porch function runner is unable to pull image from a repository with self-signed certificate

[dromie]

There is no configuration option to add a trusted private certificate authority for pulling docker images.

Mounting a configmap/secret to /etc/ssl/cert.pem does work as a workaround.

[Catalin-Stratulat-Ericsson]

Hello @dromie if your question relates to you trying to pull an image from a registry that requires authentication to access then i believe this PR that has just been merged suits what you are looking for.

Here is some documentation of how to set it up.

Let me know if that suits your needs.

[dromie]

I've seen your PR about authentication, but this issue is about the SSL/TLS certificate of the registry.
The actual error message is "cert: x509: certificate signed by unknown authority: Get "https://": tls: failed to verify certificate: x509: certificate signed by unknown authority"

[Catalin-Stratulat-Ericsson]

perhaps you could try this
its intended for git deployments over https but it may also work for your use case.

Am i understanding your point correctly? your registry is behind https and the tls certificate required to access it is self signed on your machine and there does not seem to be a means of including that in the function-runner deployment to use in case of TLS requirement on the container registry

[Catalin-Stratulat-Ericsson]

if you could provide a step by step issue reproduction with logs that would be very helpful.

[kispaljr]

Steps to reproduce the issue:

1. deploy a local container image registry (i.e. Harbor) with a self-signed TLS certificate, that is accessible e.g. at https://local-registry.my/...
2. push a KRM function into the registry: i.e. local-registry.my/krm-fn/set-labels:1.0
3. porchctl rpkg init my-pkg --repository my-repo --workspace initial
4. porchctl rpkg pull ...
5. edit the Kptfile and add local-registry.my/krm-fn/set-labels:1.0 to the pipeline, i.e.:

apiVersion: kpt.dev/v1
kind: Kptfile
metadata:
  name: my-pkg
  annotations:
    config.kubernetes.io/local-config: "true"
pipeline:
  mutators:
  - image: local-registry.my/krm-fn/set-labels:1.0

6. porchctl rpkg push ...

the rendering of the package (that is triggered by push) will fail, because porch (actually the function-runner) will be unable to pull the local-registry.my/krm-fn/set-labels:1.0 KRM function due to "tls: failed to verify certificate: x509: certificate signed by unknown authority".