基于Nginx的Mencached缓存配置详解 |
| 51自学网 2022-07-04 11:42:04 |
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| 简介 memcached是一套分布式的高速缓存系统，memcached缺乏认证以及安全管制，这代表应该将memcached服务器放置在防火墙后。memcached的API使用三十二比特的循环冗余校验（CRC-32）计算键值后，将数据分散在不同的机器上。当表格满了以后，接下来新增的数据会以LRU机制替换掉。由于memcached通常只是当作缓存系统使用，所以使用memcached的应用程序在写回较慢的系统时（像是后端的数据库）需要额外的代码更新memcached内的数据
特征
memcached作为高速运行的分布式缓存服务器，具有以下的特点: - 协议简单
- 基于libevent的事件处理
- 内置内存存储方式
- memcached不互相通信的分布式
前期准备 准备三台Centos7虚拟机，配置IP地址和hostname，关闭防火墙和selinux，同步系统时间，修改IP地址和hostname映射 | ip | hostname | | 192.168.29.132 | master | | 192.168.29.138 | bak | | 192.168.29.133 | mid | | | master和bak机器部署Nginx和PHP 部署memcache mid机器部署memcached客户端 [root@mid ~]# yum install memcached -y#启动服务[root@mid ~]# systemctl start memcached.service#查看启动情况,点击回车出现ERROR则启动成功[root@master ~]# telnet 192.168.29.133 11211Trying 192.168.29.133...Connected to 192.168.29.133.Escape character is '^]'.ERROR master和mid机器部署PHP的memcached扩展
下载libmemcached和memcached压缩包 #解压并安装libmemcached[root@master ~]#tar -xvf libmemcached-1.0.18.tar.gz[root@master ~]#cd libmemcached-1.0.18#若编译报错，将clients/memflush.cc中报错相应位置的false改为NULL[root@master ~]#./configure --prefix=/usr/local/libmemcachedmake && make install#解压并安装memcached[root@master ~]#tar -zxvf memcached-3.1.5.tgz[root@master ~]#cd memcached-3.1.5[root@master ~]#phpize[root@master ~]#./configure --with-libmemcached-dir=/usr/local/libmemcached --disable-memcached-sasl[root@master ~]#make && make install#完成后观察php目录下的lib/php/extensions/no-debug-zts-20170718/是否有扩展memcached.so#添加扩展至php配置文件[root@master ~]# vi /usr/local/php/etc/php.iniextension=memcached.so 测试验证 [root@master ~]# vi /usr/local/nginx/html/test.php <?phpphpinfo();?> 访问http://ip/test.php 
注:bak机器进行相同操作 配置缓存 配置Nginx配置文件 [root@master ~]# cat /usr/local/nginx/conf/nginx.confworker_processes 1;events { worker_connections 1024;}http { include mime.types; default_type application/octet-stream; sendfile on; keepalive_timeout 65; server { listen 80; server_name localhost; location / { root html; index index.html index.htm; } #memcached缓存配置，有缓存则读取，没有缓存则报404错误 location /demo/ { set $memcached_key $request_uri; add_header X-mem-key $memcached_key; memcached_pass 192.168.29.133:11211; default_type text/html; #报错后转到特定Location error_page 404 502 504 = @mymemcached; } #配置重写策略执行特定php文件 location @mymemcached { rewrite .* /demo.php?key=$request_uri; } location ~ /.php$ { root html; fastcgi_pass 127.0.0.1:9000; fastcgi_index index.php; fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name; include fastcgi_params; } }}编写PHP文件设置memcached缓存 #创建demo文件夹[root@master ~] mkdir /usr/local/nginx/html/demo#创建测试文件[root@master ~] echo "123" >> /usr/local/nginx/html/demo/123.html[root@master ~]# vi /usr/local/nginx/html/demo.php <?php $fn=dirname(__FILE__) . $_SERVER['REQUEST_URI']; if(file_exists($fn)){ $data=file_get_contents($fn); $m=new Memcached(); $server=array( array('192.168.29.133',11211) ); $m->addServers($server); $r=$m->set($_GET['key'],$data); header('Content-Length:'.filesize($fn)."/r/n"); header('Content-Type:file'."/r/n"); header('X-cache:MISS:'."/r/n"); echo $data; } #不存在demo文件夹则返回首页 else{ header('Location:../index.html'."/r/n"); }?>注:bak机器进行相同的设置 测试验证 #可看出第一次memcache中没有缓存，第二次击中缓存[root@bak ~]# curl -I http://192.168.29.132/demo/123.htmlHTTP/1.1 200 OKServer: nginx/1.16.1Date: Thu, 25 Jun 2020 02:23:00 GMTContent-Type: fileContent-Length: 4Connection: keep-aliveX-Powered-By: PHP/7.2.26X-cache: MISS:[root@bak ~]# curl -I http://192.168.29.132/demo/123.htmlHTTP/1.1 200 OKServer: nginx/1.16.1Date: Thu, 25 Jun 2020 02:23:01 GMTContent-Type: text/htmlContent-Length: 4Connection: keep-aliveX-mem-key: /demo/123.htmlAccept-Ranges: bytes#当设置缓存后，访问相同的缓存key时，即使发起访问的机器不相同也同样能击中缓存[root@master ~]# curl -I http://192.168.29.138/demo/123.htmlHTTP/1.1 200 OKServer: nginx/1.16.1Date: Thu, 25 Jun 2020 02:29:46 GMTContent-Type: text/htmlContent-Length: 4Connection: keep-aliveX-mem-key: /demo/123.htmlAccept-Ranges: bytes 查看memcached缓存状态
