<div dir="ltr"><div><div>Hi,<br><br>Actually i tried that link, still it is not working. it should work for a ip based virtual host, but namebased virtual host is not working.<br></div>becuase main request coming to varnish/80 and varnish should redirect the traffic to the backend server based on my round-robin director. when you resolve dns for those two hosts (<a href="http://xxx.com">xxx.com</a> and <a href="http://yyy.com">yyy.com</a>) it reuturns the same IP. that is 192.168.0.100. But there should be a way to send the host-header to apache. Not sure how it works here. But when i use different server (192,168.0.200/ <a href="http://zzz.com">zzz.com</a>) it works without any issue, it roundrobin the traffic. This is an issue with namebased virtualhost. <br>
<br></div><div>varnish recevie the traffic (<a href="http://cluster.com">cluster.com</a> is my varnish server), then it use it vcl to redirect based on my round-robin setting. but how it can send the traffic to the correct virtualhost. because it gets only the same IP address from the DNS. I managed to change the default behaviour by forcefully setting the host-header as follows to my other virtualhost(yyy..com)<br>
</div><div>set.req.host="<a href="http://yyy.com">yyy.com</a>" ;<br></div><div>then all request went to <a href="http://yyy.com">yyy.com</a> instead of <a href="http://xxx.com">xxx.com</a>. but what i want is a round-robin fashio...to send traffic. first req to <a href="http://xxx.com/">xxx.com/</a> 2nd req to <a href="http://yyy.com">yyy.com</a> and so on..<br>
</div><div><br></div>I was trying to find some resourses on the net, stackoverflow etc..but no luck yet. <br><div><br><br></div><div>Thanks again for your help <br></div><div>Cheers,<br></div><div>Tharanga<br></div></div>
<div class="gmail_extra"><br><br><div class="gmail_quote">On Fri, Aug 30, 2013 at 5:05 PM, Per Buer <span dir="ltr"><<a href="mailto:perbu@varnish-software.com" target="_blank">perbu@varnish-software.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hi Tharanga,<div><br></div><div>You seem to be a bit confused about how the directors and backends work in Varnish. Please read this:</div>
<div><br></div><div><a href="https://www.varnish-cache.org/docs/trunk/users-guide/vcl-backends.html#backends-and-virtual-hosts-in-varnish" target="_blank">https://www.varnish-cache.org/docs/trunk/users-guide/vcl-backends.html#backends-and-virtual-hosts-in-varnish</a><br>
</div><div><br></div><div>Note that the .host property of the backend has NOTHING to do with the virtual host.</div></div><div class="HOEnZb"><div class="h5"><div class="gmail_extra"><br><br><div class="gmail_quote">On Fri, Aug 30, 2013 at 2:02 AM, Tharanga Abeyseela <span dir="ltr"><<a href="mailto:tharanga.abeyseela@gmail.com" target="_blank">tharanga.abeyseela@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div><div><div><div><div><div><div><div><div><div><div><div><div><div>Hi Per,<br><br></div>Thanks for the reply. Actually my set up looks like this.<br>
<br><br></div><a href="http://cluster.com" target="_blank">cluster.com</a> - 192.168.0.200 (varnish/port 80)<br>
</div><a href="http://xxx.com" target="_blank">xxx.com</a> - 192.168.0.100 (apache,namebased vhost/8080 - backendname - website)<br></div><a href="http://yyy.com" target="_blank">yyy.com</a> - 192.168.0.100 (apache,namebased vhost/8080 -backendname - api)<br>
<br></div><div><a href="http://cluster.com" target="_blank">cluster.com</a> is the varnish server and front-end connections coming to this and rewrite to other defined back-ends (round-robin based balancing)<br></div><div>
<div><span style="text-indent:0px;letter-spacing:normal;font-variant:normal;font-style:normal;font-weight:normal;line-height:normal;border-collapse:separate;text-transform:none;font-size:medium;white-space:normal;font-family:'Times New Roman';word-spacing:0px"><pre style="white-space:pre-wrap">
backend website {
.host = "<a href="http://xxx.com" target="_blank">xxx.com</a>";
.port = "8080";
}
backend api {
.host = "<a href="http://yyy.com" target="_blank">yyy.com</a>";
.port = "8080";
}
director clust round-robin {
{ .backend = api; }
{ .backend = website; }
}
sub vcl_recv {
set req.backend = clust;
if (req.request)
{
return(pass);
}
}
</pre></span><br></div></div>when i hit the <a href="http://cluster.com" target="_blank">cluster.com</a> , it is always going to <a href="http://xxx.com" target="_blank">xxx.com</a>, but what i need to do is first request go to <a href="http://xxx.com" target="_blank">xxx.com</a> second request <a href="http://yyy.com" target="_blank">yyy.com</a> and so on...when i add another server (different host/different IP say <a href="http://192.168.0.111/zzz.com" target="_blank">192.168.0.111/zzz.com</a>, and a different backend) , it goes like this<br>
