Load Balancing Multiple pool members

Surelt it can be done using iRule.

Check the below link to implement how you like to get on

https://devcentral.f5.com/articles/irules-101-05-selecting-pools-pool-members-and-nodes

You can distribute traffic to different pools for specific url or uri s. Do you wish just wish to distribute requests among the pools in round-robin manner?

Hello -

My requirement is to create three pools - pool0, pool1 and pool2. All these pools go under one virtual server IP. (In virtual server configuration, there is only default app pool drop down).

Under each pool (pool0, pool1 and pool2) there are three nodes - node0, node1 and node2.

I come from a citrix world where i can configure this as three servicegroups under a vserver. I cannot seem to find how to implement this in F5.

Thanks!

please note: this is for load-balancing tcp profile pools. And all the pools are identical.

I think I came up with something 🙂 Please suggest what you think.

when RULE_INIT {
  set ::active_connections 0
}

when CLIENT_ACCEPTED {
  if {$::active_connections % 3==0) then {
     incr ::active_connections 1
     pool pool0
  } elseif {$::active_connections % 3==1) then {
     incr ::active_connections 1
     pool pool1
  } elseif {$::active_connections % 3==2) then {
     incr ::active_connections 1
     pool pool2
  }
}

when CLIENT_CLOSED {
  incr ::active_connections -1
}

By using a non static global variable (in RULE_INIT), you have demoted your virtual to run on only one CPU. In other words, you have disabled "Clustered Multi Processing (CMP)" for that virtual.

Try using "table incr" and "table lookup" commands instead.

iRule table commands

to increment and lookup use:

    set active_connections [table incr "connections"]
    if {...}


when CLIENT_CLOSED {
  table incr "connections" -1
}