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Sirisha_126707's avatar
Sirisha_126707
Icon for Nimbostratus rankNimbostratus
Feb 07, 2017

Redirection

I am new to the iRules , We need to create an irule that forwards requests coming into

 

https://abc.co.uk to go to https://www.xyz.co.uk

 

initially we only need 1 in 10 requests to be forwarded then we will need to increase this number when business requires it until all requests get forwarded to the new address.

 

application delivery
iRules

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  • Kai_Wilke's avatar
    Kai_Wilke
    Icon for MVP rankMVP
    Feb 07, 2017

    Hi Sirisha,

    you may use the iRule below as a starting point... 

    when RULE_INIT {
    set static::load_value 10   ; Load Value in % percent (0-100 is valid)
}
when HTTP_REQUEST {
    if { ( [string tolower [HTTP::host]] eq "abc.co.uk" ) 
     and ( [expr { int(rand()*100) }] < $static::load_value } then {
        HTTP::redirect "https://www.xyz.co.uk"
    }   
}

    Note: The 

    [expr { int(rand()*100) }]
    syntax generates a random number in the range of 
    0-99
    . If the generated number (e.g. 
    0-9
    ) is lower than the value of 
    $static::load_value
    (e.g. 
    10
    ), the request will become redirected to the new URL (e.g. https://www.xyz.co.uk). If the the generated number (e.g. 
    10-99
    ) is higher than or equals the value of 
    $static::load_value
    (e.g. 
    10
    ), the iRule will do nothing and let the request silently pass...

    Cheers, Kai