Can anyone help me with my problem please? It's been causing me major problems. Basically I'm using Wordpress and new posts have been forcing the homepage to purge, I think because I'm using a special template within wordpress to create the homepage and I think Varnish doesn't realise it needs to purge that page<div>
<br></div><div>What I want to do is force varnish to purge my homepage when any purge requests come in to make sure it stays fresh and to be safe, but I can't get this to work:</div><div><br></div><div><div>sub vcl_recv {</div>
<div><span class="Apple-tab-span" style="white-space:pre"> </span>if (req.request == "PURGE") {</div><div> if (!client.ip ~ purge) {</div><div> error 405 "Not allowed.";</div>
<div> }</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>if (req.url == "^<a href="http://windows7news.com/$">windows7news.com/$</a>") {</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>purge(HOW DO I TELL VARNISH TO PURGE <a href="http://www.windows7news.com/magazine-homepage/">http://www.windows7news.com/magazine-homepage/</a> ????);</div>
<div><span class="Apple-tab-span" style="white-space:pre"> </span>}<span class="Apple-tab-span" style="white-space:pre"> </span></div><div><span class="Apple-tab-span" style="white-space:pre"> </span>if (req.url == "^<a href="http://windows8news.com/$">windows8news.com/$</a>") {</div>
<div><span class="Apple-tab-span" style="white-space:pre"> </span>purge(HOW DO I TELL VARNISH TO PURGE <a href="http://www.windows8news.com/magazine-homepage/">http://www.windows8news.com/magazine-homepage/</a> ???);</div>
<div><span class="Apple-tab-span" style="white-space:pre"> </span>}<span class="Apple-tab-span" style="white-space:pre"> </span></div><div><span class="Apple-tab-span" style="white-space:pre"> </span>return(lookup);</div>
<div> }<span class="Apple-tab-span" style="white-space:pre"> </span></div><div>}</div></div><div><br></div><div>Thanks for any help.</div><div><br><br><div class="gmail_quote">On Fri, Jul 8, 2011 at 11:46 AM, <span dir="ltr"><<a href="mailto:varnish-misc-request@varnish-cache.org">varnish-misc-request@varnish-cache.org</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">Send varnish-misc mailing list submissions to<br>
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<br>
Today's Topics:<br>
<br>
1. Re: Does Varnish uses ETag? (Geoff Simmons)<br>
2. Fwd: [Wordpress]homepage not purging (Everton Blair)<br>
3. Re: errno = Connection reset by peer (Tollef Fog Heen)<br>
4. Re: Varnishstat question (Tollef Fog Heen)<br>
5. Possible bug with very large headers in varnish-3.0.0<br>
revision 3bd5997 (Lee Trout)<br>
<br>
<br>
----------------------------------------------------------------------<br>
<br>
Message: 1<br>
Date: Fri, 08 Jul 2011 12:23:54 +0200<br>
From: Geoff Simmons <<a href="mailto:geoff@uplex.de">geoff@uplex.de</a>><br>
To: Kurt Kraut <<a href="mailto:listas@kurtkraut.net">listas@kurtkraut.net</a>><br>
Cc: <a href="mailto:varnish-misc@varnish-cache.org">varnish-misc@varnish-cache.org</a><br>
Subject: Re: Does Varnish uses ETag?<br>
Message-ID: <<a href="mailto:4E16DABA.2050606@uplex.de">4E16DABA.2050606@uplex.de</a>><br>
Content-Type: text/plain; charset=ISO-8859-1<br>
<br>
-----BEGIN PGP SIGNED MESSAGE-----<br>
Hash: SHA256<br>
<br>
On 7/7/11 11:14 PM, Kurt Kraut wrote:<br>
><br>
> Does Varnish used ETag to check cache freshness?<br>
<br>
Mainline Varnish doesn't, but there's an experimental branch<br>
'experimental-ims' on the source repository in which it's implemented.<br>
