向haproxy中的默認服務器或其他服務器請求redispatch請求？

Question

我正在爲我的tomcats配置haproxy，我有兩個後端組，第一個後端在循環方法中有兩個tomcat和服務請求，其他後端只有一個tomcat。現在我想如果請求發送到第二個返回並且它已關閉，請求應該重新分派到其他後端的服務器。我正在使用此配置。

#--------------------------------------------------------------------- 
# Example configuration for a possible web application. See the 
# full configuration options online. 
# 
# http://haproxy.1wt.eu/download/1.4/doc/configuration.txt 
# 
#--------------------------------------------------------------------- 

#--------------------------------------------------------------------- 
# Global settings 
#--------------------------------------------------------------------- 
global 
    log   127.0.0.1 local0 
    chroot  /var/lib/haproxy 
    pidfile  /var/run/haproxy.pid 
    maxconn  4000 
    user  haproxy 
    group  haproxy 
    daemon 

    # turn on stats unix socket 
    stats socket /var/lib/haproxy/stats 
    stats socket /var/run/haproxy.sock level admin 

#--------------------------------------------------------------------- 
# common defaults that all the 'listen' and 'backend' sections will 
# use if not designated in their block 
#--------------------------------------------------------------------- 
defaults 
    mode     http 
    log      global 
    option     httplog 
    option     dontlognull 
    option http-server-close 
    option forwardfor  except 127.0.0.0/8 
    retries     3 
    timeout http-request 600s 
    timeout queue   1m 
    timeout connect   10s 
    timeout client   1m 
    timeout server   1m 
    timeout http-keep-alive 15s 
    timeout check   5s 
    maxconn     2000 

frontend nginx 
    bind *:5000 
    mode http 
    acl tomcat1 path_beg -i /dologin 
    acl tomcat2 path_beg -i /mobileapp 
    default_backend backend_tomcat1 
    use_backend backend_tomcat1 if tomcat1 
    use_backend backend_tomcat2 if tomcat2 

backend backend_tomcat1 
    mode http 
    balance roundrobin 
    server tomcat01 X.X.X.X:8080 check inter 2000 
    server tomcat03 X.X.X.X:8080 check inter 2000 

backend backend_tomcat2 
    mode http 
    option persist 
    option redispatch 
    server tomcat02 X.X.X.X:8080 check inter 2000 

listen stats *:1936 
    stats enable 
    stats refresh 2s 
    stats uri/
    stats hide-version 
    stats auth admin:admin 
    stats admin if TRUE 

誰能幫助我，我在做什麼錯在這裏

Answer 1

你可以嘗試在規則添加第二個條件發送請求到第二後端，這是檢查backcend2的服務器狀態，然後設置默認後端。

更多信息：http://cbonte.github.io/haproxy-dconv/configuration-1.5.html#7.3.2-srv_is_up

frontend nginx 
    bind *:5000 
    mode http 
    acl tomcat1 path_beg -i /dologin 
    acl tomcat2 path_beg -i /mobileapp 
    acl is_alive srv_is_up(backend_tomcat2/tomcat02) 
    use_backend backend_tomcat1 if tomcat1 
    use_backend backend_tomcat2 if tomcat2 is_alive 
    default_backend servers tomcat1