, 2017 at 9:40 PM, Spike <spike at drba.org> wrote:
>
>> yeah I've seen that link before and used the lxd image publish / export
>> approach (it's what I'm doing right now in fact). However that post isn't
>> very clear on what it takes to start from scratch. There is a section on
>> "Manually building an image", but the critical step (2), says: "Configure
>> anything that’s needed for the distribution to work properly in a container
>> (if anything is needed)." and that's really what I'm asking here.
>>
>> Because I have everything set up with a fair amount of "magic" to pxe
>> boot and configure bare metal and KVM instances, I'd like to use that
>> process and avoid having to write more to create the rootfs.
>>
>> So maybe a better question would be, given a qcow2 (or raw) image created
>> with kvm, what are the necessary steps to convert that so that it can be
>> used inside a container?
>>
>
>
> If you have an ubuntu image, you should be able to simply comment-out all
> entry in fstab, and use it as container rootfs.
>
> I have an ubuntu zfsroot AMI for EC2 (which already has an empty fstab).
> And the steps to convert THAT is 'nothing' (if you can tolerate some delays
> in service starting, due to zfs errors inside the containers), or simply
> uninstall some packages (zfsutils-linux, anything related to cloud-init,
> all kernel versions)
>
>
>
>> that said having the same steps starting from debootstrap could be handy.
>>
>>
> rootfs created by lxc templates should also be usable in lxd:
> https://github.com/lxc/lxc/tree/master/templates
> the files include debootstrap/yum and configure steps.
>
> --
> Fajar
> _______________________________________________
> lxc-users mailing list
> lxc-users at lists.linuxcontainers.org
> http://lists.linuxcontainers.org/listinfo/lxc-users
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.linuxcontainers.org/pipermail/lxc-users/attachments/20170426/c5229e26/attachment.html>