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2 IRules with "when HTTP_REQUEST"

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kgaigl
Cirrocumulus
Cirrocumulus

‎23-Dec-2021 03:09 - last edited on ‎08-Feb-2022 14:17 by Community Manager

Hello,

I need on a VS 2 IRules, one for redirect to a URI and one for a Maintanance Page:

redirect:

 

 

when HTTP_REQUEST { 
 if { [HTTP::uri] equals "/"}
 {
    HTTP::redirect "https://[HTTP::host]/some-uri"
 }
}

 

Maintanance Page:

 

when HTTP_REQUEST {
        if { [active_members [LB::server pool]] < 1 } {
        switch [HTTP::uri] {
        "/bg-wappen.gif" {HTTP::respond 200 content [ifile get "bg-wappen.gif"]}
        default {HTTP::respond 200 content {


<!DOCTYPE html>
...

 

but if I assign both IRules, if the backend server is down, the redirect doesn't work.

I tried with priority 10 in one IRule and 20 in the other IRule

Have you some suggestions for a solution? Both requirements in one Rule?

I've tried:

 

when HTTP_REQUEST {
		 if { [HTTP::uri] equals "/"}
 {
    HTTP::redirect "https://[HTTP::host]/some-uri"
 }
        if { [active_members [LB::server pool]] < 1 } {
        switch [HTTP::uri] {


        "/bg-wappen.gif" {HTTP::respond 200 content [ifile get "bg-wappen.gif"]}


        default {HTTP::respond 200 content {


<!DOCTYPE html>
...

 

but didn't resolve

thank you

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Enes_Afsin_Al
MVP
MVP

‎23-Dec-2021 05:49 - last edited on ‎05-Jun-2023 23:01 by Fog

Hi kgaigl,

I think a tcl error occurs. Can you investigate the ltm logs?

cat /var/log/ltm | grep "TCL error"

https://support.f5.com/csp/article/K23237429

Redirect:

when HTTP_REQUEST {
	if { [HTTP::has_responded] } { return }
	if { [HTTP::uri] equals "/" } {
		HTTP::redirect "https://[HTTP::host]/some-uri"
		return
	}
}

Maintanance Page:

when HTTP_REQUEST priority 450 {
	if { [HTTP::has_responded] } { return }
	if { [active_members [LB::server pool]] < 1 } {
		switch [HTTP::uri] {
			"/bg-wappen.gif" { HTTP::respond 200 content [ifile get "bg-wappen.gif"] }
			default { HTTP::respond 200 content {
				<!DOCTYPE html>
				...

Combined:

when HTTP_REQUEST {
	if { [HTTP::has_responded] } { return }
	if { [HTTP::uri] equals "/" } {
		HTTP::redirect "https://[HTTP::host]/some-uri"
		return
	}
	elseif { [active_members [LB::server pool]] < 1 } {
		switch [HTTP::uri] {
			"/bg-wappen.gif" { HTTP::respond 200 content [ifile get "bg-wappen.gif"] }
			default { HTTP::respond 200 content {
				<!DOCTYPE html>
				...

View solution in original post

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4 REPLIES 4

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Enes_Afsin_Al
MVP
MVP

‎23-Dec-2021 05:49 - last edited on ‎05-Jun-2023 23:01 by Fog

Hi kgaigl,

I think a tcl error occurs. Can you investigate the ltm logs?

cat /var/log/ltm | grep "TCL error"

https://support.f5.com/csp/article/K23237429

Redirect:

when HTTP_REQUEST {
	if { [HTTP::has_responded] } { return }
	if { [HTTP::uri] equals "/" } {
		HTTP::redirect "https://[HTTP::host]/some-uri"
		return
	}
}

Maintanance Page:

when HTTP_REQUEST priority 450 {
	if { [HTTP::has_responded] } { return }
	if { [active_members [LB::server pool]] < 1 } {
		switch [HTTP::uri] {
			"/bg-wappen.gif" { HTTP::respond 200 content [ifile get "bg-wappen.gif"] }
			default { HTTP::respond 200 content {
				<!DOCTYPE html>
				...

Combined:

when HTTP_REQUEST {
	if { [HTTP::has_responded] } { return }
	if { [HTTP::uri] equals "/" } {
		HTTP::redirect "https://[HTTP::host]/some-uri"
		return
	}
	elseif { [active_members [LB::server pool]] < 1 } {
		switch [HTTP::uri] {
			"/bg-wappen.gif" { HTTP::respond 200 content [ifile get "bg-wappen.gif"] }
			default { HTTP::respond 200 content {
				<!DOCTYPE html>
				...
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kgaigl
Cirrocumulus
Cirrocumulus

‎26-Dec-2021 23:25

Hi Enes,

 

the combined Rule is working fine.

 

Thank you

 

Karl

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Enes_Afsin_Al
MVP
MVP
In response to mickbiden2

‎27-Dec-2021 07:51

Hi,

Can you share the iRules?

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Yesh1923
Nimbostratus
Nimbostratus
In response to Enes_Afsin_Al

‎08-Mar-2023 03:25

what is reason behind i cannot use 2 separate http request irule in version 16 , 2 http request irule i used in version 13 

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