Redirecting to a webpage when all the health check fails to the memerbs o the pool

Hi

 

 

I would try this quite simple iRule :

 

 

when LB_FAILED {

 

HTTP::redirect http://192.168.1.150/sorry.html

 

}

 

 

Fred

 

Please also check this post. BTW, the problem mentioned on that thread has already been fixed and will be available on the release (v9.4) which should be coming out soon. Click here

Is there any reason to not just use the fallback host option in the HTTP profile?

 

 

I suppose triggering the redirect on LB_FAILED ensures that the client will be redirected on any connection that fails as opposed to waiting for the monitors to mark all nodes down. Though in theory, the request is what the fallback host was designed for.

 

 

Aaron

LB Failed option wil redirect to a new pool if the LB couldnt get to the pool. My requirement says that when the httpd daemon stops running the server or the servers in the pool are down due to outage the client accessing the webpage will get error 404 "webpage not found" instead of getting this page client wanted to redirect a direct webpage given by them. I finally figured a solution but have no idea whether it wil work awaiting for customer approval to implement and check.

 

 

here is the irule i suggested

 

 

when HTTP_RESPONSE {

 

if { [HTTP::status] contains "404"} {

 

HTTP::redirect "http://www.millsberry.com/999_DB_ERROR.phtml"

 

}

 

}

 

I am running 9.1.2 and I am trying to accomplish similiar redirect.

 

I have tried fallback host , but works on any node down ( or not reachable

 

eg. timeout). I also tried LB:; Failed, but had similiar results?

 

 

My question to group is your opinion on following irule to redirect when all

 

nodes in pool down to error page.

 

TIA...Be gentle I am newbie at irules :-)

 

 

rule minmembers {

 

when HTTP_REQUEST {

 

if { [active_members VistaHttp] < 1 } {

 

HTTP::redirect http://so-mako.sysoff.ctstateu.edu/Vista-fa.nsf/VT-LBF?OpenForm

 

}

 

}

 

}

It seems when I used fallback host that it triigered when any node was unreachable ( not down)eg. server wa sbusy etc. I only want the redirection when all nodes in pool are down.

 

The clients are then redirected to error page on alternate server. Thanks for reply.

Gotcha. Thanks for following up.

 

 

Colin

I am having the same issue, except I am redirecting many applications across many virtual servers.

 

 

Would it be safe to apply the same logic by using the following code or is there a more effecient way to handle showing a page when the pool members are down?

 

 

when RULE_INIT {
   set down_response "
}
when HTTP_REQUEST {
switch [getfield [string tolower [HTTP::uri]] "/" 2] {
app1 { 
if { [active_members p1] < 1 } {
HTTP::respond $down_response
} else {
pool p1 
}
app2 {
if { [active_members p2] < 1 } {
HTTP::respond $down_response
} else {
pool p2
}
  ...
appN { 
if { [active_members pN] < 1 } {
HTTP::respond $down_response
} else {
pool p1 
}
default { pool p_default }
}
}