Forum Discussion
NimbostratusHave Passive monitor iRule skipped if url contains
We are trying to setup a passive iRule that will mark a load balanced member down if it gets a number of errors from the server. I found an example of one and it seems to work OK however our developers stated that some of the API calls the develop can return a 500 error and that is to be expected. Luckily all the API stuff is under a /services/ url. Is there an easy way to take the code below and have it just exit the rule if the url contains /services/ in the url?
when HTTP_REQUEST {
if { not [info exists orig_request]} {
set orig_request [HTTP::request]
}
}
when HTTP_RESPONSE {
if { [HTTP::status] >= 500 } {
set failures [session lookup dest_addr [LB::server addr]]
if { $failures >= 3 } {
LB::down
log local0.warning "Pool member down for '[LB::server addr]' - May want to investigate"
} else {
session add dest_addr [LB::server addr] [incr failures]
LB::detach
HTTP::retry $orig_request
}
}
}Reference URL:
F5 Friday - Eavesdropping on avialability
3 Replies
jgranieriPerhaps adding something like this will allow the traffic to continue on. It would be another if statement in your existing code
when HTTP_REQUEST { if { [HTTP::uri] contains "/services/ url" } { default pool XYZ } }
VernonWellsEmployee
You could, at the top of HTTP_RESPONSE, do the following:
when HTTP_RESPONSE { if { [HTTP::path] starts_with "/services/" } { return } ... all of your code here ... }Alternatively, you could wrap all of your code in a negating if:
when HTTP_RESPONSE { if { not ([HTTP::path] starts_with "/services/") } { ... all of your code in here ... } }
Robberhines_120As a side comment, I seem to be getting a TCL error when trying to increment:
TCL error: /common/count_server_down - expected integer but got "" while executing "incr failures"I have since found this F5 Solution: F5 - SOL7440 Is one solution better than another?
