HAproxy

Dockerfile

+FROM openjdk:11-jre-slim
+
+COPY server2.jar /app/server2.jar
+
+CMD ["java", "-jar", "/app/server2.jar"]
\ No newline at end of file

docker-compose.yml

+version: '3'
+
+services:
+  haproxy:
+    image: haproxy:latest
+    volumes:
+      - ./haproxy.cfg:/usr/local/etc/haproxy/haproxy.cfg:ro
+    networks:
+      - my_network
+    ports:
+      - "80:7070"
+
+  server1:
+    build:
+      context: .
+      dockerfile: server1/Dockerfile
+    networks:
+      - my_network
+
+  server2:
+    build:
+      context: .
+      dockerfile: server2/Dockerfile
+    networks:
+      - my_network
+
+networks:
+  my_network:

haproxy.cfg

+global
+    log stdout format raw local0
+
+defaults
+    log global
+    mode http
+    timeout connect 5000ms
+    timeout client  50000ms
+    timeout server  50000ms
+
+frontend http-in
+    bind *:7070
+    default_backend servers
+
+backend servers
+    balance roundrobin
+    server server1 server1:8080 check
+    server server2 server2:9090 check