In the last post in this series, we have created a more or less functional bitcoin controller. However, to be reasonably easy to operate, there are still a few things that are missing. We have hardcoded secrets in our images as well as our code, and we log data, but do not publish events. These…More
Playing with Travis CI
You are using Github to manage your open source projects and want a CI/CD pipeline, but do not have access to a permanently available private infrastructure? Then you might want to take a look at hosted CI/CD platforms like Bitbucket pipelines, Gitlab, CircleCI – or Travis CI When I was looking for a cloud-based integration…More
Building a bitcoin controller for Kubernetes part VIII – creating a helm chart
Our bitcoin controller is more or less complete, and can be deployed into a Kubernetes cluster. However, the deployment process itself is still a bit touchy – we need to deploy secrets, RBAC profiles and the CRD, bring up a pod running the controller and make sure that we grab the right version of the…More
Building a bitcoin controller for Kubernetes part VII – testing
Kubernetes controllers are tightly integrated with the Kubernetes API – they are invoked if the state of the cluster changes, and they act by invoking the API in turn. This tight dependency turns testing into a challenge, and we need a smart testing strategy to be able to run unit and integration tests efficiently. The…More
Building a bitcoin controller for Kubernetes part V – establishing connectivity
Our bitcoin controller now has the basic functionality that we expect – it can synchronize the to-be state and the as-is state and update status information. However, to be really useful, a few things are still missing. Most importantly, we want our nodes to form a real network and need to establish a mechanism to…More
Building a bitcoin controller for Kubernetes part IV – garbage collection and status updates
In our short series on implementing a bitcoin controller for Kubernetes, we have reached the point where the controller is actually bringing up bitcoin nodes in our network. Today, we will extend its logic to also cover deletions and we will start to add additional logic to monitor the state of our network. Step 9:…More
Building a bitcoin controller for Kubernetes part III – service accounts and the reconciliation function
In the previous post, we have reached the point where our controller is up and running and is starting to handle events. However, we hit upon a problem at the end of the last post – when running in-cluster, our controller uses a service account which is not authorized to access our bitcoin network resources.…More
Building a bitcoin controller for Kubernetes part II – code generation and event handling
In this post, we will use the Kubernetes code generator to create client code and informers which will allow us to set up the basic event handlers for our customer controller. Before we start to dig into this, note that compared to my previous post, I had to make a few changes to the CRD…More
Building a bitcoin controller for Kubernetes part I – the basics
As announced in a previous post, we will, in this and the following posts, implement a bitcoin controller for Kubernetes. This controller will be aimed at starting and operating a bitcoin test network and is not designed for production use. Here are some key points of the design: A bitcoin network will be specified by…More
Understanding Kubernetes controllers part IV – putting it all together
In the last few posts, we have looked in detail at the various parts of the machinery behind Kubernetes controllers – informers, queues, stores and so forth. In this final post, we will wrap up a bit and see how all this comes together in the Kubernetes sample controller. The flow of control The two…More
LeftAsExercise 