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Programming/Container: Sysdig Report, CNCF, SaaS and Qt Software Development Kit (Qt SDK)

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  • 4 container usage takeaways from the 2019 Sysdig report

    You probably already knew that most of the containers created by developers are disposable, but did you realize that half of them are only around for less than five minutes? That and other fascinating details are available in the latest annual container report from Sysdig, a container security and orchestration vendor.

    This is the company’s third such report. The results are obtained from their own instrumentation collected from a five-day period last month of the more than 2 million containers used by their own customers. This means the results could be somewhat skewed toward more experienced container developers.

    Nevertheless, the report merits some scrutiny. Here are four important takeaways.

  • CNCF Adopts Longhorn Storage Project from Rancher Labs

    Based on 30,000 lines of Go code employed to create separate engine and management plane, Longhorn is significantly lighter than traditional storage software because it builds on existing Linux storage primitives, Liang says. It also doesn’t require a dedicated storage administrator to deploy and manage. It’s designed from the ground up to be used by the same team managing the Kubernetes cluster, he notes, adding modern storage hardware such as solid-state drives (SSDs) and NVMe backplanes made it easier to build Longhorn without compromising performance.

    While some applications might want to access block storage directly, Liang says Rancher Labs expects most organizations will layer a file system on top of Longhorn to access various forms of persistent storage.

  • Lessons From A Failed SaaS - Building SaaS #37

    In this episode, we talked about the things I learned from my SaaS project and some of the reasons why it failed to succeed financially. We dug into the technical and marketing challenges that I faced and what went wrong.

    I’m shutting down my side project, College Conductor. The SaaS never achieved a sustainable level of success. I started the site to help my wife with her college consulting business. As you can see from what follows, the site didn’t mange to deliver what she (or anyone else) really needed.

  • Setup Complete Qt SDK on Ubuntu Eoan Ermine

    Qt Software Development Kit (Qt SDK) includes Qt Creator IDE & Qt Framework Libraries with Full Code Examples among other things. On Ubuntu 19.10, if you want to develop GUI applications with Qt, you need to install that Qt SDK first with a C++ compiler. Installing it on 19.10 is slightly different to different to 18.04 as this involves configuring GNU GCC C++ compiler on 19.10. After setup, you will have a ready, complete Qt SDK with Creator, Designer, Linguist, and Assistant works with G++ compiler. I hope this will be useful for you all. Happy hacking!

More in Tux Machines

Programming Leftovers

  • Faster Winter 4: Export lists

    Without an export, the compiler has to assume that every top-level function can possibly called from the outside, even functions that you think of as “internal”. If you have a function that you do not export, like instr, step_work and step after my change, the compiler can see all the places the function is called. If the function is only called in one place, it may inline it (copy its definition into where it is called), and simplify the code around the edges. And even if it does not inline the function, it might learn something about how the functions are used, and optimize them based on that (e.g. based on Demand Analysis).

  • Ondřej Holý: How to call asynchronous function synchronously

    GLib provides a lot of asynchronous functions, especially to deal with I/O. Unfortunately, some functions don’t have synchronous equivalents and the code has to be split into several callbacks. This is not handy in some cases. My this year’s GSoC student recently asked me whether it is possible to create synchronous function from asynchronous. He is currently working on test suite and don’t want to split test cases into several callbacks. So I decided to write a blog spot about as it might be handy for more people.

  • Sort list alphabetically with python

    You will be given a vector of string(s). You must sort it alphabetically (case-sensitive!!) and then return the first value. The returned value must be a string and have “***” between each of its letters. You should not remove or add elements from/to the array. Above is another problem in codewars, besides asking us to sort the array list and returning the first value in that list, we also need to insert stars within the characters.

  • Abolishing SyntaxError: invalid syntax ...

    Do you remember when you first started programming (possibly with Python) and encountered an error message that completely baffled you? For some reason, perhaps because you were required to complete a formal course or because you were naturally persistent, you didn't let such messages discourage you entirely and you persevered. And now, whenever you see such cryptic error messages, you can almost immediately decipher them and figure out what causes them and fix the problem. Congratulations, you are part of an elite group! Even a large number of people who claim that they can program are almost certainly less capable than you are. Given your good fortune, would you mind donating 5 to 10 minutes of your time to help countless beginners that are struggling in trying to understand Python error messages?

  • Is it too late to integrate GitOps?

    The idiom “missed the boat” can be used to describe the loss of an opportunity or a chance to do something. With OpenShift, the excitement to use this new and cool product immediately may create your own “missed the boat” moment in regards to managing and maintaining deployments, routes, and other OpenShift objects but what if the opportunity isn’t completely gone? Continuing with our series on GitOps (LINK), the following article will walk through the process of migrating an application and its resources that were created manually to a process in which a GitOps tool manages the assets. To help us understand the process we will manually deploy a httpd application. Using the steps below we will create a namespace, deployment, and service and expose the service which will create a route.

Canonical Teases Big Ubuntu Announcement with Leading Global Automation Company

Canonical, the company behind the popular Ubuntu Linux operating system, announced today that it will be present at the upcoming Smart Product Solutions (SPS) 2019 event in Nuremberg to showcase Ubuntu Core to the industrial Mittelstand. Canonical continues to promote its Ubuntu Core operating system, a slimmed-down version of Ubuntu designed and optimized to run on smaller, embedded hardware, such as IoT (Internet of Things) devices, and it now promises to support the Mittelstand innovators, which are medium-sized companies, with Open Source software and GNU/Linux technologies. Read more Also: The lifecycle of a component

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