Previous commit "Use ip address from CNI output" introduces
ability to run pod which can havn't eth0. But also it
add problem: after kubelet restart, if we have already started
pod w/o eth0, kubelet can't find proper interface (it's
normal for vhostuser type of cni plugin when eth0 doesn't exist)
and kubelet restarts "broken" pod.
Fix of this issue requeres new feature of libcni - caching
results.
Looks like new libcni requires cniVersion in CNI output.
This patch specifies version both for CNI conf and CNI output.
Signed-off-by: Alexey Perevalov <a.perevalov@samsung.com>