Forum Discussion

oogabooga_13071's avatar
oogabooga_13071
Icon for Altocumulus rankAltocumulus
Oct 12, 2016

LTM Policy Logging variables pre 12.0

Hi Guys,   Does anyone know if it is possible to log dynamic variables (e.g. [HTTP::uri]) within a LTM policy code pre 12.x (on v11.6.1)? I read the following from here   Version 11.X: Request ...
  • oogabooga_13071's avatar
    Oct 13, 2016

    Hi Guys,

    It turns out dynamic variables are only available on v12.x and it is not possible on v11.x

    Here is the excerpt form F5... The feature you are trying to use is called "TCL command substitution" and is supported only in v12.x

       Manual Chapter: Local Traffic Policies
       https://support.f5.com/kb/en-us/products/big-ip_ltm/manuals/product/ltm-basics-12-0-0/7.html
    
    In versions prior to v12.x you cannot use TCL variables in the log messages (only static text) - iRules have to be used to log TCL variables in this case.
    
    In v12.x you can use the syntax below to log TCL variables such as "HTTP::uri":
    
     ltm policy /Common/Drafts/lab-test-policy-v1.1 {
        last-modified 2016-10-12:13:12:16
        published-copy /Common/lab-test-policy-v1.1
        requires { http }
        rules {
            log {
                actions {
                    0 {
                        log
                        write
                        message "tcl: This is the current URI: [HTTP::uri]"
                    }
                }
            }
        }
        strategy /Common/first-match
     }