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Nacho_de_Aguina's avatar
Nacho_de_Aguina
Icon for Nimbostratus rankNimbostratus
Nov 08, 2005

Redirector Problem

Hello everybody:

 

 

I´m trying to forward http requests to one or other Web server depending on the http header.

 

 

Example.

 

http://VirtualServer/magallanes --> Should go to Magallanes HOst

 

http://VirtualServer/hansolo --> Should go to Hansolo host

 

 

SO i have created a VS (stardard mode) with SNAT automode. and two pools one with each server.

 

 

I have added this IRule

 

 

when HTTP_REQUEST {

 

if { [HTTP::uri] starts_with "/magallanes" } {

 

pool pool_magallanes

 

}

 

elseif { [HTTP::uri] starts_with "/hansolo" } {

 

pool pool_hansolo

 

}

 

}

 

 

But it doesn´t works, i get a message in my browser that the page cannot be displayed

 

 

Thanks in advance

 

Nacho
application delivery
dev
devops
iRules

10 Replies

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  • JRahm's avatar
    JRahm
    Icon for Admin rankAdmin
    Nov 08, 2005
    Try adding some logging:

    
log "Host is [HTTP::host], URI is [HTTP::uri]"
when HTTP_REQUEST {
   if { [HTTP::uri] starts_with "/magallanes" } {
   log "IF successful on URI [HTTP::uri]"
   pool pool_magallanes
   } elseif { [HTTP::uri] starts_with "/hansolo" } {
      log "ELSEIF successful on URI [HTTP::uri]"
      pool pool_hansolo
   } 
}

  • Nacho_de_Aguina's avatar
    Nacho_de_Aguina
    Icon for Nimbostratus rankNimbostratus
    Nov 08, 2005
    Excuse me, but i´m new with BigIP

     

     

    Should i put this text in the Irule?

     

    Where is going to write the log file?

     

     

    Thanks
  • JRahm's avatar
    JRahm
    Icon for Admin rankAdmin
    Nov 08, 2005
    You can create what I posted as a new rule, or you can update your rule, either way will work. The log command by default logs to /var/log/ltm.

     

  • Nacho_de_Aguina's avatar
    Nacho_de_Aguina
    Icon for Nimbostratus rankNimbostratus
    Nov 08, 2005
    log "Host is [HTTP::host], URI is [HTTP::uri]"

     

     

    This first line gives me this error in the IRule editor

     

     

    01070151:3: Rule [logfile] error:

     

    line 1: [command is not valid in the current scope] [log "Host is [HTTP::host], URI is [HTTP::uri]"]

     

    line 1: [command is not valid in the current scope] [HTTP::host]

     

    line 1: [command is not valid in the current scope] [HTTP::uri]

     

     

     

    If i remove it i can update the irule,
  • JRahm's avatar
    JRahm
    Icon for Admin rankAdmin
    Nov 08, 2005
    Yeah, my bad on that. The first log line should go immediately after the when HTTP_REQUEST, but before your if statement.

     

     

     

    So the rule is doing what it should based on your log information, so the question is, does /magallanes exist on the 150.200.200.4 server, or should the URI be stripped off?

     

  • Nacho_de_Aguina's avatar
    Nacho_de_Aguina
    Icon for Nimbostratus rankNimbostratus
    Nov 08, 2005
    Nov 8 17:34:31 tmm tmm[714]: 01220002:6: Rule logfile : Host is 150.200.200.4, URI is /magallanes

     

    Nov 8 17:34:31 tmm tmm[714]: 01220002:6: Rule logfile : IF successful on URI /magallanes

     

     

    This the result after modify the iRule

     

     

    This means the Irule is working fine?

     

    Is the problem in my VS?

     

     

    Thanks
  • JRahm's avatar
    JRahm
    Icon for Admin rankAdmin
    Nov 08, 2005
    There isn't a problem with the rule or the vip that I can see, check your 10.200.200.4 server to see if /magallanes is a valid directory in your httpd.conf file. I'm guessing you really want to strip the URI once it has been used to determine the server. Try this:

    
when HTTP_REQUEST {
   log "Host is [HTTP::host], URI is [HTTP::uri]"
   if { [HTTP::uri] starts_with "/magallanes" } {
   log "IF successful on URI [HTTP::uri]"
   HTTP::uri "/"
   pool pool_magallanes
   } elseif { [HTTP::uri] starts_with "/hansolo" } {
      log "ELSEIF successful on URI [HTTP::uri]"
      HTTP::uri "/"
      pool pool_hansolo
   }
 }
  • Nacho_de_Aguina's avatar
    Nacho_de_Aguina
    Icon for Nimbostratus rankNimbostratus
    Nov 08, 2005
    Nov 8 17:59:30 tmm tmm[714]: 01220002:6: Rule logfile2 : Host is 150.200.200.4, URI is /magallanes

     

    Nov 8 17:59:30 tmm tmm[714]: 01220002:6: Rule logfile2 : IF successful on URI /magallanes

     

     

    The same as before, and the browser still saying there is no pages, although , the nodes lights are in green, also the pools and the VS

     

     

     

     

  • JRahm's avatar
    JRahm
    Icon for Admin rankAdmin
    Nov 08, 2005
    Have you checked your server? Add this to your rule:

     

     

    when HTTP_RESPONSE {

     

    log "HTTP Status code is [HTTP::status]"

     

    }
  • Nacho_de_Aguina's avatar
    Nacho_de_Aguina
    Icon for Nimbostratus rankNimbostratus
    Nov 08, 2005
    There is no entries in the log file refering anything about the irule that says:

     

     

    when HTTP_RESPONSE {

     

    log "HTTP Status code is [HTTP::status]"

     

    }