7.11 如何应用Varnish

 

动态数据缓存

Step 1 修改devault.vcl文件

# This is a basic VCL configuration file for varnish.  See the vcl(7)
# man page for details on VCL syntax and semantics.
# 
# Default backend definition.  Set this to point to your content
# server.
# 
import std;
 backend b1 {
     .host = "127.0.0.1";
     .port = "8080";
     .connect_timeout = 1s;
     .first_byte_timeout = 5s;
     .between_bytes_timeout = 2s;
 }

 backend b2{
    .host = "127.0.0.1";
    .port = "9080";
    .connect_timeout = 1s;
    .first_byte_timeout = 5s;
    .between_bytes_timeout = 2s;
}
 director d1 round-robin {
#    .retries = 5;
    {
        .backend = b1;
#        .weight = 7;
    }
    {
        .backend = b2;
#        .weight = 3;
    }
}



# ac1 purgeallow {
#    "127.0.0.1";
# }
# 
# Below is a commented-out copy of the default VCL logic.  If you
# redefine any of these subroutines, the built-in logic will be
# appended to your code.
 sub vcl_recv {
    set req.backend=d1;
    if(!req.backend.healthy){
        set req.grace = 30m;
    }else{
        set req.grace = 5s;
    }
     if(req.request == "PURGE"){
        # if(!client.ip ~ purgeallow){
        #    error 405 "not allowed.";
        # }
        return(lookup);
     }    
     if(req.request == "GET" && req.url ~ "\.(css|htm|html|js|jpg|png|gif|swf|flv|ico|jpeg)$"){
    #    set req.backend=b1;
        unset req.http.cookie;
     }

     if(req.request == "GET" && req.url ~ "(?!)\.jsp($|\?)"){
    #    set req.backend=b2;
        return(pass);
     }
     if (req.restarts == 0) {
        if (req.http.x-forwarded-for) {
            set req.http.X-Forwarded-For =
            req.http.X-Forwarded-For + ", " + client.ip;
        } else {
            set req.http.X-Forwarded-For = client.ip;
        }
     }
     # 缓存动态数据部分
     if ((req.url ~ "^.*/toIndex$") || (req.url ~ "^.*/toGoodsDesc/.*")) {
         return(lookup);
     }
     
     if (req.request != "GET" &&
       req.request != "HEAD" &&
       req.request != "PUT" &&
       req.request != "POST" &&
       req.request != "TRACE" &&
       req.request != "OPTIONS" &&
       req.request != "DELETE") {
         /* Non-RFC2616 or CONNECT which is weird. */
         return (pipe);
     }
     if (req.request != "GET" && req.request != "HEAD") {
         /* We only deal with GET and HEAD by default */
         return (pass);
     }
     if (req.http.Authorization || req.http.Cookie) {
         /* Not cacheable by default */
         return (pass);
     }
     return (lookup);
 }
 
 sub vcl_pipe {
#     # Note that only the first request to the backend will have
#     # X-Forwarded-For set.  If you use X-Forwarded-For and want to
#     # have it set for all requests, make sure to have:
#     # set bereq.http.connection = "close";
#     # here.  It is not set by default as it might break some broken web
#     # applications, like IIS with NTLM authentication.
     return (pipe);
 }
# 
 sub vcl_pass {
     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 {
     return (deliver);
 }
# 
 sub vcl_miss {
     std.log("url miss! the url="+req.url);    
     return (fetch);
 }
# 
 sub vcl_fetch {
     set beresp.grace = 50m;
    
    if (beresp.status == 500){
        set beresp.saintmode = 10s;
        return (restart);
    }
    # 缓存动态数据部分
    if (req.request == "GET" && req.url ~ "\.(jpg|png|gif|swf|flv|ico|jpeg)$") {
        set beresp.ttl = 1d;
    }
　　 # 缓存动态数据部分
    if (req.request == "GET" && req.url ~ "\.(css|js|htm|html)$") {
        set beresp.ttl = 1d;
    }
　　 # 缓存动态数据部分
    if (req.url ~ "^.*/toIndex$") {
         set beresp.ttl = 3m;
        return(deliver);
    }
　　 # 缓存动态数据部分
    if (req.url ~ "^.*/toGoodsDesc/.*") {
         set beresp.ttl = 1d;
        return(deliver);
    }
    
     if (beresp.ttl <= 0s ||
         beresp.http.Set-Cookie ||
         beresp.http.Vary == "*") {
#         /*
#          * Mark as "Hit-For-Pass" for the next 2 minutes
#          */
         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(deliver);
     }
     if (beresp.status == 404 || beresp.status == 300) {
        error 404;
     }
     return (deliver);
 }
# 
 sub vcl_deliver {
    
    if (obj.hits > 0) {
        set resp.http.X-Cache = "cached";
    } else {
        set resp.http.X-Cache = "uncached";
    }
    unset resp.http.X-Powered-By;
    
    unset resp.http.Server;
    
