Puppet errors - explained
Wonderful though Puppet is, it can be frustrating when it spits out an error message which makes no sense.We could keep all this useful information to ourselves, however we are a caring, sharing...
View ArticleKSM - Kernel Samepage Merging and KVM
Here at Bitcube we use KVM as our preferred virtualisation platform. It has the best Linux support and is the standard for all Linux distributions. Whilst it still shows a bit of immaturity at times,...
View ArticleDevops - not a solution for everyone
A relatively new term "Devops" is starting to become more widespread. As with most new terms it means different things to different people (a bit like "the cloud" or "grid computing" does even...
View ArticleUpgrading to Ubuntu Lucid
Sadly this isn't to be a blog of joy, more a blog of "must do better".Today we upgraded one of our servers from Ubuntu Hardy (8.04 LTS) to Lucid (10.04 LTS) and we hit a few issues.First of all, we...
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Writing Nagios modules
Britain is enjoying rather nice weather at the moment. One of our consultants has a CurrentCost meter and developed a plugin for Nagios using the excellent Nagios::Plugin Perl library. This allowed him...
View ArticlePuppet dashboard - v1.0.1 install
It's been exactly six months since we wrote our first Puppet dashboard article and it seems that an update is due.In this first article, we'll cover installing puppet dashboard on a Debian Lenny server...
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Puppet dashboard - six months on
In this second article we'll be taking a look at the dashboard itself. Six months ago we were distinctly underwhelmed by the dashboard - it was more style than substance.More recently we tried it and...
View ArticleLDAP org chart
For centralised authentication and authorisation, LDAP is the de-facto standard. Whether in its pure form on Unix or in Active Directory guise on Windows, everyone uses it.What many people don't...
View ArticleWhat a difference an SSD makes
OverviewIn this blog post we'll be covering setting up an SSD for Linux and then sharing the results of some performance testing.What is an SSD?SSDs are now well established as high performance...
View ArticleBooting with an SSD
Following on from our earlier article about upgrading from a traditional hard disk to an SSD, we tested that old metric, boot time.We used the excellent bootchart tool to gather these statistics. It's...
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