Forum Discussion
domi_232490
Nimbostratus
Nimbostratuscookie persistance
Hi,
I'm trying to make LB to decide based on server attached cookie.
Client asks for a page from intermediate server > it goes to LB which based on URI sends it to appropriate pool. Back-end server ...
domi_232490Nimbostratus
NimbostratusHello,
thank you all for for your comments, sorry for being late had a problem uploading reply.
I will try to answer to questions and explain better.
@cjunior - The answer to the questions 1 and 2 answer is yes.
Last question: After IM server gets reply to the initial request from back-end server, it has cookie named SAP set by back-end server and it BigIp cookie set by LB. IM server edits the reply and forwards to the client which makes it to go back directly to LB (different domain which leads it to Virtual server but same URI) and should be redirected to the same back-end server based on SAP cookie where initial request was authenticated and authorized. When, round robin accidentally chooses same backend I get the page otherwise I get blank page.
On client I can see two BigIP cookies and one SAP cookie. So the main point and idea from my perspective is to force LB to decide on SAP cookie and ignore the BigIP one. Of course other conditions in http_request check shouldn't be affected.
Somehow iRule should be edited to decide on cookie SAP if it's in the request if it isn't > go to dedicated pool (first request).
@ FKnuckles: Will check and confirm on cookie hash persistence.
Here is the requested part of config:
ltm virtual /Common/Z4-P8 {
description "Z4-P8"
destination /Common/10.1.2.239%4:80
ip-protocol tcp
mask 255.255.255.255
persist {
/Common/P8-cookie {
default yes
}
}
pool /Common/SERVERFARM_P8-AE-TEST
profiles {
/Common/custom_client_TCP { }
/Common/http-P8 { }
}
rules {
/Common/Z4_p8_redirect
}
source 0.0.0.0%4/0
source-address-translation {
pool /Common/Z4-SNAT25
type snat
}
translate-address enabled
translate-port enabled
vlans {
/Common/Z4-VLAN20
/Common/Z4-VLAN20
}
vlans-enabled
}
ltm persistence cookie /Common/P8-cookie {
app-service none
defaults-from /Common/cookie
expiration 1:0:0
timeout 180
}
ltm rule /Common/Z4_p8_redirect {
when HTTP_REQUEST {
switch -glob [string tolower [HTTP::uri]] {
"/dd*"
{
pool Z4-P8-7001-2
persist cookie insert 01:00:00
}
"/sap/icn*"
{
pool Z4-P8-ICN-7001-2
persist cookie insert 01:00:00
}
"/activity*"
{
pool Z4-P8-7002-3
persist cookie insert 01:00:00
}
"/sap*"
{
pool Z4-P8-7004-5
persist cookie insert 01:00:00
}
default { return }
}
log local0.info "pool selected: [LB::server pool] [HTTP::uri]"
}
}
Thanks
