varnish配置文件

最新推荐文章于 2023-06-13 15:57:59 发布

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本文详细介绍了Varnish缓存系统的基本配置文件结构，包括后端服务器定义、负载均衡策略、访问控制列表和缓存操作流程。通过具体实例展示了如何设置多个后端服务器及其权重，以及如何进行缓存命中、未命中和删除操作。

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.

backend webserver1 {
.host = “192.168.1.127”;
.port = “80”;
}
backend webserver2 {
.host = “192.168.1.128”;
.port = “80”;
}
backend webserver3 {
.host = “192.168.1.132”;
.port = “80”;
}
backend webserver4 {
.host = “192.168.1.131”;
.port = “80”;
}
director webserver random {
{.backend = webserver1; .weight = 5;}
{.backend = webserver2; .weight = 8;}
{.backend = webserver3; .weight = 5;}
{.backend = webserver4; .weight = 10;}
}

acl purge {
“localhost”;
“127.0.0.1”;
“192.168.1.0”/24;
}

sub vcl_recv {
if (req.request == “PURGE”){
if (!client.ip ~ purge) {
error 405 “NOT ALLOWED.”;
}
elseif (req.url ~ “.(php|cgi)( $KaTeX parse error: Expected 'EOF', got '\?' at position 2: |\̲?̲)") { retur…$ |?)”) {
return (pass);
}
elseif (req.http.Authenticate || req.http.Authorization) {
return (pass);
}
return (lookup);
}

sub vcl_hit {
if (req.request == “PURGE”) {
set obj.ttl = 0s;
error 200 “Purged.”;
}
if (!obj.cacheable) {
return (pass);
}
if (obj.http.Vary) {
unset obj.http.Vary;
}
}

sub vcl_miss {
if (req.request == “PURGE”) {
error 404 “Not in cache.”;
}
}

sub vcl_hash {
set req.hash += req.url;
if (req.http.host) {
set req.hash += req.http.host;
}else{
set req.hash += server.ip;
}
if (req.http.Accept-Encoding) {
if (req.url ~ “.(jpg|jpeg|png|gif|rar|zip|gz|tgz|bz2|mp3) $KaTeX parse error: Expected 'EOF', got '}' at position 54: \dotspt-Encoding; } }̲ return (ha\dots$ ”) {
set beresp.ttl = 300s;
}
if (req.request == “GET” && req.url ~ “.(gif|jpg|jpeg|bmp|ico|png) $KaTeX parse error: Expected 'EOF', got '&' at position 65: …quest == "GET" &̲& req.url ~ "\.…$ ”) {
set beresp.ttl = 10d;
}
return (deliver);
}

sub vcl_deliver {
if (obj.hits >0) {
set resp.http.X-Cache = “HIT www.guo.com”;
}else {
set resp.http.X-Cache = “MISS www.guo.com”;
}
return (deliver);
}