memcached监控文件 <?php/* +----------------------------------------------------------------------+ | PHP Version 5 | +----------------------------------------------------------------------+ | Copyright (c) 1997-2004 The PHP Group | +----------------------------------------------------------------------+ | This source file is subject to version 3.0 of the PHP license, | | that is bundled with this package in the file LICENSE, and is | | available through the world-wide-web at the following url: | | http://www.php.net/license/3_0.txt. | | If you did not receive a copy of the PHP license and are unable to | | obtain it through the world-wide-web, please send a note to | | license@php.net so we can mail you a copy immediately. | +----------------------------------------------------------------------+ | Author: Harun Yayli <harunyayli at gmail.com> | +----------------------------------------------------------------------+*///memcached图形化小工具$VERSION='$Id: memcache.php,v 1.1.2.3 2008/08/28 18:07:54 mikl Exp $';#设置用户名define('ADMIN_USERNAME','admin'); #设置密码define('ADMIN_PASSWORD','123456'); define('DATE_FORMAT','Y/m/d H:i:s');define('GRAPH_SIZE',200);define('MAX_ITEM_DUMP',50);#设置memcached主机信息$MEMCACHE_SERVERS[] = '192.168.29.133:11211'; ////////// END OF DEFAULT CONFIG AREA ////////////////////////////////////////////////////////////////////////////// Password protect ////////////////////////////////////////////////////////////////if (!isset($_SERVER['PHP_AUTH_USER']) || !isset($_SERVER['PHP_AUTH_PW']) || $_SERVER['PHP_AUTH_USER'] != ADMIN_USERNAME ||$_SERVER['PHP_AUTH_PW'] != ADMIN_PASSWORD) { Header("WWW-Authenticate: Basic realm=/"Memcache Login/""); Header("HTTP/1.0 401 Unauthorized"); echo <<<EOB <html><body> <h1>Rejected!</h1> <big>Wrong Username or Password!</big> </body></html>EOB; exit;}///////////MEMCACHE FUNCTIONS /////////////////////////////////////////////////////////////////////function sendMemcacheCommands($command){ global $MEMCACHE_SERVERS; $result = array(); foreach($MEMCACHE_SERVERS as $server){ $strs = explode(':',$server); $host = $strs[0]; $port = $strs[1]; $result[$server] = sendMemcacheCommand($host,$port,$command); } return $result;}function sendMemcacheCommand($server,$port,$command){ $s = @fsockopen($server,$port); if (!$s){ die("Cant connect to:".$server.':'.$port); } fwrite($s, $command."/r/n"); $buf=''; while ((!feof($s))) { $buf .= fgets($s, 256); if (strpos($buf,"END/r/n")!==false){ // stat says end break; } if (strpos($buf,"DELETED/r/n")!==false || strpos($buf,"NOT_FOUND/r/n")!==false){ // delete says these break; } if (strpos($buf,"OK/r/n")!==false){ // flush_all says ok break; } } fclose($s); return parseMemcacheResults($buf);}function parseMemcacheResults($str){ $res = array(); $lines = explode("/r/n",$str); $cnt = count($lines); for($i=0; $i< $cnt; $i++){ $line = $lines[$i]; $l = explode(' ',$line,3); if (count($l)==3){ $res[$l[0]][$l[1]]=$l[2]; if ($l[0]=='VALUE'){ // next line is the value $res[$l[0]][$l[1]] = array(); list ($flag,$size)=explode(' ',$l[2]); $res[$l[0]][$l[1]]['stat']=array('flag'=>$flag,'size'=>$size); $res[$l[0]][$l[1]]['value']=$lines[++$i]; } }elseif($line=='DELETED' || $line=='NOT_FOUND' || $line=='OK'){ return $line; } } return $res;}function dumpCacheSlab($server,$slabId,$limit){ list($host,$port) = explode(':',$server); $resp = sendMemcacheCommand($host,$port,'stats cachedump '.$slabId.' '.