Simple setup of Varnish in RedHatLinux7

Host environment rhel6selinuxandiptablesdisabled lab host 172.25.254.2varnish172.25.254.3apache &

Host environment rhel6 selinux and iptables disabled
Lab host 172.25.254.2 varnish
172.25.254.3 apache
172.25.254.4 apache

First obtain the two packages
Varnish-3.0.5-1.el6.x86_64.rpm varnish-libs-3.0.5-1.el6.x86_64.rpm
Install
Yum install varnish-*-y

### Configure a backend server

Vim/etc/varnish/default. vcl

Backend xp1 {
. Host = "172.25.254.3 ";
. Port = "80 ";
}
3 is the backend. Create a homepage for testing.
### Configure the varnish service port
VARNISH_LISTEN_PORT = 80
/Etc/init. d/varnish restart

Add the following code in vcl to make the test display clearer:
Sub vcl_deliver {
If (obj. hits> 0 ){
Set resp. http. X-Cache = "HIT from xp1 cache ";
}
Else {
Set resp. http. X-Cache = "MISS from xp1 cache ";
}
Return (deliver );
}
/Etc/init. d/varnish restart

### Test cache hit
On 4
[Root @ vm4 ~] # Curl 172.25.254.2
Haha-vm3

Age is followed by time. The default value is 120.
HIT indicates that if MISS is HIT, the query is performed at the backend.

### Manually clear the cache through varnishadm
# Varnishadm ban. url. * $
# Clear all
# Varnishadm ban. url/index.html
# Clear index.html page Cache
# Varnishadm ban. url/admin/$
# Clear admin directory Cache

### Define backend servers for multiple sites with different domain names
Backend xp1 {
. Host = "172.25.39.3 ";
. Port = "80 ";
}
Backend xp2 {
. Host = "172.25.39.4 ";
. Port = "80 ";
}

# When accessing the www.linuxidc.org domain name, retrieve data from xp1 and access the bbs.linuxidc.org domain name to xp2. An error is returned when accessing other pages.
Sub vcl_recv {
If (req. http. host ~ "^ (Www .)? Linuxidc.com "){
Set req. http. host = "www.linuxidc.com ";
Set req. backend = xp1;
} Elsif (req. http. host ~ "^ Bbs.linuxidc.com "){
Set req. backend = xp2;
} Else {error 404 "linuxidc cache ";
}
}

### Define Server Load balancer
Director lb round-robin {
{. Backend = xp1 ;}
{. Backend = xp2 ;}
}
The rr algorithm is used above. There are other algorithms such as hash, fallback, and random.

Sub vcl_recv {
If (req. http. host ~ "^ (Www .)? Linuxidc.com "){
Set req. http. host = "www.linuxidc.com ";
Set req. backend = lb;
Return (pass); # Do not cache for test convenience.
} Elsif (req. http. host ~ "^ Bbs.linuxidc.com "){
Set req. backend = xp2;
} Else {
Error 404 "linuxidc cache ";
}
}
Test Results

### Varnish cdn push Platform
Http://code.google.com/p/varnish-php-bansys/
# Install php support
Unzip bansys.zip-d/var/www/html
Vim/var/www/html/bansys/config. php # Only keep the following settings, and comment out the remaining settings. $ Var_group1 = array (
'Host' => array ('2017. 25.254.2 '),
'Port' => '123 ',
);
// Varnish group definition
// Bind the host list
$ VAR_CLUSTER = array (
'Www .linuxidc.com '=> $ var_group1,
);
// Varnish version // 2.x and 3.x push commands are different
$ VAR_VERSION = "3 ";
?>
Bansys has two working modes: telnet and http.
In telnet mode, disable the varnish Service Management port verification and comment out "-S $" in the/etc/sysconfig/varnish file.
{VARNISH_SECRET_FILE} ", restart the varnish service.
For http mode, the following settings are required:
Vim/etc/varnish/default. vcl
Acl linuxidc {
# Set access control
"127.0.0.1 ";
"172.25.254.0"/24;
}
Sub vcl_recv {
If (req. request = "BAN "){
If (! Client. ip ~ Linuxidc ){
Error 405 "Not allowed .";
}
Ban ("req. url ~ "+ Req. url );
Error 200 "ban added ";
}
}
Then you can view it in the browser.

Concepts of Cache Server VarnishHttp://www.linuxidc.com/Linux/2014-05/101389.htm

Cache Server Varnish concept Article http://www.linuxidc.com/Linux/2014-05/101389.htm

Varnish Cache architecture note http://www.linuxidc.com/Linux/2013-10/91016.htm

Installation configuration http://www.linuxidc.com/Linux/2013-09/89916.htm for Varnish-5.8 Under CentOS 2.1.5

RedHat scripts use CentOS source updates to install Nginx, PHP 5.3, Varnish http://www.linuxidc.com/Linux/2012-07/65801.htm

Build Cache Server note http://www.linuxidc.com/Linux/2012-07/65234.htm using Varnish

The cache service Varnish installation configuration http://www.linuxidc.com/Linux/2012-07/65228.htm

Varnish compilation and installation preparation http://www.linuxidc.com/Linux/2012-07/65230.htm

Configuration Optimization http://www.linuxidc.com/Linux/2012-03/56435.htm for Varnish caching in Linux

Varnish: Click here
Varnish's: Click here

This article permanently updates the link address: Http://www.linuxidc.com/Linux/2016-03/129284.htm