php怎么监控varnish缓存服务器状态？

2. $outfile=shell_exec("/usr/bin/varnishstat -x");
3. $xml=simplexml_load_string($outfile);
4. echo $xml->getName() . "
   ";
5. foreach($xml->children() as $child)
6. {
7. //$tmpName="";
8. foreach($child->children() as $subChild)
9. {
10. if ($subChild->getName() =="name" )
11. {
12. $tmpName=$subChild;
13. }
14. elseif ($subChild->getName() =="value" )
15. {
16. if ($tmpName!="")
17. {
18. $arys["$tmpName"]=$subChild;
19. $tmpName="";
20. }
21. }
22. else
23. {
24. continue;
25. }
26. }
27. }
28. function byteReduce($bytes)
29. {
30. if ($bytes>1099511627776)
31. {
32. return round($bytes/1099511627776)."TB";
33. }
34. else if ($bytes > 1073741824)
35. {
36. return round($bytes/1073741824)."GB";
37. }
38. else if ($bytes>1048576)
39. {
40. return round($bytes/1048576)."MB";
41. }
42. else if ($bytes>1024)
43. {
44. return round($bytes/1024)."KB";
45. }
46. else
47. {
48. return $bytes."B";
49. }
50. }
51. echo "client_conn: ".$arys["client_conn"] . "
    ";
52. echo "client_req: ".$arys["client_req"] . "
    ";
53. echo "cache_hit: ".$arys["cache_hit"] . "
    ";
54. echo "cache_miss: ".$arys["cache_miss"] . "
    ";
55. echo "Cache hit rate: ".round(($arys["cache_hit"]/$arys["client_req"])*100)." %
    ";
56. echo "LRU nuked objects: ".$arys[n_lru_nuked]."
    ";
57. echo " ".byteReduce($arys["s_bodybytes"]+$arys["s_hdrbytes"])." Acc Content (".byteReduce($arys["s_hdrbytes"])." header ".byteReduce($arys["s_bodybytes"])." Body)";
58. ?>

效果，如下图：

备注，为了查看实时情况，可以在在监控页加个html定时刷新，可以随时查看varnish缓存服务器状态。