Creating staging and other environments in Rails

Ruby on Rails come with three environments by default – development, testing and production. But sooner or later one has a need for staging environment. And don’t get me wrong, you can (or should?) use the production settings there, but if you run it locally or on the same server as production, chances are you […]

InvoicePrinter: generate PDF invoices and receipts in seconds with pure Ruby

They are many options how to generate PDF versions of your invoices in Ruby and the ones that do not come with system dependencies are often built on top of Prawn library. InvoicePrinter is no different. Here is a short announcement on what it is (and aims to be) and what not.

Building and consuming JSON API with Crystal

When I firstly heard about Crystal language, I got really exited. It fixes exactly four problems I sometimes have with Ruby; types, speed, memory consumption and compilation to machine code. After many months silently following its development I decided to try it out for a simple program I need — a simple server standing between […]

Allowing NGINX to use a Puma/Unicorn UNIX socket with SELinux

If you are deploying Ruby web application on Fedora with Puma (or other) application server and NGINX web server as a proxy, you might encounter SELinux forbidding NGINX to use the Puma socket. Here is how to create a SELinux policy module that you can use during your server provisioning.

Setting up git push code deploy to remote server

If you are setting up your own remote server/VPS you will probably like to make it easy to deploy your code with simple git push. In other words you want to setup something that providers such as Heroku or OpenShift let you do to deploy your code. Luckily, it’s very easy!

What to do if Vagrant machine becomes unresponsive (KVM)

If you are using Vagrant with KVM (with vagrant-libvirt plugin) on Fedora, you might have experienced that sometimes the KVM virtual machine becomes unresponsive. Simply put you would wait forever for trying to ssh to the machine using vagrant ssh. It unfortunately happens to me sometimes when my laptop goes to sleep. So the simple […]