If you want to watch live traffic in a pod with wireshark…

Then you need to install tshark in your pod and then:

kubectl exec your-PODs-ID -- bash -c "tshark -i eth0 -w - port 80 2>/dev/null" | wireshark -k -i -

Adapt the parameters to your context. Thanks gbi for his Howtoforge article that showed me the way.