Issues with cert-manager

[devantler]

Hey,

I am scratching my head because the service works well for all our deployments but not for cert-manager. With cert-manager, it seems Chartproxy is unable to convert the Helm Chart to OCI.

These are the logs I am getting:

proxy-2024/06/10 12:53:53 download index: https://charts.jetstack.io/index.yaml                                                                
proxy-2024/06/10 12:53:53 downloading : https://charts.jetstack.io/index.yaml                                                                   
proxy-2024/06/10 12:53:54 searching index for cert-manager with reference v1.15.0                                                                     
proxy-2024/06/10 12:53:54 downloading : https://charts.jetstack.io/charts/cert-manager-v1.15.0.tgz-pod-autoscaler@9.8.2
proxy-2024/06/10 12:53:54 searching index for cert-manager with reference v1.15.0
proxy-2024/06/10 12:53:54 downloading : https://charts.jetstack.io/charts/cert-manager-v1.15.0.tgz
proxy-2024/06/10 12:53:54 HEAD /v2/charts.jetstack.io/cert-manager/manifests/v1.15.0 404 NOT FOUND Chart prepare error

Below is my HelmRepository and HelmRelease manifests for cert-manager:

apiVersion: source.toolkit.fluxcd.io/v1
kind: HelmRepository
metadata:
  name: cert-manager
spec:
  insecure: true
  type: oci
  url: oci://${helm_charts_proxy_url:=chartproxy.container-registry.com}/charts.jetstack.io
---
apiVersion: helm.toolkit.fluxcd.io/v2
kind: HelmRelease
metadata:
  name: cert-manager
spec:
  interval: 1m
  chart:
    spec:
      chart: cert-manager
      version: v1.15.0
      sourceRef:
        kind: HelmRepository
        name: cert-manager
  # https://github.com/cert-manager/cert-manager/blob/master/deploy/charts/cert-manager/values.yaml
  values:
    # This configures cert-manager to install and upgrade CRDs as part of the Helm release.
    # https://cert-manager.io/docs/installation/helm/#helm-installation
    installCRDs: true

And lastly here is my HelmRelease manifest for helm-charts-oci-proxy:

apiVersion: helm.toolkit.fluxcd.io/v2
kind: HelmRelease
metadata:
  name: helm-charts-oci-proxy
spec:
  interval: 1m
  chart:
    spec:
      chart: helm-charts-oci-proxy
      version: 1.2.3
      sourceRef:
        kind: HelmRepository
        name: helm-charts-oci-proxy
  # https://github.com/container-registry/helm-charts-oci-proxy/blob/main/chart/values.yaml
  values:
    image:
      tag: staging-202404291447
    app:
      env_vars:
        DEBUG: true
        # USE_TLS: true
        # INDEX_CACHE_TTL: 60 # for how long we have stores manifest and its related blobs
        # MANIFEST_CACHE_TTL: 14400 # for how long we store chart index file content

I am using a self-hosted chartproxy, as I owerwrite the ${helm_charts_proxy_url:=chartproxy.container-registry.com} with the following url: oci://helm-charts-oci-proxy.helm-charts-oci-proxy:9000, so I am pretty sure that this is not related to caching. I have also checked that the the https://charts.jetstack.io/index.yaml looks as expected. Has anyone experienced this?

[EStork09]

I am also seeing this with the hosted version:

helm pull oci://chartproxy.container-registry.com/charts.jetstack.io/cert-manager --version v1.11.2
Error: chartproxy.container-registry.com/charts.jetstack.io/cert-manager:v1.11.2: not found

helm pull oci://chartproxy.container-registry.com/zotregistry.dev/helm-charts/zot --version 0.1.60
Pulled: chartproxy.container-registry.com/zotregistry.dev/helm-charts/zot:0.1.60
Digest: sha256:062bacd2dfd2e738ad96f19a87cae8e2589f547952d7599ef59fdd340a6ec89b

Might be an issue with the way they are hosting the jetstack helm repo, although with the url in the logs I am able to just download it by navigating to that url.

[EStork09]

If you remove the --version "v" it will work, it looks like the v is appended and removed across a few locations. I am not entirely sure but the Manifest Map doesn't have the v in it, so when it looks up with the target it fails. Somewhere the v needs to be persisted in the version or it needs to just be removed as it is already being dropped in one location.

helm pull oci://chartproxy.container-registry.com/charts.jetstack.io/cert-manager --version v1.11.2
Error: chartproxy.container-registry.com/charts.jetstack.io/cert-manager:v1.11.2: not found

helm pull oci://chartproxy.container-registry.com/charts.jetstack.io/cert-manager --version 1.11.2
Pulled: chartproxy.container-registry.com/charts.jetstack.io/cert-manager:1.11.2
Digest: sha256:9092d6334348d9172684fcd0561c7a798696802f95169b40349b76c02627d81e

[EStork09]

https://github.com/container-registry/helm-charts-oci-proxy/blob/main/internal/manifest/manifest.go#L190 I am not entirely sure how m.manifests[repo] is getting created but that is where the problem is, I am guessing the prepareChart pushes it to the m.manifests in some form but I am not 100% familiar enough to get further than that in this short look.