Jenkins and SonarQube on Single Host with Nginx 

Keep SonarQube run on its default port  9000

Nginx Configuration for Jenkins

server {

    listen 80;

    location / {

      proxy_set_header        Host $host:$server_port;
      proxy_set_header        X-Real-IP $remote_addr;
      proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;
      proxy_set_header        X-Forwarded-Proto $scheme;

      # Fix the "It appears that your reverse proxy set up is broken" error.
      proxy_pass          http://127.0.0.1:8080;
      proxy_read_timeout  90;

      proxy_redirect      http://127.0.0.1:8080 http://172.21.26.20;

      # Required for new HTTP-based CLI
      proxy_http_version 1.1;
      proxy_request_buffering off;
    }
  }

Sonar Configuration :

Install Sonar as per below URL :

https://hostpresto.com/community/tutorials/how-to-install-sonarqube-continuous-inspection-on-ubuntu-14-04/

• Setup MySQL Username & Password 
• Create Sonarqube database in MySQL

Once above done start Sonar server. Try to browse Sonar URL http://<Server IP address>:9000/

Jenkins Configuration :

Install Plugin - SonarQube Scanner 

                         SonarQube Servers

                         SonarQube Graph

Create Authentication Token in SonarQube --> MyAccont-->Security