<br>
> - If yes, how does it behave?<br>
<br>
<a href="http://www.varnish-cache.org/trac/wiki/BackendConditionalRequests" target="_blank">http://www.varnish-cache.org/trac/wiki/BackendConditionalRequests</a><br>
<br>
As per the RFC, freshness checks against ETags are done with conditional<br>
requests to the backend using If-None-Match.<br>
<br>
> - If not, is it possible to achive through VCL?<br>
<br>
I don't think so, because standard VCL doesn't have a way to access an<br>
object in the cache that has an expired TTL, but otherwise matches the<br>
request, and hence could be refreshed.<br>
<br>
So you don't ordinarily know an ETag in VCL that could be used for the<br>
refresh, and even if you did, and got a 304 response from the backend,<br>
there's no way to tell Varnish to deliver the stale object after all.<br>
<br>
If you get a chance to try the IMS branch, please let us know how it goes.<br>
<br>
<br>
Best,<br>
Geoff<br>
- --<br>
UPLEX Systemoptimierung<br>
Schwanenwik 24<br>
22087 Hamburg<br>
<a href="http://uplex.de/" target="_blank">http://uplex.de/</a><br>
Mob: +49-176-63690917<br>
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<br>
<br>
------------------------------<br>
<br>
Message: 2<br>
Date: Fri, 8 Jul 2011 11:38:57 +0100<br>
From: Everton Blair <<a href="mailto:everton@connectedinternet.co.uk">everton@connectedinternet.co.uk</a>><br>
To: <a href="mailto:varnish-misc@varnish-cache.org">varnish-misc@varnish-cache.org</a><br>
Subject: Fwd: [Wordpress]homepage not purging<br>
Message-ID:<br>
<CAOAN0RTbMwwiYOTiZZcHA+h7HXYkDut7NLE_+c_ef=<a href="mailto:CCDxm4Xw@mail.gmail.com">CCDxm4Xw@mail.gmail.com</a>><br>
Content-Type: text/plain; charset="iso-8859-1"<br>
<br>
Hi<br>
<br>
I've just started using Varnish with Wordpress/W3TC, and all is ok, apart<br>
from my homepage not purging when an update is made e.g. a new post. I<br>
think this might be because my homepage is using a static page<br>
<a href="http://www.windows7news.com/magazine-homepage/" target="_blank">www.windows7news.com/magazine-homepage/</a> as it's homepage and is doing some<br>
magic within Wordpress to show this page when the page<br>
<a href="http://www.windows7news.com/is" target="_blank">www.windows7news.com/is</a> requested i.e. the server doesn't know that<br>
<a href="http://www.windows7news.com/magazine-homepage/" target="_blank">www.windows7news.com/magazine-homepage/</a> needs purging.<br>
<br>
I thought I'd temporariliy managed to fix this by adding:<br>
<br>
sub vcl_recv {<br>
if (req.url ~ "^/") {<br>
return(pass);<br>
}<br>
}<br>
<br>
But I only managed to turn the cache off completely. Is there anyway to<br>
tell Varnish to always purge the homepage if there's a change?<br>
<br>
Thanks in advance for any help.<br>
<br>
My full VCL is below. If anyone has any Wordpress specific changes they'd<br>
like to share then please send them my way!<br>
<br>
Regards<br>
<br>
EB<br>
<br>
-----------------------------------------------------------------------------------------------------------------------------------<br>
<br>
backend b96_30_20_4 {<br>
.host = "96.30.20.4";<br>
.port = "8080";<br>
.probe = {<br>
.url = "/";<br>
.interval = 5s;<br>
.timeout = 1 s;<br>
.window = 5;<br>
.threshold = 3;<br>
}<br>
// we include time outs so uploads don't time out<br>
.connect_timeout = 600s;<br>
.first_byte_timeout = 600s;<br>
.between_bytes_timeout = 600s;<br>
}<br>
<br>
backend b96_30_20_5 {<br>
.host = "96.30.20.5";<br>
.port = "8080";<br>
