Send a request to all pool members?

Hi,

 

 

There isn't a simple way with LTM to broadcast TCP traffic to all pool members. People have tried serially retrying a request but I don't think it's feasible to do with production traffic.

 

 

Aaron

In few cases, using the "log" command with external IP of SYSLOG servers is a way (even if it is not very "standard") to do this kind of job. Perhaps we can imagine something like that (should work between 2 boxes, not sure if this can work on the same box). On your standard VS, send the request to "broadcast" to all the nodes of a pool, using the "log" command and targetting another VS in charge of reverting the syslog message to an HTTP REQUEST (my example take care only of the HTTP request, not the headers, cookies and so on): like: when HTTP_REQUEST { if { [HTTP::uri] ends_with "/broadcast"}{ log 2.2.2.2 local0.info "NODE-IP:1.2.3.4 - URI:[HTTP::uri]" local0.info "NODE-IP:1.2.3.5 - URI:[HTTP::uri]" local0.info "NODE-IP:1.2.3.6 - URI:[HTTP::uri]" } } On the VS 2.2.2.2, port 514 UDP, create another iRule, in charge of catching the trafic, converting it to the original URI, and sending it using the pool member ... command, to the node extracted from the log. It is not a very beautiful way to do the job, but it is an idea ;-)

Hi, I tried looking up in the wiki, and the commands make me wonder if i could do something like

set poolName [LB::server pool]
pool $poolName member 192.168.10.100 80
clone pool $poolName member 192.168.10.101 80

But I have to specify all the members in the pool, and if it changes I have to modify the rule too.

Given that the command [active_nodes -list [LB::server pool]] returns the list of the active members' IP, is there a way to cycle the clone?

Something like this could help?