Blog

Mounting partitions stored in a logical volume (or a disk image)

With the increased use of virtualization has come the increased use of disk images (.iso, .vmdl, .qcow2, .vdi, etc) and LVM’s logical volumes (LV), as dedicated storage for Virtual Machines (VM). Frequently, when setting up a VM, several partitions are created within these disk images. So, you end up with a machine (the virtualization host), […] Read more

Why we use Cfengine: file editing

Here at Normation, we use Cfengine 3 extensively for configuration management across Linux and Windows servers. A question we get often is why Cfengine? I’d like to focus this post on file editing. Since Configuration Management has a lot to do with configuration files, file editing (either from a template, or just setting parameters) is […] Read more

Cfengine tip: Keeping cf-execd alive (whatever happens)

As good as your configuration management tool may be, it can only do it’s job if it’s running. Some tips on making sure this is the case, whatever happens. Why just cf-execd? With Cfengine, the “heavy lifting” is done by cf-agent, which is normally run on a regular interval by cf-execd (a daemon that runs […] Read more

Why we use Cfengine: memory footprint

Here at Normation, we use Cfengine 3 extensively for configuration management across Linux and Windows servers. A question we get often is why Cfengine? This is phrased either as What is so great about Cfengine? or What is the difference between Cfengine and Puppet or Chef? (as a reminder of how these 3 projects are […] Read more

FOSDEM: Configuration Management wishlist

We were at FOSDEM in Brussels last weekend (OK, like every year, and like thousand of others – yes it’s that good an event!). Alongside a huge number of interesting talks, events and people, of particular interest to us was the Configuration Management DevRoom, organized by James and Nigel from Puppet Labs. It hosted brilliant […] Read more

Installation de Cfengine depuis les sources

Cfengine est un logiciel de gestion de configuration, en constante évolution (surtout depuis que la version 3 est sortie l’an dernier). Cfengine AS, la société commerciale soutenant le produit, fournit depuis quelques mois des versions de CFengine directement packagées pour les différentes distributions ici (nécessite un login/mot de passe, création du compte gratuite). Néanmoins, on […] Read more

Set up Eclipse workspace in RAM

In the last article, we covered basic optimization paths for Eclipse. But it remains that Eclipse spend an awful amount of time performing I/O, reading and writing big amounts of (often small) files – and you can’t imagine how numerous theses files are. Of course, there is all the class resources file you are editing […] Read more

Juil, 27, 2010

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Java LDAP SDK for SyncRepl replication showcase

Java LDAP reborn As you may know, I’m rather fond of the LDAP protocol and its open source server and client implementations. But I’m also found of the JVM, and in a not so far past, the only maintained Java LDAP SDK was Sun’s LDAP-JNDI, which is at best a call for masochists to make […] Read more

Cfengine 3 presentation @ RMLL 2010

From the 6 to 11 July 2010, the 11th RMLL are hosted in Bordeaux, a great meeting for anyone interested with Free Software and their uses. Among the numerous very interesting presentations and round tables, I gave a presentation about the advantages of configuration management, and how Cfengine 3 works to help you deal with […] Read more

Scala dreaded underscore @ PSUG

On the evening of June 30th 2010, the Paris Scala User Group organized its second event. This time, there were two presentations: in the first one, Alexis Agahi, our kind user group leader, made a feedback after one year of scala experience. It’s available here. the second one was given by your servitor, and deals […] Read more

Juil, 01, 2010

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Conférences : Loadays et RMLL

Normation a eu la chance de participer à la première édition des Loadays, ou Linux Open Administration Days. Retour rapide sur cet évènement, et rendez-vous à la prochaine grande conférence du libre : les RMLL à Bordeaux du 6 au 11 juillet 2010. Le weekend du 10-11 avril 2010, une école de la ville d’Anvers […] Read more

Managing configuration with Cfengine 3: concepts & theories

In December 2009, Mark Burgess, the author of Cfengine, was in France. This was a great opportunity to arrange a talk with members of the French Cfengine community. Cfengine[0] is a policy-based configuration management system written by Mark Burgess at Oslo University College. Its primary function is to provide automated configuration and maintenance of computers, […] Read more

Optimizing Eclipse performances

Especially for Scala projects We love Eclipse. I mean, it’s clearly the best IDE around[1]. And we love to hate it. It is bloated. To make it useful, you have to cherry pick among hundreds of modules, and figure out how to make them work together. And it’s slow. OK, at the beginning, everything is […] Read more

Mai, 24, 2010

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Hello world!

Bienvenue sur le blog de Normation Basés à Paris, nous éditons des solutions logicielles pour l’exploitation et le management des infrastructures informatiques, et fournissons de l’expertise dans les domaines de la gestion de configuration et des identités. Ce blog contiendra des articles sur des sujets qui nous importent : Orientés technique : gestion de configuration, Cfengine, […] Read more

Mai, 17, 2010

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