基于Nginx的Mencached缓存配置详解
程序员文章站
2022-06-25 18:28:58
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（c...
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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