iRule to Pool supporting SSL with differnt Host name

If you're referring to simply adding a server SSL profile for when the request flow has to go to the server2 pool, the easiest method is to apply the server SSL profile to the virtual server configuration and disable it for the regular traffic. You can't use the SSL::enable and SSL::disable commands unless an SSL profile is applied to the VIP. Something like this:

when CLIENT_ACCEPTED {
    set default_pool [LB::server pool]
}
when HTTP_REQUEST {
    switch -glob [string tolower [HTTP::uri]] {
        "/login/login.html" {
            pool login_pool
            HTTP::header replace Host "server2.mycompany.com"
        }
        default {
            pool default_pool
            SSL::disable serverside
        }
    }
}