cilium-debug.sh

cilium-debug.sh

#!/bin/bash

if [ $# -ne 2  ]
then
        echo "Usage: cilium-debug.sh <pod> <namespace>"
        exit 1
fi

pod_node=$(kubectl get pods $1 -owide -n $2 | awk '{print $7}' | tail -n1)
echo "Pod location: ${pod_node}" 

host_ip=$(kubectl get nodes -o wide | grep ${pod_node} | awk '{print $6}')
echo "Pod node IP: ${host_ip}"

pod_ip=$(kubectl get pods $1 -owide -n $2 |awk '{print $6}' | tail -n1 )
echo "Pod IP: ${pod_ip}"

cilium_pod=$(kubectl get pods -n kube-system -owide | grep cilium | grep ${pod_node} | awk '{print $1}')
echo "Cilium pod for your pod: ${cilium_pod}"

pod_endpoint=$(kubectl exec -it ${cilium_pod} -n kube-system cilium bpf endpoint list | grep ${pod_ip})
pod_mac_in_pod=$(echo ${pod_endpoint} | awk '{print tolower($5)}' | sed -e  's/mac=//')
pod_mac_in_host=$(echo ${pod_endpoint} | awk '{print tolower($6)}' | sed -e  's/nodemac=//')
echo "Pod mac addresses:"
echo "- veth in pod namespace: ${pod_mac_in_pod}"
echo "- veth in host namespace: ${pod_mac_in_host}"