Loic Tosser

French Nerd! #sysadmin #Rust #FreeBSD #Go #Archlinux #PostgreSQL #erlang #elixir Nam et ipsa scientia potestas est

alpine

Live Free or RAM Hard: Declarative Linux Style

Tired of bricking Linux servers? Try Alpine Linux: a lightweight, secure NixOS alternative. Explore diskless and data modes for better security and efficiency. Run Docker on 352MB RAM with our QEMU guide. Ideal for efficiency.

alpine

Our Journey Through Linux/Unix Landscapes

From Arch to Alpine: Our Journey Through Linux Landscapes. Discover how we slashed storage, vulnerabilities, and maintenance time!

sysadmin

DNS Load Balancing: The Illusion of Simplicity

Explore when to use DNS load balancing and the key conditions for its effectiveness in managing network traffic.

observability

Unmasking HTTP Logs: From Blind Spots to Full Visibility with Gleam and Quickwit

Standard HTTP logs miss crucial details like request and response bodies, hindering debugging. Our article offers solutions for complete HTTP logging, ensuring you have all the necessary information for effective web management.

devops

The DevOps is dead, long live the DevOps!

Let's be clear, DevOps is just becoming out of control, everything is DevOps, or worst, DevSecOps, DevSecFinOps, DevOpsOps (sic). The original definition of the word is lost, and it is hurting badly a lot of jobs: Sysadmin, DBAs, SREs. Let's put things straight, We Love DevOps,

ansible

It is Infrastructure as Code, not Infrastructure as YAML!

Welcome back to our blog, after our summer break! We did one article per week for 51 weeks (yes, we know, almost a year), and we thought that a pause was necessary, in order to have some inspiration and stories to tell! So here we are: choosing a topic, and

automation

Automation: n8n strikes back

Almost 2 years ago, we introduced a new automation tool in this article [https://blog.kalvad.com/n8n-on-clever-cloud/]: n8n, and we know that some people were using our article to deploy it in production. Here is the small issue: our deployment was made back in the days, and nowadays, a

sysadmin

Uptime Kuma, SQLite and Litestream!

How can you deploy a SQLite application on almost any cloud provider in a secure and reliable way!

archlinux

Archlinux in Production?

Is archlinux viable in production? Why you should use it too? Is that better than Ubuntu? (YES!!!)

selfhosting

To Cloud or not to Cloud

Kalvad is very present in the Middle East, especially on certain topics: * Fixers: we are the people who can fix everything * High Performance Systems * Crazy constraints apps Of course, you don't find this kind of setup in a small startup, mostly in big Corporations or Governmental Entities. And

crystal

Dhakira, the cloud-native Web Server or Why Hosting some static assets is still so complicated?

Let's be clear here, I'm French, so I'm complaining a lot! And some people are saying: > Loïc, you should not be so negative! Where are your solutions? So let me tell you a nice story! Static For the Win As you may know,

devops

What do monitoring metrics tell us?

Monitoring is a wide topic that provides the real-time status of the health of targeted applications, services, infrastructure ..etc. Real-time streaming of these metrics and visualizing them into graphs are the most crucial parts of the monitoring service. Introduction In this article, we will cover what metrics can tell us

SLA

The major root causes behind SLA degradation

In the previous article [https://blog.kalvad.com/sla-and-slo-fundamentals/], we described SLO and SLA and how to measure them on a WebServer like Nginx or Apache, and in this article, we will discuss the major root causes that decrease the SLA and how to deal with them. SLA Time-based : Time-based

SLA

SLA and SLO fundamentals

SLA aka Service-Level Agreement is an agreement you make with your clients/users, which is a measured metric that can be time-based or aggregate-based. SLA time-based We can calculate the tolerable duration of downtime to reach a given number of nines of availability, using the following formula: For example, a

clever cloud

Apache Airflow on Clever Cloud

During a recent interaction on Twitter [https://twitter.com/mtparet/status/1476569459762548738] (in French, sorry), some people were misbehaving and we were shocked to see the same story as usual: people are using software without understanding it (or reading the doc)! I blame a lot all these "ready-made"

IPFS

IPFS in-depth(Myths and Misunderstandings)

First of all, What is IPFS? The Interplanetary File System (IPFS) is a bundle of subprotocols and a project-driven by Protocol Labs, IPFS aims to improve the web’s efficiency and to make the web more decentralized and resilient. IPFS uses content-based addressing, where content is not addressed via a

devops

Sysadmin/DevOps/SRE people, we are on the way to a massive pauperization of our jobs!

If you follow us on LinkedIn, you should have seen that we are hiring a lot of people these days, especially in one department that is not the most active on the hiring part: Kalvad's Infrastructure Team (KIT™). The KIT™ has currently 2 members with me as the

ansible

Security is a never-ending process, not a validation step!

As you may know, if you are familiar with our blog, most people are considering us as IT's firefighters (and don't get me wrong, I'm not a big fan of middle-of-the-night phone calls). Usually, the main issue for middle-of-the-night calls is infrastructure, but from

sysadmin

How to handle a massive infrastructure problem

Tonight is one of these nights. It's 04:30 a.m. and I receive an emergency call (less than 3 hours after going to bed) from this customer which is important to us. They are asking for help, as they have a major issue in their data center

selfhosted

Using Open source software is the only way to have a sustainable business

I'm convinced for multiple years that open source is the future, however, after almost 10 years as a C-Level manager, my discourse changed a bit! Let's be clear, originally, my discourse was more political than rational. But I think it's time to write how

warp10

You are software engineers, so COMPILE YOUR SOFTWARE

Few weeks ago, I did a conference about Kubernetes/Docker (in French, sorry, but the slides are here [https://www.beautiful.ai/player/-MToF5BZRnhHDSNdjfhX]), and I put inside a statement that some people, rightfully, were holding me accountable for: Docker images are slow because they are using old technologies! The

startup

Surviving guide for a tech startup aka How to properly bootstrap your startup - Part 2

We highly recommend that you read the first part of this article: Stop building sandcastles aka How to properly bootstrap your startup - Part 1 [https://blog.kalvad.com/bootstrap-your-startup-part-1/] Introduction Your startup has a name, and a good base, now it's time to jump in. You want

startup

Stop building sandcastles aka How to properly bootstrap your startup - Part 1

Introduction At Kalvad, we are nerds, and proud to be, but it's not because we are nerds, that we are asocial. The problem we all faced whenever we say we work in IT in a discussion, is someone saying: "I have an idea for a startup"

security

Cheap DDoS on-demand or How to properly load test your application!

We decline all responsibility in case of any accidents following the usage of this tool! 2 weeks ago, we published an article The future of the internet is static! AKA how we scaled to 10 million users in a minute without crashing [https://blog.kalvad.com/the-future-of-website-is-static/], and 2 questions

scale

The future of the internet is static! AKA how we scaled to 10 million users in a minute without crashing

We usually define our company as a pure tech agency, but most of our customers are treating us like IT firefighters: they call us when the s**t is hitting the fan, and the house is burning. Introduction Almost a year ago, I got one of this middle of the