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haproxy 似乎看不到所有的后端/副本

tag-icon • tag-icon docker haproxy docker-compose
haproxy 似乎看不到所有的后端/副本

我正在尝试haproxy向多个副本发出代理请求：

docker-compose.yml：

services:
  haproxy:
    image: haproxy:2.3-alpine
    volumes:
      - ./haproxy.cfg:/usr/local/etc/haproxy/haproxy.cfg
    ports:
      - 8888:80
  app:
    build: .
    command: perl app.pl
    init: true
    deploy:
      replicas: 10

haproxy.cfg：

global
    maxconn  1024
listen in
    bind :80
    server-template srv 10 app:8080 check
    timeout connect 5000ms
    timeout client 50000ms
    timeout server 50000ms

但似乎只看到部分复制品：

$ docker compose up
...
app-3      | MyWebServer: You can connect to your server at http://localhost:8080/
haproxy-1  | [NOTICE] 094/155107 (1) : New worker #1 (8) forked
app-4      | MyWebServer: You can connect to your server at http://localhost:8080/
app-2      | MyWebServer: You can connect to your server at http://localhost:8080/
app-5      | MyWebServer: You can connect to your server at http://localhost:8080/
app-9      | MyWebServer: You can connect to your server at http://localhost:8080/
app-7      | MyWebServer: You can connect to your server at http://localhost:8080/
app-6      | MyWebServer: You can connect to your server at http://localhost:8080/
app-1      | MyWebServer: You can connect to your server at http://localhost:8080/
app-10     | MyWebServer: You can connect to your server at http://localhost:8080/
app-8      | MyWebServer: You can connect to your server at http://localhost:8080/
app-3      | d3757cd065b4
app-3      | d3757cd065b4
app-3      | d3757cd065b4
app-4      | 226419df4354
app-4      | 226419df4354
app-4      | 226419df4354
...

更多细节这里。

我错过了什么？

答案1

我不确定我理解其中的原因，但是depends_on据称可以解决问题（haproxy取决于 s app）。我猜是它在启动时haproxy缓存解析的内容。如果当时并非所有 s 都在运行，则它仅缓存正在运行的 IP。appapp

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