上一弹中我们规划并搭建了基本的架构组成,当然此架构存在诸多问题,我们在接下来的章节中将不断
完善其功能特性,使之成为实至名归的百万PV架构站点
首先来对上一弹架构做基本的ab 并发100, 总量2000的测试,让我们对站点性能有所熟知,之后在之前的功能上我们添加多道
缓存对性能进行提升. (ps: 测试机器均为虚拟机环境 , 大约性能比主流服务器低 2.5 - 3.5 倍 , 测试参
数可做此对比评估)
按照规划,我们在salve3.king.com中添加两实例的varnish,在slave4.king.com中添加memcache实现
session信息共享. 本期架构图如下,可与第一弹做对比学习 日均百万PV架构第一弹(基本架构搭建)
操作:
i) 安装配置varnish实现静态内容缓存
1. 准备如下文件(slave3.king.com) varnish-3.0.4-1.el6.x86_64.rpm varnish-docs-3.0.4-1.el6.x86_64.rpm varnish-libs-3.0.4-1.el6.x86_64.rpm varnish-libs-devel-3.0.4-1.el6.x86_64.rpm rpm -ivh varnish*.rpm
2. 配置varnish(slave3.king.com) vim /etc/sysconfig/varnish VARNISH_STORAGE="malloc,100M" # vim /etc/varnish/default.vcl backend imgs1 { .host = "imgs1.king.com"; .port = "80"; } # backend imgs2 { .host = "imgs2.king.com"; .port = "80"; } # sub vcl_recv { # 由于前端的haproxy已经做了负载均衡,这里直接按请求原路径处理 if (req.http.host == "imgs1.king.com") { set req.backend = imgs1; } else { set req.backend = imgs2; } return(lookup); } # sub vcl_deliver { set resp.http.X-Age = resp.http.Age; unset resp.http.Age; # if (obj.hits > 0) { set resp.http.X-Cache = "HIT via " + server.hostname; } else { set resp.http.X-Cache = "MISS"; } }
3. 配置haproxy将流量转向varnish(slave1.king.com , slave2.king.com) vim /etc/haproxy/haproxy.cfg backend img_servers balance roundrobin server imgsrv1 imgs1.king.com:6081 check maxconn 4000 server imgsrv2 imgs2.king.com:6081 check maxconn 4000
4. 更改文本内容的设置 如上过程,也可以使用同一个varnish(略)
加入缓存后,站点测试
加入缓存后的ab 并发100 总量2000 测试
ii) 安装配置memcache实现session共享
1. 安装memcache(slave4.king.com) ################## 1. 解决依赖 #################### tar xf libevent-2.0.21-stable.tar.gz cd libevent-2.0.21-stable ./configure --prefix=/usr/local/libevent make && make install echo "/usr/local/libevent/lib" > /etc/ld.so.conf.d/libevent.conf ldconfig ################## 2. 安装memcached #################### tar xf memcached-1.4.15.tar.gz cd memcached-1.4.15 ./configure --prefix=/usr/local/memcached --with-libevent=/usr/local/libevent make && make install ###### 3. 提供启动脚本(/etc/init.d/memcached) ########### #!/bin/bash # # Init file for memcached # # chkconfig: - 86 14 # description: Distributed memory caching daemon # # processname: memcached # config: /etc/sysconfig/memcached # . /etc/rc.d/init.d/functions # ## Default variables PORT="11211" USER="nobody" MAXCONN="1024" CACHESIZE="64" # RETVAL=0 prog="/usr/local/memcached/bin/memcached" desc="Distributed memory caching" lockfile="/var/lock/subsys/memcached" # start() { echo -n $"Starting $desc (memcached): " daemon $prog -d -p $PORT -u $USER -c $MAXCONN -m $CACHESIZE RETVAL=$? [ $RETVAL -eq 0 ] && success && touch $lockfile || failure echo return $RETVAL } # stop() { echo -n $"Shutting down $desc (memcached): " killproc $prog RETVAL=$? [ $RETVAL -eq 0 ] && success && rm -f $lockfile || failure echo return $RETVAL } # restart() { stop start } # reload() { echo -n $"Reloading $desc ($prog): " killproc $prog -HUP RETVAL=$? [ $RETVAL -eq 0 ] && success || failure echo return $RETVAL } # case "$1" in start) start ;; stop) stop ;; restart) restart ;; condrestart) [ -e $lockfile ] && restart RETVAL=$? ;; reload) reload ;; status) status $prog RETVAL=$? ;; *) echo $"Usage: $0 {start|stop|restart|condrestart|status}" RETVAL=1 esac # exit $RETVAL ################# 4. 配置脚本 #################### chmod +x /etc/init.d/memcached chkconfig --add memcached service memcached start
2. 配置php支持memcache(slave3.king.com , slave4.king.com) tar xf memcache-2.2.7.tgz cd memcache-2.2.7 /usr/local/php/bin/phpize ./configure --enable-memcache --with-php-config=/usr/local/php/bin/php-config make && make install # 安装结束时,会出现类似如下行, 将后半句复制 Installing shared extensions: /usr/local/php/lib/php/extensions/no-debug-non-zts-20100525/memcache.so # 编辑/etc/php.ini,在“dynamically loaded extension”相关的位置添加如下一行来载入memcache扩展: extension=/usr/local/php/lib/php/extensions/no-debug-non-zts-20100525/memcache.so
3. 实现session共享(slave3.king.com , slave4.king.com) 编辑php.ini文件,确保如下两个参数的值分别如下所示: session.save_handler = memcache session.save_path = "tcp://172.16.43.4:11211?persistent=1&weight=1&timeout=1&retry_interval=15" 最后重启 slave3.king.com , slave4.king.com 的 php-fpm 服务
4. 测试 新建php页面 /nfsshared/html/setsess.php,为客户端设置启用session: <?php session_start(); if (!isset($_SESSION[‘www.king.com‘])) { $_SESSION[‘www.king.com‘] = time(); } print $_SESSION[‘www.king.com‘]; print "<br><br>"; print "Session ID: " . session_id(); ?> # 新建php页面 /nfsshared/html/showsess.php,获取当前用户的会话ID: <?php session_start(); $memcache_obj = new Memcache; $memcache_obj->connect(‘172.16.43.4‘, 11211); $mysess=session_id(); var_dump($memcache_obj->get($mysess)); $memcache_obj->close(); ?>
加入memcache后, 反复刷新www.king.com在dns轮询,haproxy的调度算法下, 存储在memcache
中的session没有改变,证明session共享成功
日均百万PV架构第二弹(缓存时代来临)
时间: 2024-10-05 06:17:06