.probe = {<br>
.url = "/";<br>
.interval = 5s;<br>
.timeout = 1 s;<br>
.window = 5;<br>
.threshold = 3;<br>
}<br>
// we include time outs so uploads don't time out<br>
.connect_timeout = 600s;<br>
.first_byte_timeout = 600s;<br>
.between_bytes_timeout = 600s;<br>
}<br>
<br>
backend b96_30_20_6 {<br>
.host = "96.30.20.6";<br>
.port = "8080";<br>
.probe = {<br>
.url = "/";<br>
.interval = 5s;<br>
.timeout = 1 s;<br>
.window = 5;<br>
.threshold = 3;<br>
}<br>
// we include time outs so uploads don't time out<br>
.connect_timeout = 600s;<br>
.first_byte_timeout = 600s;<br>
.between_bytes_timeout = 600s;<br>
}<br>
<br>
backend b96_30_20_7 {<br>
.host = "96.30.20.7";<br>
.port = "8080";<br>
.probe = {<br>
.url = "/";<br>
.interval = 5s;<br>
.timeout = 1 s;<br>
.window = 5;<br>
.threshold = 3;<br>
}<br>
// we include time outs so uploads don't time out<br>
.connect_timeout = 600s;<br>
.first_byte_timeout = 600s;<br>
.between_bytes_timeout = 600s;<br>
}<br>
<br>
backend b96_30_18_15 {<br>
.host = "96.30.18.15";<br>
.port = "8080";<br>
.probe = {<br>
.url = "/";<br>
.interval = 5s;<br>
.timeout = 1 s;<br>
.window = 5;<br>
.threshold = 3;<br>
}<br>
// we include time outs so uploads don't time out<br>
.connect_timeout = 600s;<br>
.first_byte_timeout = 600s;<br>
.between_bytes_timeout = 600s;<br>
}<br>
<br>
acl a96_30_20_4 {<br>
"96.30.20.4";<br>
}<br>
acl a96_30_20_5 {<br>
"96.30.20.5";<br>
}<br>
acl a96_30_20_6 {<br>
"96.30.20.6";<br>
}<br>
acl a96_30_20_7 {<br>
"96.30.20.7";<br>
}<br>
acl a96_30_18_15 {<br>
"96.30.18.15";<br>
}<br>
<br>
acl purge {<br>
"96.30.20.4";<br>
"96.30.20.5";<br>
"96.30.20.6";<br>
"96.30.20.7";<br>
"96.30.18.15";<br>
}<br>
<br>
sub vcl_recv {<br>
if (server.ip ~ a96_30_20_4) {<br>
set req.backend = b96_30_20_4;<br>
}<br>
if (server.ip ~ a96_30_20_5) {<br>
set req.backend = b96_30_20_5;<br>
}<br>
if (server.ip ~ a96_30_20_6) {<br>
set req.backend = b96_30_20_6;<br>
}<br>
if (server.ip ~ a96_30_20_7) {<br>
set req.backend = b96_30_20_7;<br>
}<br>
if (server.ip ~ a96_30_18_15) {<br>
set req.backend = b96_30_18_15;<br>
}<br>
}<br>
<br>
sub vcl_recv {<br>
if (req.request == "PURGE") {<br>
if (!client.ip ~ purge) {<br>
error 405 "Not allowed.";<br>
}<br>
return(lookup);<br>
}<br>
if (req.url ~ "^/") {<br>
return(pass);<br>
}<br>
if (req.url ~ "^/forum/$") {<br>
return(pass);<br>
}<br>
if (req.url ~ "^/$") {<br>
unset req.http.cookie;<br>
}<br>
}<br>
sub vcl_hit {<br>
if (req.request == "PURGE") {<br>
set obj.ttl = 0s;<br>
error 200 "Purged.";<br>
}<br>
}<br>
sub vcl_miss {<br>
if (req.request == "PURGE") {<br>
error 404 "Not in cache.";<br>
}<br>
if (!(req.url ~ "wp-(login|admin)")) {<br>
unset req.http.cookie;<br>
}<br>
if (req.url ~<br>
"^/[^?]+.(jpeg|jpg|png|gif|ico|js|css|txt|gz|zip|lzma|bz2|tgz|tbz|html|htm)(\?.|)$")<br>
{<br>
unset req.http.cookie;<br>
set req.url = regsub(req.url, "\?.$", "");<br>
}<br>
if (req.url ~ "^/$") {<br>
unset req.http.cookie;<br>
}<br>
}<br>
sub vcl_fetch {<br>
if (req.url ~ "^/$") {<br>
unset beresp.http.set-cookie;<br>
}<br>
if (!(req.url ~ "wp-(login|admin)")) {<br>
unset beresp.http.set-cookie;<br>
}<br>
}<br>
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<br>
------------------------------<br>
<br>
Message: 3<br>
Date: Fri, 08 Jul 2011 12:41:30 +0200<br>
From: Tollef Fog Heen <<a href="mailto:tfheen@varnish-software.com">tfheen@varnish-software.com</a>><br>
To: <a href="mailto:google@alexus.org">google@alexus.org</a><br>
Cc: <a href="mailto:varnish-misc@varnish-cache.org">varnish-misc@varnish-cache.org</a><br>
