HaProxy Configuration file

问题

I have 2 springboot applications running on ports 9000 and 9001. I have also run HaProxy using a docker container. My config file is as follows:

global

defaults
    mode http
    timeout connect 5000ms
    timeout client 5000ms
    timeout server 5000ms

frontend http-in
    bind *:80

    acl has_web1 path_beg /web1
    acl has_web2 path_beg /web2

    use_backend web1 if has_web1 
    use_backend web2 if has_web2 

    default_backend web1

backend web1
    server web1 127.0.0.1:9000 check 

backend web2
    server web2 127.0.0.1:9001 check

When I try to access a url, say localhost/web1, it is giving error code 503.

Can someone tell me why is it like this? The docker compose file is:

version: '3'
services:
  #web1:
  #  image: dockercloud/hello-world
  #  container_name: web1
  #  ports:
  #    - "81:80"

  #web2:
  #  image: dockercloud/hello-world
  #  container_name: web2
  #  ports:
  #    - "82:80"    

  haproxy:
    build: ./haproxy
    container_name: haproxy
    ports:
      - "80:80"

And the Dockerfile is:

FROM haproxy:1.7

COPY haproxy.cfg /usr/local/etc/haproxy/haproxy.cfg

I am working on Windows, if that matters.

Edit: I switched the version of HaProxy to 2.1.2 and got the following warnings:

haproxy    | [NOTICE] 020/002817 (1) : New worker #1 (6) forked
haproxy    | [WARNING] 020/002817 (6) : Server web1/web1 is DOWN, reason: Layer4 connection problem, info: "Connection refused", check duration: 0ms. 0 active and 0 backup servers left. 0 sessions active, 0 requeued, 0 remaining in queue.
haproxy    | [ALERT] 020/002817 (6) : backend 'web1' has no server available!
haproxy    | [WARNING] 020/002818 (6) : Server web2/web2 is DOWN, reason: Layer4 connection problem, info: "Connection refused", check duration: 0ms. 0 active and 0 backup servers left. 0 sessions active, 0 requeued, 0 remaining in queue.
haproxy    | [ALERT] 020/002818 (6) : backend 'web2' has no server available!

Is it because of the docker container?? I am running it using the commaand

docker-compose up --build

Edit:

Changed my docker compse file to this:

version: '3'
services:
  #web1:
  #  image: dockercloud/hello-world
  #  container_name: web1
  #  ports:
  #    - "81:80"

  #web2:
  #  image: dockercloud/hello-world
  #  container_name: web2
  #  ports:
  #    - "82:80"    
  haproxy:
    build: ./haproxy
    container_name: haproxy
    ports:
      - "80:80"
    extra_hosts:
      - "dockerhost:<My IP>"

and config file to this:

global

defaults
    mode http
    timeout connect 5000ms
    timeout client 5000ms
    timeout server 5000ms

frontend http-in
    bind *:80

    acl has_web1 path_beg /web1
    acl has_web2 path_beg /web2

    use_backend web1 if has_web1 
    use_backend web2 if has_web2 

    default_backend web1

backend web1
    server web1 dockerhost:9000 check 

backend web2
    server web2 dockerhost:9001 check

Now the errors are gone, but I'm able to access only localhost, not localhost/web1, localhost/web2 or any other. But the backends are being formed as there is no error or warning in the console. The error code I'm getting is 404.

来源：https://stackoverflow.com/questions/59947463/haproxy-configuration-file

标签

Spring

spring-boot

load-balancing

HAproxy