Hey Christian, On Tue, 2016-12-20 at 12:29 +0100, Christian Ehrhardt wrote:
Hi, I found an issue in libvirt related to libvirt-lxc, but fail to find the root cause.
The TL;DR is: libvirt-lxc guests get killed on libvirt restart due to "internal error: No valid cgroup for machine"
It was able to reproduce libvirt 1.3.1, 2.4 and 2.5 as packages in Ubuntu and Debian. I wanted to ask for two things: - wider coverage where this does reproduce
I couldn't reproduce here with openSUSE Tumbleweed and libvirt 2.5 packages.
- your expertise on the case itself.
It seems that you'll need to check what's going on in virCgroupDetect().
Steps to reproduce: 1. Spawn new KVM Guest of your choice 2. install test dependencies $ apt-get install libvirt-daemon-system libvirt-clients libxml2-utils # or package managers / package names of your chosen os 3. run the following sequence as root export LIBVIRT_DEFAULT_URI=lxc:/// cat << EOF > /tmp/smoke-lxc.xml <domain type='lxc'> <name>sl</name> <memory unit='KiB'>256000</memory> <currentMemory unit='KiB'>256000</currentMemory> <vcpu placement='static'>1</vcpu> <os> <type>exe</type> <init>/bin/bash</init> </os> <features> <privnet/> </features> <clock offset='utc'/> <devices> <emulator>/usr/lib/libvirt/libvirt_lxc</emulator>
The emulator should be removed from the config for portability purpose: the libvirt_lxc path may vary from a distro / arch to another and libvirt's lxc driver is able to auto-add it. -- Cedric