Varnish and mod_deflate support

[georgi.int at gmail.com]

Thank you about your reply.

1. I understand, but the process for migrating is not so fast, because 
of compile all from source including all vmods, building new rpms and 
distributing them on many servers. Also, I am not sure that this is the 
only one solution :)

2. The pipe was only for the test to see if only on the backends will 
work. Now it's not piped, but the cache is stopped (it's all the time 
stopped, because I use it only as a firewall for apache).

3. I wouild like to ask you to see this peace of log, because I can't 
find anything anoying in it, but I am completely new to varnish so it's 
possible I miss something. I see that here it's accepting encoding gzip:

   32 TxHeader     b Host: mysite.com
    32 TxHeader     b User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux i686; 
rv:42.0) Gecko/20100101 Firefox/42.0
    32 TxHeader     b Accept: 
text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
    32 TxHeader     b Accept-Language: en-US,en;q=0.5
    32 TxHeader     b X-Country-Code: BG
    32 TxHeader     b X-Forwarded-For: IP, IP
    32 TxHeader     b X-Varnish: 1218787819
    32 TxHeader     b Accept-Encoding: gzip
    32 RxProtocol   b HTTP/1.1
    32 RxStatus     b 404
    32 RxResponse   b Not Found
    32 RxHeader     b Date: Tue, 01 Dec 2015 07:40:09 GMT
    32 RxHeader     b Server: Apache/2.2.27 (Unix) /5.0 mod_ssl/2.2.27 
OpenSSL/1.0.1e-fips mod_bwlimited/1.4 mod_fastcgi/2.4.6
    32 RxHeader     b Vary: Accept-Encoding
    32 RxHeader     b Content-Encoding: gzip
    32 RxHeader     b Content-Length: 248
    32 RxHeader     b Connection: close
    32 RxHeader     b Content-Type: text/html; charset=iso-8859-1
    32 Fetch_Body   b 4(length) cls 0 mklen 1
    32 Length       b 248
    32 BackendClose b default
    30 SessionOpen  c IP 59645  IP:80
    30 ReqStart     c  IP 59645 1218787819
    30 RxRequest    c GET
    30 RxURL        c /favicon.ico
    30 RxProtocol   c HTTP/1.1


I read that it's possible to turn off completely mod_deflate from apache 
and use varnish built in compression, but at this time this is not 
solution for our company so I am trying to find another.

Best regards,
Georgi

On 12/01/2015 02:35 AM, Jason Price wrote:
> First off, 3.0.7 is EOL.  Move to 4.x as soon as you can
>
> Second, I'd leave the entire stanza out of VCL.  The varnish defaults 
> handle compression without issue in most cases.  If the backend serves 
> compressed data, it'll be cached as compressed, and served as compressed.
>
> Third, once you 'pipe' a request, varnish does nothing other than 
> packet forwarding.  It can't cache, it can't balance requests across 
> backends, nothing.
>
> If the above doesn't resolve your problem, try to capture a request 
> Client and Backend side transaction in varnishlog. That will help 
> diagnose what the real problem is.
>
> -Jason
>
> On Mon, Nov 30, 2015 at 11:42 AM, georgi.int at gmail.com 
> <mailto:georgi.int at gmail.com> <georgi.int at gmail.com 
> <mailto:georgi.int at gmail.com>> wrote:
>
>     Hello,
>     I have been using varnish 3.7 only as a proxy server for apache
>     and have a following lines in default.vcl which should handle the
>     encodings:
>
>     if (req.http.Accept-Encoding) {
>         if (req.http.Accept-Encoding ~ "gzip") {
>           # If the browser supports it, we'll use gzip.
>           #set req.http.Accept-Encoding = "gzip";
>           unset req.http.Accept-Encoding;
>         }
>         else if (req.http.Accept-Encoding ~ "deflate") {
>           # Next, try deflate if it is supported.
>           set req.http.Accept-Encoding = "deflate";
>         }
>         else {
>           # Unknown algorithm. Remove it and send unencoded.
>           unset req.http.Accept-Encoding;
>         }
>     }
>
>     Although, customers which have mod_deflate rules in .htaccess file
>     experience the problem that their sites are not compressed. If I
>     pipe the site to apache site is compressed. SO, my question is
>     what is the problem with the deflate and my varnish configuration?
>     Is it required to add something other to varnish to work the
>     deflate? I tried a couple of things which I found in the net, but
>     nothing worked.
>
>     Thank you in advance for your answers!
>
>     Best regards,
>     Georgi
>
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>

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