What

This creates a webhook, which will set a default ingress class whenever you create an ingress without any class.

Why

If you have a cluster with multiple ingress controller, you must specify for each ingress object, or multiple controllers will fight for that object. This hook makes sure each object does specify a class. -> No more fighting.

How

Using the github plugin you can install it like this:

helm github install --repo git@github.com:michas2/set-default-ingress-class-hook.git --path helm/ingressInjectorWebhook --set class="nginx"

Simply specify which ingress class you want to set as default. Then whenever a classless ingress object is created, the hook will add the default ingress class.

• The image directory is automatically build by docker hub as michas2/set-default-ingress-class-hook.
• The helm directory contains the chart which will use that image.
• The cert.sh script creates a tls certificate for secure communication between api-server and webhook.

Currently you also need to --set caBundle=... to the certificate created by the script. You currently probably want to use it like this:

$ ./cert.sh
[...]
Please set caBundle to 'LS0tXXX'.
$ helm install helm/ingressInjectorWebhook --set class="nginx" --set caBundle="LS0tXXX"

Looks like there is no good way to automate this in the helm chart...