4-2ssll
$ curl http://echo/{0..5} -s | grep Hostname
Hostname=echo-cb96f8d94-879sn
Hostname=echo-cb96f8d94-879sn
Hostname=echo-cb96f8d94-879sn
Hostname=echo-cb96f8d94-879sn
Hostname=echo-cb96f8d94-879sn
Hostname=echo-cb96f8d94-879sn
</code></pre><p>The problem here is Kubernetes will determine the backend to send to when the connection is established, and all future requests on the same connection will be sent to the same backend.
In our example here, our first 5 requests are all sent to <code>echo-cb96f8d9