Re: [libvirt-users] starting lxcs from within a vm using libvirt

Robb Walker
Tue, 15 Jul 2014 14:29:53 -0000

Just another ping, and please let me know if this is not the proper format to
re-ask my submitted question, but anyone else having any joy on running lxcs via
libvirt launched from within a vm?


________________________________________
From: libvirt-users-bounces@redhat.com <libvirt-users-bounces@redhat.com>
on behalf of Robb Walker <rwalker@DRWHoldings.com>
Sent: Thursday, July 10, 2014 4:06 PM
To: libvirt-users@redhat.com
Subject: [libvirt-users] starting lxcs from within a vm using libvirt

my goal for testing/simulations is to be able to run a vm on my desktop and
within that vm run linux containers

currently I can start an ubuntu trusty vm using libvirt as my broker to qemu or
qemu-system-x86_64 directly and start a saucy-based lxc using lxc-tools. I
invoke lxc-start -n name -f configfile and within a few seconds I'm logged
into my saucy based lxc. I can't start the lxc thru libvirt i.e. virsh -c
lxc:/// start domain


Again, if I try to use libvirt to "install" and start the lxc from
within the vm, no joy. Results below:


>>>

root@vullbvrt69:~# virt-install --connect lxc:/// -n vulslxc01 -r 512
--filesystem /qemu_lxc/ss_140521/,/ --serial pty --serial pty

Starting install...
Creating domain...
|    0 B     00:00
error: failed to get domain '22542'
error: Domain not found: No domain with matching name '22542'

Domain creation completed. You can restart your domain by running:

root@vullbvrt69:~# virsh -c lxc:/// list --all
 Id    Name                           State
----------------------------------------------------
 -     vulslxc01                 shut off

root@vullbvrt69:~# virsh -c lxc:/// start vulslxc01
Domain vulslxc01 started


root@vullbvrt69:~# virsh -c lxc:/// console vulslxc01 --devname serial1
error: The domain is not running

root@vullbvrt69:~# virsh -c lxc:/// list --all
 Id    Name                           State
----------------------------------------------------
 -     vulslxc01                 shut off

>>>


My physical desktop is running precise 12.04.4

----qemu-kvm                                     1.0+noroms-0ubuntu14.15

----libvirt-bin                                  0.9.8-2ubuntu17.19

----lxc                                          0.7.5-3ubuntu69

This physical machine launches the trusty vm from which in turn I'm trying
to run lxcs via libvirt


Trusty vm

----libvirt-bin           1.2.2-0ubuntu13.1.1

----lxc                     1.0.4-0ubuntu0.1


The saucy lxc was not created using lxc templates just a normal minbase
debootstrap.



I have run virt-install with -d. Nothing obvious jumps out except the above
Domain not found

virsh -c lxc:/// -d4 -l debug.out start domain_name  dumps nothing into
debug.out


thx in advance for any and all help and apolgies in advance if I've dropped
critical info to help sort this out



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