5:44 a.m.
Hi,
if that has been discussed before, please point me to it. I have not
been able to find anything about it.
It would be great to easily generate and cd-attach cloud-init isos when
starting a vm. The config files could be taken from the file system
(e.g. %sysconfdir/cloud-init/host-name) and put into an iso. when the
host stops the generated iso should be removed.
What do you think? If that's a worthwhile cause, I would be glad to
start to implement it, if pointers are given. My C i a little rusty
unfortunately.
Thank you for your consideration,
Tobias Florek
5:59 a.m.
2015-06-19 13:44 GMT+03:00 Tobias Florek <libvirt(a)ibotty.net>:
if that has been discussed before, please point me to it. I have not
been able to find anything about it.
It would be great to easily generate and cd-attach cloud-init isos when
starting a vm. The config files could be taken from the file system
(e.g. %sysconfdir/cloud-init/host-name) and put into an iso. when the
host stops the generated iso should be removed.
What do you think? If that's a worthwhile cause, I would be glad to
start to implement it, if pointers are given. My C i a little rusty
unfortunately.
Thank you for your consideration,
Tobias Florek
I simple write daemon for this purpose. It listens for events from
netlink about creating tap devices, loookup domain from libvirt and
get domain metadata.
After that get from metadata ipv4, ipv6 addresses and provide dhcp and
ipv6 slaac service for vm, also it listens for http requests to
169.254.169.254 and provide cloud-config data for cloud-init.
Generate iso not very hard if you really need it.
--
Vasiliy Tolstov,
e-mail: v.tolstov(a)selfip.ru
6 a.m.
On Fri, Jun 19, 2015 at 12:44:51PM +0200, Tobias Florek wrote:
Hi,
if that has been discussed before, please point me to it. I have not
been able to find anything about it.
It would be great to easily generate and cd-attach cloud-init isos when
starting a vm. The config files could be taken from the file system
(e.g. %sysconfdir/cloud-init/host-name) and put into an iso. when the
host stops the generated iso should be removed.
What do you think? If that's a worthwhile cause, I would be glad to
start to implement it, if pointers are given. My C i a little rusty
unfortunately.
I'm not convinced that libvirt needs to be in the business of dynamically
generating application specific disk images. It feels like that is a task
that is more easily accomplished outside of libvirt, by a variety of
pre-existing tools. There are a tonne of tools for building images in
general. Richard Jones illustrated how to build disk images specifically
for cloud init using libguestfs as an example
https://rwmj.wordpress.com/2013/12/10/creating-a-cloud-init-config-disk-f...
So it seems sufficient to leave it to external apps. I'm not saying
you shouldn't create some general purpose tool to build it from
templates though - just that it doesn't need to be in libvirt. I could
see value in perhaps adding some code for doing this, and a CLI tool
into the virt-manager project for example. eg so virt-manager and
virt-install could simplify the task of initializing cloud init when
they deploy Vms.
Regards,
Daniel
--
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2 comments
3 participants
participants (3)
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Daniel P. Berrange -
Tobias Florek -
Vasiliy Tolstov