Julien Danjou (Page 3)

Julien Danjou

Attending PyCon FR 2017

The French edition of the annual Python conference, PyCon FR [https://pycon.fr/2017/], will happen in Toulouse from 21st to 24th September. I skipped the last few PyCon FR, but this year I will be back with a one-hour long talk entitled "Scalable and distributed applications in Python". It

Gnocchi or Prometheus?

Gnocchi or Prometheus?

The realm of time series database keeps expanding those last years. Now and then a new contender appears from the fog. People keep asking me about the difference between Gnocchi [http://gnocchi.xyz] and Prometheus [http://prometheus.io]. It's time to content them. Gnocchi and Prometheus are two open source

Using Gnocchi with Docker

Using Gnocchi with Docker

I've recently started to look into Docker to build images ready to be used with Gnocchi [http://gnocchi.xyz] in it. I found it would be a great way to distribute a working instance of Gnocchi. To this end, we created the gnocchi-docker [https://github.com/gnocchixyz/gnocchi-docker] repository on

Easy Python logging with daiquiri

Easy Python logging with daiquiri

After more than 10 years of writing Python, there's something I always have been annoyed with: logging. Don't read me wrong: I like the Python logging subsystem [https://docs.python.org/3/library/logging.html]. It's easy to use and works like a charm in most cases. If you never

Gnocchi 4 is out

Gnocchi 4 is out

Finally! Four months ago we pushed the Gnocchi 3.1 release and here we are now, release the 4th major version of that timeseries database. A lot happened in the last 4 months.First, as I already wrote about, we moved to GitHub for hosting our project [https://julien.danjou.

Sending GitHub pull-request from your shell

Sending GitHub pull-request from your shell

I've always been frustrated by the GitHub workflow. A while back I wrote how Gerrit workflow was superior [https://julien.danjou.info/blog/2013/rant-about-github-pull-request-workflow-implementation] to GitHub pull-request system. But it seems that GitHub listened and they improved the pull-request system these last years to include reviews, and different workflow

OpenStack Summit Boston 2017 recap

OpenStack Summit Boston 2017 recap

The first OpenStack Summit of 2017 [https://www.openstack.org/summit/boston-2017/] was last week, in Boston, MA, USA. I was able to attend as I've been selected to give 3 talks, to help for a hands-on and to animate an on-boarding session. This made sure I was a bit

Gnocchi independence

Gnocchi independence

Three years have passed since I started working on Gnocchi [http://gnocchi.xyz]. It's amazing to gaze at the path we wandered on. During all this time, Gnocchi has been "incubated" inside OpenStack. It has been created there and it grew with the rest of the ecosystem. But Gnocchi (developers)

Python never gives up: the tenacity library

Python never gives up: the tenacity library

A couple of years ago, I wrote about the Python retrying library [https://julien.danjou.info/python-retrying]. This library was designed to retry the execution of a task when a failure occurred. I started to spread usage of this library in various projects, such as Gnocchi [http://gnocchi.xyz], these

Scalable metrics storage: Gnocchi on Amazon Web Services

Scalable metrics storage: Gnocchi on Amazon Web Services

As I wrote a few weeks ago in my post about Gnocchi 3.1 being released [https://julien.danjou.info/blog/2017/gnocchi-3.1-release], one of the new feature available in this version it the S3 [https://aws.amazon.com/s3/] driver. Today I would like to show you how

Sending your collectd metrics to Gnocchi

Sending your collectd metrics to Gnocchi

Knowing that collectd [http://collectd.org/] is a daemon that collects system and applications metrics and that Gnocchi [http://gnocchi.xyz] is a scalable timeseries database, it sounds like a good idea to combine them together. Cherry on the cake: you can easily draw charts using Grafana [http://grafana.org]

FOSDEM 2017, recap

FOSDEM 2017, recap

Last week-end, I was in Brussels, Belgium for the 2017 edition of the FOSDEM [http://fosdem.org], one of the greatest open source developer conference. This year, I decided to propose a talk about Gnocchi [http://gnocchi.xyz] which was accepted in the Python devroom [https://fosdem.org/2017/schedule/

