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Goran_Blomquis1's avatar
Goran_Blomquis1
Icon for Nimbostratus rankNimbostratus
Dec 22, 2017

No output from persist lookup $header1

Hi all,

 

We have a case there we need to investigate and take decision based on persistence record.

 

I do a set ins_id to read header that also is used in persistent table. Persistent work and I have value in table when look in persistence table via TMSH. So it's OK. Problem is that I can´t get any value in log from "persist lookup uie" part.

 

set inst_id [HTTP::header value "installationId"] set pvaleu [persist lookup uie $inst_id] if {$host_debug}{log local0. "$log_prefix: installationId = $inst_id and pvaleu = $pvaleu"}

 

When I look in log it´s looks like this:

 

Dec 22 12:26:26 lbt_bgc_a1 info tmm1[28894]: Rule /Common/i-rule_d171222 : client IP:port=213.115.83.54:29873; VIP=/Common/: installationId = 48548FBCB1BB4D1780C3E7D18C3FD9C5 and pvaleu =

 

 

So I do not get any output from "set pvaleu [persist lookup uie $inst_id]" in LTM log.

 

Best Regards and Have a Great Christmas

 

//Goran

 

application delivery
iRules
LTM
  • Leonardo_Souza's avatar
    Leonardo_Souza
    Icon for Cirrocumulus rankCirrocumulus
    Dec 22, 2017

    https://devcentral.f5.com/wiki/irules.persist.ashx

     

    "persist lookup [all|node|port|pool] "all" or no specification returns a list containing the node, port and pool name. Specifying any of the other return types will return the specified item only. = | { [any virtual|service|pool] [pool ] } the latter key specification is used to access persistence entries across virtuals, services, or pools."

     

     

    Try to add the virtual server or pool in the lookup command. The link has multiple examples.

     

  • nitass's avatar
    nitass
    Icon for Employee rankEmployee
    Dec 22, 2017

    this is mine. big-ip is running 12.1.2.

    // config

root@(bip1a)(cfg-sync In Sync)(Active)(/Common)(tmos) list ltm virtual baz
ltm virtual baz {
    destination 10.200.155.165:80
    ip-protocol tcp
    mask 255.255.255.255
    pool foo
    profiles {
        http { }
        tcp { }
    }
    rules {
        qux
    }
    source 0.0.0.0/0
    source-address-translation {
        type automap
    }
    translate-address enabled
    translate-port enabled
    vs-index 3
}
root@(bip1a)(cfg-sync In Sync)(Active)(/Common)(tmos) list ltm rule qux
ltm rule qux {
    when HTTP_REQUEST {
  log local0. "\[HTTP::cookie SESSION\]=[HTTP::cookie SESSION]"
  if { [HTTP::cookie SESSION] ne "" } {
    log local0. "persist lookup uie [HTTP::cookie SESSION]=[persist lookup uie [HTTP::cookie SESSION]]"
    persist uie [HTTP::cookie SESSION]
  }
}
when HTTP_RESPONSE {
  log local0. "\[HTTP::cookie SESSION\]=[HTTP::cookie SESSION]"
  if { [HTTP::cookie SESSION] ne "" } {
    persist add uie [HTTP::cookie SESSION]
  }
}
}

// client

 curl -I http://10.200.155.165
HTTP/1.1 200 OK
Date: Fri, 22 Dec 2017 20:48:25 GMT
Server: Apache/1.3.26 (Unix) PHP/4.1.2 mod_ssl/2.8.10 OpenSSL/0.9.6b
X-Powered-By: PHP/4.1.2
Set-Cookie: SESSION=a83ccc31492529e8cd457417befb5e59; path=/
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Pragma: no-cache
Content-Type: text/html

 curl -I http://10.200.155.165 -H "cookie: SESSION=a83ccc31492529e8cd457417befb5e59"
HTTP/1.1 200 OK
Date: Fri, 22 Dec 2017 20:48:41 GMT
Server: Apache/1.3.26 (Unix) PHP/4.1.2 mod_ssl/2.8.10 OpenSSL/0.9.6b
X-Powered-By: PHP/4.1.2
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Pragma: no-cache
Content-Type: text/html

// big-ip

[root@bip1a:Active:In Sync] config  tail -f /var/log/ltm
Dec 22 21:32:01 bip1a info tmm[12155]: Rule /Common/qux : [HTTP::cookie SESSION]=
Dec 22 21:32:01 bip1a info tmm[12155]: Rule /Common/qux : [HTTP::cookie SESSION]=a83ccc31492529e8cd457417befb5e59

Dec 22 21:32:17 bip1a info tmm[12155]: Rule /Common/qux : [HTTP::cookie SESSION]=a83ccc31492529e8cd457417befb5e59
Dec 22 21:32:17 bip1a info tmm[12155]: Rule /Common/qux : persist lookup uie a83ccc31492529e8cd457417befb5e59=/Common/foo 10.200.155.166 80
Dec 22 21:32:17 bip1a info tmm[12155]: Rule /Common/qux : [HTTP::cookie SESSION]=
  • Goran_Blomquis1's avatar
    Goran_Blomquis1
    Icon for Nimbostratus rankNimbostratus
    Jan 25, 2018

    Thanx for replay both of you.

    There was some Christmas and a new year, some other assignments between, so that´s why my feedback have been delayed. I did some redesign so I did not have to use "lookup" command, did not get it to work in the event I needed it. Insted I used a Universal Persistense profile on both virtual servers. Persist profile use "Match Across Virtual Servers" and desired timeout.

    Used persist add to add persistence in response header on first vip and then used persist on URI to use same backend with the same value used in response header in other VIP.

    I-rule looks somthing like.

    when HTTP_REQUEST {
set persist_uri [string tolower [HTTP::uri]]
switch -glob $persist_uri {

    "*/example1/content/*" {

        set reference_example1 [findstr [HTTP::uri] "/example1/content/" 18 32]
        persist uie $reference_example1
        log local0. "$Persist on $reference_example1"           
    }

    "*/example2/content/*" {

        set reference_example2 [findstr [HTTP::uri] "/example2/content/" 18 32]
        persist uie $reference_example2
        log local0. "Persist on $reference_example2"            
    }   

}
when HTTP_RESPONSE {

    if { [HTTP::header exists "Referense_Header"] } {

        set reference_token [HTTP::header value "Referense_Header"] 
        persist add uie $reference_token
        log local0. "Persist record in PaymentRequestToken Header , payment reference = $payment_token"}            
    }   

}

    (Pool selection and all other logic is done in I-rule attached to VIP).

    Works perfect in my case!

    Regards

    //Goran