Forum Discussion
Rob_Wotton_8024
Nimbostratus
NimbostratusMultiple Pool Redirection Based on IP
Hi
I am struggling with an iRule at the moment, in simple English when the URI starts with /product1 and is from IP address 1.1.1.1 we need to use pool product1-CustomerA. If the URI starts with /product1 and is requested by any other IP address then it needs to use pool product1.
I have written the below iRule but it only works if the IP is 1.1.1.1, the else statement doesn't seem to work, I am also not sure the rest of my syntax is correct as sometimes it works and other times it doesn't.
Anyhelp would be appreciated.
Thanks
Rob
when HTTP_REQUEST {
if { [IP::addr [IP::client_addr]/32 equals 1.1.1.1] } {
switch [string tolower [HTTP::uri]] {
"/product1" {
pool product1-CustomerA
}
"/product2" {
pool product2-CustomerA
}
"/product3" {
pool product2-CustomerA
}
default {
pool standardpool-CustomerA
}
else {
switch [string tolower [HTTP::uri]] {
"/product1" {
pool product1
}
"/product2" {
pool product2
}
"/product3" {
pool product2
}
default {
pool standardpool-CustomerB
}
}
}
}
}
}
}
7 Replies
hoolioCirrostratus
Hi Rob,
That looks pretty close. Can you try this version with some debug logging added? I used the -glob flag on switch to group of few of the cases together. The curly braces also needed a tweak.when HTTP_REQUEST { log local0. "[IP::client_addr]:[TCP::client_port]: New [HTTP::method] request to [HTTP::host][HTTP::uri]" if { [IP::addr [IP::client_addr]/32 equals 1.1.1.1] } { log local0. "[IP::client_addr]:[TCP::client_port]: Matched IP check for 1.1.1.1" switch -glob [string tolower [HTTP::uri]] { "/product[1-3]" { log local0. "[IP::client_addr]:[TCP::client_port]: Matched /product1-3 check" pool product1-CustomerA } default { log local0. "[IP::client_addr]:[TCP::client_port]: No match on /product1-3 check" pool standardpool-CustomerA } } } else { switch -glob [string tolower [HTTP::uri]] { "/product1" { log local0. "[IP::client_addr]:[TCP::client_port]: No IP match. Matched /product1 check" pool product1 } "/product[2-3]" { log local0. "[IP::client_addr]:[TCP::client_port]: No IP match. Matched /product2-3 check" pool product2 } default { log local0. "[IP::client_addr]:[TCP::client_port]: No IP match. No product check" pool standardpool-CustomerB } } } }
Aaron
Rob_Wotton_8024Thanks Aaron - I will try that now.- hoolioOne other thing I meant to ask about: the URI tokens you have listed in the switch cases are equals comparisons. I assume the URIs won't always be exactly /product. Do you want to select the pool based on the URI starting with /product? If so, try adding a * to the end of each switch case:
/product[1-3] would be /product[1-3]*
and
/product1 would be /product1*
Aaron - hoolioYou can view the logs in the GUI under System | Logs | Local Traffic. Or more ideally, access the CLI via SSH and run 'tail -f /var/log/ltm' without the single quotes to follow the end of the ltm log file. You can type Ctrl+c to stop the tail from running.
Also, I think * will match 0 or more characters. So /test* would match /test:when RULE_INIT { switch -glob "/test" { "/test*" {log local0. "matched"} default {log local0. "no match"} } }
Log output:
: matched
And using string match to test:
% string match /test* /test
1
Or is that not what you meant?
Aaron - Rob_Wotton_8024Thanks for the logs, have found those.
I am still a little confussed by the * part.
If I enter "http://10.44.17.90/product1" into a browser, I get a 404 page not found error.
If I enter "http://10.44.17.90/product1/default.htm" it returns the page.
The iRule part of this is:-
switch -glob [string tolower [HTTP::uri]] {
"/product1*" {
log local0. "[IP::client_addr]:[TCP::client_port]: Matched /product1 check"
pool product1
}
I am not sure if it matters as the pages are called explicitly from our main portal, it would just be nice to have it work. - hoolioHi Rob,
LTM isn't modifying the requested URI in your iRule--just selecting the pool based on the URI. If you make the same request for /product1 direct to the web server, I expect that you'll see the same 404 response.
If you want to rewrite requests made to /product1 to /product1/default.htm, you could use HTTP::uri "/product1/default.htm" to do this. Or if you want the client to see the update, you could redirect them using HTTP::redirect "http://[HTTP::host]/product1/default.htm".
Aaron - Rob_Wotton_8024Hi Aaron.
Many thanks for your help, we have now been able to get this through our test environment. Next stop production!
Thanks
Rob
