Add dual stack support.

examples/features/README.md

@@ -17,6 +17,7 @@ To run any feature example follow steps for [Basic NSM setup](../basic)
 - [Memif2IP2Memif IPv6 example](ipv6/Memif2IP2Memif_ipv6)
 - [Kernel2Kernel dual stack example](dual-stack/Kernel2Kernel_dual_stack)
 - [Kernel2IP2Kernel dual stack example](dual-stack/Kernel2IP2Kernel_dual_stack)
+- [vL3 dual stack example](dual-stack/vl3-dual-stack)
 - [Admission webhook](./webhook)
 - [DNS](./dns)
 - [Topology aware scale from zero](./scale-from-zero)

examples/features/dual-stack/vl3-dual-stack/README.md

@@ -0,0 +1,92 @@
+# vL3 dual stack example
+
+This example shows how could be configured vL3 dual stack network via NSM.
+
+Diagram: 
+
+![NSM vL3 dual stack Diagram](./vl3-dual-stack.png "NSM Authorize Scheme")
+
+**NOTE: Forwarder and NSMmgr are missed in the diagram for the simplicity**
+
+
+## Run
+
+Deploy network service, nsc and vl3 nses (See at `kustomization.yaml`):
+```bash
+kubectl apply -k https://github.com/networkservicemesh/deployments-k8s/examples/features/dual-stack/vl3-dual-stack?ref=05a9319b78acdb91b0d4d0ef6b21736d7b17602c
+kubectl apply -k https://github.com/networkservicemesh/deployments-k8s/examples/features/dual-stack/vl3-dual-stack/ipam-ipv6?ref=05a9319b78acdb91b0d4d0ef6b21736d7b17602c
+```
+
+Wait for clients to be ready:
+```bash
+kubectl wait --for=condition=ready --timeout=2m pod -l app=alpine -n ns-vl3-dual-stack
+```
+
+Find all nscs:
+```bash
+nscs=$(kubectl get pods -l app=alpine -o go-template --template="{{range .items}}{{.metadata.name}} {{end}}" -n ns-vl3-dual-stack)
+[[ ! -z $nscs ]]
+```
+
+Ping each client by each client:
+```bash
+(
+for nsc in $nscs
+do
+    ipAddr=$(kubectl exec -n ns-vl3-dual-stack $nsc -- ifconfig nsm-1) || exit
+    ipv4Addr=$(echo $ipAddr | grep -Eo 'inet addr:[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}'| cut -c 11-)
+    ipv6Addr=$(echo $ipAddr | grep -Eo 'inet6 addr: 2001:.*' | cut -d ' ' -f 3 | cut -d '/' -f 1)
+    for pinger in $nscs
+    do
+        if [ "$nsc" != "$pinger" ]; then
+            echo $pinger pings $ipv4Addr
+            kubectl exec $pinger -n ns-vl3-dual-stack -- ping -c2 -i 0.5 $ipv4Addr || exit
+            echo $pinger pings $ipv6Addr
+            kubectl exec $pinger -n ns-vl3-dual-stack -- ping6 -c2 -i 0.5 $ipv6Addr || exit
+        fi
+    done
+done
+)
+```
+
+Ping each vl3-nse by each client.
+Note: By default ipam prefixes are `172.16.0.0/16` and `2001:db8::/64` and corresponding client prefix len-s are `24` and `112`. We also have two vl3 nses in this example. So we expect to have two ipv4 vl3 addresses: `172.16.0.0` and `172.16.1.0` and two ipv6 vl3 addresses: `2001:db8::` and `2001:db8::1:0` that should be accessible by each client.
+```bash
+(
+for nsc in $nscs
+do
+    echo $nsc pings nses
+    kubectl exec -n ns-vl3-dual-stack $nsc -- ping 172.16.0.0 -c2 -i 0.5 || exit
+    kubectl exec -n ns-vl3-dual-stack $nsc -- ping 172.16.1.0 -c2 -i 0.5 || exit
+    kubectl exec -n ns-vl3-dual-stack $nsc -- ping6 2001:db8:: -c2 -i 0.5 || exit
+    kubectl exec -n ns-vl3-dual-stack $nsc -- ping6 2001:db8::1:0 -c2 -i 0.5 || exit
+done
+)
+```
+
+Find all nses:
+```bash
+nses=$(kubectl  get pods -l app=nse-vl3-vpp -o go-template --template="{{range .items}}{{.metadata.name}} {{end}}" -n ns-vl3-dual-stack)
+[[ ! -z $nses ]]
+```
+
+Ping vl3-nse by each vl3-nse.
+```bash
+(
+for nse in $nses
+do
+    echo $nse pings nses
+    kubectl exec -n ns-vl3-dual-stack $nse -- ping 172.16.0.0 -c2 -i 0.5 || exit
+    kubectl exec -n ns-vl3-dual-stack $nse -- ping 172.16.1.0 -c2 -i 0.5 || exit
+    kubectl exec -n ns-vl3-dual-stack $nse -- ping6 2001:db8:: -c2 -i 0.5 || exit
+    kubectl exec -n ns-vl3-dual-stack $nse -- ping6 2001:db8::1:0 -c2 -i 0.5 || exit
+done
+)
+```
+
+## Cleanup
+
+To cleanup the example just follow the next command:
+```bash
+kubectl delete ns ns-vl3-dual-stack
+```

