Forum Discussion

Jangle-Man_1290's avatar
Jangle-Man_1290
Icon for Nimbostratus rankNimbostratus
Sep 19, 2014

iRule - Direct traffic to specific pools based on host and URI

Good Afternoon,

I am struggling to find a winning combination for the following process.

The default Virtual Server pool is different and required for all other sites.

Step 1 - The website www.communigator.co.uk to use Pool_Website

Step 2 - Any website with the /LZ/ in the URi to us Pool_Landing_64

Step 3 - The web site www.communigator.co.uk with URI /login to use Pool_Admnin_64

I can get the site to hit the pool in step 1 but I get mixed response from when I try and add step 2 and 3.

Here is the syntax so far.

when HTTP_REQUEST { if {[HTTP::uri] starts_with "/login"} { pool Pool_Admin_64 } 

            if {[HTTP::uri] starts_with "/lz/*"} {
            pool Pool_Landing_64 }       

            if { [HTTP::host] eq "www.communigator.co.uk"} { 
            pool Pool_Website }

}

Regards, Stuart

APM
application delivery
devops
iControl
iRules
performance
security
TMOS

10 Replies

Sort By
  • El_Jefe's avatar
    El_Jefe
    Icon for Nimbostratus rankNimbostratus
    Sep 19, 2014

    when HTTP_REQUEST { if { [HTTP::path] starts_with "/lz/" }{ pool Pool_Landing_64 } elseif { [HTTP::path] starts_with "/login/" }{ pool Pool_Admin_64 } else { pool Pool_Website } }

     

    • shaggy's avatar
      shaggy
      Icon for Nimbostratus rankNimbostratus
      Sep 19, 2014
      throw some tolower's in there, too: ... if { [string tolower [HTTP::path]] starts_with "/lz/" }{ pool Pool_Landing_64 } elseif {[string tolower [HTTP::path]] starts_with "/login/" }{ pool Pool_Admin_64 ...
    • El_Jefe's avatar
      El_Jefe
      Icon for Nimbostratus rankNimbostratus
      Sep 19, 2014
      windowdressing. screen doors on submarines.
  • El_Jefe_43496's avatar
    El_Jefe_43496
    Icon for Nimbostratus rankNimbostratus
    Sep 19, 2014

    when HTTP_REQUEST { if { [HTTP::path] starts_with "/lz/" }{ pool Pool_Landing_64 } elseif { [HTTP::path] starts_with "/login/" }{ pool Pool_Admin_64 } else { pool Pool_Website } }

     

    • shaggy's avatar
      shaggy
      Icon for Nimbostratus rankNimbostratus
      Sep 19, 2014
      throw some tolower's in there, too: ... if { [string tolower [HTTP::path]] starts_with "/lz/" }{ pool Pool_Landing_64 } elseif {[string tolower [HTTP::path]] starts_with "/login/" }{ pool Pool_Admin_64 ...
  • Brent_West_7733's avatar
    Brent_West_7733
    Historic F5 Account
    Sep 19, 2014

    Maybe something like this would help?

    when HTTP_REQUEST { 
set debug 1
set client_info "[IP::client_addr]:[TCP::remote_port]: [HTTP::host][HTTP::uri]"

if { $debug } {
    log local0.  "$client_info requests [HTTP::host] and [HTTP::uri]"
}
if { [string tolower [HTTP::uri]] starts_with "/login" } {
    if { $debug } { log local0.  "$client_info - line 9 selected - pool is Pool_Admin_64" }
    pool Pool_Admin_64 
}
elseif { [string tolower [HTTP::uri]] starts_with "/lz/"  } {
    if { $debug } { log local0.  "$client_info - line 14 selected - pool is Pool_Landing_64" }
    pool Pool_Landing_64 
}
elseif { [getfield [string tolower [HTTP::host]] ":" 1] eq "www.communigator.co.uk"} {
    if { $debug } { log local0.  "$client_info - line 19 selected - pool is Pool_Website" }
    pool Pool_Website 
}
else {
    if { $debug } { log local0.  "$client_info - line 24 selected - No Match, using default" }
}}
    • Brent_West_7733's avatar
      Brent_West_7733
      Historic F5 Account
      Sep 19, 2014
      The [HTTP::host] can look like www.example.com:80 which is why we need the getfield, and we would like our test to be case insensitive, hence the string tolower. The [HTTP::uri] should be case insensitive, and I removed your wildcard, because string matches don't work that way. starts_with is sufficient. I added 'elseif' because you usually want the iRule to stop processing conditionals after a pool selection is made, but in cases where there are multiple possible matches (a host and a uri) plan your logic accordingly. The last 'pool' statement wins. After you get your iRule situated, remove the debugging statements unless you want them
  • Jangle-Man_1290's avatar
    Jangle-Man_1290
    Icon for Nimbostratus rankNimbostratus
    Sep 22, 2014

    Good Morning Brent West,

     

    Thank you for your prompt reply and comments I will review and come back to you shortly.

     

    Regards, Stuart

     

  • Jangle-Man_1290's avatar
    Jangle-Man_1290
    Icon for Nimbostratus rankNimbostratus
    Sep 22, 2014

    Thank you Brent, it has provided 99% of my requirement however when it turns out I need to change "/lz/" so I can wildcard anything before for example "*lz/" but that seems to fail any ideas?

     

    Regards, Stuart