test-inter-node-network.sh
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Authored by ardumont on Apr 26 2022, 11:28 AM.

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	#!/usr/bin/env bash

	# set -x

	export KUBECONFIG=staging-workers.yaml

	kubectl create -f overlay-test.yaml

	# kubectl rollout status ds/overlaytest
	# > should diplay
	# daemon set "overlaytest" successfully rolled out

	echo "=> Start network overlay test"
	kubectl get pods -l name=overlaytest -o jsonpath='{range .items[*]}{@.metadata.name}{" "}{@.spec.nodeName}{"\n"}{end}' \|

	while read spod shost
	do kubectl get pods -l name=overlaytest -o jsonpath='{range .items[*]}{@.status.podIP}{" "}{@.spec.nodeName}{"\n"}{end}' \|
	while read tip thost
	do kubectl --request-timeout='10s' exec $spod -c overlaytest -- /bin/sh -c "ping -c2 $tip > /dev/null 2>&1"
	RC=$?
	if [ $RC -ne 0 ]
	then echo FAIL: $spod on $shost cannot reach pod IP $tip on $thost
	else echo $shost can reach $thost
	fi
	done
	done

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overlay-test.yaml:

apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: overlaytest
spec:
  selector:
      matchLabels:
        name: overlaytest
  template:
    metadata:
      labels:
        name: overlaytest
    spec:
      tolerations:
      - operator: Exists
      containers:
      - image: rancherlabs/swiss-army-knife
        imagePullPolicy: Always
        name: overlaytest
        command: ["sh", "-c", "tail -f /dev/null"]
        terminationMessagePath: /dev/termination-log

staging-workers.yaml is retrieved out of [1], 'Download Kube Config' button.

[1] https://rancher.euwest.azure.internal.softwareheritage.org/dashboard/c/c-t85mz/explorer#cluster-events

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test-inter-node-network.sh
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