Using Helm

Inhaltsverzeichnis


Helm is a package manager for Kubernetes which makes it easy to install common applications like an Ingress Controller into your Kubernetes cluster.

Installation

All MetaKube clusters come pre-configured with Helm out of the box. You just have to install the helm command line client to start deploying Helm charts. See the official Helm installation guide for instructions for your operation system.

Usage

After you installed the command line client you can run:

helm ls

to get a list of all installed charts, which initially is empty. You can find a list of publicly available Helm charts at Kubeapps Hub. To install for example wordpress, just run:

helm install stable/wordpress --namespace default --name my-wordpress

This will deploy WordPress, MariaDB and configure a LoadBalancer. It may take a few minutes for the LoadBalancer IP and pods to be available. You can watch the status of the service until an external IP appears with:

kubectl get svc --namespace default -w -l release=my-wordpress

You can watch the status of all pods until they are ready and running with:

kubectl get pods --namespace default -w -l release=my-wordpress

To get the WordPress URL then run:

export SERVICE_IP=$(kubectl get svc --namespace default my-wordpress-wordpress -o jsonpath='{.status.loadBalancer.ingress[0].ip}')
echo "WordPress URL: http://$SERVICE_IP/"
echo "WordPress Admin URL: http://$SERVICE_IP/admin"

And to get the user credentials:

echo Username: user
echo Password: $(kubectl get secret --namespace default my-wordpress-wordpress -o jsonpath="{.data.wordpress-password}" | base64 --decode)

To delete WordPress again, you can run:

helm del --purge my-wordpress

For more information on how to use helm have a look at the documentation.