URL request rewrite with load balance

Why explicitly identify the server in a redirect, rather than making "abc" resolve to a Virtual Server (which them load balances to the backend servers)? You don't appear to be rewriting any part of the query-uri for the two cases. All other things being equal, that is by far the easiest way to accomplish this.

Thank you Vernon,

the is a backend Virtual server , I did a irule to redirect to one of URL, but always redirect one URL, i hope can redirect to 2 URLs with load balance method:

when HTTP_REQUEST { switch -glob [string tolower [HTTP::uri]] { default { HTTP::redirect "" } } }

Hi Titan,

the iRule below performs a simple round robin redirect to either server1 or server2...

when RULE_INIT {
    set static::report_nodes "server1 server2"
}
when HTTP_REQUEST {
    set random_report_node [lindex $static::report_nodes [expr {int(rand()*[llength $static::report_nodes])}]]
    HTTP::redirect "http://$random_report_node/Reports_MSSQLSERVER12/Pages/Folder.aspx?ItemPath=%2fReports&ViewMode=List"
}

If you want to health-monitor your report servers, so that clients are not getting redirected to offline nodes, then you have to create a pool and some health-monitors for your report servers. The iRule below can then be used to randomly select an available report server...

when RULE_INIT {
    array set static::report_server_names {
        "192.168.1.1%1 80" "server1"
        "192.168.1.2%1 80" "server2"
    }
}
when HTTP_REQUEST {
    if { [active_members POOL_REPORT_SERVERS] > 0 } then {
        set active_report_nodes [active_members -list POOL_REPORT_SERVERS]
        set random_report_node [lindex $active_report_nodes [expr {int(rand()*[llength $active_report_nodes])}]]
        HTTP::redirect "http://$static::report_server_names($random_report_node)/Reports_MSSQLSERVER12/Pages/Folder.aspx?ItemPath=%2fReports&ViewMode=List" 
    } else {
        HTTP::redirect 200 content "The report server are offline..."
    }
}

Cheers, Kai