apache mod proxy balancer with websockets

Question

我有uWSGI + Apache，具有以下apache配置：

RewriteEngine On
RewriteCond %{HTTP:Upgrade} =websocket [NC]
RewriteRule /(.*)           ws://127.0.0.1:3031/$1 [P,L]
RewriteCond %{HTTP:Upgrade} !=websocket [NC]
RewriteRule /(.*)           http://127.0.0.1:3031/$1 [P,L]
ProxyPass / http://127.0.0.1:3031/

现在我想实现粘性会话，并使 apache 为每个工作线程使用代理平衡器：

<Proxy "balancer://uwsgiworkers">
    BalancerMember "http://127.0.0.1:3031" route=1
    BalancerMember "http://127.0.0.1:3032" route=2
    BalancerMember "http://127.0.0.1:3033" route=3
    ProxySet stickysession=ROUTEID
    ProxySet lbmethod=byrequests
</Proxy> 
RewriteEngine On
RewriteCond %{HTTP:Upgrade} =websocket [NC]
RewriteRule /(.*)           ws://??????/$1 [P,L]
RewriteCond %{HTTP:Upgrade} !=websocket [NC]
RewriteRule /(.*)           http://???????/$1 [P,L]
ProxyPass balancer://uwsgiworkers/

现在的问题是如何传递给RewriteRule选定的工作线程 URL？因为我需要更改 WebSockets 握手中的协议。

谢谢！

Answer 1

我最近偶然发现了同样的问题。我不是 100% 确定这是正确的道路(而且感觉很冗长(，但它似乎是一个功能性选项！

基本上，我创建了两个不同的平衡器组，一个用于 HTTP 流量，一个用于 WebSocket。我不太确定是否可以在这里省略ProxyPass(似乎balancer://负责 ProxyPass 部分(，但它似乎在我的环境中运行良好！

<Proxy "balancer://uwsgiworkers">
    BalancerMember "http://127.0.0.1:3031" route=1
    BalancerMember "http://127.0.0.1:3032" route=2
    BalancerMember "http://127.0.0.1:3033" route=3
    ProxySet stickysession=ROUTEID
    ProxySet lbmethod=byrequests
</Proxy> 
<Proxy "balancer://uwsgiworkersws">
    BalancerMember "ws://127.0.0.1:3031" route=1
    BalancerMember "ws://127.0.0.1:3032" route=2
    BalancerMember "ws://127.0.0.1:3033" route=3
    ProxySet stickysession=ROUTEID
    ProxySet lbmethod=byrequests
</Proxy> 
RewriteEngine On
RewriteCond %{HTTP:Upgrade} =websocket [NC]
RewriteRule /(.*)           balancer://uswsgiworkersws/$1 [P,L]
RewriteCond %{HTTP:Upgrade} !=websocket [NC]
RewriteRule /(.*)           balancer://uswsgiworkers/$1 [P,L]
# I actually think this can be omitted
# it seems that balancer:// handles the ProxyPass
# ProxyPass balancer://uwsgiworkers/

这个想法的功劳：https://serverfault.com/a/808640/437243