$limit); return $resp;}function flushServer($server){ list($host,$port) = explode(':',$server); $resp = sendMemcacheCommand($host,$port,'flush_all'); return $resp;}function getCacheItems(){ $items = sendMemcacheCommands('stats items'); $serverItems = array(); $totalItems = array(); foreach ($items as $server=>$itemlist){ $serverItems[$server] = array(); $totalItems[$server]=0; if (!isset($itemlist['STAT'])){ continue; } $iteminfo = $itemlist['STAT']; foreach($iteminfo as $keyinfo=>$value){ if (preg_match('/items/:(/d+?)/:(.+?)$/',$keyinfo,$matches)){ $serverItems[$server][$matches[1]][$matches[2]] = $value; if ($matches[2]=='number'){ $totalItems[$server] +=$value; } } } } return array('items'=>$serverItems,'counts'=>$totalItems);}function getMemcacheStats($total=true){ $resp = sendMemcacheCommands('stats'); if ($total){ $res = array(); foreach($resp as $server=>$r){ foreach($r['STAT'] as $key=>$row){ if (!isset($res[$key])){ $res[$key]=null; } switch ($key){ case 'pid': $res['pid'][$server]=$row; break; case 'uptime': $res['uptime'][$server]=$row; break; case 'time': $res['time'][$server]=$row; break; case 'version': $res['version'][$server]=$row; break; case 'pointer_size': $res['pointer_size'][$server]=$row; break; case 'rusage_user': $res['rusage_user'][$server]=$row; break; case 'rusage_system': $res['rusage_system'][$server]=$row; break; case 'curr_items': $res['curr_items']+=$row; break; case 'total_items': $res['total_items']+=$row; break; case 'bytes': $res['bytes']+=$row; break; case 'curr_connections': $res['curr_connections']+=$row; break; case 'total_connections': $res['total_connections']+=$row; break; case 'connection_structures': $res['connection_structures']+=$row; break; case 'cmd_get': $res['cmd_get']+=$row; break; case 'cmd_set': $res['cmd_set']+=$row; break; case 'get_hits': $res['get_hits']+=$row; break; case 'get_misses': $res['get_misses']+=$row; break; case 'evictions': $res['evictions']+=$row; break; case 'bytes_read': $res['bytes_read']+=$row; break; case 'bytes_written': $res['bytes_written']+=$row; break; case 'limit_maxbytes': $res['limit_maxbytes']+=$row; break; case 'threads': $res['rusage_system'][$server]=$row; break; } } } return $res; } return $resp;}////////////////////////////////////////////////////////// don't cache this page//header("Cache-Control: no-store, no-cache, must-revalidate"); // HTTP/1.1header("Cache-Control: post-check=0, pre-check=0", false);header("Pragma: no-cache"); // HTTP/1.0function duration($ts) { global $time; $years = (int)((($time - $ts)/(7*86400))/52.177457); $rem = (int)(($time-$ts)-($years * 52.177457 * 7 * 86400)); $weeks = (int)(($rem)/(7*86400)); $days = (int)(($rem)/86400) - $weeks*7; $hours = (int)(($rem)/3600) - $days*24 - $weeks*7*24; $mins = (int)(($rem)/60) - $hours*60 - $days*24*60 - $weeks*7*24*60; $str = ''; if($years==1) $str .= "$years year, "; if($years>1) $str .= "$years years, "; if($weeks==1) $str .= "$weeks week, "; if($weeks>1) $str .= "$weeks weeks, "; if($days==1) $str .= "$days day,"; if($days>1) $str .= "$days days,"; if($hours == 1) $str .= " $hours hour and"; if($hours>1) $str .= " $hours hours and"; if($mins == 1) $str .= " 1 minute"; else $str .= " $mins minutes"; return $str;}// create graphics//function graphics_avail() { return extension_loaded('gd');}function bsize($s) { foreach (array('','K','M','G') as $i => $k) { if ($s < 1024) break; $s/=1024; } return sprintf("%5.1f %sBytes",$s,$k);}// create menu entryfunction menu_entry($ob,$title) { global $PHP_SELF; if ($ob==$_GET['op']){ return "<li><a class=/"child_active/" href=/"$PHP_SELF&op=$ob/">$title</a></li>"; } return "<li><a class=/"active/" href=/"$PHP_SELF&op=$ob/">$title</a></li>";}function getHeader(){ $header = <<<EOB<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><title>MEMCACHE INFO</title><style type="text/css"><!