haproxy
/
tmp

每个机器的ip地址：
1、The ip address of each machine：
client ip: 19.182.211.230
haproxy server ip:
eth0 19.182.251.91
eth1 19.182.173.96
http server ip: 19.182.182.149

2、haproxy server config:

echo '19.182.182.149 web1' >> /etc/hosts

cat /etc/haproxy/haproxy.cfg
global
    log         127.0.0.1 local0
    chroot      /var/lib/haproxy
    pidfile     /var/run/haproxy.pid
    daemon
    maxconn     4000

defaults
    mode                    http
    log                     global
    option                  httplog
    retries                 3
    option  dontlognull
    option redispatch
    timeout connect      5000ms
    timeout client     50000ms
    timeout   server   50000ms
    maxconn                 3000
    default-server source 19.182.173.96 interface eth1

frontend main
    bind *:80
    default_backend         http_back

backend http_back
    balance     roundrobin
    server web1 19.182.182.149:80 cookie node1 check

3、19.182.182.149 http server config:
启动80端口http服务(Start the http service on port 80 in the background)
python3 -m http.server 80&

echo '19.182.251.91 haproxy_server' >> /etc/hosts

4、client config(add haproxy service map):
echo '19.182.251.91 haproxy_server' >> /etc/hosts


#The above is configured to access the haproxy service via curl
curl haproxy_server
<html><body><h1>503 Service Unavailable</h1>
No server is available to handle this request.
</body></html>


b7ff822合入后，配置了一个简单haproxy服务，'interface'参数生效('source' subargument)，连接不到http服务器，但eth0不会报错。
After b7ff822 merged in, configured a simple haproxy service with the 'interface' parameter in effect ('source' subargument), can't connect to the http server, but eth0 doesn't report errors.

我测试了每个haproxy版本(2.6~2.9)(修复了b7ff822)，一样的错误
I tested every haproxy version (2.6~2.9) (fixed b7ff822), same error

journalctl -xfu haproxy

Apr 29 14:28:25 haproxy_server haproxy[33180]: [WARNING]  (33180) : Server http_back/web1 is DOWN, reason: Layer4 timeout, check duration: 2002ms. 0 active and 0 backup servers left. 0 sessions active, 0 requeued, 0 remaining in queue.
Apr 29 14:28:25 haproxy_server haproxy[33180]: [ALERT]    (33180) : backend 'http_back' has no server available!