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Bugs, Featured, Headline, Ruby, vmware »

[21 Feb 2013 | 2 Comments | ]

I finished my Chef Recipes and obviously next step is to create and bootstrap VMware virtual machines directly from scripts. I started to test 2 knife plugins knife-esx and knife-vsphere. Quickly I dropped knife-esx solution, because was based on ssh access to the ESX host and we, “the common people”, don’t have rights on that machine. A little bit about my ESX environment: Is an environment with multiple datacenters, multiple clusters, hundreds of virtual machines. On this environment I don’t have full access and requesting one, it takes weeks/months …

Featured, How-to, Ruby »

[18 Feb 2013 | No Comment | ]

In the following article I will try to show you, the power of Ruby in three short hash/array examples.
First I will show you how to sort a key value array by value. Second I will modify the keys name and create another array with this keys (which are already sorted by values).
Third we will sort an array based on the other array keys.

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Featured, Glassfish, Java, Security »

[5 Jan 2012 | No Comment | ]

This is an old bug, first discovered in 2003, but now was applied to the hash table functions from the new programming languages. The main idea behind this bug is to create hashes which collide, because collision will eat a lot more cpu cycles on your server. For a post of 2 MB is resulting in a 44 minutes of CPU time which will results in a DOS.

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Apache, Debian, Featured, Headline, How-to, Php, Security »

[6 Jun 2011 | 6 Comments | ]

It’s been a while since I configured the latest Dynamic Mass Virtual Hosting Server. Last time I used mod_vhost_alias to create a dynamic virtual hosting and it worked without any problem for what we need in that time. Then we didn’t care about the ftp and virtual users, the sites was updated from web pages and security was pretty much handled by upload application who managed the virtual hosting. Now, the problem is a little bit changed: We need a secure sever which should support ftp virtual users with quota …

Clustering, Featured, Glassfish, Headline, How-to, Java, Linux, Shell »

[4 May 2011 | 3 Comments | ]

Finlay is here. For me, Glassfish 3.1, was one of most awaited piece of software, for all it’s new features and clustering support. Glassfish 3.1 slightly changed the way to install cluster, in a much better and integrated way. This version come with a lot of new functionality, but also with improved parts related to Glassfish 2.1.

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