     return (deliver);
 }
# 
# sub vcl_error {
#     set obj.http.Content-Type = "text/html; charset=utf-8";
#     set obj.http.Retry-After = "5";
#     synthetic {"
# <?xml version="1.0" encoding="utf-8"?>
# <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
#  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
# <html>
#   <head>
#     <title>"} + obj.status + " " + obj.response + {"</title>
#   </head>
#   <body>
#     <h1>Error "} + obj.status + " " + obj.response + {"</h1>
#     <p>"} + obj.response + {"</p>
#     <h3>Guru Meditation:</h3>
#     <p>XID: "} + req.xid + {"</p>
#     <hr>
#     <p>Varnish cache server</p>
#   </body>
# </html>
# "};
#     return (deliver);
# }
# 
 sub vcl_init {
     return (ok);
 }
# 
 sub vcl_fini {
     return (ok);
 }

检测

第一次请求

第二次请求

304 Not Modifed （浏览器缓存）

Nginx + Varnish + 基本业务

Step 1 ，修改配置.nginx.conf 文件

user  root;
worker_processes  1;

error_log  logs/error.log crit;
#error_log  logs/error.log  notice;
#error_log  logs/error.log  info;

pid        logs/nginx.pid;


events {
        use epoll;
    worker_connections  1024;
}


http {
    include       mime.types;
    include               ccproxy.conf;
    default_type  application/octet-stream;

    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    access_log  logs/access.log  main;

        server_names_hash_bucket_size 256;

        client_body_buffer_size 128k;
        client_header_buffer_size 8k;
        client_max_body_size 50m;
        client_header_timeout 1m;
        large_client_header_buffers 4 8k;

        send_timeout 3m;

        sendfile        on;
    tcp_nopush     on;
        tcp_nodelay on;
    #keepalive_timeout  0;
    keepalive_timeout  120;

    gzip  on;
        gzip_min_length 1k;
        gzip_buffers 4 16k;
        gzip_http_version 1.1;
        gzip_comp_level 2;
        gzip_types text/plain application/x-javascript text/css application/xml;
        gzip_vary on;

        upstream cctest1.com{
                server 127.0.0.1:9080;
                server 172.0.0.1:8080;
        }
        upstream cctest2.com {
                server 127.0.0.1:1111;
        }
    server {
        listen       80;
        server_name  ccserver1;

        #charset koi8-r;

        access_log  logs/host.access.log  main;

        index index.html index.htm index.jsp;

        root /usr/tomcat-8.0.0-RC5-1/webapps/ROOT;

        #location ~* ^/architecture1web/.*\.(jpg|jpeg|gif|png|swf|ico)$ {
        #       root /usr/tomcat-8.0.0-RC5-1/webapps;
        #}

        #location ~* ^/architecture1web/.*\.(html|htm|js|css)$ {
        #       root /usr/tomcat-8.0.0-RC5-1/webapps;
        #}


        #location ~* .*\.(jpg|jpeg|gif|png|swf|ico)$ {

        #       if (-f $request_filename){
        #               break;
        #       }

        #}

        #location ~* .*\.(html|htm|js|css)$ {
        #       # express id;
        #}

        location / {
                proxy_pass      http://cctest2.com;
         #   root   html;
         #   index  index.html index.htm;
        }

        #error_page  404              /404.html;

        # redirect server error pages to the static page /50x.html
        #
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
                        internal;
            root  errors/html;
        }

        # proxy the PHP scripts to Apache listening on 127.0.0.1:80
        #
        #location ~ \.php$ {
        #    proxy_pass   http://127.0.0.1;
        #}

        # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
        #
        #location ~ \.php$ {
        #    root           html;
        #    fastcgi_pass   127.0.0.1:9000;
        #    fastcgi_index  index.php;
        #    fastcgi_param  SCRIPT_FILENAME  /scripts$fastcgi_script_name;
        #    include        fastcgi_params;
        #}

        # deny access to .htaccess files, if Apache's document root
        # concurs with nginx's one
        #
        #location ~ /\.ht {
        #    deny  all;
        #}
    }


    # another virtual host using mix of IP-, name-, and port-based configuration
    #
    #server {
    #    listen       8000;
    #    listen       somename:8080;
    #    server_name  somename  alias  another.alias;

    #    location / {
    #        root   html;
    #        index  index.html index.htm;
    #    }
    #}


    # HTTPS server
    #
    #server {
    #    listen       443 ssl;
    #    server_name  localhost;

    #    ssl_certificate      cert.pem;
    #    ssl_certificate_key  cert.key;

    #    ssl_session_cache    shared:SSL:1m;
    #    ssl_session_timeout  5m;

    #    ssl_ciphers  HIGH:!aNULL:!MD5;
    #    ssl_prefer_server_ciphers  on;

    #    location / {
    #        root   html;
    #        index  index.html index.htm;
    #    }
    #}

}

修改部分

 运行检查