HAProxy负载平衡TCP流量

Question

使用HAProxy,我正在尝试(TCP)负载平衡Rserve(在TCP套接字中侦听用于调用R脚本的服务)在2个节点中的端口6311上运行.

下面是我的配置文件.当我运行HAProxy时,它的状态没有任何问题.但是当我连接到平衡节点时,低于错误.配置有什么问题？

Handshake failed: expected 32 bytes header, got -1

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

    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

#---------------------------------------------------------------------
# common defaults that all the 'listen' and 'backend' sections will
# use if not designated in their block
#---------------------------------------------------------------------
defaults
    mode                    tcp
    log                     global
    option                  httplog
    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


listen haproxy_rserve
        bind *:81
        mode tcp
        option tcplog
        timeout client  10800s
        timeout server  10800s
        balance leastconn
        server rserve1 rserveHostName1:6311
        server rserve2 rserveHostName2:6311

listen stats proxyHostName:8080
    mode http
    stats enable
    stats realm Haproxy\ Statistics 
    stats uri /haproxy_stats
    stats hide-version
    stats auth admin:password

尝试使用下面的前端后端平衡方式.结果相同.

frontend haproxy_rserve
    bind *:81
    mode tcp
    option tcplog
    timeout client  10800s
    default_backend rserve

backend rserve
    mode tcp
    option tcplog
    balance leastconn
    timeout server  10800s  
    server rserve1 rserveHostName1:6311
    server rserve2 rserveHostName2:6311 

Answer 1

经过一周的努力来解决负载均衡R,下面(完全免费/开源软件堆栈)解决方案有效.

如果有更多人提到这一点,我会发布一个关于安装到配置的详细博客.

能够通过HAProxy TCP负载均衡器使用以下配置来加载平衡来自Rserve的R脚本请求.与问题部分中的配置非常相似,但前端和后端分开.

#Load balancer stats page access at hostname:8080/haproxy_stats
listen stats <load_balancer_hostname>:8080
    mode http
    log global
    stats enable
    stats realm Haproxy\ Statistics 
    stats uri /haproxy_stats
    stats hide-version
    stats auth admin:admin@rserve

frontend rserve_frontend
    bind *:81
    mode tcp
    option tcplog
    timeout client  1m
    default_backend rserve_backend

backend rserve_backend
    mode tcp
    option tcplog
    option log-health-checks
    option redispatch
    log global
    balance roundrobin
    timeout connect 10s
    timeout server 1m   
    server rserve1 <rserve hostname1>:6311 check
    server rserve2 <rserve hostname2>:6311 check
    server rserve2 <rserve hostname3>:6311 check

关键是使用以下命令为HAproxy启用远程连接(大多数情况下没有明确的文档)

/usr/sbin/setsebool -P haproxy_connect_any 1

还要确保在Rserve中启用远程连接,并在Rserve配置文件中使用"enable remote"参数.