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richarc's avatar
richarc
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May 18, 2023
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Unique Identifier for irules Http response

With code for an irule below is there a way I can set a unique identifier for the data coming back. I ask because when the logs are ingested into Splunk we would like to know which header came with w...
  • Paulius's avatar
    Paulius
    May 19, 2023

    richarc With the iRule logging each time you receive an HTTP response this will be a significant amount of log entries. You might be better off with one logging line and having the server insert a unique ID per client rather than the F5. If you are using UIE persistence you might be able to do the following and use Splunk to merge the request and response somehow.

    when HTTP_REQUEST priority 500 {
    
       set value [persist lookup uie [list $myVar any virtual]]
    
       log local0. "HTTP reqeust client ID: ${value}"
    
    }
    
    when HTTP_RESPONSE priority 500 {
    
       set value [persist lookup uie [list $myVar any virtual]]
    
       log local0. "HTTP resposne client ID: ${value}"
    
    }