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e2e/network: dump iptables and conntrack flows for debugging

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Signed-off-by: Daman Arora <aroradaman@gmail.com>
This commit is contained in:
Daman Arora 2024-05-14 15:16:18 +05:30
parent 4f04dffe5b
commit 3f2deb51ad
1 changed files with 21 additions and 0 deletions
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21
test/e2e/framework/network/utils.go
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@ -342,6 +342,27 @@ func (config *NetworkingTestConfig) DialFromContainer(ctx context.Context, proto
}
framework.Logf("Dump network information for node %s:\n%s", node.Name, result)
}
// Dump the node iptables rules and conntrack flows for troubleshooting #123760
podList, _ := config.f.ClientSet.CoreV1().Pods("kube-system").List(ctx, metav1.ListOptions{
LabelSelector: "k8s-app=kube-proxy",
})
for _, pod := range podList.Items {
// dump only for the node running test-container-pod
if pod.Status.HostIP == config.TestContainerPod.Status.HostIP {
output, _, _ := e2epod.ExecWithOptions(config.f, e2epod.ExecOptions{
Namespace: "kube-system",
PodName: pod.Name,
ContainerName: "kube-proxy",
Command: []string{"sh", "-c", fmt.Sprintf(`echo "IPTables Dump: " && iptables-save | grep "%s/%s:http" && echo "Conntrack flows: " && conntrack -Ln -p tcp | grep %d`, config.Namespace, config.NodePortService.Name, EndpointHTTPPort)},
Stdin: nil,
CaptureStdout: true,
CaptureStderr: true,
PreserveWhitespace: false,
})
framework.Logf("Dump iptables and connntrack flows\n%s", output)
break
}
}
return returnMsg
}