Message based load balancing connection status

Hi Vincent,

 

 

(1) When there are no active members in the pool (all backend nodes are down), how can I close the client connection?

 

 

you may try this way...

 

note that return value of active_members may not be the same as number of current active connection for the particular client connection.

 

 

you could keep track that by using variable. here are 2 examples

 

 

 example I
when CLIENT_ACCEPTED {
     check every second
    after 1000 -periodic {
        if { [active_members [LB::server pool]] == 0 } {
            reject
            log local0. "TCP connection closed to [TCP::local_port]."
        }
    }
}
 example II
when CLIENT_ACCEPTED {
    array set server_array {}
     check every second
    after 2000 -periodic {
        if { [array size server_array] == 0 } {
            reject
            log local0. "TCP connection closed to [TCP::local_port]."
        }
    }
}
when SERVER_CONNECTED {
    set s "[IP::remote_addr] [TCP::remote_port]"
    set server_array($s) 1
}
when SERVER_CLOSED {
    set s "[IP::remote_addr] [TCP::remote_port]"
    unset server_array($s)
}

 

 

(2) to periodically send somethig to server every 30 seconds, you can do as follow

 

 

 

 

when SERVER_CONNECTED {

 

send ping every 30 seconds

 

after 30000 -periodic {

 

you could add some code to check idletime here...

 

TCP::respond $static::conn_ping

 

}

 

}

 

 

 

 

 

May I ask what is your use case that you are using mblb profile for?

 

This information would help us improve future version of mblb profile 🙂

 

 

Thanks,

 

Nat

 

v