--body { background:white; font-size:100.01%; margin:0; padding:0; }body,p,td,th,input,submit { font-size:0.8em;font-family:arial,helvetica,sans-serif; }* html body {font-size:0.8em}* html p {font-size:0.8em}* html td {font-size:0.8em}* html th {font-size:0.8em}* html input {font-size:0.8em}* html submit {font-size:0.8em}td { vertical-align:top }a { color:black; font-weight:none; text-decoration:none; }a:hover { text-decoration:underline; }div.content { padding:1em 1em 1em 1em; position:absolute; width:97%; z-index:100; }h1.memcache { background:rgb(153,153,204); margin:0; padding:0.5em 1em 0.5em 1em; }* html h1.memcache { margin-bottom:-7px; }h1.memcache a:hover { text-decoration:none; color:rgb(90,90,90); }h1.memcache span.logo { background:rgb(119,123,180); color:black; border-right: solid black 1px; border-bottom: solid black 1px; font-style:italic; font-size:1em; padding-left:1.2em; padding-right:1.2em; text-align:right; display:block; width:130px; }h1.memcache span.logo span.name { color:white; font-size:0.7em; padding:0 0.8em 0 2em; }h1.memcache span.nameinfo { color:white; display:inline; font-size:0.4em; margin-left: 3em; }h1.memcache div.copy { color:black; font-size:0.4em; position:absolute; right:1em; }hr.memcache { background:white; border-bottom:solid rgb(102,102,153) 1px; border-style:none; border-top:solid rgb(102,102,153) 10px; height:12px; margin:0; margin-top:1px; padding:0;}ol,menu { margin:1em 0 0 0; padding:0.2em; margin-left:1em;}ol.menu li { display:inline; margin-right:0.7em; list-style:none; font-size:85%}ol.menu a { background:rgb(153,153,204); border:solid rgb(102,102,153) 2px; color:white; font-weight:bold; margin-right:0em; padding:0.1em 0.5em 0.1em 0.5em; text-decoration:none; margin-left: 5px; }ol.menu a.child_active { background:rgb(153,153,204); border:solid rgb(102,102,153) 2px; color:white; font-weight:bold; margin-right:0em; padding:0.1em 0.5em 0.1em 0.5em; text-decoration:none; border-left: solid black 5px; margin-left: 0px; }ol.menu span.active { background:rgb(153,153,204); border:solid rgb(102,102,153) 2px; color:black; font-weight:bold; margin-right:0em; padding:0.1em 0.5em 0.1em 0.5em; text-decoration:none; border-left: solid black 5px; }ol.menu span.inactive { background:rgb(193,193,244); border:solid rgb(182,182,233) 2px; color:white; font-weight:bold; margin-right:0em; padding:0.1em 0.5em 0.1em 0.5em; text-decoration:none; margin-left: 5px; }ol.menu a:hover { background:rgb(193,193,244); text-decoration:none; }div.info { background:rgb(204,204,204); border:solid rgb(204,204,204) 1px; margin-bottom:1em; }div.info h2 { background:rgb(204,204,204); color:black; font-size:1em; margin:0; padding:0.1em 1em 0.1em 1em; }div.info table { border:solid rgb(204,204,204) 1px; border-spacing:0; width:100%; }div.info table th { background:rgb(204,204,204); color:white; margin:0; padding:0.1em 1em 0.1em 1em; }div.info table th a.sortable { color:black; }div.info table tr.tr-0 { background:rgb(238,238,238); }div.info table tr.tr-1 { background:rgb(221,221,221); }div.info table td { padding:0.3em 1em 0.3em 1em; }div.info table td.td-0 { border-right:solid rgb(102,102,153) 1px; white-space:nowrap; }div.info table td.td-n { border-right:solid rgb(102,102,153) 1px; }div.info table td h3 { color:black; font-size:1.1em; margin-left:-0.3em; }.td-0 a , .td-n a, .tr-0 a , tr-1 a { text-decoration:underline;}div.graph { margin-bottom:1em }div.graph h2 { background:rgb(204,204,204);; color:black; font-size:1em; margin:0; padding:0.1em 1em 0.1em 1em; }div.graph table { border:solid rgb(204,204,204) 