server {
    listen       80;
    server_name  grafana.cestong.com.cn;

    #charset koi8-r;
    #access_log  /var/log/nginx/host.access.log  main;

    #add_header 'Access-Control-Allow-Origin' '*';  
    #add_header 'Access-Control-Allow-Methods' 'GET, POST, PUT, OPTIONS';  
    #add_header 'Access-Control-Allow-Headers' '*';  
    #add_header 'Access-Control-Expose-Headers' 'Content-Length,Content-Range';

    add_header 'Access-Control-Allow-Origin' '*';
    add_header 'Access-Control-Allow-Credentials' 'true';
    add_header Cache-Control private;
    add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
    add_header 'Access-Control-Allow-Headers' 'DNT,X-Mx-ReqToken,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Authorization';

    location / {
        if ($request_method = 'OPTIONS') {
                return 204;
        }
        proxy_pass  http://grafana.observe.svc.cluster.local;
        proxy_set_header Host $host;  
        proxy_set_header X-Real-IP $remote_addr;  
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    }

    location /ping {
	return 200 'pong';
    }

    location /api/live/ws {
        add_header 'Access-Control-Allow-Origin' '*';
        add_header 'Access-Control-Allow-Credentials' 'true';
        add_header Cache-Control private;
        add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
        add_header 'Access-Control-Allow-Headers' 'DNT,X-Mx-ReqToken,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Authorization';
        if ($request_method = 'OPTIONS') {
                return 204;
        }
	proxy_pass  http://grafana.observe.svc.cluster.local;
        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_set_header Upgrade $http_upgrade;
        proxy_set_header Connection $connection_upgrade;
    }
}