I’ve been using Midnight Commander for years and I still enjoy it pretty much. The first time I’ve seen a file manager using the multi-column layout was on NeXTSTEP operating system. It was pretty smart, I felt in love with this operating system. When I first used yazi it reminded me of the early days of this OS who hasn’t been around long enough for my taste. So let me introduce you to yazi, a terminal based multi-column file manager written in Rust. ...

After two years of efforts and a $300k donation to the Zig Software Foundation, Mitchell Hashimoto has just announced the availability of version 1.0 of his Ghostty terminal emulator. He wanted Ghostty to be fast, feature-rich, and native on MacOS and Linux. I couldn’t find on the documentation a list of default key bindings for MacOS so here it is, plus some more stuff that I used extracted from the documentation. We don’t see any new terminal emulator often, so I urge you to try it out. ...

Creating and renewing TLS certificates is a tedious and boring task when done manually. It can be automated by using Let’s Encrypt for example but in an Enterprise environment, where you have your own CA, that’s maybe not an option any more. In this article we’ll share a workflow which leverage HashiCorp Vault to automate TLS certificate provisioning, revocation and renewal. It allows us to offer a PKI as a Service solution to our applications and users, they’ll get a self service API endpoint where they can get, renew and revoke their TLS certificates. ...

Evolution is drastic in IT, we now see applications running in containers, public clouds eating the world with self-service offerings. The world of computing has to adapt and provide a foundation for this constant innovation. This is exaclty what the CoreOS team have been doing for almost four years. It all started with CoreOS a minimalistic Linux operating system which have recently been renamed Container Linux, which gives a quick overview of what it is built for. It’s only purpose is to be a foundation layer to run your containerized and distributed cloud-native application. Having such a reduced footprint makes it way more secure, it was the driving force behind it. Also by reducing the adherence between your application and the infrastructure operating system, updates becomes way easier, so your environment will be kept secured. Container Linux offer a minimum set of binaries, mostly systemd, etcd, rkt and flannel for networking. Anything else can run as containers on top of Container Linux. ...

Containers are taking the IT world by storm, instead of re-inventing the wheel, CoreOS wants to offer the next-generation open source app container runtime, designed for security, simplicity and composability. But above all, they want to play fair with the ecosystem by ensuring it is built on common open standards and use what’s readily available like systemd and Kubernetes. rkt is written in Go, it compile to a single static binary, so it is easily portable to any modern system, for the rest read on. ...

As we’ve already seen in our previous articles Mirantis Cloud Platform (MCP) is really flexible and can tackle lots of different use cases. Last time we’ve looked at using Ceph as the OpenStack storage backend. Today we are reviewing different ways to leverage Neutron Open vSwitch ML2 plugin instead of the standard OpenContrail SDN solution to offer networking as a service to our users. Introduction To model Open vSwitch Networking in MCP, we first have to choose between different options. What kind of segmentation we’ll be using for our tenant networks, VxLAN or VLAN ? Do we want to use distributed routers (DVR) for East-West routing, and also to directly access floating IPs on Compute ? ...

In the last few articles, I’ve detailed the workflow to deploy Mirantis Cloud Platform (aka MK now MCP) based on Mirantis OpenStack and a Reclass Model Driven Architecture (MDA). But you may want to use a different backend for storage then our standard MCP one, the reference Cinder LVM ISCSI Driver. In this MCP cookbook article, I’ll guide you step by step, to use Ceph as your storage backend for Glance (Images), Cinder (Volumes) and Nova (Guest Disks). You can use any of these options alone or combined. ...

In this article we assume that you are familiar with Salt, formulas, reclass and OpenStack-Salt. This is my cheatsheet which drives you step by step to deploy OpenStack Mitaka based on the latest model, using a new Cluster Class. If you feel lost, feel free to get back to the beginning. What’s new The mk-lab-salt model, built for training and development, introduce the following new features Salt Master now runs on Ubuntu 16.04 LTS OpenStack packages comes from Mirantis repositories New top level cluster class allows a simple modeling of multiple deployments in a single reclass model. Mirantis Stacklight, logging, monitoring and alerting tooling is now integrated Modeling your Infrastructure In this session, I’ll be using my forked repository of Mirantis mk-lab-salt-model infrastructure modeling. ...