Description

The goal of the following sections will be to set up a basic infrastructure that will be used as a base for further developments. As such, I will try to put in place a local Kubernetes (k8s) equivalent, on which I will deploy a PostgreSQL instance and a Kafka bus. I’ve chosen those 2 components because I’m used to them in my day-to-day work.

Installation of a k8s equivalent

k8s is used in a lot of places, and I was looking forward to deepening my understanding of it. Which is why I choose a local variant to deploy the different components, even if I miss some features.

As for local versions of k8s, many are available:

• k3s

• MicroK8s

• minikube

• kind

• and probably others…

I’ve never heard of kind before (neither microK8s), so I decided to try it out. All I need is docker on my machine, which is well within my capabilities. I was initially going to install k3s, but seeing sudo usage in the examples made me hesitate…

The installation was easy, I just had to follow the installation guide:

$ curl -Lo ./kind https://kind.sigs.k8s.io/dl/v0.17.0/kind-linux-amd64
$ chmod +x ./kind
# I just changed the destination folder
$ mv ./kind ~/.local/bin/kind

Once installed I specified a configuration file for my future cluster. Mr. Sandman was playing in my head while doing it, so there might be reference to it here and there:

# a cluster with 3 control-plane nodes and 3 workers
kind: Cluster
apiVersion: kind.x-k8s.io/v1alpha4
name: sandman
nodes:
- role: control-plane

Then I applied the configuration to create my cluster (it can take some time):

$ kind create cluster --config config.yaml
$ kind get clusters
kind
sandman

Voilà, I have my local cluster to work on!