Digital Ocean 上的负载平衡 Websocket答案

【问题标题】：Load Balancing Websockets on Digital OceanDigital Ocean 上的负载平衡 Websocket
【发布时间】：2018-12-24 19:48:57
【问题描述】：

我正在尝试配置 Digital Ocean 本地负载均衡器以分配 websockets 流量。我定了规则：

在尝试通过负载均衡器连接时，我得到： VM915:1 WebSocket connection to 'ws://{loadbalancerip}:8443/' failed: Connection closed before receiving a handshake response.

直接连接就可以了。

那么如何配置负载均衡器来平衡 websockets 流量？

【问题讨论】：

你能成功吗？我遇到了同样的问题。

标签： tcp websocket load-balancing digital-ocean

【解决方案1】：

看起来 Digital Ocean Load Balancer 不支持开箱即用的 websocket，我不得不购买一个小型实例并在其上配置 Nginx 以平衡 3 台本地机器之间的传入流量.

这是 Nginx 的可能配置，它允许您平衡从 Cloudflare 转发到 8443 端口的 wss 流量：

upstream wss {
# Clients with the same IP are redirected to the same backend
# ip_hash;
# Available backend servers
server 228.228.228.1:8443 max_fails=3 fail_timeout=30s;
server 228.228.228.2:8443 max_fails=3 fail_timeout=30s;
server 228.228.228.3:8443 max_fails=3 fail_timeout=30s;
}

server {
listen 8443 ssl default_server;
listen 443 ssl default_server;
listen [::]:8443 ssl default_server;
include snippets/self-signed.conf;
include snippets/ssl-params.conf;
underscores_in_headers on;

root /var/www/html;

index index.html index.htm index.nginx-debian.html;

server_name _;


    location / {
        # switch off logging
        access_log off;
        try_files $uri $uri/ =404;

        # redirect all HTTP traffic to wss
        proxy_pass https://wss;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_pass_request_headers      on; 
        proxy_set_header Host $host;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header HTTP_CF_IPCOUNTRY $http_cf_ipcountry;

        # WebSocket support (nginx 1.4)
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";

        # Path rewriting
        rewrite /wss/(.*) /$1 break;
        proxy_redirect off;

    }
}

【讨论】：