On 5/22/17 12:28 PM, Fajar A. Nugraha wrote:
Yes but I also want the current disk usage to be available inside
the container so that, for instance, df returns realistic results.
Have you tried lxd with zfs?
Yes, zfs (pool per container) is what I am currently using here...
https://raw.githubusercontent.com/netserva/sh/master/bin/setup-lxd
Did you mean zfs dataset?
Is that the same thing as a "volume" (as seen by lxd) ?
I would normally use btrfs but it can't provide usage statistics.
Using separate POOL per container should be possible in newer lxd
(e.g. in xenial-backports). However that would also negate some
benefits of using zfs, as you'd need to have separate block
device/loopback files for each pool.
That's what I suspect, not the best approach.
Besides, I am pretty sure that the performance penalty of using
loopback instead of a block devices would get worse in large numbers.
Using a default zfs pool, and having separate DATASET (or to be more
accurate, filesystem) per container, is the default setup. Which
would provide correct disk usage statistic (e.g. for "df" and such).
I did try something with "volumes" but I got the impression it did not
seem to provide correct "df" results but I was floundering around just
trying to get anything to work (with df) at the time.
And it's perfectly normal to have several hundred or thousand dataset
(which would include snapshots as well) on a single pool.
And I'd imagine copying and moving containers would make more sense.
IIRC ubuntu's roadmap is to integrate lxd (and zfs) into openstack
(which sould have lots of control panel already).
But unfortunately not in PHP so I can't deploy and extend whatever
control panels openstack offers. As far as I can see, one needs a
minimum of 5 servers just to get started with openstack so that is
180 degrees away from where I am going (super lightweight and simple).
In the mean time, your best bet is probably create your own (possibly
based on lxd-webui).
Thanks for the hint. I'm not interested in developing in Angular but
I should be able to get some frontend ideas. Once I have a basic bash
script setup working then I'll create a PHP plugin for my framework.
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