node.js - 负载均衡器后面的 Socket.io

Question

我在 nginx 后面使用 socket.io，它位于 azure 负载均衡器后面。然而，在客户端，我不断收到类似

的错误

WebSocket connection to 'ws://**********/socket.io/?    session_id=i9bk_iqkVrUveKwvIBz4fMNDbkoYuaITQ_APO73sgQd6-tQBaRkjp8RR8N9LTA5LnqMeKXzZg5AXXgjEevFKqSKRJJI8iaK3&id=dc978ae038af4746baf68ead35d182f4&EIO=3&transport=websocket&sid=61LGLpdw53xaMYqBAAJR' failed: Error during WebSocket handshake: Unexpected response code: 502

nginx 也给出了以下错误

[error] 15348#0: *84812 upstream prematurely closed connection while reading response header from upstream, client: 10.100.50.14, server: _, request: "GET /prod/socket.io/?session_id=nR0P30IDeUutoavDyjcqAQ8hUw_3l7dtAHQ3tqzW4zVT8eBOxwbHZq_7mWd9K7qRNO2Aq45QXm8w2KSvzyFlq3O4w7P2tl2q&id=955bb63a4f804b42b9d85ac8cf9172a7&EIO=3&transport=websocket&sid=xXGRnAsjKX6Gj-SAAAls HTTP/1.1", upstream: "http://127.0.0.1:3000/socket.io/?session_id=nR0P30IDeUutoavDyjcqAQ8hUw_3l7dtAHQ3tqzW4zVT8eBOxwbHZq_7mWd9K7qRNO2Aq45QXm8w2KSvzyFlq3O4w7P2tl2q&id=955bb63a4f804b42b9d85ac8cf9172a7&EIO=3&transport=websocket&sid=xXGRnAsjKX6Gj-SAAAls"

有人知道原因吗？

Nginx 配置:

proxy_pass http://lb-prod/; # Load balance the URL location "/" to the upstream lb1
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection 'upgrade';
proxy_set_header Host $host;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

Answer 1

这里的问题是关于 session 粘性的。配置我的负载均衡器以使用粘性 session 解决了问题!