Ljubljana, Slovenia

Devops

A love song for Bash

There isn’t a day where I don’t see some kind of DevOps article that advocates some sort of higher order programming language for performing shell tasks, most recently one that uses Python to issue a POST request on a Discord Webhook API, when ever somebody logs into your server.

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Error handling in Go

Error handling in Go is uniquely designed to be explicit in the intent. You should return possible errors from functions and check/handle those returns. This, in contrast with other programming languages, might seem verbose and unfriendly, but it isn’t really so. Let’s go over some basic examples and move on to something less trivial.

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Things to know about HTTP in Go

Go has a very strong standard library, and one of the most used parts of it is the net/http package, which provides structures that make development of HTTP servers and clients very straightforward. There are a few edge cases, where a deeper understanding of the http and related packages is very welcome.

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Auto-scaling a Docker Swarm

Setting up a Docker Swarm (“docker swarm mode” if you want to be more accurate), is pretty much a trivial process. You need 3 nodes, create a swarm on one of them and join the other two nodes to the swarm. Simple. What if you wanted a 100 swarm nodes? How fast can you provision new nodes to scale up your Docker Swarm?

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Managing configuration with Viper

Viper is a popular configuration library that’s designed with 12 factor applications in mind.

Viper is a complete configuration solution for go applications including 12 factor apps. It is designed to work within an application, and can handle all types of configuration needs and formats. Viper can be thought of as a registry for all of your applications configuration needs.

Let’s use it to provide configuration for a typical application.

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