Forum Discussion

AndreyS_294380's avatar
AndreyS_294380
Icon for Nimbostratus rankNimbostratus
Jan 23, 2017

iRule pool selection based on [HTTP::host]

Hello,

I'm trying to distribute traffic that comes to VS among some pools based on ]HTTP::host]. Here is the iRule but unfortunately it doesn't work:

when HTTP_REQUEST {

set hostname [string tolower [HTTP::host]] if { $hostname contains "site1.com" } { pool pool1 } elseif { $hostname contains "site2.com" } { pool pool2 } elseif { $hostname contains "site3.com" } { pool pool3 } }

VIP resets the connection:

Recv failure: Connection reset by peer

Wireshark says that RST has been sent due to "no server selected"

Looking for your help.

application delivery
devops
iRules
  • KeesvandenBos's avatar
    KeesvandenBos
    Icon for MVP rankMVP
    Jan 23, 2017

    Hi Andrey,

    Could you include logging in your irule to see if there is a match?

    when HTTP_REQUEST {
set hostname [string tolower [HTTP::host]]
    if { $hostname contains "site1.com" } { 
        pool pool1
        log local0. "pool1 selected"
    } elseif { $hostname contains "site2.com" } { 
        pool pool2 
        log local0. "pool2 selected"
    } elseif { $hostname contains "site3.com" } { 
        pool pool3 
        log local0. "pool3 selected"
    } 
}

    Cheers,

    Kees

  • Stanislas_Piro2's avatar
    Stanislas_Piro2
    Icon for Cumulonimbus rankCumulonimbus
    Jan 23, 2017

    Hi,

    you can use local traffic policies instead of irule to do that.

    if you want to use irule, use this one:

    when HTTP_REQUEST {
switch -- [string tolower [HTTP::host]] {
    "site1.com" { 
        pool pool1
    "site2.com" { 
        pool pool2 
    "site3.com" { 
        pool pool3 
    } 
    log local0. "The selected pool is : [LB::server pool]"
}