Haproxy 负载均衡器在 centos7 上不起作用

Haproxy 负载均衡器在 centos7 上不起作用

我正在尝试在 centos 7 上设置 HAproxy 负载均衡器,但是我无法让它工作。从服务来看,它表示正在运行,但统计页面无法打开,也无法指向任何地方。我想做的是将其用作负载均衡器,将流量移动到受 https 保护的第一台或第二台服务器。HAproxy 本身不需要受 https 保护,目前也没有。现在我有以下配置:

#---------------------------------------------------------------------
# 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
    # to have these messages end up in /var/log/haproxy.log you will
    # need to:
    #
    # 1) configure syslog to accept network log events.  This is done
    #    by adding the '-r' option to the SYSLOGD_OPTIONS in
    #    /etc/sysconfig/syslog
    #
    # 2) configure local2 events to go to the /var/log/haproxy.log
    #   file. A line like the following can be added to
    #   /etc/sysconfig/syslog
    #
    #    local2.*                       /var/log/haproxy.log
    #
    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                    http
    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
    stats enable
        stats auth haproxy:haproxy
        stats uri /haproxy
#---------------------------------------------------------------------
# main frontend which proxys to the backends
#--------------------------------------------------------------------- frontend  front
        redirect scheme https code 301 if !{ ssl_fc }
        bind *:80
        mode http
        default_backend app
#---------------------------------------------------------------------
# static backend for serving up images, stylesheets and such
#--------------------------------------------------------------------- backend app
    mode http
    balance     roundrobin
    option forwardfor
    http-request set-header X-Forwarded-Port %[dst_port]
    http-request add-header X-Forwarded-Proto https if { ssl_fc }
    option httpchk HEAD / HTTP/1.1rnHost:localhost
    server s1 192.168.14.65:443 check
    server s2  192.168.14.200:443 check

#---------------------------------------------------------------------
# round robin balancing between the various backends
#--------------------------------------------------------------------- listen stats *:8080
        mode http
        log global
        maxconn 10
        clitimeout 100s
        srvtimeout 100s
        contimeout 100s
        timeout queue 100s

stats refresh 30s stats show-node

日志仅显示以下内容:

Aug 21 16:06:00 localhost haproxy[11177]: Proxy front started.
Aug 21 16:06:00 localhost haproxy[11177]: Proxy app started.
Aug 21 16:10:08 localhost haproxy[11275]: Proxy front started.
Aug 21 16:10:08 localhost haproxy[11275]: Proxy app started.
Aug 21 16:10:08 localhost haproxy[11275]: Proxy stats started.

... 但没有什么更有用的。当我在服务运行时访问配置文件中描述的任何 IP 地址时,我什么也得不到(超时)。

我也尝试过删除超时,但没有用。我收到了这些没有超时的消息:

Aug 21 16:52:27 localhost haproxy[11413]: Server app/s1 is DOWN, reason: Layer7 invalid response, info: "<15><03><03>", check duration: 399ms. 1 active and 0 backup servers left. 0 sessions active, 0 requeued, 0 remaining in queue.
Aug 21 16:52:28 localhost haproxy[11413]: Server app/s2 is DOWN, reason: Layer7 invalid response, info: "<15><03><03>", check duration: 227ms. 0 active and 0 backup servers left. 0 sessions active, 0 requeued, 0 remaining in queue.

有任何想法吗?

答案1

我现在让它工作了。罪魁祸首是 centos7 运行的防火墙,它阻止了我所有需要的端口。此外,我需要稍微修改一下配置,以便它能够转发到 ssh 后端。最终配置如下所示:

[root@rimilb ~]# cat /etc/haproxy/haproxy.cfg
#---------------------------------------------------------------------
# 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
    # to have these messages end up in /var/log/haproxy.log you will
    # need to:
    #
    # 1) configure syslog to accept network log events.  This is done
    #    by adding the '-r' option to the SYSLOGD_OPTIONS in
    #    /etc/sysconfig/syslog
    #
    # 2) configure local2 events to go to the /var/log/haproxy.log
    #   file. A line like the following can be added to
    #   /etc/sysconfig/syslog
    #
    #    local2.*                       /var/log/haproxy.log
    #
    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                    http
    log                     global
    option                  httplog
    option                  dontlognull
    option http-server-close
    option forwardfor       except 127.0.0.0/8
    option                  redispatch
    retries                 3
    maxconn                 3000
    stats enable
        stats auth haproxy:haproxy
        stats uri /haproxy
#---------------------------------------------------------------------
# main frontend which proxys to the backends
#---------------------------------------------------------------------
frontend  front
        bind 192.168.14.251:80
        reqadd X-Forwarded-Proto:\ http
        default_backend app
#---------------------------------------------------------------------
# static backend for serving up images, stylesheets and such
#---------------------------------------------------------------------
backend app
    balance     roundrobin
    server s1 192.168.14.65:443 weight 1 maxconn 100 check ssl verify none
    server s2  192.168.14.200:443 weight 1 maxconn 100 check ssl verify none

#---------------------------------------------------------------------
# round robin balancing between the various backends
#---------------------------------------------------------------------
listen stats *:8080
        mode http
        log global
        maxconn 10
        clitimeout 100s
        srvtimeout 100s
        contimeout 100s
        timeout queue 100s

stats refresh 30s
stats show-node

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