Gnocchi 3.1 unleashed

Gnocchi 3.1 unleashed

It's always difficult to know when to release, and we really wanted to do it earlier. But it seems that each week more awesome work was being done in Gnocchi [http://gnocchi.xyz], so we kept delaying it while having no pressure to push it out. > A photo posted by

Scaling Python is on its way

Scaling Python is on its way

My day-to-day activities are still evolving around the Python [http://python.org] programming language, as I continue working on the OpenStack [http://openstack.org] project as part of my job at Red Hat [http://redhat.com]. OpenStack is still the biggest Python project out there, and attract a lot of

Packaging Python software with pbr

Packaging Python software with pbr

Packaging Python has been a painful experience for long. The history of the various distribution that Python offered along the years is really bumpy, and both the user and developer experience has been pretty bad. Fortunately, things improved a lot in the recent years, with the reconciliation of setuptools [https:

Attending OpenStack Summit Ocata

Attending OpenStack Summit Ocata

For the last time in 2016, I flew out to the OpenStack Summit in Barcelona [https://www.openstack.org/summit/barcelona-2016/], where I had the chance to meet (again) a lot of my fellow OpenStack contributors there. How To Work Upstream with OpenStack My week started by giving a talk

Running an open source and upstream oriented team in agile mode

Running an open source and upstream oriented team in agile mode

For the last 3 years, I've been working in the OpenStack Telemetry team at eNovance [http://enovance.com], and then at Red Hat [http://redhat.com]. Our mission is to maintain the OpenStack Telemetry stack, both upstream and downstream (i.e. inside Red Hat products). Besides the technical challenges, the

Gnocchi 3.0 release

Gnocchi 3.0 release

After a few weeks of hard work with the team, here is the new major version of Gnocchi, stamped 3.0.0 [https://launchpad.net/gnocchi/3.0/3.0.0]. It was very challenging, as we wanted to implement a few big changes in it. Gnocchi is now using

AsciiDoc book toolchain released

AsciiDoc book toolchain released

Writing a book is a big undertaking. You have to think about what you will actually write, the content, its organization, the examples you want to show, illustrations, etc. When publishing with the help of a regular editor, your job stops there at writing – and that's already a big and

From decimal to timestamp with MySQL

From decimal to timestamp with MySQL

When working with timestamps, one question that often arises is the precision of those timestamps. Most software is good enough with a precision up to the second, and that's easy. But in some cases, like working on metering, a finer precision is required. I don't know exactly why, and it

A retrospective of the OpenStack Telemetry project Newton cycle

A retrospective of the OpenStack Telemetry project Newton cycle

A few weeks ago, I recorded an interview with Krishnan Raghuram about what was discussed for this development cycle for OpenStack Telemetry at the Austin summit. It's interesting to look back at this video more than 3 months after recording it, and see what actually happened to Telemetry. It turns

The definitive guide to Python exceptions

The definitive guide to Python exceptions

Three years after my definitive guide on Python classic, static, class and abstract methods [https://julien.danjou.info/guide-python-static-class-abstract-methods], it seems to be time for a new one. Here, I would like to dissect and discuss Python exceptions [https://docs.python.org/3/tutorial/errors.html]. Dissecting the base exceptions

The bad practice in FOSS projects management

The bad practice in FOSS projects management

During the OpenStack summit a few weeks ago, I had the chance to talk to some people about my experience on running open source projects. It turns out that after hanging out in communities and contributing to many projects for years, I may be able to provide some hindsight and

Gnocchi talk at the Paris Monitoring Meetup #6

Gnocchi talk at the Paris Monitoring Meetup #6

Last week was the sixth edition of the Paris Monitoring Meetup [http://www.meetup.com/Paris-Monitoring/events/230515751/], where I was invited as a speaker to present and talk about Gnocchi [http://gnocchi.xyz]. There was around 50 persons in the room, listening to my presentation of Gnocchi. The talk

The Hacker's Guide to Python 3rd edition is out

The Hacker's Guide to Python 3rd edition is out

Exactly a year ago, I released the second edition of my book The Hacker's Guide to Python [https://julien.danjou.info/the-hacker-guide-to-python-second-edition]. One more time, it has been a wonderful release and I received a lot of amazing feedback from my readers all over this year. Since then, the book