Chaos Computer Club - archive feed

In Firefox 56, the encoding_rs character encoding conversion crate replaced Firefox’s previous encoding conversion library that was written in C++. This talk examines the API design characteristics that allowed the Rust API of encoding_rs to be mapped to an idiomatic C API and how it was possible to re-create an almost exact modern C++ analog of the Rust API on top of the C API. Rather than trying...

This is a talk about the architecture of yew — a Rust framework for frontend development, inspired by Elm and ReactJS and designed for creating single-page webapps with Rust. You will get to know how it was created: wasm compilation issues, JSX-like templates created with a pure Rust macro, how lifetime rules helps to avoid copying of the model, and how to create a framework without a garbage coll...

In the time of clouds and virtual computing it seems, there is no longer space for a large real-hardware-based OS deployments. But what schools use in their classrooms? What is beneath ATMs, info kiosks, cash registers? For there devices real network OS deployment is still crucial. This talk is about exactly that. Well known network PXE boot, but upgraded with Salt, a modern configuration manageme...

GNU Health is a social project that provides a community-based, Free/Libre Health and Hospital Information System deployed in many countries around the globe. GNU Health combines Social Medicine and Primary healthcare principles with state of the art advances in bioinformatics and precision medicine, delivering a valuable framework for governments and Public Health institutions, as well as for aca...

YaST comes with a brand new storage stack. The packages libstorage and yast2-storage have been replaced by the new libstorage-ng and yast2-storage-ng. YaST team has put a lot effort on having its new storage ready for openSUSE Leap 15 (and SUSE SLE 15), and now it is time to present how it works. In this presentation we will explain storage-ng from a technical point of view. For example, we will d...

Tyler Neely After years of getting whooped by bugs at scale at various North American infrastructure companies, Tyler moved to Berlin where he spends his days reading papers, finding bugs in complex systems, and building Sled - a modern embedded database for the Rust ecosystem. He believes on-call people should sleep as long as they want. The wild success of testing tools like Jepsen is a wake-up...

VPP (Vector Packet Processing) is the opensource software aiming to very fast data-processing and its part of the umbrella project known as FD.io This talk describes how to design and integrate a new L4 protocol in the existing VPP (Vector Packet Processing) framework. We will use as an example the novel SCTP implementation which has been developed (and now maintained) by the SUSE employee Marco V...

Event logging is a central source of information for IT operations and security. The syslog-ng application collects logs from many different sources, performs real-time log analysis by processing and filtering them, and finally it stores the logs or forwards them for further analysis. The same feature set comes in handy in a containerized environment too, where you start and stop containers around...

Link time optimization (LTO) extends scope of compiler optimizations to whole program or DSO. We present some data on pros & cons of using LTO to build openSUSE distribution by default. This is joint with with Martin Liška and Martin Jambor. Link time optimization (LTO) extends scope of compiler optimizations to whole program or DSO. We present some data on pros & cons of using LTO to build openSU...

Driven by curiosity and some late night ebay purchases, I ended up down the rabbit hole of building a cloud from scratch: why use OpenStack when you can do it the hard way. This was a great excuse to dive into the various subsystems required to assemble a cloud and to find out how frustrating aspects of it could be. A cloud is a jigsaw, requiring many different pieces to fit together and co-operat...

Topic: Banking with Django - how to not lose your customer's money Abstract: How Holvi decided to pick Django as part of their core infrastructure. I'll go through both the business reasons for using Django for banking (5-10 minutes), and technical details of how we do reliable distributed software which keeps our and customer's money safe (10-20 minutes). about this event: https://c3voc.de

In this talk, I’ll talk about GraphQL, a data query language created by Facebook as an alternative to the widely used REST. I’ll list the key differences between the twos and pros and cons of GraphQL over a “traditional” REST API. I’ll tell why GraphQL has been created, what problems does it solve and how to create GraphQL APIs with Python with an additional follow up on how to use it with Django,...

Very often we come across a masterpiece of software, while now days almost everything is cool and built for the web, or built with technologies that are changing every single day and moving forward, but often we forget how the user feels when new software is available to download and install, it can be an overwhelming experience. This talk is meant to talk about how some projects show the true mea...

The Kubic Project is an exciting new part of the openSUSE family. This talk will provide a brief introduction of the Project and how it focuses on container technologies such as the Docker & Podman runtimes, Kubernetes, Transactional (Atomic) Operating System updates, and much more. The session will then go into detail how Kubic provides the base for SUSE's Container as a Service Platform (CaaSP),...

The original Ceph Manager Dashboard that was introduced in Ceph "Luminous" started out as a simple, read-only view into various run-time information and performance data of a Ceph cluster, without authentication or any administrative functionality. However, as it turns out, there is a growing demand for adding more web-based management capabilities, to make it easier for administrators that prefer...

If your hometown can benefit from a free, friendly environment where women can learn to program, it’s time to bring Django Girls to your city. You’ll learn what it takes to run a successful event while hearing tales from the trenches from a seasoned Django Girls organizer. Ever heard of Django Girls and thought, “Gee, if only that would come to my city, I’d love to be involved!” Django Girls is a...

Why is dealing with dates and time so difficult? Well, it's because time has a very sordid history. Join us on a deep dive into that history, and how that history affects the data modelling and APIs we use every day. Here's a fun experiment: Mention timezones within earshot of any experienced programmer. Now wait until the profanity stops. Handling dates and time is an incredibly common requiremen...

about this event: https://c3voc.de

Systems management in the era of containerization and hybrid clouds can challenge even the most seasoned professional. In this session, we'll learn how to control the chaos by bringing disciplined automation practices to the rescue. Presented by the principal maintainer of the SaltStack project -- one of the largest and most active open-source communities in the world -- we'll learn how to use Sal...

Many of us use osc on a daily base. This talk will be about new features in osc, plugins and best practices. At the end I will provide a small outlook what new features are planned. Many of us use osc on a daily base. This talk will be about new features in osc, plugins and best practices. At the end I will provide a small outlook what new features are planned. about this event: https://c3voc.de

This talks is split in three topics: 1. openSUSE is not SUSE, it is her sister. There are still too much people outside of open/SUSE world that still confuse the difference and the options they have. This usually leads them to use the wrong distribution for their use cases and thinking that "SUSE" is not working for them. I will describe the current distribution palette and their respective key va...

- - about this event: https://c3voc.de

In Tumbleweed with have roughly ~25.000 packages for 64-bit architecture. Do you know how many of those are actually install-able? From those who are not, do you know the reason behind? Do you know how many of those will become install-able if boo#123456 gets fixed? And from those which can actually be installed, do you know if there are any glitches at the post-installation scripts? -Sure, we hav...

- - about this event: https://c3voc.de

You want to learn more about distributed storage solutions and in particular about Ceph? In this talk I would like to give you a quick introduction about distributed storage and Ceph at a glance. What is it? Why is it useful? Why do I need it? Isn't a single NAS system suffiecient? Who should join? Everyone who uses storage :-) What is Ceph? Ceph’s foundation is the Reliable Autonomic Distributed...