Hello Dev,
I'm happy to share with you a deployment I recently had to do :).
So... Imagine you have a helm chart for example from Crossplane. What if the Helm Chart doesn't fit your needs? Yes, you could just edit it by hand and make it fit. But what if a new version comes out and you have to upgrade it? You have to do it all over again :(. I'm gonna show you how I did it and what worked out for me.
In the Crossplane Helm-Chart is a ConfigMap used to store the PKI Certificates. But I would like to use a Secret. So I wrote a part of a Deployment that overrides the ConfigMap with a Secret.
apiVersion: apps/v1
kind: Deployment
metadata:
name: crossplane
spec:
template:
spec:
volumes:
- name: ca-certs
configMap: null
secret:
secretName: pki
items:
- key: pki
path: pki
When this config should be used you have to mention it in your kustomization.yaml file under the patchesStrategicMerge property.
namespace: kube-crossplane
patchesStrategicMerge:
- deployment-crossplane.yaml
helmCharts:
- name: crossplane
version: 1.10.1
repo: https://charts.crossplane.io/stable
valuesFile: values.yaml
When you deploy that, the ConfigMap for ca-certs will now be replaced with a Secret.
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