examples/features/dual-stack/vl3-dual-stack/client.yaml

@@ -0,0 +1,26 @@
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: alpine
+  labels:
+    app: alpine
+spec:
+  replicas: 2
+  selector:
+    matchLabels:
+      app: alpine
+  template:
+    metadata:
+      labels:
+        app: alpine
+      annotations:
+        networkservicemesh.io: kernel://vl3-dual-stack/nsm-1
+    spec:
+      containers:
+      - name: alpine
+        image: alpine:3.15.0
+        imagePullPolicy: IfNotPresent
+        # simple `sleep` command would work
+        # but we need `trap` to be able to delete pods quckly
+        command: ["/bin/sh", "-c", "trap : TERM INT; sleep infinity & wait"]

examples/features/dual-stack/vl3-dual-stack/ipam-deployment-patch.yaml

@@ -0,0 +1,13 @@
+---
+- op: replace
+  path: /metadata/name
+  value: vl3-ipam-ds-ipv4
+- op: replace
+  path: /metadata/labels/app
+  value: vl3-ipam-ds-ipv4
+- op: replace
+  path: /spec/selector/matchLabels/app
+  value: vl3-ipam-ds-ipv4
+- op: replace
+  path: /spec/template/metadata/labels/app
+  value: vl3-ipam-ds-ipv4

examples/features/dual-stack/vl3-dual-stack/ipam-ipv6/ipam-deployment-patch.yaml

@@ -0,0 +1,13 @@
+---
+- op: replace
+  path: /metadata/name
+  value: vl3-ipam-ds-ipv6
+- op: replace
+  path: /metadata/labels/app
+  value: vl3-ipam-ds-ipv6
+- op: replace
+  path: /spec/selector/matchLabels/app
+  value: vl3-ipam-ds-ipv6
+- op: replace
+  path: /spec/template/metadata/labels/app
+  value: vl3-ipam-ds-ipv6

examples/features/dual-stack/vl3-dual-stack/ipam-ipv6/ipam-patch.yaml

@@ -0,0 +1,17 @@
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: vl3-ipam
+  labels:
+    app: vl3-ipam
+spec:
+  template:
+    spec:
+      containers:
+        - name: vl3-ipam
+          env:
+            - name: NSM_PREFIX
+              value: 2001:db8::/64
+            - name: NSM_CLIENT_PREFIX_LEN
+              value: "112"

examples/features/dual-stack/vl3-dual-stack/ipam-ipv6/ipam-service-patch.yaml

@@ -0,0 +1,10 @@
+---
+- op: replace
+  path: /metadata/name
+  value: vl3-ipam-ds-ipv6
+- op: replace
+  path: /spec/selector/app
+  value: vl3-ipam-ds-ipv6
+- op: replace
+  path: /spec/ports/0/name
+  value: vl3-ipam-ds-ipv6

examples/features/dual-stack/vl3-dual-stack/ipam-ipv6/kustomization.yaml

@@ -0,0 +1,21 @@
+---
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+namespace: ns-vl3-dual-stack
+
+resources:
+- ../../../../../apps/vl3-ipam
+
+patches:
+ - path: ipam-patch.yaml
+ - target:
+      version: v1
+      kind: Deployment
+      name: vl3-ipam
+   path: ipam-deployment-patch.yaml
+ - target:
+      version: v1
+      kind: Service
+      name: vl3-ipam
+   path: ipam-service-patch.yaml

examples/features/dual-stack/vl3-dual-stack/ipam-service-patch.yaml

@@ -0,0 +1,10 @@
+---
+- op: replace
+  path: /metadata/name
+  value: vl3-ipam-ds-ipv4
+- op: replace
+  path: /spec/selector/app
+  value: vl3-ipam-ds-ipv4
+- op: replace
+  path: /spec/ports/0/name
+  value: vl3-ipam-ds-ipv4

examples/features/dual-stack/vl3-dual-stack/kustomization.yaml

@@ -0,0 +1,25 @@
+---
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+namespace: ns-vl3-dual-stack
+
+resources:
+- ns-vl3-dual-stack.yaml
+- netsvc.yaml
+- client.yaml
+- ../../../../apps/vl3-ipam
+- ../../../../apps/nse-vl3-vpp
+
+patches:
+ - path: nse-patch.yaml
+ - target:
+      version: v1
+      kind: Deployment
+      name: vl3-ipam
+   path: ipam-deployment-patch.yaml
+ - target:
+      version: v1
+      kind: Service
+      name: vl3-ipam
+   path: ipam-service-patch.yaml

examples/features/dual-stack/vl3-dual-stack/netsvc.yaml

@@ -0,0 +1,7 @@
+---
+apiVersion: networkservicemesh.io/v1
+kind: NetworkService
+metadata:
+  name: vl3-dual-stack
+spec:
+  payload: IP

examples/features/dual-stack/vl3-dual-stack/ns-vl3-dual-stack.yaml

@@ -0,0 +1,5 @@
+---
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: ns-vl3-dual-stack

examples/features/dual-stack/vl3-dual-stack/nse-patch.yaml

@@ -0,0 +1,20 @@
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: nse-vl3-vpp
+  labels:
+    app: nse-vl3-vpp
+spec:
+  replicas: 2
+  template:
+    spec:
+      containers:
+        - name: nse
+          env:
+            - name: NSM_PREFIX_SERVER_URL
+              value: "vl3-ipam-ds-ipv4:5006,vl3-ipam-ds-ipv6:5006"
+            - name: NSM_SERVICE_NAMES
+              value: "vl3-dual-stack"
+            - name: NSM_REGISTER_SERVICE
+              value: "false"