Dear All, I need a solution on IRULE for example to solve the following scenario: I have 10 servers that will receive XML requests. the unique ID in each XML request will be a number such as: 965123239490 now I want to direct the traffic depends on the last digit on that number. So, the traffic in "if else" style will be as follow: { if request ends with digit 0 in the number --> send it to server 1 in case server 1 down --> send it to server 2 } if request ends with digit 1 in the number --> send it to server 2 in case server 2 down --> send it to server 3 } if request ends with digit 2 in the number --> send it to server 3 in case server 3 down --> send it to server 4 } etc..... appreciate your support on how to get this down using F5 LB. Thanks in advance. Mohamed.

If you can send an example of the XML request that'd help in building an actual iRule. Otherwise, when HTTP_REQUEST { some function to parse out the digits from the xml request switch -glob $digit { "*0" { if { [LB::status node 10.10.10.1] eq "up" } { node 10.10.10.1 80 } else { node 10.10.10.2 80 } } "*1" { if { [LB::status node 10.10.10.2] eq "up" } { node 10.10.10.2 80 } else { node 10.10.10.3 80 } } "*2" { if { [LB::status node 10.10.10.3] eq "up" } { node 10.10.10.3 80 } else { node 10.10.10.4 80 } } default { send to a default pool or node } } } Of course this doesn't deal with any type of persistence and what happens if the failover node is also down.

Okay, well there's an XML xpath way to do this with the XML_CONTENT_BASED_ROUTING event and an XML profile, but for such a small set of data that's probably more complicated than a single string parse. when HTTP_REQUEST { if { [HTTP::header Content-Type] contains "xml" } { HTTP::collect [HTTP::header Content-Length] } } when HTTP_REQUEST_DATA { set number [string trim [findstr [HTTP::payload] "" 8 ""]] enable for testing log local0. "number = $number" now that you have the number you can add the switch code to find the last digit }I'm making an assumption of course that the XML request has a Content-Type header with the word "xml" in it, and I'm also not accounting for what might happen if the request isn't xml, but I hope this gets you going in the right direction.

Almost. You're assigning your XML value to the number variable, so the switch statement should reflect that: switch -glob $number

Hi Kevin, i tried to apply the following IRULE: when HTTP_REQUEST { if { [HTTP::header Content-Type] contains "xml" } { HTTP::collect [HTTP::header Content-Length] } when HTTP_REQUEST_DATA { set msisdn [string trim [findstr [HTTP::payload] "" 8 ""]] enable for testing log local0. "msisdn = $msisdn" } when HTTP_REQUEST { some function to parse out the digits from the xml request switch -glob $msisdn { "*0" { if { [LB::status node 10.10.10.1] eq "up" } { node 172.24.248.85 8580 } else { node 172.24.248.85 8680 } } "*1" { if { [LB::status node 10.10.10.2] eq "up" } { node 172.24.248.85 8580 } else { node 172.24.248.85 8680 } } default { send to a default pool or node } } } } but i got an error: 01070151:3: Rule [UCIP_MSISDN] error: line 6: [command is not valid in the current scope] [when HTTP_REQUEST { set msisdn [string trim [findstr [HTTP::payload] "" 8 ""]] enable for testing log local0. "msisdn = $msisdn" }] line 12: [command is not valid in the current scope] [when HTTP_REQUEST { some function to parse out the digits from the xml request switch -glob $msisdn { "0" { if { [LB::status node 10.10.10.1] eq "up" } { node 172.24.248.85 8580 } else { node 172.24.248.85 8680 } } "1" { if { [LB::status node 10.10.10.2] eq "up" } { node 172.24.248.85 8580 } else { node 172.24.248.85 8680 } } default { send to a default pool or node } } }] appreciate your feedback.

Hi, appreciate your help please

Forum Discussion

Al-Mutlaq_21911

Nimbostratus

Aug 26, 2015

direct traffic based on information from the XML request

Dear All,

I need a solution on IRULE for example to solve the following scenario:

I have 10 servers that will receive XML requests. the unique ID in each XML request will be a number such as:

965123239490

now I want to direct the traffic depends on the last digit on that number. So, the traffic in "if else" style will be as follow:

{ if request ends with digit 0 in the number --> send it to server 1 in case server 1 down --> send it to server 2 } if request ends with digit 1 in the number --> send it to server 2 in case server 2 down --> send it to server 3 } if request ends with digit 2 in the number --> send it to server 3 in case server 3 down --> send it to server 4 }

etc.....

appreciate your support on how to get this down using F5 LB.

Thanks in advance. Mohamed.

availability

deployment