Hi all,
I am trying to init lxc by libvirt instead of using lxc tools. I have
several questions as following:
software platform: integrating libvirt-0.10.1 to yocto based on sdk1.3
hardwatre platform: p4080ds
steps:
root at p4080ds:~# cat > container.xml <<EOF
<domain type='lxc'>
<name>container</name>
<memory>500000</memory>
<os>
<type>exe</type>
<init>/bin/sh</init>
</os>
<vcpu>1</vcpu>
<clock offset='utc'/>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>destroy</on_crash>
<devices>
<emulator>/usr/libexec/libvirt_lxc</emulator>
<interface type='network'>
<source network='default'/>
</interface>
<console type='pty' />
</devices>
</domain>
<EOF
root at p4080ds:~# libvirtd -d
root at p4080ds:~# virsh --connect lxc:/// define container.xml
Domain container defined from container.xml
root at p4080ds:~# virsh --connect lxc:/// start container
error: Failed to start domain container
error: internal error Network 'default' is not active.
To resolve this issue I change the container.xml to as below:
<domain type='lxc'>
<name>container</name>
<memory>500000</memory>
<os>
<type>exe</type>
<init>/bin/sh</init>
</os>
<vcpu>1</vcpu>
<clock offset='utc'/>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>destroy</on_crash>
<devices>
<emulator>/usr/libexec/libvirt_lxc</emulator>
<interface type='bridge'>
<source network='br0'/>
<mac address='00:11:22:34:34:34'/> (I am not sure it will make
difference)
</interface>
<console type='pty' />
</devices>
</domain>
then error infos as below:
root at p4080ds:~# virsh --connect lxc:/// define container.xml
error: Failed to define domain from container.xml
error: internal error No <source> 'bridge' attribute specified
with <interface type='bridge'/>
Q1: What an appropriate virtual network is supported by virsh for error
mentioned above?
Linux container support several types of network such as veth, vlan,
macvlan, phys and how to edit different xml file for different network type?
Q2: There are two kinds of containers , application container and system
container.
If using lxc tools, lxc-execute will establish an application container
and lxc-create with lxc-start will establish a system container.
So with libvirt how to set up these two kinds of containers? by
different xml file or by different virsh cmds?
Q3: If I want to define a rootfs (such as busybox) for container how I edit the
relative xml file? anyone has related infos that can be shared?
Q4:Cgroups manage and control resources using for lxc containers. If use
libvirt how to realise the similar resource tuning for containers based on
PowerPC?
There are limited infos at:
https://www.berrange.com/posts/2009/12/03/using-cgroups-with-libvirt-and-lxckvm-guests-in-fedora-12/
Regards,
Yuejuan
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