Wil_Schultz_101
Jul 30, 2007Nimbostratus
Reselect pool on status code 500 or above...
So we run some Tomcat servers, when we undeploy the server will send a 503 that states that the application is unavailable. I do have a check that looks for a static page every 5 seconds and fails at 16 seconds, however for that 16 second period people from the outside world see this 503 error.
I would like to set it up to where any status code above 500 reselects but I seem to have an order of operation problem. Maybe someone that i saner than I might have a suggestion?
Here is what I have so far:
when HTTP_RESPONSE {
if { [HTTP::status] > 499 }{
set ::hostfailed 1
log local0. "Setting up ::hostfailed."
}
}
when LB_SELECTED {
if { $::hostfailed == 1 } {
LB::detach
LB::reselect [LB::server pool]
log local0. "LB failed, re-load balancing to pool."
}
}
This irule fails because LB_SELECTED us called after HTTP_RESPONSE and ::hostfailed is not set.