[Lxc-users] lxc-execute fails to exec lxc-init

[Serge Hallyn]

Quoting Fajar A. Nugraha (list at fajar.net):
> On Tue, Mar 27, 2012 at 6:16 PM, Peter Gillard-Moss
> <pgillard at thoughtworks.com> wrote:
> > Hello,
> >
> > I wondered if you could help.
> >
> > I have installed lxc-init from the Ubuntu package repos for both Natty and
> > Oneiric and both fail on lxc-execute with the same error.
> >
> > Versions used are 0.7.4-0ubuntu7.2 (Natty) and 0.7.5-0ubuntu8.5 (Oneiric)
> >
> > I wondered if you could help me understand what I am doing wrong?
> >
> > I start by creating a container:
> >    sudo lxc-create -n test -t natty -f /etc/lxc/lxc.conf
> >
> > I then run lxc-execute like so:
> >    sudo lxc-execute --name test 'echo "Hello"'
> > And I get the following response:
> >    lxc-execute: No such file or directory - failed to exec
> > /usr/lib/lxc/lxc-init
> >    lxc-execute: invalid sequence number 1. expected 2
> >    lxc-execute: failed to spawn 'test'
> 
> IMHO lxc-execute should come with a BIG warning "DON'T USE UNLESS YOU
> REALLY KNOW WHAT YOU'RE DOING!" :P

Agreed.  It also might help to build a statically linked version of
lxc-init.  Ubuntu and Debian in any case could stand to ship a
package containing only a statically linked lxc-init, perhaps called
'lxc-execute-guest' or something.

> Anyway, to answer you question, if you want to use lxc-execute, you
> need to have lxc installed in the guets container as well. To be
> accurate, you need /usr/lib/lxc/lxc-init inside the guest container.
> 
> "lxc-create" does NOT install lxc in guest container because it's not
> needed for "nornal" operation (e.g. lxc-start).
> 
> -- 
> Fajar
> 
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