Forum Discussion
Russell_McGinni
Nimbostratus
NimbostratusImplement sticky sessions for a specific uri in VIP
I have a VIP that handles all traffic to a certain domain, however within that domain i have a specific ASP.Net application that uses Session Management and therefore I need to specifically provide a sticky session solution for just that uri
What i have is... but obviously not working... any help would be appreciated.
Thanks
when RULE_INIT {
set ::debug 1
set ::myval 0
}
when HTTP_REQUEST {
if { [HTTP::cookie exists "TIMECLOCKF5"] } {
set cli [IP::remote_addr]:[TCP::remote_port]
set SessionId [HTTP::cookie ASP.NET_SessionId]
if { $SessionId != "" } {
persist uie $SessionId 1800
}
} elseif { [string tolower [HTTP::uri]] starts_with "/timeclock/" } {
set $::myval 1
}
}
when HTTP_RESPONSE {
if {$::myval} {
HTTP::cookie insert name "TIMECLOCKF5" value "testing"
set SessionId [HTTP::cookie ASP.NET_SessionId]
if { $SessionId != "" } {
persist add uie $SessionId 1800
}
}
}
hoolioCirrostratus
You could take a look at the ASP session ID codeshare example to start with:
ASP Session ID Persistence (Click here)
Also, you're using a global variable $::myval to track whether to use persistence. A global variable is accessible and modifiable across all TCP connections, so one connection could overwrite the value from another. If you replace $::myval with $myval, it would be specific to that TCP connection. A local variable is available in all events across the same connection.
Aaron
Russell_McGinniPosted By hoolio on 01/22/2009 6:39 AM
You could take a look at the ASP session ID codeshare example to start with:
ASP Session ID Persistence (Click here)
Also, you're using a global variable $::myval to track whether to use persistence. A global variable is accessible and modifiable across all TCP connections, so one connection could overwrite the value from another. If you replace $::myval with $myval, it would be specific to that TCP connection. A local variable is available in all events across the same connection.
Aaron
I am a little bit of a novice when it comes to iRules, but i did try the codeshare example... i couldnt layer on a filtering mechanism that turned on the persistence only for a specific uri. It seems like the HTTP::uri value is not available in the HTTP_RESPONSE event handler (which is where you add the "session" to the persistence table).
Additionally from further reading it seems that i can only have sticky session persistence if i have a persistence profile defined on the VIP, but then i get sticky sessions for the entire site that the VIP is supporting.
Thanks for your input, more would be greatly appreciated.