lb-from-scratch-rust

lizrice/lb-from-scratch RUST implement

Prerequisites

Docker Image: library/maborosiii/lb-from-scratch-rust

0. docker images nginx:backend_1 change the output from nginx deafult html to print "backend_1", so does nginx:backend_2, print "backend_2"

1. start docker container

#!/bin/bash
docker run -d --name client nginx:alpine
docker run -d --privileged --security-opt seccomp=unconfined --name lb maborosiii/lb-from-scratch-rust
docker run -d --name backend_1 nginx:backend_1
docker run -d --name backend_2 nginx:backend_2

container's ip

ip	conainer name
172.17.0.2	client
172.17.0.3	lb
172.17.0.4	backend_1
172.17.0.5	backend_2

start test

enter client container

$ docker exec -it client sh
$ curl 172.17.0.3 (lb ip)

watch the result which print "backend_1" or "backend2" also watch the output from lb

[2024-08-31T07:26:56Z INFO  lb_from_scratch_rust] before eth addr 2:42:ac:11:0:2 -> 2:42:ac:11:0:3
[2024-08-31T07:26:56Z INFO  lb_from_scratch_rust] SRC IP: 172.17.0.3, DST IP: 172.17.0.4
[2024-08-31T07:26:56Z INFO  lb_from_scratch_rust] after eth addr 2:42:ac:11:0:3 -> 2:42:ac:11:0:4
[2024-08-31T07:26:56Z INFO  lb_from_scratch_rust] before eth addr 2:42:ac:11:0:4 -> 2:42:ac:11:0:3
[2024-08-31T07:26:56Z INFO  lb_from_scratch_rust] SRC IP: 172.17.0.3, DST IP: 172.17.0.2
[2024-08-31T07:26:56Z INFO  lb_from_scratch_rust] after eth addr 2:42:ac:11:0:3 -> 2:42:ac:11:0:2
[2024-08-31T07:26:56Z INFO  lb_from_scratch_rust] before eth addr 2:42:ac:11:0:2 -> 2:42:ac:11:0:3
[2024-08-31T07:26:56Z INFO  lb_from_scratch_rust] SRC IP: 172.17.0.3, DST IP: 172.17.0.5
[2024-08-31T07:26:56Z INFO  lb_from_scratch_rust] after eth addr 2:42:ac:11:0:3 -> 2:42:ac:11:0:5
[2024-08-31T07:26:56Z INFO  lb_from_scratch_rust] before eth addr 2:42:ac:11:0:5 -> 2:42:ac:11:0:3
[2024-08-31T07:26:56Z INFO  lb_from_scratch_rust] SRC IP: 172.17.0.3, DST IP: 172.17.0.2
[2024-08-31T07:26:56Z INFO  lb_from_scratch_rust] after eth addr 2:42:ac:11:0:3 -> 2:42:ac:11:0:2
[2024-08-31T07:26:56Z INFO  lb_from_scratch_rust] before eth addr 2:42:ac:11:0:2 -> 2:42:ac:11:0:3
[2024-08-31T07:26:56Z INFO  lb_from_scratch_rust] SRC IP: 172.17.0.3, DST IP: 172.17.0.5

NOTE

this project just work in xdp generic mode, cannot work in xdp native mode

use XdpFlags::SKB_MODE instead of XdpFlags::default() and XdpFlags::DRV_MODE in aya user program