vl3-basic

vL3 single cluster example

This example shows how could be configured vL3 network via NSM.

Diagram:

NOTE: Forwarder and NSMmgr are missed in the diagram for the simplicity

Run

Create ns to deploy nse and nsc:

kubectl create ns ns-vl3

Deploy network service, nsc and vl3 nses (See at kustomization.yaml):

kubectl apply -k https://github.com/networkservicemesh/deployments-k8s/examples/features/vl3-basic?ref=58a90eb58a3e06f02cbd99c221b35327488025cc

Find all nscs:

nscs=$(kubectl  get pods -l app=nsc-kernel -o go-template --template="{{range .items}}{{.metadata.name}} {{end}}" -n ns-vl3) 
[[ ! -z $nscs ]]

Ping each client by each client:

for nsc in $nscs 
do
    ipAddr=$(kubectl exec -n ns-vl3 $nsc -- ifconfig nsm-1)
    ipAddr=$(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-)
    for pinger in $nscs
    do
        echo $pinger pings $ipAddr
        kubectl exec $pinger -n ns-vl3 -- ping -c4 $ipAddr
    done
done

Ping each vl3-nse by each client. Note: By default we're using ipam prefix is 169.254.0.0/16 and client prefix len is 24. We also have two vl3 nses in this example. So we are expect to have a two vl3 addresses: 169.254.0.0 and 169.254.1.0 that should be accessible by each client.

for nsc in $nscs 
do
    echo $nsc pings nses
    kubectl exec -n ns-vl3 $nsc -- ping 169.254.0.0 -c4
    kubectl exec -n ns-vl3 $nsc -- ping 169.254.1.0 -c4
done

Cleanup

To cleanup the example just follow the next command:

kubectl delete ns ns-vl3