add smartvf vlan trunking example

Signed-off-by: Periyasamy Palanisamy <[email protected]>

examples/ovs/README.md

@@ -11,6 +11,7 @@ Contain basic setup for NSM that includes `nsmgr`, `forwarder-ovs`, `registry-k8
 - [Kernel to Kernel Connection](../use-cases/Kernel2Kernel)
 - [Kernel to Kernel Connection over VLAN Trunking](../use-cases/Kernel2KernelVLAN)
 - [SmartVF to SmartVF Connection](../use-cases/SmartVF2SmartVF)
+- [SmartVF to SmartVF Connection over VLAN Trunking](../use-cases/SmartVf2SmartVfVlan)
 - [Admission webhook SmartVF example](../features/webhook-smartvf)
 
 ## SR-IOV config

examples/use-cases/SmartVf2SmartVfVlan/README.md

@@ -0,0 +1,128 @@
+# Test SmartVF to SmartVF connection over VLAN Trunking at NSE side
+
+
+This example shows that NS Clients and NSE on the one node can find each other. 
+
+NS Clients and NSE are using the `kernel` mechanism via SmartVF device to connect to its local ovs forwarder.
+The NS Client connections are multiplexed over single VF device on the NSE side.
+
+## Requires
+
+Make sure that you have completed steps from [ovs](../../ovs) setup.
+There is more consumption of heap memory by NSE pod due to vpp process when host is configured with
+hugepage, so in this case NSE pod should be created with memory limit > 2.2 GB.
+
+## Run
+
+Create test namespace:
+```bash
+NAMESPACE=($(kubectl create -f https://raw.githubusercontent.com/networkservicemesh/deployments-k8s/95391f6d46abc524f4b740ee093a2ec14f4eff01/examples/use-cases/namespace.yaml)[0])
+NAMESPACE=${NAMESPACE:10}
+```
+
+Select node to deploy NSC and NSE:
+```bash
+NODE=($(kubectl get nodes -o go-template='{{range .items}}{{ if not .spec.taints  }}{{index .metadata.labels "kubernetes.io/hostname"}} {{end}}{{end}}')[0])
+```
+
+Create customization file:
+```bash
+cat > kustomization.yaml <<EOF
+---
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+namespace: ${NAMESPACE}
+
+bases:
+- https://github.com/networkservicemesh/deployments-k8s/apps/nsc-kernel?ref=95391f6d46abc524f4b740ee093a2ec14f4eff01
+- https://github.com/networkservicemesh/deployments-k8s/apps/nse-vlan-vpp?ref=95391f6d46abc524f4b740ee093a2ec14f4eff01
+
+patchesStrategicMerge:
+- patch-nsc.yaml
+- patch-nse.yaml
+EOF
+```
+
+Create NSC patch:
+```bash
+cat > patch-nsc.yaml <<EOF
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: nsc-kernel
+spec:
+  replicas: 2
+  template:
+    spec:
+      containers:
+        - name: nsc
+          env:
+            - name: NSM_NETWORK_SERVICES
+              value: kernel://vlan-vpp-responder/nsm-1?sriovToken=worker.domain/100G
+          resources:
+            limits:
+              worker.domain/100G: 1
+      nodeSelector:
+        kubernetes.io/hostname: ${NODE}
+EOF
+```
+
+Create NSE patch:
+```bash
+cat > patch-nse.yaml <<EOF
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: nse-kernel
+spec:
+  template:
+    spec:
+      containers:
+        - name: nse
+          env:
+            - name: NSM_CIDR_PREFIX
+              value: 172.16.1.100/30
+          resources:
+            limits:
+              worker.domain/100G: 1
+      nodeSelector:
+        kubernetes.io/hostname: ${NODE}
+EOF
+```
+
+Deploy NSC and NSE:
+```bash
+kubectl apply -k .
+```
+
+Wait for applications ready:
+```bash
+kubectl wait --for=condition=ready --timeout=1m pod -l app=nsc-kernel -n ${NAMESPACE}
+```
+```bash
+kubectl wait --for=condition=ready --timeout=1m pod -l app=nse-kernel -n ${NAMESPACE}
+```
+
+Choose one ns client pod and nse pod by labels:
+```bash
+NSC=$((kubectl get pods -l app=nsc-kernel -n ${NAMESPACE} --template '{{range .items}}{{.metadata.name}}{{" "}}{{end}}') | cut -d' ' -f1)
+TARGET_IP=$(kubectl exec -ti ${NSC} -n ${NAMESPACE} -- ip route show | grep 172.16 | cut -d' ' -f1)
+```
+```bash
+NSE=$(kubectl get pods -l app=nse-kernel -n ${NAMESPACE} --template '{{range .items}}{{.metadata.name}}{{"\n"}}{{end}}')
+```
+
+Ping from NSC to NSE:
+```bash
+kubectl exec ${NSC} -n ${NAMESPACE} -- ping -c 4 ${TARGET_IP}
+```
+
+## Cleanup
+
+Delete ns:
+```bash
+kubectl delete ns ${NAMESPACE}
+```