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Programming: Git and Qt

Submitted by Roy Schestowitz on Monday 28th of September 2020 04:19:33 PM Filed under
Development
  • Understand the new GitLab Kubernetes Agent

    GitLab's current Kubernetes integrations were introduced more than three years ago. Their primary goal was to allow a simple setup of clusters and provide a smooth deployment experience to our users. These integrations served us well in the past years but at the same time its weaknesses were limiting for some important and crucial use cases.

  • GitLab Introduces the GitLab Kubernetes Agent

    The GitLab Kubernetes Agent (GKA), released in GitLab 13.4, provides a permanent communication channel between GitLab and the cluster. According to the GitLab blog, it is designed to provide a secure solution that allows cluster operators to restrict GitLab's rights in the cluster and does not require opening up the cluster to the Internet.

  • Git Protocol v2 Available at Launchpad

    After a few weeks of development and testing, we are proud to finally announce that Git protocol v2 is available at Launchpad! But what are the improvements in the protocol itself, and how can you benefit from that?

    The git v2 protocol was released a while ago, in May 2018, with the intent of simplifying git over HTTP transfer protocol, allowing extensibility of git capabilities, and reducing the network usage in some operations.

    For the end user, the main clear benefit is the bandwidth reduction: in the previous version of the protocol, when one does a “git pull origin master”, for example, even if you have no new commits to fetch from the remote origin, git server would first “advertise” to the client all refs (branches and tags) available. In big repositories with hundreds or thousands of refs, this simple handshake operation could consume a lot of bandwidth and time to communicate a bunch of data that would potentially be discarded by the client after.

    In the v2 protocol, this waste is no longer present: the client now has the ability to filter which refs it wants to know about before the server starts advertising it.

  • Qt Desktop Days 7-11 September

    We are happy to let you know that the very first edition of Qt Desktop Days 2020 was a great success! Having pulled together the event at very short notice, we were delighted at the enthusiastic response from contributors and attendees alike.

  • Full Stack Tracing Part 1

    Full stack tracing is a tool that should be part of every software engineer’s toolkit. It’s the best way to investigate and solve certain classes of hard problems in optimization and debugging. Because of the power and capability it gives the developer, we’ll be writing a series of blogs about it: when to use it, how to get it set up, how to create traces, and how to interpret results. Our goal is to get you capable enough to use full stack tracing to solve your tough problems too.

    Firstly, what is it? Full stack tracing is tracing on the full software stack, from the operating system to the application. By collecting profiling information (timing, process, caller, API, and other info) from the kernel, drivers, software frameworks, application, and JavaScript environments, you’re able to see exactly how the individual components of a system are interacting. That opens up areas of investigation that are impossible to achieve with standard application profilers, kernel debug messages, or even strategically inserted printf() commands. One way to think of full stack tracing is like a developer’s MRI machine that allows you to look into a running system without disturbing it to determine what is happening inside. (And unlike other low-level traces that we’ve written about before, full stack tracing provides a simpler way to view activity up and down the entire software stack.)

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today's howtos

  • How to install go1.19beta on Ubuntu 22.04 – NextGenTips

    In this tutorial, we are going to explore how to install go on Ubuntu 22.04 Golang is an open-source programming language that is easy to learn and use. It is built-in concurrency and has a robust standard library. It is reliable, builds fast, and efficient software that scales fast. Its concurrency mechanisms make it easy to write programs that get the most out of multicore and networked machines, while its novel-type systems enable flexible and modular program constructions. Go compiles quickly to machine code and has the convenience of garbage collection and the power of run-time reflection. In this guide, we are going to learn how to install golang 1.19beta on Ubuntu 22.04. Go 1.19beta1 is not yet released. There is so much work in progress with all the documentation.

  • molecule test: failed to connect to bus in systemd container - openQA bites

    Ansible Molecule is a project to help you test your ansible roles. I’m using molecule for automatically testing the ansible roles of geekoops.

  • How To Install MongoDB on AlmaLinux 9 - idroot

    In this tutorial, we will show you how to install MongoDB on AlmaLinux 9. For those of you who didn’t know, MongoDB is a high-performance, highly scalable document-oriented NoSQL database. Unlike in SQL databases where data is stored in rows and columns inside tables, in MongoDB, data is structured in JSON-like format inside records which are referred to as documents. The open-source attribute of MongoDB as a database software makes it an ideal candidate for almost any database-related project. This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo‘ to the commands to get root privileges. I will show you the step-by-step installation of the MongoDB NoSQL database on AlmaLinux 9. You can follow the same instructions for CentOS and Rocky Linux.

  • An introduction (and how-to) to Plugin Loader for the Steam Deck. - Invidious
  • Self-host a Ghost Blog With Traefik

    Ghost is a very popular open-source content management system. Started as an alternative to WordPress and it went on to become an alternative to Substack by focusing on membership and newsletter. The creators of Ghost offer managed Pro hosting but it may not fit everyone's budget. Alternatively, you can self-host it on your own cloud servers. On Linux handbook, we already have a guide on deploying Ghost with Docker in a reverse proxy setup. Instead of Ngnix reverse proxy, you can also use another software called Traefik with Docker. It is a popular open-source cloud-native application proxy, API Gateway, Edge-router, and more. I use Traefik to secure my websites using an SSL certificate obtained from Let's Encrypt. Once deployed, Traefik can automatically manage your certificates and their renewals. In this tutorial, I'll share the necessary steps for deploying a Ghost blog with Docker and Traefik.

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