(sorry hit return too fast). Also turns out that the sudo -shU trick doesn't work, results in;
deploy$ lxc-start -n u1 lxc_container: call to cgmanager_create_sync failed: invalid request Found another semi related ticket; https://github.com/lxc/lxc/issues/181 Cal On Wed, Aug 6, 2014 at 1:24 AM, Cal Leeming [Simplicity Media Ltd] < cal.leem...@simplicitymedialtd.co.uk> wrote: > Sure; > > deploy$ echo $XDG_RUNTIME_DIR > /run/user/999 > deploy$ echo $HOME > /home/deploy > > deploy$ cat /proc/self/cgroup > 11:hugetlb:/ > 10:perf_event:/ > 9:blkio:/ > 8:freezer:/ > 7:devices:/ > 6:memory:/ > 5:cpuacct:/ > 4:cpu:/ > 3:cpuset:/ > 2:name=systemd:/user/999.user/5.session > > Expected uid is 1000 (deploy) but its showing 999 (admin). > > > Cal > > > On Wed, Aug 6, 2014 at 12:22 AM, Serge Hallyn <serge.hal...@ubuntu.com> > wrote: > >> Quoting Cal Leeming [Simplicity Media Ltd] ( >> cal.leem...@simplicitymedialtd.co.uk): >> > Just wanted to chime in on this, it would seem that creating >> unprivileged >> > containers works fine, at least for download template of Ubuntu. >> > >> > However the problem starts when you use "sudo su". >> > >> > For example, the following breaks; >> > >> > admin$ sudo su deploy >> > admin$ lxc-create -t download -n u1 -- -d ubuntu -r trusty -a amd64 >> > lxc-create: Permission denied - failed to create directory >> > '/run/user/999/lock/' >> >> From this shell, what do 'echo $XDG_RUNTIME_DIR' and 'echo $HOME' say? >> >> > lxc-create: Error opening /tmp/1000/lxc//home/deploy/.local/share/lxc/u1 >> > >> > But the following works; >> > >> > admin$ ssh deploy@127.0.0.1 >> > admin$ lxc-create -t download -n u1 -- -d ubuntu -r trusty -a amd64 >> > Setting up the GPG keyring >> > Downloading the image index >> > >> > It would seem that lxc-create is picking up a uid 999 (admin) for the >> lock, >> > and uid 1000 (deploy) for the tmp directory. >> > >> > I had a quick look at the source but couldn't pin point where/why this >> was >> > happening. >> > >> > Although there are other issues with creating unprivileged containers >> (as >> > per your previous discussion), this is probably a bug in its own rights. >> > >> > Thoughts? >> > >> > Cal >> > >> > >> > >> > On Thu, Jan 9, 2014 at 4:11 PM, Serge Hallyn <serge.hal...@ubuntu.com> >> > wrote: >> > >> > > Sounds good. It might be worthwhile having a 'lxc-setup-images' >> command >> > > which requires root and builds the base images. Then unprileged users >> > > could untar/unsquash those images. >> > > >> > > To be clear, I absolutely *can* create and run ubuntu-cloud images >> > > without being root. >> > > >> > > -serge >> > > >> > > Quoting Cal Leeming [Simplicity Media Ltd] ( >> > > cal.leem...@simplicitymedialtd.co.uk): >> > > > It's also worth mentioning that fakeroot/fakechroot have some nasty >> > > issues >> > > > with debootstrap; >> > > > https://bugs.launchpad.net/ubuntu/+source/fakechroot/+bug/1265857 >> > > > >> > > > One theory I'm exploring is building "base images" on a machine >> that does >> > > > have root, by running debootstrap on every flavor/arch then using >> > > > mksquashfs to compress it down into an image. You could then use >> > > unsquashfs >> > > > to force whatever uid/gid you wanted, then fakechroot/fakeroot to >> make >> > > > whatever changes you need to the container before launching. The >> downside >> > > > is that there is no public mirror that offers this at the moment >> (other >> > > > than the latest 13.x ubuntu, which contains a filesystem.squashfs >> you can >> > > > extract, but it's 700mb). You could create your own set of base >> images, >> > > > then wrap scripts around them to create the templates, but this is >> > > > absolutely not going to work out of the box, there is a lot of >> tedious >> > > work >> > > > involved. >> > > > >> > > > I'm planning on doing a better write up about this (as its >> something I'm >> > > > actively working on), will update this thread at a later date. >> > > > >> > > > Hope this helps a bit >> > > > >> > > > Cal >> > > > >> > > > >> > > > >> > > > >> > > > On Thu, Jan 9, 2014 at 3:39 PM, Michael H. Warfield < >> m...