Forum Discussion
Ashish1982k_242
Altostratus
AltostratusiRule for cookie based load balancing
I am trying to create an iRule to load balance on cookie data.
cookie Name- gcbSessionServer
I am using below code but it is giving error
May 31 11:10:20 ttncltmxza-p err tmm[17866]: 0122...
I am using below iRule and it works. I have single servers in pool and if the server is down LTM was throwing error.
when HTTP_REQUEST {
if { ([HTTP::cookie exists gcbSessionServer]) } {
if { ([HTTP::cookie value "gcbSessionServer"] contains ".Co-browse_TENCBSD0_Node1") and ([active_members cct-cobrowse-ct-node-1_pool] > 0)} {
pool cct-cobrowse-ct-node-1_pool
log local0. " COOKIE->[HTTP::cookie value "gcbSessionServer"] Selected pool [LB::select] " }
elseif { ([HTTP::cookie value "gcbSessionServer"] contains ".Co-browse_TENCBSD1_Node2") and ([active_members cct-cobrowse-ct-node-2_pool] > 0)} {
pool cct-cobrowse-ct-node-2_pool
log local0. " COOKIE->[HTTP::cookie value "gcbSessionServer"] Selected pool [LB::select] " }
elseif { ([HTTP::cookie value "gcbSessionServer"] contains ".Co-browse_TENCBSD2_Node3") and ([active_members cct-cobrowse-ct-node-3_pool] > 0)} {
pool cct-cobrowse-ct-node-3_pool
log local0. " COOKIE->[HTTP::cookie value "gcbSessionServer"] Selected pool [LB::select] " }
else {
LB::mode rr
pool /Common/cct-cobrowse-ct.app/cct-cobrowse-ct_pool
log local0. " COOKIE FOUND Selected pool [LB::select] "
} }
else {
LB::mode rr
pool /Common/cct-cobrowse-ct.app/cct-cobrowse-ct_pool
log local0. " NO COOKIE Selected pool [LB::select] "
} }
youssef1
Cumulonimbus
CumulonimbusHi,
I don't think you need to check if the cookie exists first, as HTTP::cookie value will return a null length string even if the cookie name doesn't exist.
Your problem is that "[HTTP::cookie exist "gcbSessionServer"]" have to return 0 or 1 but it seems that in your irule is empty.
so try this, we can try another thing if it's not working
when HTTP_REQUEST {
switch -glob ([HTTP::cookie value "gcbSessionServer"]) {
".Co-browse_TENCBSD0_Node1" { pool cct-cobrowse-ct-node-1_pool }
".Co-browse_TENCBSD0_Node2" { pool cct-cobrowse-ct-node-2_pool }
".Co-browse_TENCBSD0_Node3" { pool cct-cobrowse-ct-node-3_pool }
default {
pool /Common/cct-cobrowse-ct.app/cct-cobrowse-ct_pool
log local0. " Selected pool [LB::select] "
}
}
}
keep me in touch.
Regards