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Matt_108113's avatar
Matt_108113
Icon for Nimbostratus rankNimbostratus
Jul 15, 2009

Using Irules to mimic apache Virtual hosts

I would like to use I rules to mimic Apache Virtual Hosts.

 

 

I have a web server that has a bunch of sites on it and instead of setting up virtual hosts on Apache I wanted to see if I could do this with Irules.

 

 

Basically when someone hits the site and requests http://webserver1.domain.com/SITE1 they would be redirected to.

 

 

http://SITE1.domain.com in the browser.

 

 

there are multiple sites and they are added all the time so if I could get something generic like.

 

 

when HTTP_REQUEST {

 

if { [HTTP::uri] contains "/SITE1" }{

 

HTTP::redirect http://site1.domain.com}

 

}

 

 

Is kind of the idea, but how to I make the F5 aware that site1 is on the webserver at http://webserver1.domain.com/SITE1?

 

 

The problem is I don't know syntactically what needs to be were to do this.

 

 

Any help would be appreciated.
application delivery
dev
devops
iRules

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  • JRahm's avatar
    JRahm
    Icon for Admin rankAdmin
    Jul 17, 2009
    @bcallahan, yes you could do something like this:

    [getfield [domain [HTTP::host] 2] 1]

    or

    [lindex [split [HTTP::host] .] end-1]

    Either of these would take string a string value from HTTP::host of www.site1.com and return only site1

    So the rule could be consolidated to: 

     
 when HTTP_REQUEST { 
   HTTP::header replace Host "www.apacheserver.com" 
   HTTP::uri "/[getfield [domain [HTTP::host] 2] 1][HTTP::uri] 
 }

    With this approach, you might build a class of acceptable websites to compare against to keep noise from hitting your servers. Same principle as Hoolio suggested with the default case in the switch.

    HTH...Jason