@wittsend.com >> > > >wrote: >> > > > >> > > > > On Thu, 2014-01-09 at 08:08 +0200, Kevin Wilson wrote: >> > > > > > Hello, >> > > > > > I believe that creating a container as non root user should be >> > > > > straight-forward. >> > > > > >> > > > > Sigh... I'm afraid not... >> > > > > >> > > > > Funny, Serge and I just had a couple of comments in exchange >> about this >> > > > > very thing with regards to templates. He's been working on >> getting >> > > > > containers to run under unprivileged users and I know the Fedora >> and >> > > > > CentOS templates will not even run under a non-user (they check). >> His >> > > > > remark was that most templates will not and can not, including the >> > > > > Ubuntu template. Problem with the Ubuntu template (and, >> presumably the >> > > > > Debian template) is the use of debboot which, in turn, uses mknod >> to >> > > > > create devices for the container - and you're then toast. >> > > > > >> > > > > The problem there is that there are going to be privileged >> operations >> > > > > (chown, mknod, etc) that are simply going to require privileges >> in the >> > > > > host which are not available to the non-priv user. >> > > > > >> > > > > I'm not so sure about the busybox template but I wouldn't be >> > > optimistic. >> > > > > It does look like it checks to see if it's in a user namespace >> and uses >> > > > > mknod if not and does something else if it is. So, it looks like >> it >> > > > > SHOULD work. But you have to have user namespaces set up to work. >> > > > > >> > > > > Once a container is created, it should be possible to run it >> under a >> > > > > non-priv user if you have a recent enough kernel along with the >> latest >> > > > > lxc tools. But it seems likely we could ever navigate the morass >> of >> > > > > creating a template using lxc-create as a non-priv user. >> > > > > >> > > > > > I added a user named "test" and I am trying to create a >> container >> > > (see >> > > > > > below the sequence). I am running latest lxc git >> > > > > > (built from source, as root) on Fedora 20. >> > > > > >> > > > > > useradd test >> > > > > > su test >> > > > > > >> > > > > > lxc-create -t busybox -n busyboxTest >> > > > > > I get: >> > > > > > >> > > > > > You lack access to /home/test/.local/share/lxc/ >> > > > > > I ran; >> > > > > > mkdir -p /home/test/.local/share/lxc/ >> > > > > > >> > > > > > Then again: >> > > > > > lxc-create -t busybox -n busyboxTest >> > > > > > lxc-create: Permission denied - failed to create directory >> > > > > '/run/user/0/lock/' >> > > > > > >> > > > > > failed to create lock >> > > > > > System error loading container >> > > > > > >> > > > > > What should I do ? >> > > > > > >> > > > > > Regards, >> > > > > > Kevin >> > > > > >> > > > > Regards, >> > > > > Mike >> > > > > -- >> > > > > Michael H. Warfield (AI4NB) | (770) 978-7061 | m...@wittsend.com >> > > > > /\/\|=mhw=|\/\/ | (678) 463-0932 | >> > > > > http://www.wittsend.com/mhw/ >> > > > > NIC whois: MHW9 | An optimist believes we live in the >> best >> > > of >> > > > > all >> > > > > PGP Key: 0x674627FF | possible worlds. A pessimist is >> sure of >> > > it! >> > > > > >> > > > > >> > > > > _______________________________________________ >> > > > > lxc-users mailing list >> > > > > lxc-users@lists.linuxcontainers.org >> > > > > http://lists.linuxcontainers.org/listinfo/lxc-users >> > > > > >> > > >> > > > _______________________________________________ >> > > > lxc-users mailing list >> > > > lxc-users@lists.linuxcontainers.org >> > > > http://lists.linuxcontainers.org/listinfo/lxc-users >> > > >> > > _______________________________________________ >> > > lxc-users mailing list >> > > lxc-users@lists.linuxcontainers.org >> > > http://lists.linuxcontainers.org/listinfo/lxc-users >> > > >> >> > _______________________________________________ >> > lxc-users mailing list >> > lxc-users@lists.linuxcontainers.org >> > http://lists.linuxcontainers.org/listinfo/lxc-users >> >> _______________________________________________ >> lxc-users mailing list >> lxc-users@lists.linuxcontainers.org >> http://lists.linuxcontainers.org/listinfo/lxc-users >> > >
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