Last week, I’ve assisted to a webinar organized by Puppet Labs. The talk was about PackStack which is a solution to deploy OpenStack in a production environment.
How does PackStack works ? Some of you may tell me that DevStack do the same thing. But I warn once again about DevStack which is absolutely not build for production usages ! PackStack is a bundle of current modules for OpenStack available on Puppet Forge.
Vagrant is a fast solution build on top of VirtualBox. I already talked about it in a previous post.
The thing is, you could do really more with Vagrant by adding Puppet manifests or Chef recipes in your Vagrant configuration file. For those who don’t often use one of those 2 softwares, it quickly could transform into a nightmare when they want to deploy softwares in addition of the OS.
Git : have you ever tried to play with it ? For several years I’m working with that fantastic tool. Anyway the biggest problem is : if you don’t work day to day with Git, you need a memento or something similar (like my wiki 😉).
Also, if you use it for your personal usage, you’ll be lost when you will work with complex workflows. As I’m not a developer, I use Git to manage my etc configuration, my puppet manifests, my custom scripts…so many basic usage that really help me to win time as a sysadmin.
WeeChat is a fast, light and extensible chat client. It runs on many platforms (including Linux, BSD and Mac OS). I’m using it over a year and really love that client.
WeeChat is:
modular: a lightweight core with plugins around multi-protocols: IRC and Jabber (other soon) extensible: C plugins and scripts (Perl, Python, Ruby, Lua, Tcl and Scheme) free software: released under GPLv3 license fully documented: user’s guide, API, FAQ,.
When you manage outgoing emails through SMTP, you may sometimes need to test if a service is able to send correctly emails and itself check that there were no issue during sending. You can create a black hole for a specific domain and Postfix will answer from the same manner as if it is ok. It also permit to test Postfix sending capacities on a server.
To get more informations on this, follow that link.
In a sad scenario where an application is fully consuming CPU to limit it. To do so, you will need a magic command called Cpulimit that will help you to limit a PID to a desired percentage usage of your CPU.
I’ve wrote a little documentation on cpulimit.
Cela faisait un bail que j’attendais un soft de ce type, à tel point que je pensais en développer un au cas ou je ne trouve pas mon bonheur. Et par hasard, je suis tombé sur Copy-Queue qui fait exactement ce que je veux. A savoir, en ligne de commande, je peux faire des cp et des mv avec une gestion de file d’attente.
J’ai fais un petit article pour sa mise en place.
