Forum Discussion
Nick_Matthews
Altostratus
AltostratusiRule Universal Persistence
Hi,
I am hoping someone can help with this issue, or at least point me in the right direction.
I have 2 VS using the same VIP running on port 80 and 443.
I have no default pool selected on these VS, as I am using iRules to do this as shown below:
when HTTP_REQUEST {
Check the URI, set to lowercase
switch -glob [string tolower [HTTP::uri]] {
"/Folder1/*" -
"/Folder2/*" -
"/Folder3/*" {pool HTTP-ThirdParty}
default {pool HTTP-MainSite}
}
}
and
when HTTP_REQUEST {
switch -glob [string tolower [HTTP::uri]] {
"/Folder1/*" -
"/Folder2/*" -
"/Folder3/*" pool HTTPS-ThirdParty}
default { pool HTTPS-MainSite }
}
}
This works fine.
I am then using Universal Match Across Services persistence profile from this example:
https://devcentral.f5.com/wiki/iRul...tence.ashx
So the match across services for HTTP and HTTPS works fine because the pool has the same member ip's. But anything that goes to the pool HTTPS-ThirdParty and HTTP-ThirdParty doesn't set its own persistence.
We require persistence across our third party apps as well, so I attempted to modify the iRule to add persistence using a differently named cookie for the other pool like this:
when HTTP_REQUEST {
if { ([LB::server pool] eq "/Common/HTTP-MainSite") } {
if { [HTTP::cookie value "cookieMainWebsite"] ne "" } {
persist uie [HTTP::cookie value "cookieMainWebsite"]
set need_cookie 0
} else {
set need_cookie 1
}
}
if { ([LB::server pool] eq "/Common/HTTP-ThirdParty") } {
if { [HTTP::cookie value "cookieThirdParty"] ne "" } {
persist uie [HTTP::cookie value "cookieThirdParty"]
set need_cookie 0
} else {
set need_cookie 1
}
}
}
when PERSIST_DOWN {
set need_cookie 1
}
when HTTP_RESPONSE {
if { $need_cookie } {
if { ([LB::server pool] eq "/Common/HTTP-MainSite") } {
HTTP::cookie insert name "cookieMainWebsite" value [IP::server_addr] path "/"
persist add uie [HTTP::cookie value "cookieMainWebsite"]
}
if { ([LB::server pool] eq "/Common/HTTP-ThirdParty") } {
HTTP::cookie insert name "cookieThirdParty" value [IP::server_addr] path "/"
persist add uie [HTTP::cookie value "cookieThirdParty"]
}
}
}
I suspect my expression when I attempt to check the current pool isn't quite right. Hopefully you can understand what I am trying to achieve, but please ask for clarification on any bits that are unclear.
nitassEmployee
in HTTP To HTTPS Cookie Persistence irule, can you try to append "priority 600" to HTTP_REQUEST event?
from
when HTTP_REQUEST {
to
when HTTP_REQUEST priority 600 {- nitasswhen HTTP_REQUEST {
Check the URI, set to lowercase
switch -glob [string tolower [HTTP::uri]] {
"/Folder1/*" -
"/Folder2/*" -
"/Folder3/*" {pool HTTP-ThirdParty}
default {pool HTTP-MainSite}
}
}
by the way, in production irule, F is actually in lower case, isn't it? 
Nick_MatthewsHi Nitass,
Thanks for your posts.
I will give the priority 600 a try. What exact does that do?
Yes, you are correct, the actual URL redirection locations are in lower case.- Nick_MatthewsSorry Nitass,
I have searched and found out what Priorty does. I will give that a try in a moment. - Nick_MatthewsHi Nitass,
adding priority 600 has fixed the problem,
Thank you very much for your help.