Docker+nodejs+5ip. How to make external http request through different IPs?

Question

Computer networks

1) There is a third-party api with a limit on the number of requests per minute.
2) There is a dedicated server with 5 ip addresses.
3) Application on nodejs + docker
The task is to run 5 containers so that each http request is made through its own ip address. In order not to run into limits

Answer 1

https://www.npmjs.com/package/request#requestoptio...
localAddress

Answer 2

use the macvlan driver https://docs.docker.com/network/macvlan/
like this:

docker network create -d macvlan --subnet=10.2.4.96/16 --gateway=10.1.1.1 -o parent=eno1 mac_net
docker run --net=mac_net --ip=10.2.5.5 -it --rm busybox
/ # ping 10.1.2.10 -c 1
PING 10.1.2.10 (10.1.2.10): 56 data bytes
64 bytes from 10.1.2.10: seq=0 ttl=63 time=0.423 ms

docker run --net=mac_net --ip=10.2.5.6 -it --rm busybox
/ # ping 10.1.2.10 -c 1
PING 10.1.2.10 (10.1.2.10): 56 data bytes
64 bytes from 10.1.2.10: seq=0 ttl=63 time=0.423 ms

while tcpdump running on the host shows this:

10:29:07.257561 IP 10.2.5.5 > 10.1.2.10: ICMP echo request, id 1536, seq 2, length 64
10:29:07.257924 IP 10.1.2.10 > 10.2.5.5: ICMP echo reply, id 1536, seq 2, length 64
10:29:26.101902 IP 10.2.5.6 > 10.1.2.10: ICMP echo request, id 1536, seq 0, length 64
10:29:26.102431 IP 10.1.2.10 > 10.2.5.6: ICMP echo reply, id 1536, seq 0, length 64