multi site varnish config

varnish

backend example1 {
     .host = "backend.example1.com";
     .port = "8080";
 }
 backend example2 {
      .host = "backend.example2.com";
      .port = "8080";
 }
 sub vcl_recv {
    if (req.http.host == "example1.com") {
        #You will need the following line only if your backend has multiple virtual host names
        set req.http.host = "backend.example1.com";
        set req.backend = example1;
        return (lookup);
    }
    if (req.http.host == "example2.com") {
        #You will need the following line only if your backend has multiple virtual host names
        set req.http.host = "backend.example2.com";
        set req.backend = example2;
        return (lookup);
    }
 }