Okay, so I managed to successfully upgrade the Chart with Helm locally and Tiller in the Namespace.
Since the app is still listed as a deployed app in the Rancher UI, I hope that doesn’t do any side effects, since I will be managing it from my local Helm now… Or is there a way to delete it from Rancher Apps without actually deleting the release from the cluster?
Here’s what I did to make my local Helm find the installed release:
First I installed Helm and Tiller using the following section from the Helm manual: https://helm.sh/docs/using_helm/#example-deploy-tiller-in-a-namespace-restricted-to-deploying-resources-only-in-that-namespace
Of course, using the namespace the App is already deployed in and changing
["*"] (in trial and error).
After doing that,
helm list showed me the release I previously made through Rancher UI.
I could use
helm get values to retrieve a
config.yaml file for future customization.
Hope that helps others in the same situation, too.