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Blue_whale's avatar
Blue_whale
Icon for Cirrocumulus rankCirrocumulus
Apr 11, 2022

Need help to understand the irule

Hi experts ,  I need help to understand the below irule ,  Why we have 2 condition for the same url , 1 to replace the host and then to redirect to the pool ? VIP url ; https://csk-net-corp.aci.ne...
application delivery
irule
Samir's avatar
Samir
Icon for MVP rankMVP

To update the Host header value without redirecting the client to the new Host value, you can use HTTP::header replace Host “csk-net-bw.aci.network”. This update will only affect the request to the pool member. The client will not see the update unless the web application uses the requested host header value to generate response headers and/or content.

 

if {([string tolower [HTTP::host]] equals "csk-net-corp.aci.network")}{
HTTP::header replace Host "csk-net-bw.aci.network"
}

 

 In 2nd request, traffic are served by different group of pool member if condition matches. URL will be remain same csk-net-corp.aci.network

 

if { [HTTP::path] starts_with "/test/network" } { pool P_CSK_NET_5001
}

 

 

Blue_whale's avatar
Blue_whale
Icon for Cirrocumulus rankCirrocumulus
Apr 12, 2022

Hi Samir  , thanks for your reply .. 

I have few doubts ,

1) In my case both the condition or request are there in the same irule.So it will replace the host header and also it will send the request to the specified pool - P-CSK_NET_5001 right ?

2)In which scenrio we would require to change the host haeder , whar are we going to achive with that ?