Re: Daemons and deboostrap

[Claudius Heine <ch@denx.de>]

[-- Attachment #1: Type: text/plain, Size: 2858 bytes --]

On Fri, 2018-06-01 at 08:42 +0200, Claudius Heine wrote:
> Hi,
> 
> On Wed, 2018-05-30 at 19:30 +0200, Jan Kiszka wrote:
> > On 2018-05-27 21:30, Alexander Smirnov wrote:
> > > On 05/27/2018 07:00 PM, Alexander Smirnov wrote:
> > > > Hi all,
> > > > 
> > > > testing patches from mailing list I've found the problem with
> > > > the
> > > > current next: there are lots of daemons remain running after
> > > > build is
> > > > complete (./scripts/ci_build.sh -q).
> > > > 
> > > > 8<--
> > > > 
> > > > $ ps ax
> > > > ...
> > > > 24785 ?        Ssl    0:00 /usr/bin/qemu-arm-static
> > > > /usr/sbin/sshd
> > > > 25085 ?        Ssl    0:00 /usr/bin/qemu-arm-static
> > > > /usr/bin/dbus-daemon --system
> > > >   3046 ?        Ssl    0:00 /usr/bin/qemu-arm-static
> > > > /usr/bin/dbus-daemon --system
> > > >   4582 ?        Ss     0:00 /usr/bin/dbus-daemon --system
> > > >   8577 ?        Ssl    0:00 /usr/bin/qemu-arm-static
> > > > /usr/bin/dbus-daemon --system
> > > > ...
> > > > 
> > > > 8<--
> > > > 
> > > 
> > > CI server contains tens of dbus processes, so it's not the issue
> > > of
> > > my
> > > host.
> > 
> > Likely not noticed by us here as we usually build in containers,
> > and
> > they tear down those daemons once your build is done.
> 
> I normally don't exit the container after a build so it should be
> happening there as well, but it didn't for me.
> I might have to spend some time testing with different packages in
> order to reproduce this, but I am pretty sure I tried installing
> openssh before.
> 
> > That said, seems reasonable to restore some daemon startup
> > prevention
> > then, maybe now with clearer comments why that is needed - I
> > vaguely
> > recall an internal discussion where the reasons for the existence
> > of
> > that measures remain open.
> 
> Since installing debian via chroot and debootstrap is one of the
> official supported ways of doing it, I would suspect that starting
> daemons within that environment should be prevented upstream.
> 
> Maybe take a look at how the debian-installer handles this?

I took a look at the debian-installer code and they divert it as well
[1]. So we have to implement something like this as well.

That code is interesting, we might want to copy more than just the
daemon-start-stop divertion process.

Cheers,
Claudius


[1] https://salsa.debian.org/installer-team/debian-installer-utils/blob
/master/chroot-setup.sh#L66

-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-54 Fax: (+49)-8142-66989-80 Email: ch@denx.de

            PGP key: 6FF2 E59F 00C6 BC28 31D8 64C1 1173 CB19 9808 B153
                              Keyserver: hkp://pool.sks-keyservers.net

[-- Attachment #2: This is a digitally signed message part --]
[-- Type: application/pgp-signature, Size: 833 bytes --]