1px; color:black; font-weight:normal; width:100%; }div.graph table td.td-0 { background:rgb(238,238,238); }div.graph table td.td-1 { background:rgb(221,221,221); }div.graph table td { padding:0.2em 1em 0.4em 1em; }div.div1,div.div2 { margin-bottom:1em; width:35em; }div.div3 { position:absolute; left:40em; top:1em; width:580px; }//div.div3 { position:absolute; left:37em; top:1em; right:1em; }div.sorting { margin:1.5em 0em 1.5em 2em }.center { text-align:center }.aright { position:absolute;right:1em }.right { text-align:right }.ok { color:rgb(0,200,0); font-weight:bold}.failed { color:rgb(200,0,0); font-weight:bold}span.box { border: black solid 1px; border-right:solid black 2px; border-bottom:solid black 2px; padding:0 0.5em 0 0.5em; margin-right:1em;}span.green { background:#60F060; padding:0 0.5em 0 0.5em}span.red { background:#D06030; padding:0 0.5em 0 0.5em }div.authneeded { background:rgb(238,238,238); border:solid rgb(204,204,204) 1px; color:rgb(200,0,0); font-size:1.2em; font-weight:bold; padding:2em; text-align:center; }input { background:rgb(153,153,204); border:solid rgb(102,102,153) 2px; color:white; font-weight:bold; margin-right:1em; padding:0.1em 0.5em 0.1em 0.5em; }//--></style></head><body><div class="head"> <h1 class="memcache"> <span class="logo"><a href="http://pecl.php.net/package/memcache" rel="external nofollow" >memcache</a></span> <span class="nameinfo">memcache.php by <a href="http://livebookmark.net" rel="external nofollow" >Harun Yayli</a></span> </h1> <hr class="memcache"></div><div class=content>EOB; return $header;}function getFooter(){ global $VERSION; $footer = '</div><!-- Based on apc.php '.$VERSION.'--></body></html>'; return $footer;}function getMenu(){ global $PHP_SELF;echo "<ol class=menu>";if ($_GET['op']!=4){echo <<<EOB <li><a href="$PHP_SELF&op={$_GET['op']}" rel="external nofollow" >Refresh Data</a></li>EOB;}else {echo <<<EOB <li><a href="$PHP_SELF&op=2}" rel="external nofollow" >Back</a></li>EOB;}echo menu_entry(1,'View Host Stats'), menu_entry(2,'Variables');echo <<<EOB </ol> <br/>EOB;}// TODO, AUTH$_GET['op'] = !isset($_GET['op'])? '1':$_GET['op'];$PHP_SELF= isset($_SERVER['PHP_SELF']) ? htmlentities(strip_tags($_SERVER['PHP_SELF'],'')) : '';$PHP_SELF=$PHP_SELF.'?';$time = time();// sanitize _GETforeach($_GET as $key=>$g){ $_GET[$key]=htmlentities($g);}// singleout// when singleout is set, it only gives details for that server.if (isset($_GET['singleout']) && $_GET['singleout']>=0 && $_GET['singleout'] <count($MEMCACHE_SERVERS)){ $MEMCACHE_SERVERS = array($MEMCACHE_SERVERS[$_GET['singleout']]);}// display imagesif (isset($_GET['IMG'])){ $memcacheStats = getMemcacheStats(); $memcacheStatsSingle = getMemcacheStats(false); if (!graphics_avail()) { exit(0); } function fill_box($im, $x, $y, $w, $h, $color1, $color2,$text='',$placeindex='') { global $col_black; $x1=$x+$w-1; $y1=$y+$h-1; imagerectangle($im, $x, $y1, $x1+1, $y+1, $col_black); if($y1>$y) imagefilledrectangle($im, $x, $y, $x1, $y1, $color2); else imagefilledrectangle($im, $x, $y1, $x1, $y, $color2); imagerectangle($im, $x, $y1, $x1, $y, $color1); if ($text) { if ($placeindex>0) { if ($placeindex<16) { $px=5; $py=$placeindex*12+6; imagefilledrectangle($im, $px+90, $py+3, $px+90-4, $py-3, $color2); imageline($im,$x,$y+$h/2,$px+90,$py,$color2); imagestring($im,2,$px,$py-6,$text,$color1); } else { if ($placeindex<31) { $px=$x+40*2; $py=($placeindex-15)*12+6; } else { $px=$x+40*2+100*intval(($placeindex-15)/15); $py=($placeindex%15)*12+6; } imagefilledrectangle($im, $px, $py+3, $px-4, $py-3, $color2); imageline($im,$x+$w,$y+$h/2,$px,$py,$color2); imagestring($im,2,$px+2,$py-6,$text,$color1); } } else { imagestring($im,4,$x+5,$y1-16,$text,$color1); } } } function