最近打算正式使用websocket，需要做负载，而使用的是apache http server，捣腾了一天找到了一种比较靠谱的方式，特此记录一下。

加载的模块如下：

LoadModule proxy_module modules/mod_proxy.so
LoadModule proxy_connect_module modules/mod_proxy_connect.so
LoadModule proxy_http_module modules/mod_proxy_http.so
LoadModule proxy_wstunnel_module modules/mod_proxy_wstunnel.so
LoadModule proxy_balancer_module modules/mod_proxy_balancer.so
LoadModule rewrite_module modules/mod_rewrite.so
LoadModule proxy_express_module modules/mod_proxy_express.so

不排除有遗漏，因为我这边全部加载的，只去除了几个不需要的。

conf/http.conf中需要加入或者删除注释：

Include conf/extra/httpd-vhosts.conf

conf/extra/httpd-vhosts.conf配置：

<VirtualHost *:8088>ServerAdmin webmaster@dummy-host.bigdata.comServerName localhostErrorLog "logs/bigdata.com-error_log"CustomLog "logs/bigdata.com-access_log" commonProxyRequests OffHeader add Set-Cookie "ROUTEID=.%{BALANCER_WORKER_ROUTE}e; path=/" env=BALANCER_ROUTE_CHANGED# websocketRewriteEngine On RewriteCond %{HTTP:Connection} Upgrade [NC]RewriteCond %{HTTP:Upgrade} websocket [NC]RewriteRule /(.*)           balancer://proxy2/$1 [P,QSA,L]Proxypass /bigdata balancer://proxy#stickysession=JSESSIONID|jsessionid nofailover=OnProxyPassReverse /bigdata balancer://proxy#ProxyPassReverseCookiePath /bigdata /bigdata<Proxy balancer://proxy2>Order Deny,AllowAllow from allRequestHeader set Connection "Upgrade"RequestHeader set Upgrade "websocket"   BalancerMember ws://10.214.136.181:8080 loadfactor=2 route=work89BalancerMember ws://10.214.136.180:8080 loadfactor=1 route=work90ProxySet stickysession=ROUTEID</Proxy><Proxy balancer://proxy>Order Deny,AllowAllow from allBalancerMember http://10.214.136.180:8080/bigdata loadfactor=2 route=work89BalancerMember http://10.214.136.180:8080/bigdata loadfactor=1 route=work90ProxySet stickysession=ROUTEID</Proxy></VirtualHost>

根据头信息是否是websocket来重写url。