Subject: Re: errno = Connection reset by peer<br>
Message-ID: <<a href="mailto:8739iht5ph.fsf@qurzaw.varnish-software.com">8739iht5ph.fsf@qurzaw.varnish-software.com</a>><br>
Content-Type: text/plain; charset=us-ascii<br>
<br>
]] alexus<br>
<br>
| 70 Debug c "Write error, retval = -1, len = 10212, errno =<br>
| Connection reset by peer"<br>
|<br>
| other then vcl_error(404, unknown virtual host) what that other message<br>
| really mean?<br>
<br>
That the client disconnected before we were done sending the object.<br>
<br>
--<br>
Tollef Fog Heen<br>
Varnish Software<br>
t: +47 21 98 92 64<br>
<br>
<br>
<br>
------------------------------<br>
<br>
Message: 4<br>
Date: Fri, 08 Jul 2011 12:44:45 +0200<br>
From: Tollef Fog Heen <<a href="mailto:tfheen@varnish-software.com">tfheen@varnish-software.com</a>><br>
To: Jonathan Hursey <<a href="mailto:jonathan.hursey@adrevolution.com">jonathan.hursey@adrevolution.com</a>><br>
Cc: <a href="mailto:varnish-misc@varnish-cache.org">varnish-misc@varnish-cache.org</a><br>
Subject: Re: Varnishstat question<br>
Message-ID: <<a href="mailto:87y609rqzm.fsf@qurzaw.varnish-software.com">87y609rqzm.fsf@qurzaw.varnish-software.com</a>><br>
Content-Type: text/plain; charset=us-ascii<br>
<br>
]] Jonathan Hursey<br>
<br>
Hi,<br>
<br>
| Greetings fellow varnish enthusiasts. I was wondering if anyone could help<br>
| me determine what would be considered good values for the follow fields in<br>
| varnishstat output and what these fields indicate:<br>
|<br>
| 1 0.00 0.00 N vcl total<br>
| 1 0.00 0.00 N vcl available<br>
<br>
This just tells you that you have one VCL loaded.<br>
<br>
| 7 . . N total active purges<br>
| 7 0.00 0.00 N new purges added<br>
<br>
You have 7 bans added<br>
<br>
| 6112 0.00 0.02 N objects tested<br>
<br>
And 6112 objects tested against those bans in total.<br>
<br>
Regards,<br>
--<br>
Tollef Fog Heen<br>
Varnish Software<br>
t: +47 21 98 92 64<br>
<br>
<br>
<br>
------------------------------<br>
<br>
Message: 5<br>
Date: Thu, 30 Jun 2011 20:44:26 -0400<br>
From: Lee Trout <<a href="mailto:lee@leetrout.com">lee@leetrout.com</a>><br>
To: <a href="mailto:varnish-misc@varnish-cache.org">varnish-misc@varnish-cache.org</a><br>
Subject: Possible bug with very large headers in varnish-3.0.0<br>
revision 3bd5997<br>
Message-ID: <BANLkTin7OC0zAFdedQQk3Mb42ozP=<a href="mailto:eVPwg@mail.gmail.com">eVPwg@mail.gmail.com</a>><br>
Content-Type: text/plain; charset=ISO-8859-1<br>
<br>
Hello!<br>
<br>
Please excuse the interruption, but I wanted to see if I may have<br>
stumbled upon a bug or if there is a known issue or configuration<br>
option for requests with very large header values.<br>
<br>
Using varnish-3.0.0 revision 3bd5997 when a large request comes in<br>
(cookie header ~3k characters) the header is lost. I am seeing<br>
"LostHeader c Cookie:" in the logs.<br>
<br>
This paste includes the request and results comparing varnish-3.0.0<br>
revision 3bd5997 and varnish-2.1.4 SVN 5447M<br>
<a href="http://pastebin.com/J2Qn0KGn" target="_blank">http://pastebin.com/J2Qn0KGn</a><br>
<br>
Thank you in advance for your time and suggestions.<br>
<br>
Lee<br>
--<br>
Lee Trout<br>
<a href="http://www.leetrout.com" target="_blank">http://www.leetrout.com</a><br>
<br>
<br>
<br>
------------------------------<br>
<br>
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End of varnish-misc Digest, Vol 64, Issue 13<br>
********************************************<br>
</blockquote></div><br></div>