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Bhupendra's avatar
Bhupendra
Icon for Altocumulus rankAltocumulus
Jun 20, 2023

irule

I want to put below condition on irule, please help 1. If source IP matches and URI is /A  and /B traffic should be forwarded to POOL A 2. If user is accessing /C-new, rewrite URI to /C and forward...
application delivery
irule
  • Mohamed_Ahmed_Kansoh's avatar
    Mohamed_Ahmed_Kansoh
    Jun 20, 2023

    Hi Bhupendra , 
    in Step 2 of rewrite >>> do you need the source ip matches as well or Not ? 

    So you need to match on specific source IP address/address first and then match /A or /B then move traffic to pool A but if the same match on source ip address/addresses but with uri starts with /c-new modify it to be /C and forward traffic to pool A 

    if non of those forward to pool B 

    that's Correct ? 

     

  • PeteWhite's avatar
    PeteWhite
    Jun 20, 2023

    Maybe think about using a local traffic policy rather than an iRule. It will be more efficient and easier for you to manage

  • Mohamed_Ahmed_Kansoh's avatar
    Mohamed_Ahmed_Kansoh
    Jun 20, 2023

    Hi Bhupendra , 
    As PeteWhite recommended , yes it's eaiser than iRule and will give you the same result. 

    it should be like this : 

    >>> Note that , the last condition "3rd match " should be All Traffic and then do those Actions ( Log and Forward to default pool ) 

    This is an overview about Local Traffic policy : 
    https://techdocs.f5.com/kb/en-us/products/big-ip_ltm/manuals/product/local-traffic-policies-getting-started-12-1-0/1.html

    Goodluck

Mohamed_Ahmed_Kansoh's avatar
Mohamed_Ahmed_Kansoh
Icon for MVP rankMVP
Jun 20, 2023

Hi Bhupendra , 
in Step 2 of rewrite >>> do you need the source ip matches as well or Not ? 

So you need to match on specific source IP address/address first and then match /A or /B then move traffic to pool A but if the same match on source ip address/addresses but with uri starts with /c-new modify it to be /C and forward traffic to pool A 

if non of those forward to pool B 

that's Correct ? 

 

  • Bhupendra's avatar
    Bhupendra
    Icon for Altocumulus rankAltocumulus
    Jun 20, 2023

    Hi Mohamed_Ahmed_Kansoh 

     

    in Step 2 of rewrite >>> do you need the source ip matches as well or Not ? ------- >>>>No we don't want to match source IP here only URI with any source.

    So you need to match on specific source IP address/address first and then match /A or /B then move traffic to pool A but if the same match on source ip address/addresses but with uri starts with /c-new modify it to be /C and forward traffic to pool A 

    if non of those forward to pool B
    that's Correct ? ----------------->>First condition match on specific source IP address/address first  then match URI /A or /B for selected source IPs then move traffic to pool A

    Second condition -any source with uri starts with /c-new modify it to be /C and forward traffic to pool A

    If no condition match from 1&2 then default traffic should be route POOL B

    • Mohamed_Ahmed_Kansoh's avatar
      Mohamed_Ahmed_Kansoh
      Icon for MVP rankMVP
      Jun 20, 2023

      Hi Bhupendra , 
      As PeteWhite recommended , yes it's eaiser than iRule and will give you the same result. 

      it should be like this : 

      >>> Note that , the last condition "3rd match " should be All Traffic and then do those Actions ( Log and Forward to default pool ) 

      This is an overview about Local Traffic policy : 
      https://techdocs.f5.com/kb/en-us/products/big-ip_ltm/manuals/product/local-traffic-policies-getting-started-12-1-0/1.html

      Goodluck

    • Mohamed_Ahmed_Kansoh's avatar
      Mohamed_Ahmed_Kansoh
      Icon for MVP rankMVP
      Jun 20, 2023

      Hi Bhupendra , 

      Use this irule : 

      when HTTP_REQUEST {
    if { ( [IP::addr [IP::client_addr] equals x.x.x.x ] ) and ( ([HTTP::uri] starts_with "/A") or ([HTTP::uri] starts_with "/B" ) ) }{
        
        log local0. " First Condition matched >>>> GO TO POOL A 🙂 "
        pool POOL_A
        
    } elseif { ( [HTTP::uri] starts_with "/C-new" ) }{
    
     HTTP::uri [string map -nocase {"/C-new " "/C"} [HTTP::uri]]
    
       log local0. " 2nd Condition matched (String MAP did it work ) >>>> GO TO POOL A 🙂 "
       pool POOL_A
       
    } else {
    log local0. " 3rd Condition matched ( Default path ) >>>> GO TO POOL B 🙂 "
    return
    }
}

      Don't forget to assign POOL_B as a default pool in Virtual server resources , to forward traffic in case the last condition ( Default ) triggered. 

      >> Also Make sure that there are no multiple requests are sent for each web page. 

      I mean : 
      if you sent req like this http://10.10.10.10/A by the specified source address it should be forwarded correct to pool_A. 
      But what if at the same time your web page needs multiple requests like http://10.10.10.10/image.php

      so make sure you send only single request per page. 

      Goodluck

    • Mohamed_Ahmed_Kansoh's avatar
      Mohamed_Ahmed_Kansoh
      Icon for MVP rankMVP
      Jun 21, 2023

      Hi Bhupendra , 

      Have you tested the irule as well ? 

      just test it , you may take it as a reference in further implementations.

      Also it will add to me that my code was correct or need further modifications.