Multiple actions form single URL with iRule

Hey Adam,

 

 

I suspect that there are better solutions than this, but the first thing that comes to mind is to use the node command ( http://devcentral.f5.com/wiki/default.aspx/iRules/node.html ) to send the requests to the specific servers. This would be fairly simple. The iRule to do this might look something like:

 

 

when HTTP_REQUEST {

 

switch -glob [string tolower [HTTP::path]] {

 

"/flush/1/" { node 10.0.0.1 80 }

 

"/flush/2/" { node 10.0.0.2 80 }

 

"/flush/3/" { node 10.0.0.3 80 }

 

"/flush/4/" { node 10.0.0.4 80 }

 

}

 

}

 

 

I don't believe that there is a method to turn a single HTTP request from a client into multiple requests to nodes. The HTTP::retry command might be able to accomplish this, but I'm not having much luck figuring out the best way to iterate through all of the pool members in a retry attempt - or even if this would work.

 

 

What might actually be a better solution is to modify the switch statement above to respond with a page that would call itself several times to do this. Something like...

 

 

when HTTP_REQUEST {

 

switch -glob [string tolower [HTTP::path]] {

 

"/flush/" { HTTP::respond 200 content {

 

 

 

 

 

 

Cache Flushing

 

 

Currently Flushing Cache

 

} }

 

"/flush/1/" { node 10.0.0.1 80 }

 

"/flush/2/" { node 10.0.0.2 80 }

 

"/flush/3/" { node 10.0.0.3 80 }

 

"/flush/4/" { node 10.0.0.4 80 }

 

}

 

}

 

 

I haven't tested this, but it at least parses. You could use any type of link that a browser will automatically follow, img tags, javascript links, etc. Just anything to get the browser to try to follow the links automatically.

 

 

Hope this helps some!

 

 

// Ben