apache http服务器负载均衡器监视

Question

我将apache http服务器配置为使用mod-代理模块充当负载均衡器。

<Proxy balancer://clusterABCD>
    BalancerMember http://192.168.0.222:8080/geoserver/wms loadfactor=8
    BalancerMember http://192.168.0.14:8081/geoserver/wms loadfactor=8
    BalancerMember http://192.168.0.222:8082/geoserver/wms status=+H
    ProxySet lbmethod=bytraffic
    Order allow,deny
    Allow from all
</Proxy>

ProxyPass /LGroup balancer://clusterABCD/

有什么方法可以监视负载平衡器的功能吗？

我的问题是

1. 有什么方法可以找到请求从哪个BalanceMember中处理？
2. 是否有任何可用于增加功能的设置？

预先谢谢

Answer 1

为了回答您的两个问题，这是可能的，但您需要通过Mod代理增强Apache负载平衡的配置，以使此功能可用。

我建议您使用下面的示例设置：

<VirtualHost *:80>
ProxyRequests off

ServerName servername.local

<Proxy balancer://mycluster>
        # TomcatA
        BalancerMember http://172.20.20.101:8080 route=tomcatA
        # TomcatB
        BalancerMember http://172.20.20.102:8080 route=tomcatB
        # TomcatC
        BalancerMember http://172.20.20.103:8080 route=tomcatC


        # Security – to determine who is allowed to access
        # Currently all are allowed to access
        Order Deny,Allow
        Deny from none
        Allow from all

        # Load Balancer Settings
        # We will be configuring a simple Round
        # Robin style load balancer.  This means
        # that all nodes take an equal share of
        # of the load.
        ProxySet lbmethod=byrequests

</Proxy>

# balancer-manager
# This tool is built into the mod_proxy_balancer
# module and will allow you to do some simple
# modifications to the balanced group via a gui
# web interface.
<Location /balancer-manager>
        SetHandler balancer-manager

        # I recommend locking this one down to your
        # administering location
        Order deny,allow
        Allow from all
</Location>

# Point of Balance
# This setting will allow to explicitly name the
# location in the site that we want to be
# balanced, in this example we will balance "/"
# or everything in the site.
ProxyPass /balancer-manager !
ProxyPass / balancer://mycluster/ stickysession=JSESSIONID|jsessionid nofailover=Off scolonpathdelim=On

​

要查看余额请求，需要有模块

mod_proxy_balancer

安装，然后使用上面的配置。

关于可用性，它取决于负载均衡器设置- Round方法-在节点之间平等地共享通信量，并且被认为可能是可用性的最佳选择：

ProxySet lbmethod=byrequests

另外，如果您正在考虑将会话从Apache共享到app服务器，则需要配置AJP而不是HTTP端口，以及应用程序服务器(如Tomcat)上所需的更改。详情可在以下网址查阅：

负载平衡: Apache与物理设备

Answer 2

可能太简单了，但是监视平衡器成员的(访问)日志又如何呢？这应该会告诉您，哪个成员正在处理请求。