docker build -t test .
docker service create --stop-grace-period=30s -p 80:80 --name=test test
docker service scale test=4

wait for services to be up and running

On one side:

siege <yourAddress>

On another side:

docker service logs -f test |grep -v 200

On another side:

docker service scale test=1

On another side:

ip netns exec ingress_sbox ipvsadm --list

Repeat until service get killed.

This shows IPVS rules are not removed until containers are stopped.