user  nginx;
worker_processes  auto;

error_log  /var/log/nginx/error.log notice;
pid        /var/run/nginx.pid;


events {
    worker_connections  1024;
}


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

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

    access_log  /var/log/nginx/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    keepalive_timeout  65;

    #gzip  on;

    include /etc/nginx/conf.d/*.conf;

    server {
        listen 8001;
        location /api {
          # limit_except GET {
          #    auth_basic "NGINX Plus API";
          #    auth_basic_user_file /path/to/passwd/file;
          # }
            api write=on;
            access_log off;
        }

        location = /dashboard.html {
            root   /usr/share/nginx/html;
            access_log off;
        }
        location /swagger-ui {
            root   /usr/share/nginx/html;
        }
    }

    keyval_zone zone=canary:64k state=canary.keyval;
    keyval abswitch $abswitchvalue zone=canary;

    upstream backendProduction {
        zone upstream_backend 64k;
        server springboot-2:8080 ;
    }

    upstream backendTest {
        zone upstream_backend 64k;
        server springboot-1:8080 ;
    }

    server {
        listen 8002;
        if ($abswitchvalue = 0){
            set $backend "backendTest";
        }
        if ($abswitchvalue = 1){
            set $backend "backendProduction";
        }
        location / {
            proxy_pass http://$backend; 
        }
    }


}