Ljubljana, Slovenia

Docker

Docker, you lied to me

I know, I know. I’m dramatic. The title is basically clickbait, but the subject is just as true as the title. You should read this article because it will save your life! Okay, it might not save your life, but most likely it will solidify some very important information about Docker containers, which will most likely save of some drama down the line.

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Setting up your own Docker swarm

Scaling your service has usually been in the domain of system operators, which installed servers and developers tweaking software when the load got high enough to warrant scaling. Soon enough you’d be looking at tens or even hundreds of instances which took a lot of time to manage. With the release of Docker 1.12, you now have orchestration built in - you can scale to as many instances as your hosts can allow. And setting up a docker swarm is easy-peasy.

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Golang tips and tricks

It’s been a while since I’ve started programming with Go, and I managed to pick up certain tricks along the way, which I’ll present you with. Use them wisely and you’ll be on your way to creating that beautiful product or service you’ve been itching to start.

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Docker Maze: the benefit of coding competitions

Coding competitions are a good way to test and improve your skills. Some of the skills you might already have just by the nature of the engineering job itself - you have to set up your development environments, trouble-shoot connectivity issues, and solve problems when they occur. I don’t need to tell you that it’s better to learn these skills in a controlled environment, and perhaps not while watching your production systems fail. And in case that does happen - you don’t want to be the one who’s just looking at whatever metrics you have and pray for some kind of miracle. But, putting a time limit on a competition - it keeps some pressure on you, just like the real thing.

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Exposing your Docker API

As I wrote some weeks ago in “How to live inside a docker container?”, when you pass a docker socket to your container, you’re essentially enabling the container full access to your Docker host OS. This means that you can create containers, pull images, or more destructively - stop and delete containers and images.

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