K8s plugin allows to create Instance for vFW demo (with Plugin Instance API) but pods created with virtlet fail to start with following error

Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal Scheduled 42m default-scheduler Successfully assigned default/r1-firewall-685954ff7-sjl2n to localhost
Warning FailedCreatePodSandBox 10m (x5 over 38m) kubelet, localhost Failed create pod sandbox: rpc error: code = DeadlineExceeded desc = context deadline exceeded
Warning FailedCreatePodSandBox 3m27s (x65 over 38m) kubelet, localhost Failed create pod sandbox: rpc error: code = Unknown desc = "/run/virtlet.sock": rpc error: code = 2 desc = Error adding pod r1-firewall-685954ff7-sjl2n (af0d3143-ad2c-11e9-9af9-fa163ee69be5) to CNI network: server returned error: error getting fd: error creating new netns for pod r1-firewall-685954ff7-sjl2n (af0d3143-ad2c-11e9-9af9-fa163ee69be5): exit status 1

The details of instance are following (SB-00 environment):

{
"id": "LepE0MLh",
"request": {
"rb-name": "K8sVspFinal..base_dummy..module-0",
"rb-version": "1",
"profile-name": "p1",
"cloud-region": "k8scloudregion1",
"labels": {}
},
"namespace": "default",
"resources": [
{
"GVK":

{ "Group": "", "Version": "v1", "Kind": "ConfigMap" }

,
"Name": "sink-configmap"
},
{
"GVK":

{ "Group": "", "Version": "v1", "Kind": "Service" }

,
"Name": "sink-service"
},
{
"GVK":

{ "Group": "apps", "Version": "v1", "Kind": "Deployment" }

,
"Name": "r1-packetgen"
},
{
"GVK":

{ "Group": "apps", "Version": "v1", "Kind": "Deployment" }

,
"Name": "r1-sink"
},
{
"GVK":

{ "Group": "apps", "Version": "v1", "Kind": "Deployment" }

,
"Name": "r1-firewall"
},
{
"GVK":

{ "Group": "", "Version": "v1", "Kind": "Network" }

,
"Name": "_ovn4nfvk8s_onap-private-net"
},
{
"GVK":

{ "Group": "", "Version": "v1", "Kind": "Network" }

,
"Name": "_ovn4nfvk8s_protected-private-net"
},
{
"GVK":

{ "Group": "", "Version": "v1", "Kind": "Network" }

,
"Name": "_ovn4nfvk8s_unprotected-private-net"
}
]
}