Memif2Memif

Test memif to memif connection

This example shows that NSC and NSE on the one node can find each other.

NSC and NSE are using the memif mechanism to connect to its local forwarder.

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}

Select node to deploy NSC and NSE:

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:

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-memif?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: ${NODE}
EOF

Create NSE patch:

cat > patch-nse.yaml <<EOF
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nse-memif
spec:
  template:
    spec:
      containers:
        - name: nse
          env:
            - name: NSM_CIDR_PREFIX
              value: 172.16.1.100/31
      nodeSelector:
        kubernetes.io/hostname: ${NODE}
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-memif -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-memif -n ${NAMESPACE} --template '{{range .items}}{{.metadata.name}}{{"\n"}}{{end}}')

Check connectivity:

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)"

Check connectivity:

result=$(kubectl exec "${NSE}" -n "${NAMESPACE}" -- vppctl ping 172.16.1.101 repeat 4)
echo ${result}
! echo ${result} | grep -E -q "(100% packet loss)|(0 sent)|(no egress interface)"

Cleanup

Delete ns:

kubectl delete ns ${NAMESPACE}