HAProxy JSON Body Routing Config

haproxy.cfg

global
  stats socket /var/run/api.sock user haproxy group haproxy mode 660 level admin expose-fd listeners
  log stdout format raw local0 info

defaults
  mode http
  timeout client 10s
  timeout connect 5s
  timeout server 10s
  timeout http-request 10s
  log global

frontend proxylambda
        bind localhost:4575
        
        acl runtime202206 req.body -m reg \"runtime\":.*\"2022.06\"
        use_backend node16 if runtime202206
        
        acl runtime202202 req.body -m reg \"runtime\":.*\"2022.02\"
        use_backend node14 if runtime202202
        
        acl runtime202110 req.body -m reg \"runtime\":.*\"2021.10\"
        use_backend node14 if runtime202110
        
        acl runtime202106 req.body -m reg \"runtime\":.*\"2021.06\"
        use_backend node14 if runtime202106
        
        default_backend node12
        
        option forwardfor
        
backend node12
        balance roundrobin
        server  node12  localhost:4580 check
        
backend node14
        balance roundrobin
        server  node14  localhost:4581 check
        
backend node16
        balance roundrobin
        server  node16  localhost:4582 check

Then in whichever directory you're in there,

sudo docker run -d \
   --name haproxy \
   --net mynetwork \
   -v $(pwd):/usr/local/etc/haproxy:ro \
   -p 4575:4575 \
   haproxytech/haproxy-alpine:latest

Or with docker-compose, something like this:

version: '2'

services:
  haproxy:
    image: haproxy:alpine
    container_name: haproxy
    restart: always
    depends_on:
      - node12
      - node14
      - node16
    ports:
      - "4575:4575"
    volumes:
      - haproxy.cfg:/usr/local/etc/haproxy
    networks:
      - checkly_lambda
      
   # ... node containers, etc.