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] "
} }
Ashish1982k_242Altostratus
AltostratusBetter view of iRule:
when HTTP_REQUEST {
if { [HTTP::cookie exists gcbSessionServer] } {
switch [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
}
} }
else {
pool /Common/cct-cobrowse-ct.app/cct-cobrowse-ct_pool
log local0. " Selected pool [LB::select] "
}
}