Accessing remote libvirt on a non-standard SSH port via virt-manager

Scenario: you are using a remote host as a virtualization host with libvirt and you want to manage it via ”Virtual machine manager” (virt-manager) over SSH. But SSH is listening on a non-standard port, and virt-manager does not offer you to connect to a remote libvirt instance on a non-standard port. Fear not, the option …

Automatically update your Docker base images with watchtower

I’m an avid user of Docker containers, using base images pulled from the public registry DockedHub. As you may know, Docker containers are based on Docked base images, e.g. I run postgres containers that are based on Postgres base image. It occurs that base images could get updated by their respective author (in our case Postgres team) and pushed to DockerHub. …

Incubo PuntoCom Shop: NON acquistate su questo sito!

Recentemente ho acquistato un iPhone 8 sul sito PuntoCom Shop (linkato in nofollow). Dopo una settimana dall’acquisto, il telefono ha presentato un difetto con la fotocamera, scattando foto con un alone rosa; il difetto è conosciuto da Apple, tant’è che non sono l’unico ad essere stato vittima di questo difetto hardware Apple. Recandomi in un …

Docker and containerd on openSUSE: reaching the limit for cgroup (and how to overcome it!)

I recently encountered a limitation during an experiment I was conducting; after some trial and error, I recognized that the limitation was due to cgroups. But let’s start from the beginning. I open sourced docker-salt, a small pet project I had in mind in order to have a full blown setup for SaltStack: a master …

Secure your SSH server against brute-force attacks with Fail2ban

The problem: SSH can be brute-forced I usually leave an SSH server on a dedicated port on every server I administer and, as you may recall, I even linked two well-written guides to properly configure and harden SSH services. Now, Internet is a notoriously bad place: scanners and exploiters have always been there, but brute-forcers …

OpenSUSE Leap 42.2: this is how I work (my setup)

Motivation I switched my distribution of choice to OpenSUSE. There are a lot of motivations behind this choice: I wanted an enterprise-grade quality of software in terms of stability, package choice, and supportability Growing interest in software non-distribution specific and/or customized, e.g. Gnome Dogfooding After nearly one year of usage, I can say that I …