Nginx as controller for kube-dns

nginx.conf

worker_processes  1;

events {
  worker_connections  1024;  ## Default: 1024
}

http {
  gzip on;
  gzip_disable "msie6";

  gzip_vary on;
  gzip_proxied any;
  gzip_comp_level 6;
  gzip_buffers 16 8k;
  gzip_http_version 1.1;
  gzip_types text/plain text/css application/json application/javascript application/x-javascript text/xml application/xml application/xml+rss text/javascript;

  client_body_buffer_size 10K;
  client_header_buffer_size 1k;
  client_max_body_size 10m;
  large_client_header_buffers 4 8k;

  client_body_timeout 12;
  client_header_timeout 12;
  keepalive_timeout 15;
  send_timeout 10;

  keepalive_requests 1000;

  # websockets timeout
  proxy_read_timeout 950s;

  server {
    listen 80;
    server_name onlyssl.domain.com;

    location / {
        return 301 https://$http_host$request_uri;
    }
  }

  server {
      listen 443 ssl;
      server_name ~^(www\.)?(?<subdomain>.+)\.domain\.com$;

      ssl_certificate /etc/nginx/certs/domain.com.crt;
      ssl_certificate_key /etc/nginx/certs/domain.com.key;

      ssl_session_cache shared:SSL:10m;
      ssl_session_timeout  5m;

      ssl_ciphers  "EECDH+ECDSA+AESGCM EECDH+aRSA+AESGCM EECDH+ECDSA+SHA384 EECDH+ECDSA+SHA256 EECDH+aRSA+SHA384 EECDH+aRSA+SHA256 EECDH+aRSA+RC4 EECDH EDH+aRSA RC4 !EXPORT !aNULL !eNULL !LOW !3DES !MD5 !EXP !PSK !SRP !DSS";
      ssl_prefer_server_ciphers   on;

      ssl_protocols TLSv1 TLSv1.1 TLSv1.2;

      location /channel {
          resolver 10.0.0.10;
          proxy_pass http://$subdomain.default.svc.cluster.local;
          proxy_http_version 1.1;
          proxy_set_header Upgrade $http_upgrade;
          proxy_set_header Connection "upgrade";
      }

      location / {
          resolver 10.0.0.10;
          proxy_set_header X-Real-IP $remote_addr;
          proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
          proxy_set_header Host $host;
          proxy_pass http://$subdomain.default.svc.cluster.local;
          proxy_redirect off;
      }
  }

  server {
      listen 80;
      server_name ~^(www\.)?(?<subdomain>.+)\.domain\.com$;

      location / {
          resolver 10.0.0.10;
          proxy_set_header X-Real-IP $remote_addr;
          proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
          proxy_set_header Host $host;
          proxy_pass http://$subdomain.default.svc.cluster.local;
          proxy_redirect off;
      }
  }
}