here we keep HTTP for websocket initialization then point to the NodeJS apps directly for the websocket sessions
frontend https-in
...
# vhosts
acl host_checkwss hdr(host) -i checkwss.nethence.com
# wss check
acl is_upgrade hdr(Connection) -i upgrade
acl is_websocket hdr(Upgrade) -i websocket
use_backend web if host_checkwss !is_upgrade !is_websocket
use_backend wss if host_checkwss is_upgrade is_websocket
backend web
balance roundrobin
server web1 web1:80 check
server web2 web2:80 check
server web3 web3:80 check
backend wss
balance roundrobin
server web1wss web1:4000 cookie web1wss
server web2wss web2:4000 cookie web2wss
server web3wss web3:4000 cookie web3wss
you could also point to the same port and let NGINX do the job, as follows.
# wss - beware NO TRAILING-SLASH
location / {
proxy_pass http://127.0.0.1:4000;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
proxy_set_header Host $host;
proxy_cache_bypass $http_upgrade;
}
wscat -c wss://checkwss.nethence.com/ check1 wscat -c wss://checkwss.nethence.com/ check2 wscat -c wss://checkwss.nethence.com/ check3 wscat -c wss://checkwss.nethence.com/ check4
WebSocket https://en.wikipedia.org/wiki/WebSocket
The WebSocket Protocol https://datatracker.ietf.org/doc/html/rfc6455
ws { auto | h1 | h2 } https://cbonte.github.io/haproxy-dconv/2.4/configuration.html#ws
Websockets Load Balancing with HAProxy https://www.haproxy.com/blog/websockets-load-balancing-with-haproxy/
Scaling and Securing WebSockets with HAProxy https://infohubblog.com/scaling-and-securing-websockets-with-haproxy.html
haproxy=2.4.3: Websockets do not work on http/2 capable backends #1364 https://github.com/haproxy/haproxy/issues/1364
Support for Websockets with HTTP/2 to the backend #162 https://github.com/haproxy/haproxy/issues/162
NGINX as a WebSocket Proxy https://www.nginx.com/blog/websocket-nginx/
How to Configure Nginx as Reverse Proxy for WebSocket https://www.tutorialspoint.com/how-to-configure-nginx-as-reverse-proxy-for-websocket
How to Configure NGINX to Proxy WebSockets https://www.serverlab.ca/tutorials/linux/web-servers-linux/how-to-configure-nginx-for-websockets/
WebSockets and Node.js - testing WS and SockJS by building a web app https://ably.com/blog/web-app-websockets-nodejs
Integration testing WebSocket server in Node.JS https://medium.com/@basavarajkn/integration-testing-websocket-server-in-node-js-2997d107414c
WebSocket with NodeJS – Quick Getting Started Guide https://www.piesocket.com/blog/nodejs-websocket/ –> the one I used
How to test node.js websocket server? https://stackoverflow.com/questions/21293311/how-to-test-node-js-websocket-server
How to force CURL to ask for http/1.1? Or maybe there’s another issue, not sure https://stackoverflow.com/questions/41894411/how-to-force-curl-to-ask-for-http-1-1-or-maybe-theres-another-issue-not-sure
wscat https://github.com/websockets/wscat