Re: [libvirt] Loosing lxc guests when restarting libvirt
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