<br></div>first request - <a href="http://xxx.com" target="_blank">xxx.com</a><br></div>second request - <a href="http://xxxx.com" target="_blank">xxxx.com</a><br></div>third request - <a href="http://zzz.com" target="_blank">zzz.com</a><br>
<br><br></div>but i can change the default behavior by setting up set req.host = <a href="http://yyy.com" target="_blank">yyy.com</a> and then it will goes to <br>
</div>first request - <a href="http://yyy.com" target="_blank">yyy.com</a><br>second request - <a href="http://yyy.com" target="_blank">yyy.com</a><br></div>third request - <a href="http://zzz.com" target="_blank">zzz.com</a><br>
<br></div>this is something to do with the host-header forwarding to the correct back-end. how should i add that functionality to the vcl_recv ?<br>
</div>appreciate your help on this, this is working perfectly with other servers (different servers, not with namebased vhosts)<br><br></div>cheers,<br></div>Tharanga <br><div><div><div><div><div><br> <br><div><div><div>
<div><div><div><div><br><br><br><br><br><div><div><div><div><br><br><br><br><br><br></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div><div><div>
<div class="gmail_extra"><br><br><div class="gmail_quote">
On Thu, Aug 29, 2013 at 11:58 PM, Per Buer <span dir="ltr"><<a href="mailto:perbu@varnish-software.com" target="_blank">perbu@varnish-software.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">Hi mate,<br><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Aug 29, 2013 at 3:17 PM, Tharanga Abeyseela <span dir="ltr"><<a href="mailto:tharanga.abeyseela@gmail.com" target="_blank">tharanga.abeyseela@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">(..)<div><br>But how should i send host-headers to varnish to redirect to the correct server, This is always going to <a href="http://xxx.com" target="_blank">xxx.com</a>.<br>
</div></div></blockquote><div><br></div><div>You don't. :-)</div><div><br></div><div>You need to dispatch the request to the right backend in vcl_recv and have the backend handle that host. You could start rewriting the host in vcl_recv, but I would advise against it. </div>
<div><br></div><div>So, if you have two vhosts handled by "website" you just set that as the backend in vcl_recv.</div></div><span><font color="#888888"><div><br></div>-- <br><div dir="ltr"><div style="color:rgb(34,34,34);font-size:12.727272033691406px;font-family:arial,sans-serif;margin:5px 15px 0px 0px;padding-bottom:5px">
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<td style="font-family:arial,sans-serif;margin:0px"><b style="font-size:14px;color:rgb(34,34,34)">Per Buer</b><br>CTO | Varnish Software AS<br>Phone: <a href="tel:%2B47%20958%2039%20117" value="+4795839117" target="_blank">+47 958 39 117</a> | Skype: per.buer<br>
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<table style="text-align:start;font-size:12px;line-height:1.5em;font-family:'Helvetica Neue',Arial,sans-serif;color:rgb(102,102,102);width:550px;border-top-width:1px;border-top-style:solid;border-top-color:rgb(238,238,238);border-bottom-width:1px;border-bottom-style:solid;border-bottom-color:rgb(238,238,238);margin-top:20px;padding-top:5px;padding-bottom:5px" border="0" cellpadding="0" cellspacing="0">
<tbody><tr><td style="font-family:arial,sans-serif;margin:0px" width="100"><a href="http://www.varnish-software.com/" style="color:rgb(17,85,204)" target="_blank"><img src="http://www.varnish-software.com/static/media/logo-email.png" style="float:left;margin-left:10px"></a></td>
<td style="font-family:arial,sans-serif;margin:0px"><b style="font-size:14px;color:rgb(34,34,34)">Per Buer</b><br>CTO | Varnish Software AS<br>Phone: <a href="tel:%2B47%20958%2039%20117" value="+4795839117" target="_blank">+47 958 39 117</a> | Skype: per.buer<br>
<span style="font-weight:bold">We Make Websites Fly!<br>
<br></span><span style="font-family:'Helvetica Neue',Arial,sans-serif;font-size:14px;font-weight:bold">Winner of the Red Herring Top 100 Europe Award 2013<br></span><p style="margin:0px;line-height:normal;font-family:Helvetica">
<img src="https://www.varnish-software.com/sites/default/files/redherring_2013_winner_sml.jpg"></p><span style="font-weight:bold"><br></span></td></tr></tbody></table><div></div></div><div style="clear:both;color:rgb(34,34,34);font-size:12.727272033691406px;font-family:arial,sans-serif;margin:15px 0px">
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