fill_arc($im, $centerX, $centerY, $diameter, $start, $end, $color1,$color2,$text='',$placeindex=0) { $r=$diameter/2; $w=deg2rad((360+$start+($end-$start)/2)%360); if (function_exists("imagefilledarc")) { // exists only if GD 2.0.1 is avaliable imagefilledarc($im, $centerX+1, $centerY+1, $diameter, $diameter, $start, $end, $color1, IMG_ARC_PIE); imagefilledarc($im, $centerX, $centerY, $diameter, $diameter, $start, $end, $color2, IMG_ARC_PIE); imagefilledarc($im, $centerX, $centerY, $diameter, $diameter, $start, $end, $color1, IMG_ARC_NOFILL|IMG_ARC_EDGED); } else { imagearc($im, $centerX, $centerY, $diameter, $diameter, $start, $end, $color2); imageline($im, $centerX, $centerY, $centerX + cos(deg2rad($start)) * $r, $centerY + sin(deg2rad($start)) * $r, $color2); imageline($im, $centerX, $centerY, $centerX + cos(deg2rad($start+1)) * $r, $centerY + sin(deg2rad($start)) * $r, $color2); imageline($im, $centerX, $centerY, $centerX + cos(deg2rad($end-1)) * $r, $centerY + sin(deg2rad($end)) * $r, $color2); imageline($im, $centerX, $centerY, $centerX + cos(deg2rad($end)) * $r, $centerY + sin(deg2rad($end)) * $r, $color2); imagefill($im,$centerX + $r*cos($w)/2, $centerY + $r*sin($w)/2, $color2); } if ($text) { if ($placeindex>0) { imageline($im,$centerX + $r*cos($w)/2, $centerY + $r*sin($w)/2,$diameter, $placeindex*12,$color1); imagestring($im,4,$diameter, $placeindex*12,$text,$color1); } else { imagestring($im,4,$centerX + $r*cos($w)/2, $centerY + $r*sin($w)/2,$text,$color1); } } } $size = GRAPH_SIZE; // image size $image = imagecreate($size+50, $size+10); $col_white = imagecolorallocate($image, 0xFF, 0xFF, 0xFF); $col_red = imagecolorallocate($image, 0xD0, 0x60, 0x30); $col_green = imagecolorallocate($image, 0x60, 0xF0, 0x60); $col_black = imagecolorallocate($image, 0, 0, 0); imagecolortransparent($image,$col_white); switch ($_GET['IMG']){ case 1: // pie chart $tsize=$memcacheStats['limit_maxbytes']; $avail=$tsize-$memcacheStats['bytes']; $x=$y=$size/2; $angle_from = 0; $fuzz = 0.000001; foreach($memcacheStatsSingle as $serv=>$mcs) { $free = $mcs['STAT']['limit_maxbytes']-$mcs['STAT']['bytes']; $used = $mcs['STAT']['bytes']; if ($free>0){ // draw free $angle_to = ($free*360)/$tsize; $perc =sprintf("%.2f%%", ($free *100) / $tsize) ; fill_arc($image,$x,$y,$size,$angle_from,$angle_from + $angle_to ,$col_black,$col_green,$perc); $angle_from = $angle_from + $angle_to ; } if ($used>0){ // draw used $angle_to = ($used*360)/$tsize; $perc =sprintf("%.2f%%", ($used *100) / $tsize) ; fill_arc($image,$x,$y,$size,$angle_from,$angle_from + $angle_to ,$col_black,$col_red, '('.$perc.')' ); $angle_from = $angle_from+ $angle_to ; } } break; case 2: // hit miss $hits = ($memcacheStats['get_hits']==0) ? 1:$memcacheStats['get_hits']; $misses = ($memcacheStats['get_misses']==0) ? 1:$memcacheStats['get_misses']; $total = $hits + $misses ; fill_box($image, 30,$size,50,-$hits*($size-21)/$total,$col_black,$col_green,sprintf("%.1f%%",$hits*100/$total)); fill_box($image,130,$size,50,-max(4,($total-$hits)*($size-21)/$total),$col_black,$col_red,sprintf("%.1f%%",$misses*100/$total)); break; } header("Content-type: image/png"); imagepng($image); exit;}echo getHeader();echo getMenu();switch ($_GET['op']) { case 1: // host stats $phpversion = phpversion(); $memcacheStats = getMemcacheStats(); $memcacheStatsSingle = getMemcacheStats(false); $mem_size = $memcacheStats['limit_maxbytes']; $mem_used = $memcacheStats['bytes']; $mem_avail= $mem_size-$mem_used; $startTime = time()-array_sum($memcacheStats['uptime']); $curr_items = $memcacheStats['curr_items']; $total_items = $memcacheStats['total_items']; $hits = ($memcacheStats['get_hits']==0) ? 