CODEWITHSUNDEEP
nginxload-balancing
Yasothar
Yasothar

Reputation: 453

Nginx load balancer configuration

My requirement is to load balance two ESB web services running in two separate nodes (10.110.6.29, 10.110.6.45) I'm using nginx and is installed in 10.110.6.45. Basically when I send a request to 10.110.6.45 (port 80) it should be equally load balanced to both nodes.

Below is the /etc/nginx/nginx.conf.

user  www;
worker_processes  1;

events {
    worker_connections  1024;
}


http {
    include       mime.types;
    default_type  application/octet-stream;    

    sendfile        on;

    keepalive_timeout  65;

    upstream esbhnbwso2.hnb.lk{
    server 10.110.6.45:8280;
    server 10.110.6.29:8280;
    }

    server {
        listen       80;
        server_name  localhost;


        location / {
            proxy_pass http://esbhnbwso2.hnb.lk;
            proxy_http_version 1.1;
        }

        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }

    }

}

when I try to call the service http://10.110.6.45/hnbceftapi I'm getting the below nginx page. What am I doing wrong? any help would be very much appreciated.

<html>
   <head>
      <meta content="HTML Tidy for Java (vers. 27 Sep 2004), see www.w3.org" name="generator"/>
      <title>404 Not Found</title>
   </head>
   <body bgcolor="white">
      <center>
         <h1>404 Not Found</h1>
      </center>
      <hr/>
      <center>nginx/1.14.2</center>
   </body>
</html>

Upvotes: 1

Views: 174

Answers (1)

Yasothar
Yasothar

Reputation: 453

After some internet reading, I was able to make nginx work. These were my finding, thought of sharing these.

I had to enable linux internal firewall with the below commands.

firewall-cmd --permanent --zone=public --add-service=http
firewall-cmd --permanent  --zone=public --add-service=https

These commands basically will create a public zone and allow http(80), https(443) traffic.

Can verify the allowed ports by running below command.

firewall-cmd --list-ports

Had to run the below command to allow the httpd - http daemon (Apache web server which nginx runs) to make http communication.

setsebool -P httpd_can_network_connect 1

These configuration were required because the distibution I was working on was a Security Enhanced Linux (SELinux). I'm not a system admin hence I was not aware of these configurations.

Upvotes: 1

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