Kind[55] (an acronym for Kubernetes IN Docker) is a tool developed by the Kubernetes team to run local Kubernetes clusters using Docker containers as nodes. It’s the easiest way to run your own Kubernetes cluster, and it’s great for local development, testing, and continuous integration.
To install Kind, run the following:
| | $ curl -Lo ./kind https://kind.sigs.k8s.io/dl/v0.8.1/kind-$(uname)-amd64 |
| | $ chmod +x ./kind |
| | $ mv ./kind /usr/local/bin/kind |
To use Kind, you’ll need to install Docker.[56] See Docker’s dedicated install instructions for your operation system.
With Docker running, you can create a Kind cluster by running:
| | $ kind create cluster |
You can then verify that Kind created your cluster and configured kubectl to use it by running the following:
| | $ kubectl cluster-info |
| | > Kubernetes master is running at https://127.0.0.1:46023 |
| | KubeDNS is running at \ |
| | https://127.0.0.1:46023/api/v1/namespaces/kube-system/services/kube-dns:dns/proxy |
To further debug and diagnose cluster problems, use kubectl cluster-info dump.
Kind runs one Docker container representing one Kubernetes node in the cluster. By default, Kind runs a single node cluster with everything needed for a functioning Kubernetes cluster. You can see the Node container by running this:
| | $ docker ps |
| | CONTAINER ID IMAGE COMMAND CREATED ... |
| | 033de99b1e53 kindest/node:v1.18.2 "/usr/local/bin/entr…" 2 minutes... |
We have a running Kubernetes cluster now—let’s run our service on it! To run our service in Kubernetes, we’ll need a Docker image, and our Docker image will need an executable entry point. Let’s write an agent CLI that serves as our service’s executable.