Append domain when needed and redirect to HTTPS

 Datagroup mapping the VS IP to hostname
class redirect_vs_to_host_class {
   {
      host 1.1.1.1 { "vs1.example.com" }
      host 1.1.1.2 { "vs2.example.com" }
      host 1.1.1.3 { "vs3.example.com" }
   }
}

 iRule which references the above datagroup
when HTTP_REQUEST {

    Look up the VS IP in the IP to hostname datagroup
   set match [class search -value redirect_vs_to_host_class equals [IP::local_addr]]

    If a match was found redirect to the hostname from the class 
   if {$match ne ""}{
      HTTP::redirect https://$match[HTTP::uri]
   } else {
       Take some default action?
      HTTP::redirect https://[HTTP::host][HTTP::uri]"
   }
}