1:$memcacheStats['get_hits']; $misses = ($memcacheStats['get_misses']==0) ? 1:$memcacheStats['get_misses']; $sets = $memcacheStats['cmd_set']; $req_rate = sprintf("%.2f",($hits+$misses)/($time-$startTime)); $hit_rate = sprintf("%.2f",($hits)/($time-$startTime)); $miss_rate = sprintf("%.2f",($misses)/($time-$startTime)); $set_rate = sprintf("%.2f",($sets)/($time-$startTime)); echo <<< EOB <div class="info div1"><h2>General Cache Information</h2> <table cellspacing=0><tbody> <tr class=tr-1><td class=td-0>PHP Version</td><td>$phpversion</td></tr>EOB; echo "<tr class=tr-0><td class=td-0>Memcached Host". ((count($MEMCACHE_SERVERS)>1) ? 's':'')."</td><td>"; $i=0; if (!isset($_GET['singleout']) && count($MEMCACHE_SERVERS)>1){ foreach($MEMCACHE_SERVERS as $server){ echo ($i+1).'. <a href="'.$PHP_SELF.'&singleout='.$i++.'" rel="external nofollow" >'.$server.'</a><br/>'; } } else{ echo '1.'.$MEMCACHE_SERVERS[0]; } if (isset($_GET['singleout'])){ echo '<a href="'.$PHP_SELF.'" rel="external nofollow" >(all servers)</a><br/>'; } echo "</td></tr>/n"; echo "<tr class=tr-1><td class=td-0>Total Memcache Cache</td><td>".bsize($memcacheStats['limit_maxbytes'])."</td></tr>/n"; echo <<<EOB </tbody></table> </div> <div class="info div1"><h2>Memcache Server Information</h2>EOB; foreach($MEMCACHE_SERVERS as $server){ echo '<table cellspacing=0><tbody>'; echo '<tr class=tr-1><td class=td-1>'.$server.'</td><td><a href="'.$PHP_SELF.'&server='.array_search($server,$MEMCACHE_SERVERS).'&op=6" rel="external nofollow" >[<b>Flush this server</b>]</a></td></tr>'; echo '<tr class=tr-0><td class=td-0>Start Time</td><td>',date(DATE_FORMAT,$memcacheStatsSingle[$server]['STAT']['time']-$memcacheStatsSingle[$server]['STAT']['uptime']),'</td></tr>'; echo '<tr class=tr-1><td class=td-0>Uptime</td><td>',duration($memcacheStatsSingle[$server]['STAT']['time']-$memcacheStatsSingle[$server]['STAT']['uptime']),'</td></tr>'; echo '<tr class=tr-0><td class=td-0>Memcached Server Version</td><td>'.$memcacheStatsSingle[$server]['STAT']['version'].'</td></tr>'; echo '<tr class=tr-1><td class=td-0>Used Cache Size</td><td>',bsize($memcacheStatsSingle[$server]['STAT']['bytes']),'</td></tr>'; echo '<tr class=tr-0><td class=td-0>Total Cache Size</td><td>',bsize($memcacheStatsSingle[$server]['STAT']['limit_maxbytes']),'</td></tr>'; echo '</tbody></table>'; } echo <<<EOB </div> <div class="graph div3"><h2>Host Status Diagrams</h2> <table cellspacing=0><tbody>EOB; $size='width='.(GRAPH_SIZE+50).' height='.(GRAPH_SIZE+10); echo <<<EOB <tr> <td class=td-0>Cache Usage</td> <td class=td-1>Hits & Misses</td> </tr>EOB; echo graphics_avail() ? '<tr>'. "<td class=td-0><img alt=/"/" $size src=/"$PHP_SELF&IMG=1&".(isset($_GET['singleout'])? 'singleout='.$_GET['singleout'].'&':'')."$time/"></td>". "<td class=td-1><img alt=/"/" $size src=/"$PHP_SELF&IMG=2&".(isset($_GET['singleout'])? 'singleout='.$_GET['singleout'].'&':'')."$time/"></td></tr>/n" : "", '<tr>', '<td class=td-0><span class="green box"> </span>Free: ',bsize($mem_avail).sprintf(" (%.1f%%)",$mem_avail*100/$mem_size),"</td>/n", '<td class=td-1><span class="green box"> </span>Hits: ',$hits.sprintf(" (%.1f%%)",$hits*100/($hits+$misses)),"</td>/n", '</tr>', '<tr>', '<td class=td-0><span class="red box"> </span>Used: ',bsize($mem_used ).sprintf(" (%.1f%%)",$mem_used *100/$mem_size),"</td>/n", '<td class=td-1><span class="red box"> </span>Misses: ',$misses.sprintf(" (%.1f%%)",$misses*100/($hits+$misses)),"</td>/n"; echo <<< EOB </tr> </tbody></table><br/> <div class="info"><h2>Cache Information</h2> <table cellspacing=0><tbody> <tr class=tr-0><td class=td-0>Current Items(total)</td><td>$curr_items ($total_items)</td></tr> <tr class=tr-1><td class=td-0>Hits</td><td>{$hits}</td></tr> <tr