Use cases for Docker driven development.

So the trend these days is to talk about container all the things that usually involve Docker, it even has a now its own verb, people are now using the word ‘containerizing’ to describe packaging their application with Docker. A lot of the things happening lately in the Docker world is to solve how to get those containers in real production environments, there is people working on taking the ‘containerization’ philosophy to storage, networking or getting orchestration right...

November 10, 2014

Dox a tool that run python (or others) tests in a docker container

Sometime there is some ideas that are just obvious that they are good ideas. When Montystarted to mentionon the OpenStack development mailing list about a tool he was hacking on allowing to integrate docker containers to do the testing it was obvious it was those ideas that everybody was thinking about that it would be awesome if it was implemented and started to get used. The idea of dox is like the name imply is to slightly behave like the toxtool but instead of running virtualenvs you are using docker containers....

September 8, 2014

How do I manage my copyright headers in Emacs

My day to day being work or personal is to create OpenSource code. As an habit I have taken lately I am adding licenses to all new files I am creating. I have historically used the `auto-insert-mode with a default template. For example for my newly created python files I would have this for configration : ;AutoInsert (auto-insert-mode 't) (setq auto-insert-alist '((python-mode . "python.py"))) and in my `auto-insert-directorydirectory there would be a python....

March 14, 2014

The life of an OpenStack contributor checking for Jenkins failures

We have all been there, we are committing a two character change in a project and send our review all happy and dandy with the review tool full of hope that our change is rock solid : You now that a two character change cannot fail. This is a tiny change in some arcane part of the Swift code that can never get passed by the tests launched in Jenkins and should just be a straightforward commit....

December 24, 2013

How to access Rackspace Cloud with latest novaclient/swiftclient

I spent too much time trying to figure out how to use the latest swiftclient/novaclient with Rackspace Cloud that I thought I would have to document it somewhere to avoid the pain for others. Assuming you don’t want to use pyrax and no OS_AUTH_SYSTEM plugin but just pure OpenStack python-novaclient/swiftclient on Rackspace cloud then you just need to export those variables in your shell : so now the region is ORD here (Chicago) but this can be SYD/IAD/DFW or whatever new datacenter/region from Rackspace....

September 27, 2013

Quick Swift Tip: How to remove a header with Curl

curl is obviously an extremely popular way to experiment a REST API. Unfortunately one of its shortcoming is not able to remove a custom header but just to modify or add it. In swift if you prefix your Meta header with X-remove it would then just do that and remove the header. For example when I wanted to remove the account quota header from an account with a reseller admin token I had just to do that :...

July 17, 2013

How to launch the Swift functional test suite with Keystone

It is easy to launch the swift functional tests with v2 auth (Keystone). Assuming you have a recent version of python-swiftclient, python-keystoneclient and swift you need to first add a few users which is easily done with this script : Assuming you have already your OS_* variables configured with an admin, you can just launch it and it will : add a tenant/user named test/tester. add a tenant/user name test2/tester2....

June 14, 2013

Keystone and PKI tokens overview

PKI tokens has been implemented in keystone by Adam Young and others and was shipped for the OpenStack grizlly release. It is available since the version 2.0 API of keystone. PKI is a beautiful acronym to Public-key infrastructure which according to wikipedia defines it like this : Public-key cryptography is a cryptographic technique that enables users to securely communicate on an insecure public network, and reliably verify the identity of a user via digital signatures....

May 2, 2013

Howto revoke a token with keystone and PKI (v2.0 API)

This is something I have been asked and I was at first under impression it was only available in v3, digging a bit more into the code there is actually a way to do that in v2 when you are using PKI tokens. Since I could not find much documentation online here is a description of the steps how to do it. Let first get a PKI token, you can do it the hard way by sending a json blob to the keystone url and parse the json results like this :...

April 22, 2013

Upload to OpenStack Swift via CORS/HTML5 request.

One of our client at eNovance had a need to be able to upload to Swift directly from a web browser without going via a PHP proxy. Things in browser-land are not exactly the same as what we have in user-land, it is a bit more restricted to ensure the end-user security and there is a few hoops to jump through to get it working. To be able to do a xmlrpc upload to another server (swift in this case) there is a ‘standard/recommendation’ document made by W3C about it located here :...

February 1, 2013