[Buildbot-devel] Running buildslaves in chroot

Dan Kegel dank at kegel.com
Sat Nov 29 21:01:42 UTC 2014

I've been doing this with linux containers for some time.

Containers are not yet a security solution.  You can escape out of a
chroot jail (the exploit's a bit different for lxc containers, but
still available).

But it's worth it just for the isolation alone; my builds need to
install debian packages, and I use ephemeral lxc containers for the
linux buildslaves to get a fresh vanilla system every time.

On Sat, Nov 29, 2014 at 12:46 PM, Michael Hansen
<michael.schacht.hansen at gmail.com> wrote:
> Hi,
> I have been using buildbot a while now, it has been a great help to our
> project.
> I am looking to add some sophistication to our setup and I am considering
> running the buildslaves in chroot environment to a) be able to build for
> multiple distros/releases on the same host, b) isolate the build slaves from
> the main system, and c) run a few build steps as root (we generate some
> distribution images and root privileges are needed to run some of the tools,
> e.g. debootstrap and others).
> In my buildslaves i need access to the /proc (for some GPU unit tests)
> filesystem so I mount that in the chroot environment but other than that the
> slave does not have access to the main system.
> My question is, is this safe? Are there any security issues with running in
> a chroot jail or is it inherently safer than running it in the main system?
> Thanks,
> Michael
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