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
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[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
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#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
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[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
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[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
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#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 ). " " ); header( 'Content-Type:file' . " " ); header( 'X-cache:MISS:' . " " ); echo $data ; } #不存在demo文件夹则返回首页 else { header( 'Location:../index.html' . " " ); } ?> |
注:bak机器进行相同的设置
测试验证
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#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." ");
- $buf='';
- while ((!feof($s))) {
- $buf .= fgets($s, 256);
- if (strpos($buf,"END ")!==false){ // stat says end
- break;
- }
- if (strpos($buf,"DELETED ")!==false || strpos($buf,"NOT_FOUND ")!==false){ // delete says these
- break;
- }
- if (strpos($buf,"OK ")!==false){ // flush_all says ok
- break;
- }
- }
- fclose($s);
- return parseMemcacheResults($buf);
- }
- function parseMemcacheResults($str){
- $res = array();
- $lines = explode(" ",$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> ";
- echo "<tr class=tr-1><td class=td-0>Total Memcache Cache</td><td>".bsize($memcacheStats['limit_maxbytes'])."</td></tr> ";
- echo <<<EOB
- </tbody></table>
- </div>
- <div class="info div1"><h2>Memcache Server Information</h2>
- EOB;
- foreach($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'].'&':'')."$time"></td></tr> "
- : "",
- '<tr>',
- '<td class=td-0><span class="green box"> </span>Free: ',bsize($mem_avail).sprintf(" (%.1f%%)",$mem_avail*100/$mem_size),"</td> ",
- '<td class=td-1><span class="green box"> </span>Hits: ',$hits.sprintf(" (%.1f%%)",$hits*100/($hits+$misses)),"</td> ",
- '</tr>',
- '<tr>',
- '<td class=td-0><span class="red box"> </span>Used: ',bsize($mem_used ).sprintf(" (%.1f%%)",$mem_used *100/$mem_size),"</td> ",
- '<td class=td-1><span class="red box"> </span>Misses: ',$misses.sprintf(" (%.1f%%)",$misses*100/($hits+$misses)),"</td> ";
- echo <<< EOB
- </tr>
- </tbody></table>
- <br/>
- <div class="info"><h2>Cache Information</h2>
- <table cellspacing=0><tbody>
- <tr class=tr-0><td class=td-0>Current Items(total)</td><td>$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(" 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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原文链接:https://blog.51cto.com/14832653/2506978