Question

我目前有一个HAproxy负载均衡器设置，带有2个后端，总共3个网站。其中一个网站需要一个额外的服务器（一个新的后端，后端＃3），但其他人不必使用这个后端。有没有办法做到这一点？可悲的是，我无法使用文档来解决这个问题。配置补充。新的后端将是.77。谢谢！

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Answer 1

关于“后端”一词的说明：您在问题中使用它来描述将转发请求的服务。为避免混淆，我将在backend处使用server，backend将成为一组server（以匹配HAProxy术语）。

您需要两个frontend块，一个带有两个frontend www-http [...] acl host_website3 hdr(host) -i website3.com # match the new website use_backend www-backend-with3 if host_website3 # send it to the correct backend default_backend www-backend backend www-backend redirect scheme https if !{ ssl_fc } cookie SERVERID insert indirect nocache server www-1 192.168.3.75:80 check cookie www-1 server www-2 192.168.3.74:80 check cookie www-2 backend www-backend-with3 # new backend here redirect scheme https if !{ ssl_fc } cookie SERVERID insert indirect nocache server www-1 192.168.3.75:80 check cookie www-1 server www-2 192.168.3.74:80 check cookie www-2 server www-3 192.168.3.77:80 check cookie www-3 # with a new server here，另一个带有三个OK: Searching for <allow-access-from> in policy files to authorize data loading from resource at https://foo.com/flash/flash.swf by requestor from http://bar.com/flash/old.swf OK: Searching for <allow-access-from> in policy files to authorize data loading from resource at https://foo.com/flash/flash.swf by requestor from http://bar.com/flash/old.swf OK: Policy file accepted: https://foo.com/crossdomain.xml OK: Request for resource at https://foo.com/flash/flash.swf by requestor from http://bar.com/flash/old.swf is permitted due to policy file at https://foo.com/crossdomain.xml。在OK: Searching for <allow-access-from> in policy files to authorize data loading from resource at https://foo.com/flash/flash.swf by requestor from http://bar.com/flash/new.swf OK: Searching for <allow-access-from> in policy files to authorize data loading from resource at https://foo.com/flash/flash.swf by requestor from http://bar.com/flash/new.swf Warning: [strict] Policy file requested from https://foo.com/crossdomain.xml redirected to https://foo.com/crossdomain.xml; will use final URL in determining scope. See http://www.adobe.com/go/strict_policy_files if this causes problems. OK: Policy file accepted: https://foo.com/crossdomain.xml Error: Request for resource at https://foo.com/flash/flash.swf by requestor from http://bar.com/flash/new.swf is denied due to lack of policy file permissions.中，使用主机名选择正确的名称：

<?xml version="1.0"?>
<!DOCTYPE cross-domain-policy SYSTEM "http://www.adobe.com/xml/dtds/cross-domain-policy.dtd">
<cross-domain-policy>
<site-control permitted-cross-domain-policies="all"/>
<allow-access-from domain="*" secure="false"/>
<allow-http-request-headers-from domain="*" headers="*" secure="false"/>
</cross-domain-policy>

HAProxy：多个网站，但其中只有一个需要使用所有后端

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