During the bi-yearly review of my setup, I realized I was running a Linux machine without full disk encryption. The encryption of the disk needed to be done ASAP, but I was not willing to reinstall the whole operating system to achieve that. Solution? I came up with an interesting way to encrypt my existing … Continue reading Encrypt an existing Linux installation with zero downtime (LUKS on LVM)
Scaling to 100k Users | Alex Pareto
Many startups have been there – what feels like legions of new users are signing up for accounts every day and the engineering team is scrambling to keep things running. This is a good introductory post on architecture scaling. Definitely an interesting read that presents the concept behind scaling in a short, comprehensive, and meaningful … Continue reading Scaling to 100k Users | Alex Pareto
How a Terraform + Salt + Kubernetes GitOps infrastructure enabled a zero downtime hosting provider switch
The switch It has been a busy weekend: I switched the hosting provider of my whole cloud infrastructure from DigitalOcean to Hetzner. If you are reading this it means that the switch is completed and you are being served by the Hetzner cloud. The interesting fact about the switch is that I managed to complete … Continue reading How a Terraform + Salt + Kubernetes GitOps infrastructure enabled a zero downtime hosting provider switch
TLS-terminated Bitlbee with custom protocols
Five years ago I started a small GitHub project aimed to run Bitlbee seamlessly in a container. Why Bitlbee? Back in the day, I was relying heavily on IRC for my daily communications and the plethora of other protocols that were starting to get traction was too much: I wanted to have a bridge between … Continue reading TLS-terminated Bitlbee with custom protocols
PSA: this website honors your browser preferred color scheme (light/dark theme)
The latest tech trend is to enable dark themes among all applications and devices: as the passionate tweaker I am, I set up every device and application I use to harness a light theme during daylight and dark mode at all other times. Whenever a light (or dark) theme is applied system-wide, most of the … Continue reading PSA: this website honors your browser preferred color scheme (light/dark theme)
How I stay on top and process my professional email with IMAP Flags, Sieve and Thunderbird
At my current job, I am lucky enough to choose which mail user agent I can run to process my professional email: after a lot of experiments, I decided to stick with Thunderbird, because it is open source and it can be heavily customized. It seems, though, that I am not the only one to … Continue reading How I stay on top and process my professional email with IMAP Flags, Sieve and Thunderbird
Startup order in Docker containers
Motivation I recently dealt with an application that is comprised of multiple services running in containers. Even though every part of this application is correctly split into each separated microservice, the independence of each service is not enforced. This lack of independence has several drawbacks, one of which is that containers must be started by … Continue reading Startup order in Docker containers
On servers timezone and tmux
A while ago I was fighting with a timezone set on a server because of the daylight saving time kicked in: during the ghost hour I had troubles with finding automated jobs. Moreover, the server was located overseas and depending on when I was checking the remote date and time, I could get a different … Continue reading On servers timezone and tmux
Automatic (or unattended) upgrades in openSUSE, CentOS and Fedora, Debian and Ubuntu
Each one of us is a system administrator: for at least your workstation (or notebook) you can decide when and how to administrate it. In the special case in which you are being elected to administer servers too, the matter becomes thorny: what is the workflow in terms of patching, time of reaction to security … Continue reading Automatic (or unattended) upgrades in openSUSE, CentOS and Fedora, Debian and Ubuntu
La mia esperienza con SPID e Poste Italiane
Questa settimana ho deciso di attivare lo SPID (Sistema Pubblico di Identità Digitale). Cosa è lo SPID L’identità digitale SPID è rappresentata da un username e una password che vi permettono di autenticarvi sui siti della Pubblica Amministrazione (PA). I suoi usi sono molteplici e sta prendendo sempre più piede per le comunicazioni online tra … Continue reading La mia esperienza con SPID e Poste Italiane