So what exactly is a container and how is it different from hypervisor-based virtualization? To put it simply, containers virtualize at the operating system level, whereas hypervisor-based solutions virtualize at the hardware level. While the effect is similar, the differences are important and significant, which is why I'll spend a little time exploring the differences and the resulting differences and trade-offs.

Mettre son projet en production, c’est la galère. Tellement que mille méthodes on vu le jour pour automatiser tout ça. Chef, salt, fabric, des script bash, virtualenv, git hooks, etc.

Après, il y a ceux qui utilisent des VM. Qui ont leur propres outils d’automatisation type Vagrant.

Et comme ça suffit pas, des services ce sont mis en place pour faciliter la mise en prod dans le cloud comme heroku, gondor…

Malgré ça, Max fait encore beaucoup de truc à la main parce que “ça marche jamais comme prévu”. Pas très scalable.

Dernièrement, grâce à notre cher Cortex, j’ai découvert un projet écrit en Go nommé Docker, qui propose encore une autre approche du problème.

for i in pidof python; do cat /proc/$i/cmdline | tr "\0" " " | sed "s/$/ $i\n/"; done

Useful when you have permission problem on which permission policykit handles. (network disk mounting power management ...)

Most linux distributions use some type of mechanism to gracefully stop daemons and unmount storage volumes during a reboot or shutdown. It’s most commonly done via scripts that will wait for each daemon to shut down gracefully before proceeding to the next daemon.

As we know, sometimes servers misbehave due to things put them through, and you can quickly end up in a situation where things are going badly

Leszek Godlewski, the former developer at The Farm 51 who has ported games like Painkiller Hell and Damnation and Deadfall Adventures to Linux / SteamOS, has given another presentation on porting games to Linux.

This is the web site for the Third Edition of Linux Device Drivers, by Jonathan Corbet, Alessandro Rubini, and Greg Kroah-Hartman. For the moment, only the finished PDF files are available; we do intend to make an HTML version and the DocBook source available as well.

How does a system call is handle in the linux kernel ?

How do we write a lot of data to disk really fast?

strace exemples

vm based distribution