On Tue, Mar 14, 2017 at 02:29:01AM +0100, Benoit GEORGELIN - Association
Web4all wrote:
> ----- Mail original -----
> > De: "Simos Xenitellis" <simos.li...@googlemail.com>
> > À: "lxc-users" <lxc-users@lists.linuxcontainers.org>
> > Envoyé: Lundi 13 Mars 2017 20:22:03
> > Objet: Re: [lxc-users] Experience with large number of LXC/LXD containers
>
> > On Sun, Mar 12, 2017 at 11:28 PM, Benoit GEORGELIN - Association
> > Web4all <benoit.george...@web4all.fr> wrote:
> > > Hi lxc-users ,
>
> > > I would like to know if you have any experience with a large number of
> > > LXC/LXD containers ?
> > > In term of performance, stability and limitation .
>
> > > I'm wondering for exemple, if having 100 containers behave the same of
> > > having 1.000 or 10.000 with the same configuration to avoid to talk about
> > > container usage.
>
> > > I have been looking around for a couple of days to found any user/admin
> > > feedback experience but i'm not able to find large deployments
>
> > > Is there any ressources limits or any maximum number that can be deployed
> > > on
> > > the same node ?
> > > Beside physical performance of the node, is there any specific behavior
> > > that
> > > a large number of LXC/LXD containers can experience ? I'm not aware of any
> > > test or limits that can occurs beside number of process. But I'm sure from
> > > LXC/LXD side it might have some technical contraints ?
> > > Maybe on namespace availability , or any other technical layer used by
> > > LXC/LXD
>
> > > I will be interested to here from your experience or if you have any
> > > links/books/story about this large deployments
>
>
> > This would be interesting to hear if someone can talk publicly about
> > their large deployment.
>
> > In any case, it should be possible to create, for example, 1000 web servers
> > and then try to access each one and check any issues regarding the
> > response time.
> > Another test would be to install 1000 Wordpress installations and
> > check again for the response time
> > and resource usage.
> > Such scripts to create this massive number of containers would also be
> > helpful to replicate
> > any issues in order to solve them.
>
> > Simos
>
>
> Yes it's would be very nice to hear about this kind of infrastructure using
> lxc/lxd
> I'm not yet ready to make this kind of testing, but if someone would like to
> work on this with me as a projet, I can provide the technical infrastructure
> and scripts .
> That would be nice to provide a good testing case and analyse to share to the
> community
It should be pretty simple. I've done testing like this to test other
software, which implicitly ended up testing lxd.
You'd probably create a first container and publish it locally,
(all commands untested, just an example)
lxc launch ubuntu:xenial template
lxc exec template -- apt -y install nginx
lxc stop template
lxc publish --alias template template
Then do your testing in a loop,
# spin up containers
for i in `seq -f "%04g" 1 1000`; do
lxc launch template nginx-$i
done
# spin up clients
... etc
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