Test if docker keeps manually assigned IPs

docker-ip-static-test.sh

#!/bin/bash

num_containers=5

docker network create -d bridge --subnet 172.99.0.0/16 test

for i in $(seq $num_containers) ; do
    containers="$containers $(docker run --network test --ip 172.99.1.$i --restart on-failure:10 -d nginx)"
done

show_ips() {
    docker inspect --format='{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' $containers
}

echo "IPs before crash"
show_ips
sudo killall -9 nginx
sleep 3
echo "IPs after crash"
show_ips
echo

echo "IPs before restart"
show_ips
docker stop $containers
docker start $containers
echo "IPs after restart"
show_ips

docker rm -f $containers
docker network rm test