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pjcampbell_7243's avatar
pjcampbell_7243
Icon for Cirrus rankCirrus
Feb 19, 2016

Help tracking down multiple redirect errors...

I am looking for assistance tracking down Multiple redirect errors in /var/log/ltm.

 

The problem is that I have many combinations of iRules applied to hundreds of virtual servers. The err logging only lists that it's a multiple redirect, but doesn't help me figure out which virtual is causing it. Is there a way I can figure out what the virtual server was that was in use when this was triggered... or some other way that will give me a clue on where I need to look to resolve this?

 

If I know which Virtual is causing it, I can go look at the other iRules on that virtual and fix it!!!

 

application delivery
iRules

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  • Kai_Wilke's avatar
    Kai_Wilke
    Icon for MVP rankMVP
    Feb 20, 2016

    Hi Pjcampbell,

    you can't see the Virtual Server name for those unhandled exeptions. But you could implement custom error handles accross the board, to get additional information which 

    [virtual]
    and 
    [HTTP::host][HTTP::uri]
    was accessed.

    Change every instance of...

    HTTP::redirect "http:://www.site.de/"

    ... to ...

    if { [catch { HTTP::redirect "http:://www.site.de/" }]} then { log local0.debug "Multiple Redirect Detected on [virtual] for [HTTP::host][HTTP::uri]" }

    ... by using an iRule-Editor export and a Text-Editor of your choice which supports RegEx and Multi-File replacements and then use those Search/Replace patterns...

    Search: HTTP::redirect(.*)\n
Replace: if { [catch { HTTP::redirect$1 }]} then { log local0.debug "Multiple Redirect Detected on [virtual] for [HTTP::host][HTTP::uri]" }\n

Search: HTTP::respond(.*)\n
Replace: if { [catch { HTTP::respond$1 }]} then { log local0.debug "Multiple Responses Detected on [virtual] for [HTTP::host][HTTP::uri]" }\n

    After replacement you should verify that the iRule are looking still good and then import the iRules back using the iRule-Editor.

    Cheers, Kai