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bal-man

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git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1729721 13f79535-47bb-0310-9956-ffa450edef68
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Jim Jagielski
2016-02-10 20:39:28 +00:00
parent bb00d6d078
commit 45f7b85cd3
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55
docs/manual/howto/reverse_proxy.xml
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@@ -216,4 +216,59 @@ ProxyPassReverse "/images" "balancer://myset"
</section>
<section id="manager">
<title>Balancer Manager</title>
<p>
One of the most unique and useful features of Apache httpd's reverse proxy is
the embedded <em>balancer-manager</em> application. Similar to
<module>mod_status</module>, <em>balancer-manager</em> displays
the current working configuration and status of the enabled
balancers and workers currently in use. However, not only does it
display these parameters, it also allows for dynamic, runtime, on-the-fly
reconfiguration of almost all of them, including adding new <em>BalancerMembers</em>
(workers) to an existing balancer. To enable these capability, the following
needs to be added to your configuration:
</p>
<highlight language="config">
&lt;Location "/balancer-manager"&gt;
SetHandler balancer-manager
Require host localhost
&lt;/Location&gt;
</highlight>
<note type="warning"><title>Warning</title>
<p>Do not enable the <em>balancer-manager</em> until you have <a
href="mod_proxy.html#access">secured your server</a>. In
particular, ensure that access to the URL is tightly
restricted.</p>
</note>
<p>
When the reverse proxy server is accessed at that url
(eg: <code>http://rproxy.example.com/balancer-manager/</code>, you will see a
page similar to the below:
</p>
<p><img src="../images/bal-man.png" alt="balancer-manager page" /></p>
<p>
This form allows the devops admin to adjust various parameters, take
workers offline, change load balancing methods and add new works. For
example, clicking on the balancer itself, you will get the following page:
</p>
<p><img src="../images/bal-man-b.png" alt="balancer-manager page" /></p>
<p>
Whereas clicking on a worker, displays this page:
</p>
<p><img src="../images/bal-man-w.png" alt="balancer-manager page" /></p>
<p>
To have these changes persist restarts of the reverse proxy, ensure that
<directive module="mod_proxy">BalancerPersist</directive> is enabled.
</p>
</section>
</manualpage>