haproxy - Layer4 "Connection refused"带haproxy

Question

我需要一些关于如何设置的建议 haproxy .我有两个网络服务器正在运行。为了测试，他们在端口 8080 上运行了一个简单的节点服务器。

现在在我的 haproxy 服务器上，我启动了 haproxy，它给了我以下内容:

$> /usr/sbin/haproxy -f /etc/haproxy/haproxy.cfg 
[WARNING] 325/202628 (16) : Server node-backend/server-a is DOWN, reason: Layer4 connection problem, info: "Connection refused", check duration: 0ms. 1 active and 0 backup servers left. 0 sessions active, 0 requeued, 0 remaining in queue.
[WARNING] 325/202631 (16) : Server node-backend/server-b is DOWN, reason: Layer4 timeout, check duration: 2001ms. 0 active and 0 backup servers left. 0 sessions active, 0 requeued, 0 remaining in queue.
[ALERT] 325/202631 (16) : backend 'node-backend' has no server available!

只有一个注意事项:如果我这样做:

haproxy$> wget server-a:8080

我从节点服务器得到响应。

这是我的 haproxy.cfg:

#---------------------------------------------------------------------  
# Global settings
#---------------------------------------------------------------------
global
    log         127.0.0.1 local2

    chroot      /var/lib/haproxy
    pidfile     /var/run/haproxy.pid
    maxconn     4000
    user        haproxy
    group       haproxy

    stats socket /var/lib/haproxy/stats

#---------------------------------------------------------------------
# common defaults that all the 'listen' and 'backend' sections will
# use if not designated in their block
#---------------------------------------------------------------------
defaults
    mode                    tcp
    log                     global
    option                  tcplog
    option                  dontlognull
    option http-server-close
#   option forwardfor       except 127.0.0.0/8
    option                  redispatch
    retries                 3
    timeout http-request    10s
    timeout queue           1m
    timeout connect         10s
    timeout client          1m
    timeout server          1m
    timeout http-keep-alive 10s
    timeout check           10s
    maxconn                 3000

#---------------------------------------------------------------------
# main frontend which proxys to the backends
#---------------------------------------------------------------------
frontend  www
    bind                        *:80
    default_backend             node-backend

#---------------------------------------------------------------------
# round robin balancing between the various backends
#--------------------------------------------------------------------
backend node-backend
   balance roundrobin
   mode tcp
   server server-a 172.19.0.2:8080 check
   server server-b 172.19.0.3:8080 check

如果我删除 check选项似乎有效。我有什么建议可以修复haproxy的这种检查机制吗？

Answer 1

您需要在命令的帮助下获取服务器的确切 IP 地址

ifconfig

并在您的 haproxy.cfg 中更正以下地址文件:

172.19.0.2:8080
172.19.0.3:8080 

或修改如下行

server server-a server-a:8080 check
server server-b server-b:8080 check