Blog calendar

RSS feed from Michal Frackowiak's blog

subscribe to the RSS feed

— or —

get my blog posts via email

Arotaritei VladArotaritei Vlad
TRT- Vipul SharmaTRT- Vipul Sharma
Matt GentileMatt Gentile
Sven StettnerSven Stettner
Brian PasBrian Pas
Joshua DarbyJoshua Darby
lil g easylil g easy
Mr ShaggyMr Shaggy
Chen XXChen XX

... and more

Watch: site | category | page

Blog tags

View my profile on LinekdIn




Piotr Gabryjeluk's blog (Gabrys on Wikidot)
Lukasz Tarka's blog (Squark on Wikidot)

Recent posts by my friends

{"module":"feed\/FeedModule","params":{"blog_tag":"wikidot","src":"http:\/\/\/feed\/pages\/category\/blog\/;http:\/\/\/feed\/pages\/category\/dev\/t\/Piotr+Gabryjeluk+dev+blog","limit":"10","module_body":"[[div style=\"font-size: 87%; margin: -0.7em 0;\"]]\n%%linked_title%%\n[[\/div]]"}}

Me in other networks:

facebook,,, Flickr, Flaker

Welcome to my blog — place for ideas, comments, interesting hacks and boring personal stuff. Enjoy!

HAProxy and Chef - dynamic backend server list

20 Nov 2014 10:02

After the recent load balancer upgrade at Wikidot people asked me about the magic behind automatic HAProxy configuration — namely, how do we solve dynamical addition and removal of backend servers. It's not that complex, we use Chef.

Below I will tell you how we do it.


  1. We have a working Chef server.
  2. All nodes run Ubuntu, but it's not really important.
  3. All nodes run chef-client periodically (in our case, every 3 minutes).
  4. All web nodes have role web.

As a result will develop a minimal haproxy cookbook to be run on the HAProxy node that:

  1. Will set up HAproxy service.
  2. Will discover and connect to all backend servers.


Tags: chef haproxy wikidot

Comments: 20

Wikidot Gadgets

24 Mar 2009 11:56

Honestly I do not care that much about widgets, gadgets, being eye-candy… But sometimes we find cool things that we can put on our wikis and they can give some little joy.


Tags: fun gadgets useless wikidot

Comments: 6

Wikidot on Cloud - part 2

09 Mar 2009 10:38

So as you have probably already read on my previous blog post, we are thinking about re-designing the Wikidot infrastructure to make it more failure-proof, elastic and more efficient. One of the concepts have is to use one of the "cloud solutions", e.g. Amazon AWS (i.e. EC2 + S3).


Tags: aws cloud testtag wikidot

Comments: 5

Wikidot on Cloud

06 Mar 2009 09:48

Everytime we have an emergency situation at Wikidot (as yesterday with our webserver) we try to stop and think how well protected we are from different kind of hardware and software failures, network problems and even larger disasters (like our datacenter being destroyed). Also yesterday we stepped down from our daily tasks and looked at the situation.


Tags: cloud virtualization wikidot

Comments: 0

Working on email notifications

03 Feb 2009 09:12

As we hinted in several places, including the discussion at Pro tracker, we are currently working on email notifications, so that you can follow (watch) activity at Wikidot by receiving emails directly into your Inbox.

The feature is really great (we have it enabled for a few testing accounts) and allows you to be instantly notified about page edits, forum discussions, page comments etc. for pages, categories or whole sites.


Tags: activity email notifications rss wikidot

Comments: 7

Wikidot Not Available

02 Feb 2009 23:13

Today in the very morning we had a small problem with one of our Wikidot servers, which manifested in "service unavailable" message between 2 AM and 5 AM UTC. The problem was easy to fix, but unfortunately because it was the middle of the night for us, we could not respond quickly enough and SMSes from our monitoring systems did not wake us up.


Tags: outage wikidot

Comments: 1

More pages than Wikipedia

12 Jan 2009 09:49

Yesterday I noticed a significant milestone of compared to

Wikidot has more pages than the english version of Wikipedia!


Tags: wikidot wikipedia

Comments: 2

Pro accounts and a few ideas

18 Dec 2008 11:47


I was too busy and then too tired to write a post yesterday — but yes, we did manage to introduce Pro accounts at yesterday. And even more — have already had a few sales. Also we have received very positive feedback from our Users, Friends and Customers.


Tags: ideas pro wikidot

Comments: 5

Pro accounts tomorrow - will shave my beard

16 Dec 2008 21:35

Tomorrow is the big day for and our Team — we will officially make Pro accounts available to our users.

So far Wikidot has been free and our revenue came mostly from online advertising. But obviously there are a few problems associated with the model of "provide free service, monetize the traffic":


Tags: free pro wikidot

Comments: 1

Use the new Wikidot front theme on your Wiki in 5 easy steps

27 Nov 2008 08:55

Yesterday our team introduced a new design for our front page at We are getting many positive feedback about it. Thanks!

Many people were also asking us if it is possible to use the new theme on their own pages. Well, we are going to make a regular theme based on the new design, but if you are impatient and want to live on the bleeding-edge (like me) here is how I did it. No CSS knowledge is required and the result is instantaneous with just a few steps to complete.


The general idea is to create a new custom theme for Wiki and in the CSS definition import the CSS file from the front-page design. You will also need to add a few modifications, just copy&paste.


Tags: design howto tip wikidot

Comments: 2

Moving static content to CloudFront

18 Nov 2008 10:59

For the last couple of weeks we are thinking of ways to make faster, more responsive and more scalable. Personally I am fascinated with Amazon's web services, particularly :

I can see those services as a natural environment for future Wikidot hosting, but this is not exactly what I wanted to write about.


Today Amazon has announced another service, CloudFront — a damn easy to use Content Delivery Network.


Tags: amazon aws cdn cf cloudfront wikidot

Comments: 6

New Wikidot Theme

30 Oct 2008 20:47


Wikidot insider sneak preview: Wikidot awaits a major graphical redesign. What we are currently working on is a totally new front page for — cleaner, more organized, more friendly… Just better.

Lukasz has been working on it for a while, but this picture was taken when he just started 2 weeks ago, this is why he is smiling — he looks much worse now after 24th iteration of the theme and generating another set of buttons ;-)


Tags: design insider wikidot

Comments: 4

Is this O.K. to attach ads to user-generated content?

24 Sep 2008 15:34

It's about free web services that earn money from ads placed on user-generated content pages. This is exactly how could earn money and how and thousands of others are generating their revenue. Some people have nothing against it, some would never use a service with such ads.


Tags: ads marketing monetization wikidot

Comments: 5 in Poznań - impressions

21 Sep 2008 21:42

As many of you already know, Wikidot (the company) is based in Poland, Torun. And I really like going to various meetings, conferences and workshops organized locally. In fact, there are plenty of meetings related to "Web 2.0" and a lot has changed in the last 2 years here in Poland in the local Internet.

Anyway, on Saturday we decided to visit meeting in Poznań. Short summary? It was awesome. Clearly confirmed that the state of Internet in Poland more or less follows global trends.


Tags: barcamp meetings poland web2.0 wikidot

Comments: 2