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

[Molter73]

Is there an existing issue for this?

• 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