varnish

企业CDN缓存系统--varnish(一)

由 巧了我就是萌 提交于 2020-02-19 00:23:14
企业CDN缓存系统–varnish(一) 文章目录 企业CDN缓存系统--varnish(一) 1.CDN缓存系统 - 概念 - CDN的工作原理 2.varnish - 什么是varnish？ - varnish加速器与Squid加速器的对比 - varnish代理服务器的工作方式 - 为什么要使用varnish加速缓存代理服务器？ - varnish加速器的工作流程 1.CDN缓存系统 - 概念 CDN：content distribute network（内容分发网络）或者content delivery network（内容交付网络）。 CDN的任务是将内容从源站传递给用户。 常说的互联网由两层组成： 一层是以TCP/IP为代表的网络层（狭义的互联网internet），另一层是以www为代表的应用层。 过各种网络设备，实现各个计算机之间的互联互通，实现各种信息数据的低成本传输。 举个简单例子来区分而这之间的差异：internet就是铁路轨道和各种信号灯，而www则是运行在internet上的众多火车中的一种。 - CDN的工作原理 无cdn时，用户通过浏览器访问网站的过程 1.用户在浏览器输入URL 2.浏览器向本地DNS请求域名解析 3.如果本地DNS缓存有该域名的解析结果，则直接将解析结果返回给浏览器 4.如果本地DNS缓存中无该域名的解析结果

Linux高级运维：Tomcat服务器 、 Tomcat应用案例和Varnish代理服务器（OPERATION----DAY37）

由 穿精又带淫゛_ 提交于 2020-02-13 13:35:59
Tomcat服务器 概述 Java简介： Java是一种跨平台的、面向对象的程序设计语言，java技术具有卓越的通用性、高效率、平台移植性和安全性。 Java体系 —Java SE（标准版） —Java EE （企业版） JDK简介 JDK(Java Development Kit)是Sun针对Java开发者推出的Java语言的软件开发工具包。 JDK是整个Java的核心 包括了Java运行环境 Java工具（如编译、排错、打包等工具） Java基础的类库 JRE（Java Runtime Environment，Java运行环境），JRE是JDK的子集 JRE包括：Java虚拟机（jvm），Java核心类库和支持文件，不包含开发工具（JDK）—编译器、调试器和其它工具 Java Servlet Servlet是Java扩展Web服务器功能的组件规范 常见Servlet容器 1）IBM 2）WebSphere 3）Oracle 4）weblog 5）Apache 6）Tomcat 7）Redhat 8）Jboss 安装Tomcat 安装部署JDK [root@svr5 ~]# yum -y install java-1.8.0-openjdk [root@svr5 ~]# yum -y install java-1.8.0-openjdk-headles 安装Tomcat

Varnish: Rewrite a URL if response is 404

由 一曲冷凌霜 提交于 2020-02-08 04:44:45
问题 I'm curious if there is a way rewrite a URL if response is a 404, in Varnish 2.1.5? For example. I'd like to pull up a URL, which may or may not exist. If the URL doesn't exist, I'd like to do a URL rewrite and try the new URL instead. I'm new to Varnish and don't completely understand the lifecycle of a request (if anyone knows a guy of article explaining this, please share). I've tried setting some variables and request headers, and checking res.status but they seem to get lost someplace in

varnish, nginx, & node.js: static nginx html pages with node.js fallback

由 雨燕双飞 提交于 2020-01-25 07:34:06
问题 am running varnish on EC2 in front of nginx which routes to node.js. What I would like is to serve specific static HTML pages from certain routes (like, / for index.html ) via nginx, but have all other routes be handled by node.js. As an example, / would be sent by nginx in the form of a static HTML page, while anything not matching, say /dynamic_stuff or /dynamic_stuff2 , would be processed by node.js. In other threads online, other people were putting node.js in a separate dir entirely,

Extracting capturing group contents in Varnish regex

由 浪尽此生 提交于 2020-01-24 22:55:13
问题 I have the following regular expression in Varnish configuration language ^/abc/([a-zA-Z0-9\-\ ]*)-([0-9]+) Now , I want fetch the value $2 part(i.e [0-9]+ ) of regular expression in Varnish. How can I get this value? 回答1: You may use regsub in this case: set req.url = regsub(req.url, "^/abc/([a-zA-Z0-9 -]*)-([0-9]+).*", "\2"); You match the whole string, capture the part you need, and replace with the appropriate backreference. 来源： https://stackoverflow.com/questions/44179243/extracting

Where is the varnish configuration file?

由 人走茶凉 提交于 2020-01-22 11:50:50
问题 I have just installed varnish and its ready to serve web pages. Problem is that we are hitting open files limit. We have already set ulimit to varnish user. We want to find a file where we can write this configuration: # Maximum number of open files NFILES=131072 # Locked shared memory, default log size is 82MB + header MEMLOCK=82000 ## Configuration with VCL # # Listen on port 80, administration on localhost:6082, and forward to # one content server selected by the vcl file, based on the

Where is the varnish configuration file?

由 拟墨画扇 提交于 2020-01-22 11:50:07
问题 I have just installed varnish and its ready to serve web pages. Problem is that we are hitting open files limit. We have already set ulimit to varnish user. We want to find a file where we can write this configuration: # Maximum number of open files NFILES=131072 # Locked shared memory, default log size is 82MB + header MEMLOCK=82000 ## Configuration with VCL # # Listen on port 80, administration on localhost:6082, and forward to # one content server selected by the vcl file, based on the

Where is the varnish configuration file?

由 我怕爱的太早我们不能终老 提交于 2020-01-22 11:48:34
问题 I have just installed varnish and its ready to serve web pages. Problem is that we are hitting open files limit. We have already set ulimit to varnish user. We want to find a file where we can write this configuration: # Maximum number of open files NFILES=131072 # Locked shared memory, default log size is 82MB + header MEMLOCK=82000 ## Configuration with VCL # # Listen on port 80, administration on localhost:6082, and forward to # one content server selected by the vcl file, based on the

Where is the varnish configuration file?

由 南楼画角 提交于 2020-01-22 11:48:14
问题 I have just installed varnish and its ready to serve web pages. Problem is that we are hitting open files limit. We have already set ulimit to varnish user. We want to find a file where we can write this configuration: # Maximum number of open files NFILES=131072 # Locked shared memory, default log size is 82MB + header MEMLOCK=82000 ## Configuration with VCL # # Listen on port 80, administration on localhost:6082, and forward to # one content server selected by the vcl file, based on the

Varnish 4 : Remote Cache

由 血红的双手。 提交于 2020-01-17 05:53:49
问题 Good day. I need some help, I cant get any HIT/MISS response in varnish. please help me.. thanks in advance.. Here is my default.vcl configuration. backend default { .host = "00.00.00.00"; .port = "80"; } sub vcl_recv { if (req.http.host == "www.example.com") { unset req.http.cookie; unset req.http.Vary; } else { return (pass); } } sub vcl_backend_response { set beresp.do_gzip = true; unset beresp.http.Cache-Control; set beresp.ttl = 1h; set beresp.grace = 1w; } sub vcl_deliver { if (obj.hits
订阅 varnish