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Server Leftovers

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Server
  • DHCP Server Conflict Detection

    This blog title should really be, “Why you always, always, always want conflict detection turned on on all the networks MAAS touches,” but that’s really long as a title. But hear me out.

    As promised, here is another DHCP blog, this time explaining how you can have multiple DHCP servers on the same subnet, serving overlapping IP addresses. There are a lot of network-savvy folks who will tell you that serving the same set of IP addresses from two different DHCP servers just won’t work. While that’s a really good rule to follow, it isn’t totally accurate under all conditions.

  • DHCP scope

    It’s possible to have more than one DHCP server on the same network and still have everything work right, with no conflicts and no dropped packets or IP requests. It’s really not that hard to pull together, either, but there are some things to know, and some things to consider before we investigate that situation. For this blog, we’ll put some of the overlooked facets of DHCP in bold text. Let’s take a look.

  • LXD - Container Manager

    I recently started working for InfluxData as a Developer Advocate on Telegraf, an open source server agent to collect metrics. Telegraf builds from source to ship as a single Go binary. The latest - 1.19.1 was released just yesterday.
    Part of my job involves helping users by reproducing reported issues, and assisting developers by testing their pull requests. It’s fun stuff, I love it. Telegraf has an extensive set of plugins which supports gathering, aggregating & processing metrics, and sending the results to other systems.
    Telegraf has a huge set of plugins, and there’s super-diverse ways our users deploy Telegraf, sometimes I have to stand up one-off environments to reproduce reported issues. So I thought I’d write up the basics of what I do, partly for me, and partly for my co-workers who also sometimes need to do this.
    My personal and work computers both run Kubuntu 21.04. Sometimes issues are reported against Telegraf on other Linux distributions, or LTS releases of Ubuntu. In the past I’d use either VirtualBox or QEMU to create entire Virtual Machines for each Linux distribution or product I’m working with. Both can be slow to stand up clean machines, and take a fair chunk of disk space.
    These days I prefer to use LXD. LXD is a system container manager, whose development is funded and led by Canonical, my previous employer. It’s super lightweight, easy to use and fast to setup. So it’s the tool I reach for most for these use cases.
    Note that LXD can also launch Virtual Machines but I tend not to use that feature, preferring lightweight containers.

    [...]

    I’ve been a big fan of LXD for some years now. I’ve found it a super fast, reliable way for me to spin up lightweight machines running random Linux distributions, and throw them away when done. It helps keep all those random and unstable pieces of software I’m testing nicely compartmentalised, and easy to nuke.

  • Pentagon kills Microsoft’s $10B JEDI cloud contract, says tech is now outdated | Ars Technica

    Amazon's legal stall tactics seem to have paid off.

More in Tux Machines

digiKam 7.7.0 is released

After three months of active maintenance and another bug triage, the digiKam team is proud to present version 7.7.0 of its open source digital photo manager. See below the list of most important features coming with this release. Read more

Dilution and Misuse of the "Linux" Brand

Samsung, Red Hat to Work on Linux Drivers for Future Tech

The metaverse is expected to uproot system design as we know it, and Samsung is one of many hardware vendors re-imagining data center infrastructure in preparation for a parallel 3D world. Samsung is working on new memory technologies that provide faster bandwidth inside hardware for data to travel between CPUs, storage and other computing resources. The company also announced it was partnering with Red Hat to ensure these technologies have Linux compatibility. Read more

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.