Memif2Vxlan2Kernel

Test memif to vxlan to kernel connection

This example shows that NSC and NSE on the different nodes could find and work with each other.

NSC is using the memif mechanism to connect to its local forwarder. NSE is using the kernel mechanism to connect to its local forwarder. Forwarders are using the vxlan mechanism to connect with each other.

Requires

Make sure that you have completed steps from basic or memory setup.

Run

Create test namespace:

NAMESPACE=($(kubectl create -f https://raw.githubusercontent.com/networkservicemesh/deployments-k8s/041ba2468fb8177f53926af0eab984850aa682c2/examples/use-cases/namespace.yaml)[0])
NAMESPACE=${NAMESPACE:10}

Get nodes exclude control-plane:

NODES=($(kubectl get nodes -o go-template='{{range .items}}{{ if not .spec.taints  }}{{index .metadata.labels "kubernetes.io/hostname"}} {{end}}{{end}}'))

Create customization file:

cat > kustomization.yaml <<EOF
---
apiVersion: kustomize.config.k8s.io/v1beta1
kind: Kustomization

namespace: ${NAMESPACE}

bases:
- https://github.com/networkservicemesh/deployments-k8s/apps/nsc-memif?ref=041ba2468fb8177f53926af0eab984850aa682c2
- https://github.com/networkservicemesh/deployments-k8s/apps/nse-kernel?ref=041ba2468fb8177f53926af0eab984850aa682c2

patchesStrategicMerge:
- patch-nsc.yaml
- patch-nse.yaml
EOF

Create NSC patch:

cat > patch-nsc.yaml <<EOF
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nsc-memif
spec:
  template:
    spec:
      containers:
        - name: nsc
          env:
            - name: NSM_NETWORK_SERVICES
              value: memif://icmp-responder/nsm-1

      nodeSelector:
        kubernetes.io/hostname: ${NODES[0]}
EOF

Create NSE patch:

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: 172.16.1.100/31
      nodeSelector:
        kubernetes.io/hostname: ${NODES[1]}
EOF

Deploy NSC and NSE:

kubectl apply -k .

Wait for applications ready:

kubectl wait --for=condition=ready --timeout=1m pod -l app=nsc-memif -n ${NAMESPACE}

kubectl wait --for=condition=ready --timeout=1m pod -l app=nse-kernel -n ${NAMESPACE}

Find NSC and NSE pods by labels:

NSC=$(kubectl get pods -l app=nsc-memif -n ${NAMESPACE} --template '{{range .items}}{{.metadata.name}}{{"\n"}}{{end}}')

NSE=$(kubectl get pods -l app=nse-kernel -n ${NAMESPACE} --template '{{range .items}}{{.metadata.name}}{{"\n"}}{{end}}')

Ping from NSC to NSE:

result=$(kubectl exec "${NSC}" -n "${NAMESPACE}" -- vppctl ping 172.16.1.100 repeat 4)
echo ${result}
! echo ${result} | grep -E -q "(100% packet loss)|(0 sent)|(no egress interface)"

Ping from NSE to NSC:

kubectl exec ${NSE} -n ${NAMESPACE} -- ping -c 4 172.16.1.101

Cleanup

Delete ns:

kubectl delete ns ${NAMESPACE}