这篇文章主要介绍了基于Nginx的Mencached缓存配置详解,文中通过示例代码介绍的非常详细,对大家的学习或者工作具有一定的参考学习价值,需要的朋友们下面随着小编来一起学习学习吧
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 11211 Trying 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/libmemcached make && 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.ini extension=memcached.so
测试验证
[root@master ~]# vi /usr/local/nginx/html/test.php <?php phpinfo(); ?>
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.conf worker_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.html HTTP/1.1 200 OK Server: nginx/1.16.1 Date: Thu, 25 Jun 2020 02:23:00 GMT Content-Type: file Content-Length: 4 Connection: keep-alive X-Powered-By: PHP/7.2.26 X-cache: MISS: [root@bak ~]# curl -I http://192.168.29.132/demo/123.html HTTP/1.1 200 OK Server: nginx/1.16.1 Date: Thu, 25 Jun 2020 02:23:01 GMT Content-Type: text/html Content-Length: 4 Connection: keep-alive X-mem-key: /demo/123.html Accept-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.html HTTP/1.1 200 OK Server: nginx/1.16.1 Date: Thu, 25 Jun 2020 02:29:46 GMT Content-Type: text/html Content-Length: 4 Connection: keep-alive X-mem-key: /demo/123.html Accept-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 $resp; } ////////////////////////////////////////////////////// // // don\'t cache this page // header(\"Cache-Control: no-store, no-cache, must-revalidate\"); // HTTP/1.1 header(\"Cache-Control: post-check=0, pre-check=0\", false); header(\"Pragma: no-cache\"); // HTTP/1.0 function duration($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,$k); } // create menu entry function menu_entry($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.\'?\'; $time = time(); // sanitize _GET foreach($_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[$_GET[\'singleout\']]); } // display images if (isset($_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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