Docker

Distributed system design patterns

How to organize multi-container application Sidecar pattern Let’s start with a single node. It’s a common practice to seperate concerns also on the container levels. One container could act as a static content server, and the other could perform computations. They both exist on the same node and both have access to the same resources - although you may allocate different CPU and memory consumption. Another popular scenario is to have a seperate container that handles logs of the other container as both share the same disk volume.

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Introduction to Docker container networking

Build your network of containers There’s a lot of tutorials showing how to link containers using the docker run –link option, but the link flag is a depricated feature of Docker and may be eventually removed. I will show you how to link containers via docker network providing a template of Dockerfile for your Golang application, but the focus here is really on the process. It’s there already… Assuming you haven’t created any networks yet, executing docker network ls should list the default Docker networks:

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Interview questions about Docker

Be pragmatic I’m currently looking for a job and I found a weird pattern about Docker questions. Once I confirmed I had worked with Docker, no more questions were asked… Lucky me you may think, but that made me wonder why is that. Working with Docker is failry easy. Docker simplified the process of working with isolated resources providing a high-level API to run processes in isolation, but does it not deserve to a little chat about it during an interview?

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