How to get tcpdump for containers inside Kubernetes pods

find-k8snode-interface.sh

# find the kube node of the running pod, appear next to hostIP, and note containerID hash
kubectl get pod mypod -o json
# -> save hostIP
# -> save containerID

# connect to the node and find the pods unique network interface index inside it's container
docker exec containerID /bin/bash -c 'cat /sys/class/net/eth0/iflink'
# -> returns index

# locate the interface of the node
ip link |grep ^index:
# -> returns interface

# then GO tcpdump !
tcpdump -i interface