php显示memcache状态(nginx+php fastcgi)

#开始前删除相关程序 yum remove httpd* php* #添加php53源 wget http://dl.iuscommunity.org/pub/ius/stable/CentOS/5/x86_64/epel-release-5-4.noarch.rpm wget http://dl.iuscommunity.org/pub/ius/stable/CentOS/5/x86_64/ius-release-1.0-11.ius.centos5.noarch.rpm rpm -Uvh epel-release-5-4.noarch.rpm rpm -Uvh ius-release-1.0-11.ius.centos5.noarch.rpm #安装php53u等…… yum install php53u php53u-pecl-memcache chkconfig --level 345 php-fpm on /etc/init.d/php-fpm restart #修改/usr/local/nginx/conf/fastcgi_params文件添加一行 fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name; #修改/etc/php-fpm.d/www.conf 文件用户和组与nginx相同 ; RPM: apache Choosed to be able to access some dir as httpd user = www ; RPM: Keep a group allowed to write in log dir. group = www #在需要解析php的server下添加location location ~ .*\.php$ { # root /var/www/html; fastcgi_pass 127.0.0.1:9000; fastcgi_index index.php; fastcgi_param SCRIPT_FILENAME /var/www/html$fastcgi_script_name; #/var/www/html可以写成$document_root相当如上面root的部分 include fastcgi_params; }

附上memcache.php

                       |
  +----------------------------------------------------------------------+
*/

$VERSION='$Id: memcache.php,v 1.1.2.3 2008/08/28 18:07:54 mikl Exp $';

define('ADMIN_USERNAME','memcache');    // Admin Username
define('ADMIN_PASSWORD','password');    // Admin Password
define('DATE_FORMAT','Y/m/d H:i:s');
define('GRAPH_SIZE',200);
define('MAX_ITEM_DUMP',50);

$MEMCACHE_SERVERS[] = '192.168.100.70:11211'; // add more as an array
//$MEMCACHE_SERVERS[] = 'mymemcache-server2:11211'; // add more as an array


// 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 <<
                                
Rejected!
                                Wrong Username or Password!
                                
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 "
$title
";
        }
        return "
$title
";
}

function getHeader(){
    $header = <<






        

                memcache
                memcache.php by Harun Yayli
        
        



EOB;

    return $header;
}
function getFooter(){
    global $VERSION;
    $footer = '


';

    return $footer;

}
function getMenu(){
    global $PHP_SELF;
echo "
";
if ($_GET['op']!=4){
echo <<Refresh Data
EOB;
}
else {
echo <<Back
EOB;
}
echo
        menu_entry(1,'View Host Stats'),
        menu_entry(2,'Variables');

echo <<
        

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'] $y) imagefilledrectangle($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
                
General Cache Information
                
EOB;
                echo "\n";
                echo "\n";

        echo <<

                
PHP Version
$phpversion
Memcached Host". ((count($MEMCACHE_SERVERS)>1) ? 's':'')."
";
                $i=0;
                if (!isset($_GET['singleout']) && count($MEMCACHE_SERVERS)>1){
                foreach($MEMCACHE_SERVERS as $server){
                      echo ($i+1).'. '.$server.'
';
                }
                }
                else{
                    echo '1.'.$MEMCACHE_SERVERS[0];
                }
                if (isset($_GET['singleout'])){
                      echo '(all servers)
';
                }
                echo "
Total Memcache Cache
".bsize($memcacheStats['limit_maxbytes'])."
                

