Launchpad builder VMs upgraded to bionic

[Colin Watson]

On Wed, Sep 16, 2020 at 10:22:05AM +0100, Dimitri John Ledkov wrote:
> chroot builders do call ~= `sudo chroot` at some point.

The main work is done by sbuild, which uses schroot, not "sudo chroot".

(We used to use sbuild's sudo session mode, but I changed that to
schroot in 2017.)

> would changing limits.d + adding pam_limits to sudo pam config be
> enough for launchpad-buildd?

I think schroot does support PAM.  However, I don't think it's good
design for launchpad-buildd to rely on PAM, since after all it's not
doing any kind of interactive authentication.  I would rather not pursue
this option any further.  There are other less complicated ways to set
resource limits.

-- 
Colin Watson (he/him)                           [cjwatson at canonical.com]