Plaintext sniffing
# Create a deployment for the server with nginx image and 1 replica
kubectl create deployment server --image nginx --replicas 1
# Create a deployment for the client with nginx image and 1 replica
kubectl create deployment client --image nginx --replicas 1
# Expose the server deployment on port 80
kubectl expose deployment server --port 80
# Expose the client deployment on port 80
kubectl expose deployment client --port 80
# Get the pods labeled with app=client
kubectl get pods -l app=client # client-<...>
# Get the pods labeled with app=server
kubectl get pods -l app=server # server-<...>
# Copy the index3.html file to the server pod's nginx HTML directory
kubectl cp index3.html server-<...>:usr/share/nginx/html/index.html
# Execute the nginx reload command on the server pod
kubectl exec server-<...> -- nginx -s reload
# Open an interactive bash session in the client pod
kubectl -i -t exec client-<...> -- bash
# Get services labeled with app=server to find the cluster IP
kubectl get services -l app=server # <cluster-ip-server>
Searching for server-<...> netnamespace:
Finding server's IP:
Find and copy netnamespace <server-ns> having <server-ip>:
# Find and copy the netnamespace <server-ns> corresponding to <server-ip>
sudo ip -all netns exec ip -c a
<user>@<localhost>:~$ sudo ip netns exec <server-ns> tcpdump -i eth0 -A port http
root@client-<...>:~# curl <cluster-ip-server>
