利用varnish做Discuz论坛的缓存服务器

2024-06-28 13:19:10

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实验背景：公司有一台BBS服务器，用的是LNMP的架构搭建的。正好手头有一台空闲的虚拟机，于是想着给BBS前端加一台缓存服务器。于是选定了varnish，搜了很多教程，跌跌撞撞的完成了配置。这其中很多配置的作用我也不是十分了解，这里先给出大体的配置，之后有时间会研究一下其中配置的原理和具体作用。

实验系统：CentOS 6.4_x86_64

实验前提：防火墙和selinux都关闭

实验说明：本实验共有2台主机，ip分配如拓扑

实验软件：varnish-3.0.7-1　　varnish-libs-3.0.7-1

下载地址：http://pan.baidu.com/s/1hq8hgoO

实验拓扑：

一、安装并配置varnish

　　1.在70.186上直接使用yum安装：

yum -y install varnish-3.0.7-1.el6.x86_64.rpm varnish-libs-3.0.7-1.el6.x86_64.rpm

　　2.编辑/etc/sysconfig/varnish文件：

vim /etc/sysconfig/varnish------------------------------------------------>## Alternative 3, Advanced configurationVARNISH_VCL_CONF=/etc/varnish/default.vcl                                      //使用的vcl文件VARNISH_LISTEN_PORT=80                                                         //varnish自己监听的端口VARNISH_ADMIN_LISTEN_ADDRESS=127.0.0.1                                        //admin管理接口使用的ipVARNISH_ADMIN_LISTEN_PORT=6082                                                //admin管理接口使用的端口VARNISH_SECRET_FILE=/etc/varnish/secret                                       //密码文件VARNISH_MIN_THREADS=50                                                        //最小进程数VARNISH_MAX_THREADS=1000                                                      //最大进程数VARNISH_THREAD_TIMEOUT=120                                                    //超过此时间回收空闲进程VARNISH_STORAGE_SIZE=1G                                                      //存储文件大小VARNISH_STORAGE="malloc,${VARNISH_STORAGE_SIZE}"                             //指明使用存储的类型及文件VARNISH_TTL=120DAEMON_OPTS="-a ${VARNISH_LISTEN_ADDRESS}:${VARNISH_LISTEN_PORT} /             -f ${VARNISH_VCL_CONF} /             -T ${VARNISH_ADMIN_LISTEN_ADDRESS}:${VARNISH_ADMIN_LISTEN_PORT} /             -t ${VARNISH_TTL} /             -w ${VARNISH_MIN_THREADS},${VARNISH_MAX_THREADS},${VARNISH_THREAD_TIMEOUT} /             -u varnish -g varnish /             -S ${VARNISH_SECRET_FILE} /             -s ${VARNISH_STORAGE}"

　　3.编辑vcl文件：

vim /etc/varnish/default.vcl--------------------------------------------------------->backend default {  .host = "192.168.90.186";  .port = "80";}acl local { "localhost"; "127.0.0.1";} sub vcl_recv {     if (req.restarts == 0) {     if (req.http.x-forwarded-for) {         set req.http.X-Forwarded-For =         req.http.X-Forwarded-For + ", " + client.ip;     } else {         set req.http.X-Forwarded-For = client.ip;     }     }     if(req.request == "PURGE") {       if (!client.ip ~ local) {         error 405 "Not Allowed.";       }       return (lookup);     }      if (req.request == "GET" && req.url ~ "/.(jpg|png|gif|swf|jpeg|flv|bmp|gz|tgz|bz2|tbz|js|CSS|ico)$") {       unset req.http.cookie;     }     if (req.request == "GET" && req.url ~ "/.(js|css).*$") {       unset req.http.cookie;     }     if (req.url ~ "^/images") {       unset req.http.cookie;     }       if (req.request != "GET" &&       req.request != "HEAD" &&       req.request != "PUT" &&       req.request != "POST" &&       req.request != "TRACE" &&       req.request != "OPTIONS" &&       req.request != "DELETE") {         return (pipe);     }     if (req.request != "GET" && req.request != "HEAD") {         return (pass);     }     if (req.http.Authorization || req.http.Cookie) {         return (pass);     }     if (req.request == "GET" && req.url ~ "/.(php)($|/?)") {         return (pass);     }     return (lookup); } sub vcl_pipe {     return (pipe); } sub vcl_pass {     if (req.request == "PURGE") {    error 502 "PURGE on a passed object";     }     return (pass); } sub vcl_hash {     hash_data(req.url);     if (req.http.host) {         hash_data(req.http.host);     } else {         hash_data(server.ip);     }     return (hash); } sub vcl_hit {     if (!obj.ttl > 0s) {       return (pass);     }     if (req.request == "PURGE") {         purge;         error 200 "Purged.";     }     return (deliver); } sub vcl_miss {     if (req.request == "PURGE") {    purge;    error 404 "Not in cache";     }     return (fetch); } sub vcl_fetch {     if (beresp.ttl <= 0s ||         beresp.http.Set-Cookie ||         beresp.http.Vary == "*") {          set beresp.ttl = 120 s;          return (hit_for_pass);     }      if (beresp.http.PRagma ~ "no-cache" ||          beresp.http.Cache-Control ~ "no-cache" ||          beresp.http.Cache-Control ~ "private") {          return (hit_for_pass);      }      if (req.request == "GET" && req.url ~ "/.(bmp|jpeg|jpg|png|gif|svg|png|ico|txt|css|js|html|htm)$") {          unset beresp.http.set-cookie;          set beresp.ttl = 1h;      } else {          set beresp.ttl = 1800s;      }     return (deliver); } sub vcl_deliver {     if (obj.hits > 0) {    set resp.http.X-Cache = "Hit Via" + " " + server.hostname;     } else {        set resp.http.X-Cache = "Miss Via" + " " + server.hostname;     }     return (deliver); } sub vcl_init {     return (ok); } sub vcl_fini {     return (ok); }

　　4.启动varnish，查看端口，并打开浏览器测试：