So far, we have mainly discussed how compute and network resources are used and managed with Kubernetes. We will now turn to the third fundamental element of a container platform - storage. Docker storage concepts Before we talk about Kubernetes storage concepts, let us first recall how storage is managed in Docker. The following tests … Continue reading Kubernetes storage under the hood part I – ephemeral storage
In this post, we will look in some more detail into networking in a Kubernetes cluster. Even though the Kubernetes networking model is independent of the underlying cloud provider, the actual implementation does of course depend on the cloud provider which communicates with Kubernetes through a CNI plugin. I will continue to use EKS, so … Continue reading Watching Kubernetes networking in action
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
