[Bug 1326865] Re: libvirt cannot kill dhcp in containers
Serge Hallyn
1326865 at bugs.launchpad.net
Fri Jun 6 15:42:32 UTC 2014
Quoting Jamie Strandboge (jamie at ubuntu.com):
> Another idea would be to make sure that at least Ubuntu systems don't
> load apparmor policy in the container when using libvirt-lxc like we've
> done with lxc.
That actually is not happening with lxc. If you run a container
unconfined (lxc.aa_profile = unconfined) then dhclient does end up
running as /sbin/dhclient (enforce)
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https://bugs.launchpad.net/bugs/1326865
Title:
libvirt cannot kill dhcp in containers
Status in “isc-dhcp” package in Ubuntu:
New
Bug description:
If I create a ubuntu container and start it as a libvirt-lxc
container, it runs under the host dhcp profile. Then when I try virsh
-c lxc:/// destroy c1, libvirtd tries to kill dhcp in the container
but fails:
Jun 5 17:54:14 t1 kernel: [ 2563.620698] type=1400 audit(1401983654.375:28): apparmor="DENIED" operation="signal" profile="/sbin/dhclient" pid=4304 comm="libvirtd" requested_mask="receive" denied_mask="receive" signal=term peer="/usr/sbin/libvirtd"
Jun 5 17:54:14 t1 kernel: [ 2563.660491] type=1400 audit(1401983654.415:29): apparmor="DENIED" operation="signal" profile="/sbin/dhclient" pid=4293 comm="libvirtd" requested_mask="receive" denied_mask="receive" signal=term peer="/usr/sbin/libvirtd"
Jun 5 17:54:14 t1 kernel: [ 2563.660600] type=1400 audit(1401983654.415:30): apparmor="DENIED" operation="signal" profile="/sbin/dhclient" pid=4293 comm="libvirtd" requested_mask="receive" denied_mask="receive" signal=term peer="/usr/sbin/libvirtd"
I don't actually understand the mechanisms here (that a profile should
be able to refuse receiving signals), and it seems like the proper fix
is to have libvirt-lxc start containers confined in a container
policy, but Jamie seemed to have another solution, which would be
great.
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