                
Memcache Server Information
EOB;
        foreach($MEMCACHE_SERVERS as $server){
            echo '';
            echo '';
                echo '';
                echo '';
                echo '';
                echo '';
                echo '';
                echo '
'.$server.'
[Flush this server]
Start Time
',date(DATE_FORMAT,$memcacheStatsSingle[$server]['STAT']['time']-$memcacheStatsSingle[$server]['STAT']['uptime']),'
Uptime
',duration($memcacheStatsSingle[$server]['STAT']['time']-$memcacheStatsSingle[$server]['STAT']['uptime']),'
Memcached Server Version
'.$memcacheStatsSingle[$server]['STAT']['version'].'
Used Cache Size
',bsize($memcacheStatsSingle[$server]['STAT']['bytes']),'
Total Cache Size
',bsize($memcacheStatsSingle[$server]['STAT']['limit_maxbytes']),'
';
           }
    echo <<
                
Host Status Diagrams
                
EOB;

        $size='width='.(GRAPH_SIZE+50).' height='.(GRAPH_SIZE+10);
        echo <<
                
EOB;

        echo
                graphics_avail() ?
                          ''.
                          "".
                          "\n"
                        : "",
                '',
                '\n",
                '\n",
                '',
                '',
                '\n",
                '\n";
                echo <<< EOB
        
Cache Usage
                
Hits & Misses
                
 Free: ',bsize($mem_avail).sprintf(" (%.1f%%)",$mem_avail*100/$mem_size),"
 Hits: ',$hits.sprintf(" (%.1f%%)",$hits*100/($hits+$misses)),"
 Used: ',bsize($mem_used ).sprintf(" (%.1f%%)",$mem_used *100/$mem_size),"
 Misses: ',$misses.sprintf(" (%.1f%%)",$misses*100/($hits+$misses)),"
        


        
Cache Information
                

                
Current Items(total)
$curr_items ($total_items)
                
Hits
{$hits}
                
Misses
{$misses}
                
Request Rate (hits, misses)
$req_rate cache requests/second
                
Hit Rate
$hit_rate cache requests/second
                
Miss Rate
$miss_rate cache requests/second
                
Set Rate
$set_rate cache requests/second
                
                

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

                        

EOB;

                        foreach($entries as $slabId => $slab) {
                            $dumpUrl = $PHP_SELF.'&op=2&server='.(array_search($server,$MEMCACHE_SERVERS)).'&dumpslab='.$slabId;
                                echo
                                        "",
                                        "",
                                        "";
                                $m=1-$m;
                        }
                echo <<

                        
$server
                        
Slab Id
Info
",'',$slabId,'',"
Item count: ",$slab['number'],'
Age:',duration($time-$slab['age']),'
 Evicted:',((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 "
Items: item
";
                                            $items = dumpCacheSlab($server,$slabId,$slab['number']);
                        // maybe someone likes to do a pagination here :)
                                            $i=1;
                        foreach($items['ITEM'] as $itemKey=>$itemInfo){
                            $itemInfo = trim($itemInfo,'[ ]');


                            echo '',$itemKey,'';
                            if ($i++ % 10 == 0) {
                                echo '
';
                            }
                            elseif ($i!=$slab['number']+1){
                                echo ',';
                            }
                        }
                                        }

                                        echo "
                        

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;
        echo "",
             '","";
        echo <<

                        
Server
Key
Value
Delete
",$theserver,"
",$theKey,
             " 
flag:",$r['VALUE'][$theKey]['stat']['flag'],
             " 
Size:",bsize($r['VALUE'][$theKey]['stat']['size']),
             "
",chunk_split($r['VALUE'][$theKey]['value'],40),"
Delete
                        

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();

?>

说了这么多，简要总结如下： 

• Memcached的Key，要杜绝使用空格，且长度控制在250个字符。
• Memcached的Value，要控制体积，必须小于1MB，必要时进行使用压缩。
• 失效时间，0为永久有效，最大值不得超过30天（2592000s），否则重新计算可能缓存只有1秒
• Memcached仅支持LRU算法，完全适用你的需要。
• 尽量不要将List这种重体积对象扔到Memcached中，传输、存储都会产生瓶颈。
• 使用一致性哈希算法实现，提高多个Memcacehd Server利用率。

如何应对高并发： 应对高并发攻击

获取运行状态
echo stats | nc 192.168.1.123 11200
watch "echo stats | nc 192.168.1.123 11200" (实时状态)