Ljubljana, Slovenia

Docker

Deploying Go applications with Docker

When dealing with a new language, if it’s migrating from PHP to Node, or if it’s your first time trying out Go, you eventually get to the point when you have to think about how you will use your new application in production. How you will deploy it, how you will run it, and how you will make sure that it’s running well. I’m a big advocate od Docker, let me show you why.

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Debugging Docker network connectivity

A few weeks ago I wrote a short article, networking basics with docker. Since then, I’ve migrated my production environment to be docker only, and I’ve deployed 5 docker hosts which handle various tasks, from a production file server, search server with solr, my complete development environment and some websites (including this one!).

Over the course of a week I was hitting a few timeouts in connecting from one docker container to another, and finally, yesterday I consistently pinpointed a 4+ second delay on an API service I was writing. Four seconds. I’ll go over the steps that I took to diagnose and resolve the issue.

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How to live inside a docker container?
This is a story of how I learned to stop worrying and love the bomb. Well, it’s just about as iconic. Lone developer turns to Docker to set up a clean development environment as seamlessly as possible, including the bells and whistles of SSH agent forwarding. I’m pretty sure some of the folks on Docker HQ might have a small panic attack reading this one. Alas, I’m not a cardiac health professional.
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Networking basics with Docker

If you run several docker containers, you might have already come to the requirement, that they talk to eachother via network. After all, your web application container should use your database container to store to and retrieve data from. This means, that in some way, your webserver container should talk to your database container.

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