docker-compose.yml

version: "3.9"
services:

  load-balancer:
    image: "load-balancer:latest"
    environment:
      - LOAD_BALANCER_SERVER_LIST=[
        {"ip":"http://host.docker.internal:${ECHO_SERVER_PORT_1}", "weight":5},
        {"ip":"http://host.docker.internal:${ECHO_SERVER_PORT_2}", "weight":3},
        {"ip":"http://host.docker.internal:${ECHO_SERVER_PORT_3}", "weight":1}]
    ports:
      - "8080:8080"

  echo-server-1:
    image: "echo-server:latest"
    environment:
      - ECHO_SERVER_PORT=${ECHO_SERVER_PORT_1}
      - ECHO_SERVER_ID=${ECHO_SERVER_ID_1}
    ports:
      - "${ECHO_SERVER_PORT_1}:${ECHO_SERVER_PORT_1}"
  echo-server-2:
    image: "echo-server:latest"
    environment:
      - ECHO_SERVER_PORT=${ECHO_SERVER_PORT_2}
      - ECHO_SERVER_ID=${ECHO_SERVER_ID_2}
    ports:
      - "${ECHO_SERVER_PORT_2}:${ECHO_SERVER_PORT_2}"
  echo-server-3:
    image: "echo-server:latest"
    environment:
      - ECHO_SERVER_PORT=${ECHO_SERVER_PORT_3}
      - ECHO_SERVER_ID=${ECHO_SERVER_ID_3}
    ports:
      - "${ECHO_SERVER_PORT_3}:${ECHO_SERVER_PORT_3}"