local-forwarder-remote-forwarder

Local Forwarder + Remote Forwarder restart

This example shows that NSM keeps working after the local Forwarder + remote Forwarder restarts.

NSC and NSE are 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 setup.

Run

Deploy NSC and NSE:

kubectl apply -k https://github.com/networkservicemesh/deployments-k8s/examples/heal/local-forwarder-remote-forwarder?ref=34e1f2476dbc21097ab0a50348a966fd58b79985

Wait for applications ready:

kubectl wait --for=condition=ready --timeout=1m pod -l app=alpine -n ns-local-forwarder-remote-forwarder

kubectl wait --for=condition=ready --timeout=1m pod -l app=nse-kernel -n ns-local-forwarder-remote-forwarder

Ping from NSC to NSE:

kubectl exec pods/alpine -n ns-local-forwarder-remote-forwarder -- ping -c 4 172.16.1.100

Ping from NSE to NSC:

kubectl exec deployments/nse-kernel -n ns-local-forwarder-remote-forwarder -- ping -c 4 172.16.1.101

Find nsc and nse nodes:

NSC_NODE=$(kubectl get pods -l app=alpine -n ns-local-forwarder-remote-forwarder --template '{{range .items}}{{.spec.nodeName}}{{"\n"}}{{end}}')
NSE_NODE=$(kubectl get pods -l app=nse-kernel -n ns-local-forwarder-remote-forwarder --template '{{range .items}}{{.spec.nodeName}}{{"\n"}}{{end}}')

Find local Forwarder:

FORWARDER1=$(kubectl get pods -l 'app in (forwarder-ovs, forwarder-vpp)' --field-selector spec.nodeName==${NSC_NODE} -n nsm-system --template '{{range .items}}{{.metadata.name}}{{"\n"}}{{end}}')

Find remote Forwarder:

FORWARDER2=$(kubectl get pods -l 'app in (forwarder-ovs, forwarder-vpp)' --field-selector spec.nodeName==${NSE_NODE} -n nsm-system --template '{{range .items}}{{.metadata.name}}{{"\n"}}{{end}}')

Restart local and remote Forwarders:

kubectl delete pod ${FORWARDER1} -n nsm-system

kubectl delete pod ${FORWARDER2} -n nsm-system 

Waiting for new ones:

kubectl wait --for=condition=ready --timeout=1m pod -l 'app in (forwarder-ovs, forwarder-vpp)' --field-selector spec.nodeName==${NSC_NODE} -n nsm-system

kubectl wait --for=condition=ready --timeout=1m pod -l 'app in (forwarder-ovs, forwarder-vpp)' --field-selector spec.nodeName==${NSE_NODE} -n nsm-system

Ping from NSC to NSE:

kubectl exec pods/alpine -n ns-local-forwarder-remote-forwarder -- ping -c 4 172.16.1.100

Ping from NSE to NSC:

kubectl exec deployments/nse-kernel -n ns-local-forwarder-remote-forwarder -- ping -c 4 172.16.1.101

Cleanup

Delete ns:

kubectl delete ns ns-local-forwarder-remote-forwarder