[lxc-devel] lxc-execute only finds lxc-init when lxc-init is manually populated inside of the container

[Stéphane Graber]

On Wed, Mar 26, 2014 at 05:08:31PM -0400, Peter Fedorow wrote:
> How to Reproduce
> ----------------
> 1.  lxc-create -n test1 -t ubuntu
> 2.  lxc-execute -n test1 -- /bin/bash
> 
> Fails:
> lxc-execute: Failed to find an lxc-init
> 
> 3.  lxc-start -n test1 -d
> 4.  lxc-console -n test1
> 5.  login
> 6.  sudo apt-get install lxc
> 7.  sudo shutdown -h now
> 8.  lxc-execute -n test1 -- /bin/bash
> 
> Success!
> 
> 
> LXC Versions Tested
> -------------------
> Ubuntu automatic upstream - 1.0.1+master~20140326-1500-0ubuntu1~ppa1~saucy1
> Ubuntu Trusty - 1.0.1-0ubuntu1
> Ubuntu 13.10 - 1.0.0~alpha1-0ubuntu14.1
> 
> OS
> -- 
> $ lsb_release -a
> No LSB modules are available.
> Distributor ID:    Ubuntu
> Description:    Ubuntu 13.10
> Release:    13.10
> Codename:    saucy
> $ uname -a
> Linux bigserver 3.11.0-18-generic #32-Ubuntu SMP Tue Feb 18 21:11:14
> UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
> 
> 
> Additional Notes
> ----------------
> 
> Installing the binary is a work-around for 64-bit, there is no
> obvious work-around for 32-bit containers on a 64-bit host.
> 
> This is not the same as bug #22.  The library is being found, but it
> needs to be loaded from outside of the container's rootfs.
> Providing the binary alone inside of the container is insufficient
> unless the binary is statically linked and 32-bit compatible.
> 
> 
> Regards,
> Peter Fedorow


lxc-execute depends on lxc-init being available in the container rootfs,
just like lxc-start depends on /sbin/init being available in the
container rootfs.

So to use lxc-execute, you just need to make sure whatever package
provides lxc-init (in Ubuntu's case, lxc itself) is installed inside the
rootfs before you use lxc-execute.

-- 
Stéphane Graber
Ubuntu developer
http://www.ubuntu.com
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