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Powered by Kubernetes

kubernetes logo Just a quick note to say that I ditched Docker Swarm and now this rarely updated blog is powered by Kubernetes. Total overkill, I know. Like Roller itself, I did it as a learning exercise. I hope to blog more about what I learned by doing this. For now, here's a quick summary of what I've done so far.

Created a cluster

I created a 2-node Kubernetes cluster on Digital Ocean using some hand-crafted Ansible scripts that call apt-get to install and kubeadm to start Kubernetes. I considered using Typhoon to create the cluster, but I really wanted to learn how to install Kubernetes "from scratch".

Ran two Ingress Controllers

To avoid using Digital Ocean's $20/month load balancer I'm running an Nginx Ingress controller on each node, and pinning containers to nodes using labels and nodeSelectors. I had to borrow Nginx Controller setup files from the Typhoon project because I'm still kind of bewildered by Ingresses.

Deployed my containers

Next, I wrote Kubernetes YAML files for deploying my containers: a private Docker Registry, PostgreSQL and my custom Roller image. Getting the private registry working properly was the biggest challenge. I need private because I don't want to make my custom Roller image public. Next, I'll install Jenkins next for CI/CD of my custom Roller build via the Jenkins Kubernetes plugin.

Let me know if there are any aspects of this that you'd like to see covered in a blog entry, or suggestions for running the cluster without two Ingress Controllers. I've already got a post cooking about installing a TLS secured Docker Registry on Kubernetes.

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