Response time iRule error

This looks promising. Never setup and request logging profile. Is there a step by step doc somewhere?

Hello,

In the F5 GUI, there are field names listed in the help tab on the left.

I find it easier to search for request logging on the internet. F5 documentation on request logging, though I am not sure about a step-by-step doc.

It is really not complicated, but I have found the GUI configuration is buggy, at least in the version I was using. If you configure a Request Logging profile in the GUI, then list it in the CLI, you will know if there is a problem. If configured in the GUI, the F5 will save line breaks in the config if the fields listed do not fit on a single line. To work around this, I copy the config, remove the line breaks and merge the profile back into the CLI.

OK, I found how to setup the Request Logging but it doesn't seem to be working for me. I know I'm not doing something right just haven't figured it out yet.

I do have the iRule working but now I'm trying to figure out how I can get it to only log for the URL that I want and not every URL that comes through the VS. do you have an idea how I can accomplish this?

This is the iRule I am using:

when HTTP_REQUEST {
    set CLIENT_ADDR [IP::client_addr]
    set XFF [HTTP::header X-Forwarded-For]
    set ID "[TCP::local_port][expr { int(100000000 * rand()) }]"
    set REQUEST_RECEIVE [clock clicks -milliseconds]
    set HST "[HTTP::host]"
    set URI "[HTTP::uri]"
}


when HTTP_REQUEST_SEND {
    set REQUEST_SEND [clock clicks -milliseconds]
    set REQUEST_WAIT [expr {$REQUEST_SEND - $REQUEST_RECEIVE}]
    log local0. "SRC:$CLIENT_ADDR  XFF:$XFF ID:$ID HST:$HST'/'$URI"
}

when HTTP_RESPONSE {
    set RESPONSE_TIME [expr {[clock clicks -milliseconds] - $REQUEST_SEND}]
    log local0. "SRC:$CLIENT_ADDR XFF:$XFF ID:$ID HST:$HST$URI - HTTP[HTTP::status] $RESPONSE_TIME\ms/$REQUEST_WAIT\ms [LB::server addr]"
}

I want to somehow tell this to log only if the URL is ex. website1.com log if it is website2.com ignore as they will both come into the same VS on the F5.

Jeremy,

I also tried your code above but I get an error when trying to save it:

Exception caught in LocalLB::urn:iControl:LocalLB/Rule::create()
Exception: Common::OperationFailed
    primary_error_code   : 17236305 (0x01070151)
    secondary_error_code : 0
    error_string         : 01070151:3: Rule [/Common/Responce-times3] error: /Common/Responce-times3:2: error: [undefined procedure: ltm][ltm profile statistics DELAY_STAT {
    field1 total
    field2 webtest_total
    field3 webtest_slow
    field4 webtest_fast
}]

Hello,

What I gave was not the rule by itself, but a configuration that can be merged. I provided it that way because the iRule is tracking statistics which requires a separate stats profile that must also be applied to the virtual server.

Also, the iRule I wrote has a check in HTTP_REQUEST_SEND to only track time requests.

Jeremy,

Thank you for the reply. Sorry but I'm not a programmer. I learn a lot by doing and seeing how someone else has done what I'm trying to do. The error above looks like the LTM doesn't understand the procedure:

error: [undefined procedure: ltm][ltm profile statistics DELAY_STAT {

How can I get this to work or best bet would be to get my iRule above to work so that it only logs the URL that I want and not everything.

Thanks.

Correct, ltm is not a procedure. You are receiving the error because you are attempting to paste what I provided into the F5 web interface as an iRule. It is not an iRule.

This is configuration for a profile:

ltm profile statistics DELAY_STAT {
    field1 total
    field2 webtest_total
    field3 webtest_slow
    field4 webtest_fast
}

What I provided is not iRule code, it's a snippet of configuration in tmsh format which includes both a statistics profile and an iRule.

What you are attempting to paste into the F5 is not an iRule, it is a snippet of configuration.

Here is the iRule configuration, not the iRule code:

ltm rule LOG-Delay {
    when RULE_INIT {
     what is a slow response in milliseconds
    set static::slow_response 2000
}
when HTTP_REQUEST_SEND {
    STATS::incr DELAY_STAT total
    clientside {
        if {[string tolower [HTTP::host]] contains "onpoint342labupgrade2013"} {
            STATS::incr DELAY_STAT webtest_total
            set URL [string tolower [HTTP::host]][HTTP::uri]
            set SENT [clock clicks -milliseconds]
        }
    }
}
when HTTP_RESPONE {
     exit event if variable is not set
    if {![info exists SENT]} { return }

    set TIME [expr {[clock clicks -milliseconds] - $SENT}]
    if {$TIME >= $static::slow_response} {
        STATS::incr DELAY_STAT webtest_slow
        log local0. "[HTTP::status]: Client [IP::client_addr]; \
        Server [IP::server_addr]:[TCP::server_port]; URL ${URL}; Time ${TIME}ms"
    } else {
        STATS::incr DELAY_STAT webtest_fast
    }
    unset SENT URL TIME
}
}

If you want to use exactly what I provided, you would need to log into the CLI and run the command load sys config merge from-terminal. If you are not familiar with this process and its implications, I strongly recommend taking the time to understand how it works.

If you want to just paste in the iRule and do not care about the stats, here is just the iRule code without the STATS::incr command.

when RULE_INIT {
     what is a slow response in milliseconds
    set static::slow_response 2000
}
when HTTP_REQUEST_SEND {
    clientside {
        if {[string tolower [HTTP::host]] contains "onpoint342labupgrade2013"} {
            set URL [string tolower [HTTP::host]][HTTP::uri]
            set SENT [clock clicks -milliseconds]
        }
    }
}
when HTTP_RESPONE {
     exit event if variable is not set
    if {![info exists SENT]} { return }

    set TIME [expr {[clock clicks -milliseconds] - $SENT}]
    if {$TIME >= $static::slow_response} {
        log local0. "[HTTP::status]: Client [IP::client_addr]; \
        Server [IP::server_addr]:[TCP::server_port]; URL ${URL}; Time ${TIME}ms"
    }
    unset SENT URL TIME
}

Is that what you are looking for?