Docker containers are nice and offer a very lean and structured way to package and deploy applications. However, if you really want to run large scale containerized applications, you need more - you need to deploy, orchestrate and manager all your containers in a highly customizable and automated way. In other words, you need a … Continue reading Kubernetes – an overview
In the last few posts on the bitcoin blockchain, I have already extensively used Docker container to quickly set up test environments. However, it turned out to be a bit tiresome to run the containers, attach to them, execute commands etc. to get into a defined state. Time to learn how this can be automated … Continue reading Controlling Docker container with Python
In this post, we will look in more detail at networking with Docker if communication between a Docker container and either the host or the outside world is involved. It turns out that in these cases, the Linux Netfilter/iptables facility comes into play. This post is not meant to be an introduction into iptables, and … Continue reading Docker internals: networking part II
In this post, we will investigate one of the more complex topics when working with Docker - networking. We have already seen in the previous post that namespaces can be used to isolate networking resources used by different containers as well as resources used by containers from those used by the host system. However, by … Continue reading Docker internals: networking part I
In the last post in my series on bitcoin and the blockchain, we have successfully "dockerized" the bitcoin core reference implementation and have built the bitcoin-alpine docker container that contains a bitcoin server node on top of the Alpine Linux distribution. In this post, we will use this container image to build up and initialize … Continue reading Setting up and testing our bitcoin network
A couple of years back, when I first looked into Docker in more detail, I put together a few pages on how Docker is utilizing some Linux kernel technologies to realize process isolation. Recently I have been using Docker again, so I thought it would be a good point in time to dig out some … Continue reading Docker internals: process isolation with namespaces and cgroups
When we are playing with bitcoin transactions, we need some playground where making a mistake does not cost us real bitcoins and therefore money. In addition, we might want to play around with more than one bitcoin server to see how networkings works and how the messages are exchanged in the bitcoin peer-to-peer network. There … Continue reading Building a bitcoin container with Docker
