Hi, Sam.
> How can I make this persistant? Is there a configuration file?
Libvirt may not have that configuration.
I think you can use "cgconfig" instead of it.
Setting as follows, in my environment was successful.
1) edit /etc/cgconfig.conf
# cpuset.cpus/mems is mandatory values.
# Please set suitable values according to your environment.
----------
group libvirt {
cpuset {
cpuset.cpus = 0;
cpuset.mems = 0;
}
}
group libvirt/lxc {
cpuset {
cpuset.cpus = 0;
cpuset.mems = 0;
} devices {
devices.allow = "c 10:200 rwm";
}
}
mount {
cpuset = /cgroup/cpuset;
cpu = /cgroup/cpu;
cpuacct = /cgroup/cpuacct;
memory = /cgroup/memory;
devices = /cgroup/devices;
freezer = /cgroup/freezer;
net_cls = /cgroup/net_cls;
blkio = /cgroup/blkio;
}
----------
2) restart cgconfig and libvirtd.
# Order is "libvirtd stop->cgconfig restart->libvirtd start"
3) start lxc container.
Result in my environment(CentOS6.2 x86_64+libvirt 0.9.8) is
# virsh -c lxc:/// start lxc_container_1
Domain lxc_container_1 started
# cat /cgroup/devices/libvirt/lxc/lxc_container_1/devices.list
c 10:200 rwm <-- :-)
c 1:3 rwm
c 1:5 rwm
c 1:7 rwm
c 1:8 rwm
c 1:9 rwm
c 5:0 rwm
c 5:2 rwm
c 136:* rwm
Regards,
Mitsuru Kanabuchi
> -----Original Message-----
> From: libvirt-users-bounces@xxxxxxxxxx [mailto:libvirt-users-bounces@xxxxxxxxxx] On Behalf Of Samuel Hassine
> Sent: Wednesday, January 25, 2012 8:28 PM
> To: libvirt-users@xxxxxxxxxx
> Subject: How to change libvirt / cgroup interaction?
>
> Hi there,
>
> Do you know if there is a way to modify how libvirt interacts with the cgroup?
>
> Because, I successfully add the /dev/net/tun support in my LXC container by doing:
>
> echo c 10:200 rwm >> /cgroup/libvirt/lxc/instance-00000005/devices.allow
>
> But when I restart the instance/LXC container, this option has gone.
>
> How can I make this persistant? Is there a configuration file?
>
> Thanks for your answers.
>
> Best regards.
> Sam
>
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