class=tr-0><td class=td-0>Misses</td><td>{$misses}</td></tr> <tr class=tr-1><td class=td-0>Request Rate (hits, misses)</td><td>$req_rate cache requests/second</td></tr> <tr class=tr-0><td class=td-0>Hit Rate</td><td>$hit_rate cache requests/second</td></tr> <tr class=tr-1><td class=td-0>Miss Rate</td><td>$miss_rate cache requests/second</td></tr> <tr class=tr-0><td class=td-0>Set Rate</td><td>$set_rate cache requests/second</td></tr> </tbody></table> </div>EOB; break; case 2: // variables $m=0; $cacheItems= getCacheItems(); $items = $cacheItems['items']; $totals = $cacheItems['counts']; $maxDump = MAX_ITEM_DUMP; foreach($items as $server => $entries) { echo <<< EOB <div class="info"><table cellspacing=0><tbody> <tr><th colspan="2">$server</th></tr> <tr><th>Slab Id</th><th>Info</th></tr>EOB; foreach($entries as $slabId => $slab) { $dumpUrl = $PHP_SELF.'&op=2&server='.(array_search($server,$MEMCACHE_SERVERS)).'&dumpslab='.$slabId; echo "<tr class=tr-$m>", "<td class=td-0><center>",'<a href="',$dumpUrl,'" rel="external nofollow" >',$slabId,'</a>',"</center></td>", "<td class=td-last><b>Item count:</b> ",$slab['number'],'<br/><b>Age:</b>',duration($time-$slab['age']),'<br/> <b>Evicted:</b>',((isset($slab['evicted']) && $slab['evicted']==1)? 'Yes':'No'); if ((isset($_GET['dumpslab']) && $_GET['dumpslab']==$slabId) && (isset($_GET['server']) && $_GET['server']==array_search($server,$MEMCACHE_SERVERS))){ echo "<br/><b>Items: item</b><br/>"; $items = dumpCacheSlab($server,$slabId,$slab['number']); // maybe someone likes to do a pagination here :) $i=1; foreach($items['ITEM'] as $itemKey=>$itemInfo){ $itemInfo = trim($itemInfo,'[ ]'); echo '<a href="',$PHP_SELF,'&op=4&server=',(array_search($server,$MEMCACHE_SERVERS)),'&key=',base64_encode($itemKey).'" rel="external nofollow" >',$itemKey,'</a>'; if ($i++ % 10 == 0) { echo '<br/>'; } elseif ($i!=$slab['number']+1){ echo ','; } } } echo "</td></tr>"; $m=1-$m; } echo <<<EOB </tbody></table> </div><hr/>EOB;} break; break; case 4: //item dump if (!isset($_GET['key']) || !isset($_GET['server'])){ echo "No key set!"; break; } // I'm not doing anything to check the validity of the key string. // probably an exploit can be written to delete all the files in key=base64_encode("/n/r delete all"). // somebody has to do a fix to this. $theKey = htmlentities(base64_decode($_GET['key'])); $theserver = $MEMCACHE_SERVERS[(int)$_GET['server']]; list($h,$p) = explode(':',$theserver); $r = sendMemcacheCommand($h,$p,'get '.$theKey); echo <<<EOB <div class="info"><table cellspacing=0><tbody> <tr><th>Server<th>Key</th><th>Value</th><th>Delete</th></tr>EOB; echo "<tr><td class=td-0>",$theserver,"</td><td class=td-0>",$theKey, " <br/>flag:",$r['VALUE'][$theKey]['stat']['flag'], " <br/>Size:",bsize($r['VALUE'][$theKey]['stat']['size']), "</td><td>",chunk_split($r['VALUE'][$theKey]['value'],40),"</td>", '<td><a href="',$PHP_SELF,'&op=5&server=',(int)$_GET['server'],'&key=',base64_encode($theKey)," rel="external nofollow" /">Delete</a></td>","</tr>"; echo <<<EOB </tbody></table> </div><hr/>EOB; break; case 5: // item delete if (!isset($_GET['key']) || !isset($_GET['server'])){ echo "No key set!"; break; } $theKey = htmlentities(base64_decode($_GET['key'])); $theserver = $MEMCACHE_SERVERS[(int)$_GET['server']]; list($h,$p) = explode(':',$theserver); $r = sendMemcacheCommand($h,$p,'delete '.$theKey); echo 'Deleting '.$theKey.':'.$r; break; case 6: // flush server $theserver = $MEMCACHE_SERVERS[(int)$_GET['server']]; $r = flushServer($theserver); echo 'Flush '.$theserver.":".$r; break;}echo getFooter();?>
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Linux中fuser命令用法详解
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