Pushing to a registry addon from the host fails with "certificate signed by unknown authority"

[Molter73]

Is there an existing issue for this?

• [X] I have searched the existing issues

Current Behavior

When I deploy a registry addon with the metallb ingress and cert-manager, pushing images into the registry with docker fails with the message Get "https://172.18.0.100/v2/": tls: failed to verify certificate: x509: certificate signed by unknown authority

I believe this is because the host does not know the cert-manager authority used for the generated self-signed certificates. Might be loosely related to #169 but not 100% sure.

Expected Behavior

Pushing images into the registry should work and the images should be made available to the cluster.

Steps To Reproduce

1. Deploy a registry

   registry := registry.NewBuilder().WithServiceTypeLoadBalancer().Build()
   env, err = environments.NewBuilder().WithAddons(
       certmanager.New(),
       metallb.New(),
       registry,
   ).Build(ctx)

2. Attempt to push an image with the docker go sdk

   cli, err := dockerClient.NewClientWithOpts(dockerClient.FromEnv)
   
   source := "quay.io/bpfman-userspace/go-tc-counter:latest"
   index := strings.LastIndex(source, "/")
   target := fmt.Sprintf("%s/%s", registry.LoadBalancerAddress(), source[index+1:])
   
   err = cli.ImageTag(context.Background(), source, target)
   if err != nil {
       return err
   }
   
   closer, err := cli.ImagePush(context.Background(), image.target, dockerTypes.ImagePushOptions{
       All:          true,
       RegistryAuth: "something",
   })
   
   if err != nil {
       return err
   }
   
   io.Copy(os.Stdout, closer)
   closer.Close()

3. Alternatively trying to push images manually with the docker cli produces the same error

   docker tag quay.io/bpfman-userspace/go-tc-counter:latest 172.18.0.100/go-tc-counter:latest
   docker push 172.18.0.100/go-tc-counter:latest

Kong Kubernetes Testing Framework Version

v0.24.1

Kubernetes version

kind v0.22.0 go1.21.7 linux/amd64
Client Version: v1.29.2
Kustomize Version: v5.0.4-0.20230601165947-6ce0bf390ce3
Server Version: v1.29.2

Anything else?

No response