Language Selection

English French German Italian Portuguese Spanish

New Content/Layout OK?

Yes
95% (21 votes)
No
5% (1 vote)
Total votes: 22

Varnish Proxy

Silly me, a poll would not work on the new server. I forgot that with the Varnish cache proxy at the front almost all visitors arrive from the same IP address (the proxy), which means that Drupal would allocate just one vote to all (except registered and presently logged in users). With Drupal upgrade we can perhaps find polling software that overcomes this.

rpaf

You must use mod_rpaf to fix this problem that Varnish introduces.
See eg https://www.varnish-cache.org/lists/pipermail/varnish-misc/2008-September/016470.html
mod_rpaf for EL6 64bit here: http://centos.alt.ru/repository/centos/6/x86_64/mod_rpaf-0.6-2.el6.x86_64.rpm

Proxy

Thank, we will look into it. Currently, a lot of stuff other than the poll (e.g. views being counted) are not compatible with Varnish and it makes it look as though not many people visit and can participate in the site.

For sheer stats you could use

For sheer stats you could use an external (i.e. not cached by varnish) service, such as Google Analytics or run your own Piwik.

Piwik

Google Analytics is spyware, but Piwik would be a possibility (Stallman recently told me that it's good). Can it be installed on a cache proxy? I'd have to gain access to it first. Either way, this would not facilitate per-post page request count. Susan had it set up with a module, but it's no longer working correctly. In turn, rating/sorting posts by popularity is no longer possible, and that's the real downside (the front page can no longer list popular items for today).

The problem is not just that IP addresses are not unique. Some requests are never seen by the CMS and Apache.

For the non-unique addresses

For the non-unique addresses look at mod_rpaf, it was made for this situations.
Is this drupal6 or 7? With 6 varnish integration sucks from what I've seen.

See also
https://drupal.org/project/varnish
https://fourkitchens.atlassian.net/wiki/display/TECH/Configure+Varnish+3+for+Drupal+7

Agreed on Google Analytics. You can just install Piwik on the same host and tell Varnish either not to cache it or you can just set its virtualhost on a port other than 80 so it bypasses Varnish completely.

Varnish

Thanks for the pointers.

Yes, it's Drupal 6 and there are other issues that I am beginning to see, such as lack of updates from the RSS feeds around the page (I am currently investigating this, maybe it's related to a cron job or module config although I very much doubt the latter as I haven't changed configs).

Non-unique addresses could be bypassed as an issue even by writing random IP addresses, but that would enable easy poll rigging. I guess it's not essential for operation of the site, but it's a nice-to-have...

From Drupal.org: "This module provides integration between your Drupal site and the Varnish HTTP Accelerator, an advanced and very fast reverse-proxy system. Basically, Varnish handles serving static files and anonymous page-views for your site much faster and at higher volumes than Apache, in the neighborhood of 3000 requests per second."

I have had such issues with Varnish on top of WordPress and MediaWiki (pages served improperly from cache) and it all makes me wonder if removing Varnish altogether is the best way to proceed.

As for Piwik, I have never tried it before, so I will look into it.

I would keep Varnish on for

I would keep Varnish on for static files (css, js, jpeg etc) and to clean up HTTP traffic (Varnish will not forward incomplete or malformed HTTP requests to the backend, it should also be the front line against synfloods etc).

Here's a sample of what I use (test it first, I'm just beginning with Varnish myself)

director default dns {
.list = {
.port = "8080";
.connect_timeout = 5s;
.first_byte_timeout = 600s;
.between_bytes_timeout = 600s;
.max_connections = 10000;
"172.16.1.53"/32;
}
}
sub vcl_recv {
if (req.url ~ "\.(png|gif|jpg|swf|css|js)$") {
return(lookup);
}
}
sub vcl_fetch {
if (req.url ~ "\.(png|gif|jpg|swf|css|js)$") {
unset beresp.http.set-cookie;
}
if (req.restarts == 0) {
if (req.http.x-forwarded-for) {
set req.http.X-Forwarded-For =
req.http.X-Forwarded-For + ", " + client.ip;
} else {
set req.http.X-Forwarded-For = client.ip;
}
}
}

Then install mod_rpaf and make sure your Apache is listening on port 8080 and add this to /etc/httpd/conf.d/rpaf.conf:
LoadModule rpaf_module modules/mod_rpaf-2.0.so

RPAFenable On
RPAFproxy_ips 127.0.0.1 IPs_OF_THE_SERVER
RPAFsethostname On
RPAFheader X-Forwarded-For

PS: looks like drupal is messing with my comments, here's a text version http://fpaste.org/74672/raw/

Thanks

Thanks, I will look at it and into it in the weekend.

RSS feeds

The Piwik demo looks impressive, I have just given them a word of endorsement.

I am still trying to resolve some other issues we've identified.

I think I found the source of the issue above (RSS feeds). It seems like any external site access is denied by default, which helps explain why RSS feeds cannot be retrieved by the Drupal part of the site:


[root@tuxmachines ~]# wget lxer.com
--2014-02-05 04:34:37--  http://lxer.com/
Resolving lxer.com... 108.166.170.174
Connecting to lxer.com|108.166.170.174|:80... failed: Connection refused.
[root@tuxmachines ~]# wget linuxtoday.com
--2014-02-05 04:34:54--  http://linuxtoday.com/
Resolving linuxtoday.com... 70.42.23.121
Connecting to linuxtoday.com|70.42.23.121|:80... failed: Connection refused.

Looks like a firewall issue

Looks like a firewall issue at the first glance.

Firewall

Nux wrote:

Looks like a firewall issue at the first glance.

Yes, it was a simply issue to tackle. It works now.

Pageview count and polls

I'll have a look and see if configuration can solve not just the polling issue but also pageview count. The site of this module is down and it seems like it may require configuration on the cache server too.

More in Tux Machines

10 Best Linux Business Apps

There’s no question that the Linux desktop can be a highly effective workhorse. Note, as proof of this, the greater coverage in the media of the best business apps for Linux. Keep reading for the best Linux business apps – and please add your own favorite in the Comments section below. Read more

Android Leftovers

FreeBSD-Based TrueOS 17.12 Released

The FreeBSD-based operating system TrueOS that's formerly known as PC-BSD has put out their last stable update of 2017. TrueOS 17.12 is now available as the latest six-month stable update for this desktop-focused FreeBSD distribution that also offers a server flavor. TrueOS continues using OpenRC as its init system and this cycle they have continued improving their Qt5-based Lumina desktop environment, the Bhyve hypervisor is now supported in the TrueOS server install, improved removable device support, and more. Read more

An introduction to Joplin, an open source Evernote alternative

Joplin is an open source cross-platform note-taking and to-do application. It can handle a large number of notes, organized into notebooks, and can synchronize them across multiple devices. The notes can be edited in Markdown, either from within the app or with your own text editor, and each application has an option to render Markdown with formatting, images, URLs, and more. Any number of files, such as images and PDFs, can be attached to a note, and notes can also be tagged. I started developing Joplin when Evernote changed its pricing model and because I wanted my 4,000+ notes to be stored in a more open format, free of any proprietary solution. To that end, I have developed three Joplin applications, all under the MIT License: for desktop (Windows, MacOS, and Linux), for mobile (Android and iOS), and for the terminal (Windows, MacOS, and Linux). All the applications have similar user interfaces and can synchronize with each other. They are based on open standards and technologies including SQLite and JavaScript for the backend, and Terminal Kit (Node.js), Electron, and React Native for the three front ends. Read more