Load-balancing-Socket.Io-NodeJs

Load balancing Socket.Io NodeJs - Solution 1

This Works fine for sticky session / ip_hash Load balance with Nginx.

Dependencies

• dotenv
• express
• redis
• socket.io
• socket.io-redis

Solution 1

We are using Redis and socket.io-redis adapter to loadbalance, which works perfectly when used with sticky session / ip_hash Load balance with Nginx.

Works With

• Sticky Session
• ip_hash load balance with Nginx.

I have discussed about the solution here, Load Balancing Node.js Application #Socket.io

We have solution_1.conf Nginx configuration file, which will loadbalance the requests comming on http://socket.node to http://localhost:4010 and http://localhost:4011.

So, to first to make socket.node host available add

127.0.1.3 socket.node

on /etc/hosts, just as on the etc-hosts file

Then create solution_1.conf (or any name) and add this content there

upstream sbackend {
    ip_hash;
    server localhost:4010;
    server localhost:4011;
}

server { 
    server_name socket.node;
    location / {
        proxy_pass http://sbackend;
        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;
    }
}

just as in solution_1.conf file.

Now, let’s start the node server on two port.

first with port 4010

second with port 4011

Cannot be verified locally, since IP hash will always forward you to the same instance of node server