021_nginx动态upstream检查

GET： 请求指定的页面信息，并返回实体主体。
HEAD： 只请求页面的首部。

#参考:http://tengine.taobao.org/document_cn/http_upstream_check_cn.html

一、

upstream anubis.web.base_backend {
    server bj-base-1.jyall.me:9000; 
    server bj-base-2.jyall.me:9000; 
    keepalive 512;
    check interval=1000 rise=2 fall=2 timeout=3000 type=http;
    check_http_send "HEAD / HTTP/1.1
Connection: keep-alive

";  
    check_http_expect_alive http_2xx http_3xx http_4xx;
}

二、

curl -d " 
    server bj-base-1.jyall.me:9000; 
    server bj-base-2.jyall.me:9000; 

    keepalive 512;

    check interval=1000 fall=3 rise=2 timeout=3000 default_down=false type=http;
    check_http_send 'GET / HTTP/1.1
Connection: keep-alive
Host: open-anubis.ele.me

';   #替代的配置check_keepalive_requests 100;
    check_http_expect_alive http_2xx http_3xx http_4xx;

" 127.0.0.1:8866/upstream/open.jyall.me.web.base_backend

返回"success"=>表示ok的

三、

curl 127.0.0.1:8866/up_status

<tr>
<td>4</td><td>open.jyall.me.web.base_backend</td> 

<td>11.200.58.236:9000</td> <td>up</td> <td>215515</td> <td>0</td> 
<td>http</td> <td>0</td> </tr> <tr> 

<td>5</td> <td>open.jyall.me.web.base_backend</td> 
<td>11.200.62.77:9000</td> 
<td>up</td> 

<td>215283</td> <td>0</td> <td>http</td> <td>0</td> </tr>