Nginx load balancer config templates

load-balancer.conf.j2

http {
    upstream app-hosts {
        {{ lb_method }};
        server {{ groups['appserver'][0] }}:8000;
    }

    access_log /var/log/nginx/access.log;
    error_log /var/log/nginx/error.log;

    # This server accepts all traffic to port 80 and passes it to the upstream. 
    # Notice that the upstream name and the proxy_pass need to match.

    server {
       listen 80;
       server_name  {{ domain_name }} www.{{ domain_name }};
       return 301 https://$server_name$request_uri;
    
       #location / {
       #   proxy_pass http://app-hosts;
       #}
    }
    server {
       listen 443 ssl;
       server_name  {{ domain_name }} www.{{ domain_name }};
       add_header Strict-Transport-Security "max-age=31536000; includeSubDomains";
        
       ssl_certificate /etc/letsencrypt/live/{{ domain_name }}/cert.pem;
       ssl_certificate_key /etc/letsencrypt/live/{{ domain_name }}/privkey.pem;
       ssl_protocols TLSv1 TLSv1.1 TLSv1.2;

       location / {
          proxy_pass http://app-hosts;
       }
    }
}

nginx.conf.j2

user www-data;
worker_processes auto;
pid /run/nginx.pid;
include /etc/nginx/modules-enabled/*.conf;
include /etc/nginx/sites-enabled/*;

events {
        worker_connections 768;
        # multi_accept on;
}