[QUESTION] Does khelm support oci helm registries?

[milpog]

Some projects like https://karpenter.sh are only publishing helm charts to oci. Those registries are supported from Helm v3.8.0. I couldn't make khelm working with this type of registry.

• chart configuration

apiVersion: khelm.mgoltzsche.github.com/v2
kind: ChartRenderer
metadata:
  name: karpenter
  namespace: kube-system
repository: "oci://public.ecr.aws/karpenter"
chart: karpenter
version: 0.19.2

• command to render helm chart

export KHELM_TRUST_ANY_REPO=true
kustomize build --enable-alpha-plugins . > karpenter yaml

• error message

Running khelm 2.2.1 (helm 3.10.1)
Using repository "oci://public.ecr.aws/karpenter" (unauthenticated)
Downloading repository index of oci://public.ecr.aws/karpenter
khelm: load chart karpenter: looks like "oci://public.ecr.aws/karpenter" is not a valid chart repository or cannot be reached: object required

[mgoltzsche]

@milpog thanks for reporting the issue! I wasn't aware of the OCI registry support within helm. When Helm supports it, khelm should do so too. I wonder why it isn't working oob since khelm actually uses Helm. A pull request to also make this work within khelm would be appreciated.
Otherwise I may find some time to look into that myself within a few weeks but currently I cannot spare time for this.

[husira]

@mgoltzsche Is OCI supported meanwhile or is this pending?

[mgoltzsche]

Oh, I am afraid this issue was de-prioritized. OCI repos are still not supported by the latest khelm release. Though, I almost finished implementing that feature within #55. I'll finish and merge that PR the next days...

[mgoltzsche]

Now this is fixed within khelm v2.3.2. Sorry for the long delay 😅.

[husira]

Thank you very much for the information and for implementing OCI support :)

[mgoltzsche]

@milpog @husira Using this feature myself really, I realized it wasn't working correctly. I fixed it now and released the fixes with v2.3.4.