Forum Discussion

impala_38421's avatar
impala_38421
Icon for Nimbostratus rankNimbostratus
Dec 29, 2017

Irule to use different persistence cookie by node

I need to create an irule that use different pools according the URL requested and insert a different persistence cookie to each pool member

I will try to explain the scenario.

The elements are:

One Virtual Server: VS1
Three Pools: Pool1, Pool2, Pool3
Two Nodes: Node1, Node2
6 persistence cookies: ck1, ck2, ck3, ck4, ck5, ck6

3 URLs that could be used by source user. VS1 has the IP of the URL, and the URL allways is the same only changes the resource

htttps://URL/XXXX    
htttps://URL/YYYY    
htttps://URL/ZZZZ

The work policy must be the next:

request to:

https://URL/XXXX
    Pool1
       Node1 with persistence ck1
       Node2 with Persistence ck2

https://URL/YYYY
    Pool2
       Node1 with persistence ck3
       Node2 with Persistence ck4

https://URL/ZZZZ
    Pool3
       Node1 with persistence ck5
       Node2 with Persistence ck6

To try to do it I have created the next Irule

when HTTP_REQUEST {   
    switch [HTTP::host] {
        https://URL/XXXX {
        Pool1
        }
        https://URL/YYYY {
            Pool2
        }
        https://URL/ZZZZ {
        Pool3
        }
        default { reject }
    }
}

Now I need to insert the cookie to each node. Please could you help finish this configurtion?

Thaks in advance.

Jordi

application delivery
iRules
  • nitass's avatar
    nitass
    Icon for Employee rankEmployee
    Dec 29, 2017

    Now I need to insert the cookie to each node. Please could you help finish this configurtion?

    doesn't default cookie persistence work since pool name is included in cookie name?

    K6917: Overview of BIG-IP persistence cookie encoding

    https://support.f5.com/csp/article/K6917

    by the way, i think the switch should look like this.

    switch -glob [HTTP::host][HTTP::uri] {
    "URL/XXXX*" {
        pool Pool1
    }
    ...
    • impala_38421's avatar
      impala_38421
      Icon for Nimbostratus rankNimbostratus
      Feb 01, 2018

      Hi nitass,

      Thanks for your answer and sorry for my delay.

      I want review you suggestion and trying to configure the irule as follow 

      switch -glob [HTTP::host][HTTP::uri] {
    "https://xxx.xxx.com/xxxxx" {
        pool Pool1
    }
    "https://xxx.xxx.com/yyyyy" {
        pool Pool2
    }
    "https://xxx.xxx.com/zzzzz" {
        pool Pool3
    }
}

      Now the original request has changed and I need insert http cookie for each pool.

      This is an example:

      switch -glob [HTTP::host][HTTP::uri] {
    "https://xxx.xxx.com/xxxxx" {
        pool Pool1
        persist cookie insert <>
    }
    "https://xxx.xxx.com/yyyyy" {
        pool Pool2
        persist cookie insert <>
    }
    "https://xxx.xxx.com/zzzzz" {
        pool Pool3
        persist cookie insert <>
    }
}

      Do you think that is this the correct configuration?

      Many Thanks,

      Jordi

  • nitass_89166's avatar
    nitass_89166
    Icon for Noctilucent rankNoctilucent
    Dec 29, 2017

    Now I need to insert the cookie to each node. Please could you help finish this configurtion?

    doesn't default cookie persistence work since pool name is included in cookie name?

    K6917: Overview of BIG-IP persistence cookie encoding

    https://support.f5.com/csp/article/K6917

    by the way, i think the switch should look like this.

    switch -glob [HTTP::host][HTTP::uri] {
    "URL/XXXX*" {
        pool Pool1
    }
    ...
    • impala_38421's avatar
      impala_38421
      Icon for Nimbostratus rankNimbostratus
      Feb 01, 2018

      Hi nitass,

      Thanks for your answer and sorry for my delay.

      I want review you suggestion and trying to configure the irule as follow 

      switch -glob [HTTP::host][HTTP::uri] {
    "https://xxx.xxx.com/xxxxx" {
        pool Pool1
    }
    "https://xxx.xxx.com/yyyyy" {
        pool Pool2
    }
    "https://xxx.xxx.com/zzzzz" {
        pool Pool3
    }
}

      Now the original request has changed and I need insert http cookie for each pool.

      This is an example:

      switch -glob [HTTP::host][HTTP::uri] {
    "https://xxx.xxx.com/xxxxx" {
        pool Pool1
        persist cookie insert <>
    }
    "https://xxx.xxx.com/yyyyy" {
        pool Pool2
        persist cookie insert <>
    }
    "https://xxx.xxx.com/zzzzz" {
        pool Pool3
        persist cookie insert <>
    }
}

      Do you think that is this the correct configuration?

      Many Thanks,

      Jordi