in a LXD container, the syntax is: lxc config set mycontainer raw.idmap 'both 1003 1003'
as idmap is a blob, i you want assign multiple values, you have to send multilines: echo -e "both 1003 1003\nboth 1004 1004" | lxc config set mycontainer raw.idmap - 2017-03-27 15:33 GMT+02:00 Serge E. Hallyn <se...@hallyn.com>: > 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 > _______________________________________________ > lxc-users mailing list > lxc-users@lists.linuxcontainers.org > http://lists.linuxcontainers.org/listinfo/lxc-users -- Gaétan QUENTIN
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