Forum Discussion
AltocumulusNeed help with iRule based on host and path
Hello all.
I am trying to create an iRule that will choose a specific pool based on host and path. I tried the following code:
when HTTP_REQUEST {
if { [HTTP::host] equals "hostname_a"} {
if { [HTTP::path] equals "/path" } {
pool pool_a
log local0. "URL : [HTTP::host][HTTP::uri] entered"
}
}
if { [HTTP::host] equals "hostname_b"} {
if { [HTTP::path] equals "/path" } {
pool pool_b
log local0. "URL : [HTTP::host][HTTP::uri] entered"
}
}
}
According to Big-IP stats, the iRule gets executed but it doesnot direct the call to the pool (pool stats shows 0) specified although logging is invoked and I get the URL in the ltm logs.
Right after this script there is another one which gets executed and works as it should be. It specifies even more conditions for a series of pools and if none is matched then directs the call to the default pool specified there.
The problem is with the first one. I would like it to be executed and unless there is a match, then it should proceed to executing the second one.
If you can give me some advice it would be highly appreciated. Thank you.
Finally, problem solved! The reason was the order of execution for the 2 scripts. I donot really understand why this happens but when I placed the script in second place, everything is executed as expected. If you have any ideas please let me know.
The problematic order which doesnot work is shown below:
First script:
when HTTP_REQUEST {
if { [HTTP::host] equals "hostname_a"} {
if { [HTTP::path] equals "/path" } {pool pool_a
log local0. "URL : [HTTP::host][HTTP::uri] entered"
}
}
if { [HTTP::host] equals "hostname_b"} {
if { [HTTP::path] equals "/path" } {pool pool_b
log local0. "URL : [HTTP::host][HTTP::uri] entered"
}
}
}Second script:
when HTTP_REQUEST {
if {[HTTP::has_responded]}{return}
switch -glob [string tolower [HTTP::path]]
{....
....
}
default
{
switch [string tolower [HTTP::host]]
{"hostname_a"
{
pool pool_c
persist none}
....
.....
default
{
pool_z
}
......
Anyway, thank you all very much for your time.
