Issue

• How to configure nginx as load balancer in CJE

Environment

• CloudBees Jenkins Enterprise - Anywhere

Resolution

Nginx Load Balancer Example

For example, to use Nginx as your load balancer here’s what you would do:

• Use a dedicated VM instance running Ubuntu 14.04 LTS (192.168.1.99). This instance must have network connectivity to all Controller nodes (192.168.1.240, 192.168.1.247, and 192.168.1.251).
• Install nginx by executing on the instance, sudo apt-get install nginx
• Add the following line to the file /etc/nginx/nginx.conf if it is not already there in the http block.

http {
  ...
  include /etc/nginx/conf.d/*.conf;
}

• Create an additional file /etc/nginx/conf.d/jce.conf

upstream backend {
  server 192.168.1.240;
  server 192.168.1.247;
  server 192.168.1.251;
}

log_format access_apps_path_mode '$remote_addr - $remote_user [$time_local] "$request" $status $body_bytes_sent "$http_referer" "$http_user_agent"';

server {
  listen 80;

  server_name cje.example.com mesos.cje.example.com marathon.cje.example.com;

  access_log /var/log/nginx/apps_path_mode.log access_apps_path_mode;

  location / {
    proxy_pass http://backend;
    proxy_set_header Host $host;
    proxy_redirect off;

    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;

    client_max_body_size 250m;
    client_body_buffer_size 128k;

    proxy_connect_timeout 90;
    proxy_send_timeout 300;
    proxy_read_timeout 300;

    proxy_buffering off;

    proxy_temp_file_write_size 64k;
  }
}

• Restart Nginx by executing sudo service nginx restart