Local Kubernetes Testing With KIND
If you've spent days (or even weeks?) trying to spin up a Kubernetes cluster for learning purposes or to test your application, then your worries are over.
Join the DZone community and get the full member experience.Join For Free
If you've spent days (or even weeks?) trying to spin up a Kubernetes cluster for learning purposes or to test your application, then your worries are over. Spawned from a Kubernetes Special Interest Group, KIND is a tool that provisions a Kubernetes cluster running IN Docker.
From the docs:
kindis a tool for running local Kubernetes clusters using Docker container "nodes".
kindis primarily designed for testing Kubernetes 1.11+, initially targeting the conformance tests.
As it is built using
go, you will need to make sure you have the latest version of
golang installed on your machine.
According to the k8s docs,
golang -v 1.11.5 is preferred. To install kind, run these commands (it takes a while):
go get -u sigs.k8s.io/kind kind create cluster
kind cluster is available:
kind get clusters
Setting Up Kubectl
Also, install the latest
kubernetes-cli using Homebrew or Chocolatey.
The latest Docker has Kubernetes feature but it may come with older
kubectl . Check its version by running this command:
Make sure it shows
GitVersion: "v1.14.1" or above.
If you find you are running
kubectlfrom Docker, try
brew link or reorder path environment variable.
kubectl and kind are ready, open bash console and run these commands:
export KUBECONFIG=”$(kind get kubeconfig-path)” kubectl cluster-info
kind is properly set up, some information will be shown.
Now you are ready to proceed. Yay!
Deploying First Application
What should we deploy on the cluster? We are going to attempt deploying Cassandra since the docs have a pretty decent walkthrough on it.
First of all, download
cassandra-statefulset.yaml for later. Then create
kustomization.yaml by running two
yaml files are prepared, layout them as following:
k8s-wp/ kustomization.yaml mysql-deployment.yaml wordpress-deployment.yaml
Then apply them to your cluster:
cd k8s-wp kubectl apply -k ./
Get the Cassandra Service.
kubectl get svc cassandra
The response is:
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE cassandra ClusterIP None <none> 9042/TCP 45s
Note that Service creation might have failed if anything else is returned. Read Debug Services for common issues.
That's really all you need to know to get started with KIND, I hope this makes your life a little easier and lets you play with Kubernetes a little bit more.
Published at DZone with permission of Sudip Sengupta. See the original article here.
Opinions expressed by DZone contributors are their own.
Comparing Cloud Hosting vs. Self Hosting
Is Podman a Drop-in Replacement for Docker?
Competing Consumers With Spring Boot and Hazelcast
Microservices With Apache Camel and Quarkus