Forum Discussion
Jim_Jack_103645
Nimbostratus
Nimbostratusredirect based on uri
We have a pool of servers which we direct our traffic to. Our testers want to be able to choose which server their request goes to by using a querystring.
e.g. we have servers a, b, c, d and e in the pool.
If they use querystring 'lbsc=d' in the uri then we direct traffic to server 'd'
Does anyone have any ideas?
Jim_Jack_103645Here is my first attempt.
It first attempt to see if the request if from a bot and sends to a specialised server if it is
It then looks for the querystring and sends accordingly.
Finaly, if the querystring is not found, it sends to a default pool.
Can I have a peer review?
when HTTP_REQUEST {
if { [matchclass [string tolower [HTTP::header User-Agent]] contains $::bots] } {
is a bot .. send to the bot server
pool MIS-BOT50-DM
} else {
regular traffic
set v1 [URI::query [HTTP::uri] "lbsc"]
switch { v1 } {
"c" {
pool MIS-WEB50C
}
"d" {
pool MIS-WEB50D
}
"e" {
pool MIS-WEB50E
}
"f" {
pool MIS-WEB50F
}
default {
pool MIS-WEB50-DM
}
}
}
}
hoolioCirrostratus
That looks like a good start. I think your switch statement is slightly off though. Are you ever seeing traffic go to any but the default pool?
I think {v1} would be evalutated as a literal string of v1, not the variable value for $v1. Regardless, you can avoid using the variable altogether.switch [URI::query [HTTP::uri] "lbsc"] { "" { pool MIS-WEB50-DM } "c" { pool MIS-WEB50C } "d" { pool MIS-WEB50D } "e" { pool MIS-WEB50E } "f" { pool MIS-WEB50F } default { pool MIS-WEB50-DM } }
If most of your requests won't have the lbsc parameter set, you could have the first test in the switch be "".
Aaron- Jim_Jack_103645Thanks :-)
- Jim_Jack_103645This works, but only for the first request. Subsequent requests are directed to other servers in the pool, I asume by persistence. Is there any way to switch it off and persist to the requested node??
when HTTP_REQUEST {
if { ([matchclass [string tolower [HTTP::header User-Agent]] contains $::bots])
or
([ matchclass [ IP::client_addr ] equals $::bot_ips ]) } {
is a bot .. send to the bot server
pool MIS-BOT20-01
} else {
regular traffic
switch [URI::query [HTTP::uri] "lbsc"] {
"" {
pool MIS-WEB20-1
}
"c" {
node 10.60.1.234
}
"d" {
node 10.60.1.104
}
"e" {
node 10.60.2.124
}
"f" {
node 10.60.2.6
}
"g" {
node 10.60.2.55
}
"botc" {
node 10.60.1.134
}
"botd" {
node 10.60.2.34
}
default {
pool MIS-WEB20-1
}
}
}
} - Jim_Jack_103645I tried to add cookie persistence to the irule to no effect:
when HTTP_REQUEST {
if { ([matchclass [string tolower [HTTP::header User-Agent]] contains $::bots])
or
([ matchclass [ IP::client_addr ] equals $::bot_ips ]) } {
is a bot .. send to the bot server
pool MIS-BOT20-01
} else {
regular traffic
switch [URI::query [HTTP::uri] "lbsc"] {
"" {
pool MIS-WEB20-1
}
"c" {
persist cookie
node 10.60.1.234
}
"d" {
persist cookie
node 10.60.2.104
}
"e" {
persist cookie
node 10.60.2.124
}
"f" {
persist cookie
node 10.60.2.6
}
"g" {
persist cookie
node 10.60.2.55
}
"botc" {
persist cookie
node 10.60.1.134
}
"botd" {
persist cookie
node 10.60.2.34
}
default {
pool MIS-WEB20-1
}
}
}
} - Apply a OneConnect profile to the virtual, and you should see that each request on the same connection is evaluated & routed to the desired pool. (Without OneConnect, the first pool chosen is used for the life of the connection.)
HTH
/deb
