LXC natty guest failing to configure properly

Bug #740167 reported by Ahmed Kamal on 2011-03-22
This bug affects 1 person
Affects Status Importance Assigned to Milestone
Fix Released
debootstrap (Ubuntu)
Colin Watson
netbase (Ubuntu)

Bug Description

Binary package hint: lxc

Errors were encountered while processing:
dpkg: dependency problems prevent configuration of inetutils-ping:
 inetutils-ping depends on netbase; however:
  Package netbase is not installed.
dpkg: error processing inetutils-ping (--configure):
 dependency problems - leaving unconfigured

It seems package "netbase" needs to be added to the minimal install, it doesn't need any extra dependencies

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: lxc 0.7.4-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-7.36-generic 2.6.38
Uname: Linux 2.6.38-7-generic x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
Date: Tue Mar 22 14:43:14 2011
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Alpha amd64 (20100620)
SourcePackage: lxc
UpgradeStatus: Upgraded to natty on 2011-01-10 (70 days ago)

Ahmed Kamal (kim0) wrote :
Serge Hallyn (serge-hallyn) wrote :

When exactly do you see this? I'm not getting that error...

Though maybe my caches are not new enough. Recaching.

Ahmed Kamal (kim0) wrote :

I debootstrapped a fresh natty (outside of lxc) and got the same behaviour. Command used:

sudo debootstrap --verbose --variant=minbase --components=main,universe --arch=amd64 --include=$packages natty deboot/

$packages is the same from lxc script

Serge Hallyn (serge-hallyn) wrote :

So what sort of system is this? Is it some flavour which doesn't include netbase by default?

Changed in lxc (Ubuntu):
status: New → Incomplete
importance: Undecided → High
Serge Hallyn (serge-hallyn) wrote :

Guess the question doesn't quite make sense. But I'm still not seeing that issue anywhere. Weird.

Serge Hallyn (serge-hallyn) wrote :

Is this actually a bug in debootstrap, as it seems to be not installing dependencies?

Ahmed Kamal (kim0) wrote :

Not sure why you're not able to reproduce it .. I'm hitting this every time .. Here's a full log
my host OS is Natty x64 updated to latest

Once I sudo chroot inside, apt-get -f install .. wants to install netbase

Serge Hallyn (serge-hallyn) wrote :

It is my understanding that any 'Depends:' for --include=alpha,beta packages should be automatically resolved by debootstrap UNLESS --no-resolve-deps is given. So I think what Ahmed has here is a bug in debootstrap.

If I'm off base with that, please feel free to reassign the bug to package 'lxc', with me as owner, and I"ll take Ahmed's patch. I just worry that I'll be papering over a real bug if I do that.

affects: lxc (Ubuntu) → debootstrap (Ubuntu)
Serge Hallyn (serge-hallyn) wrote :

Interesting, I'm now getting

W: Failure while configuring base packages. This will be re-attempted up to five times.
W: Failure while configuring base packages. This will be re-attempted up to five times.
W: Failure while configuring base packages. This will be re-attempted up to five times.
W: Failure while configuring base packages. This will be re-attempted up to five times.
W: Failure while configuring base packages. This will be re-attempted up to five times.

But that is immediately followed by

I: Base system installed successfully.

and the resulting container is good.

Serge Hallyn (serge-hallyn) wrote :

Ah, and booted into the container,

dpkg -l | grep netbase

returns nothing.

tags: added: server-nrs
Chuck Short (zulcss) wrote :

This is fixed in natty.

Changed in lxc:
status: New → Fix Released
Serge Hallyn (serge-hallyn) wrote :

Note - this is fixed in natty for lxc. That is a workaround for what I believe is a real bug in debootstrap.

I don't know why the debootstrap bug is marked 'incomplete'. I'm going to mark it 'confirmed'. Please reset if I'm wrong on that, and, if you do, re-ask for whatever info you wanted.

Changed in debootstrap (Ubuntu):
status: Incomplete → Confirmed
Serge Hallyn (serge-hallyn) wrote :

No bug in debootstrap. Rather, netbase's priority has changed from 'required' to 'important'. That makes the difference between minbase pulling it in.

I don't know if this should be deemed a bug in netbase or not.

Changed in debootstrap (Ubuntu):
status: Confirmed → Invalid
Changed in netbase (Ubuntu):
status: New → Incomplete
status: Incomplete → Invalid
Serge Hallyn (serge-hallyn) wrote :

Guess it's actually a dup of bug 86536.

Serge Hallyn (serge-hallyn) wrote :

Ok, basically resolve_deps() is broken. It gets called once with the $additional (--include=) package list. It calls 'PKGS=$PKGDETAILS GETDEPS $PKGS", in a loop while $PKGS is not empty. But pkgdetails only looks at the first package on the list at a time.

So after the first call to pkgdetails, only the first package in $PKGS was ever looked up, and all others are gone.

Which means only the first package listed ever gets its dependencies looked up.

It's worth seeing if debian's debootstrap has a fix for this. If not, I think the best fix is to change that loop so that we call pkgdetails GETDEPS for one package out of $PKGS at a time (making sure to weed out duplicates at every step of course, but this time by simply using 'without' at the end of each loop against a list of already-looked-up packages) instead of trying to overload $PKGS as it currently does.

Changed in debootstrap (Ubuntu):
status: Invalid → In Progress
assignee: nobody → Serge Hallyn (serge-hallyn)
Colin Watson (cjwatson) wrote :

We have exactly the same version of debootstrap as Debian.

Colin Watson (cjwatson) wrote :

I'm still working on reproducing this, but I'm not sure I agree with your analysis of what pkgdetails is doing. The relevant bit of code is:

        $in = 1 if (/^Package: (.*)$/ && grep {$_ eq $1} @ARGV);

and that condition is true if the text after "Package: " is equal to any element of @ARGV.

Colin Watson (cjwatson) wrote :

The problem is actually that it's running pkgdetails_perl GETDEPS only on the Packages file for main, but inetutils-ping is in universe so it fails to notice its dependencies.

Changed in debootstrap (Ubuntu):
assignee: Serge Hallyn (serge-hallyn) → Colin Watson (cjwatson)
Colin Watson (cjwatson) wrote :

In fact, there's a to-do comment for this very thing:

        # XXX: I can't think how to deal well with dependency resolution and
        # lots of Packages files. -- aj 2005/06/12

Colin Watson (cjwatson) wrote :

This is in the queue for after beta-2.

Changed in debootstrap (Ubuntu):
status: In Progress → Fix Committed
Serge Hallyn (serge-hallyn) wrote :

Thanks, the fix looks sensible to me. I'll test as soon as it hits natty.

Serge Hallyn (serge-hallyn) wrote :

Actually, I went ahead and tested on natty. All dependencies were installed.

Colin Watson (cjwatson) wrote :

Perfect, thanks.

Launchpad Janitor (janitor) wrote :

This bug was fixed in the package debootstrap - 1.0.29ubuntu1

debootstrap (1.0.29ubuntu1) natty; urgency=low

  * Cherry-pick from trunk:
    - Resolve dependencies from all requested components (LP: #740167).
 -- Colin Watson <email address hidden> Wed, 13 Apr 2011 18:48:24 +0100

Changed in debootstrap (Ubuntu):
status: Fix Committed → Fix Released
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