implement cross namespace secret ref for etcd

[olamilekan000]

Summary

change implements cross namespace reference for ectd secret

What Type of PR Is This?

/kind feature

Related Issue(s)

Fixes 99

Release Notes

Add cross namespace secret reference for etcd secret

[kcp-ci-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by:
Once this PR has been reviewed and has the lgtm label, please assign xrstf for approval. For more information see the Kubernetes Code Review Process.

The full list of commands accepted by this bot can be found here.

Needs approval from an approver in each of these files:

• OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[olamilekan000]

I'll be closing because Volumes needs to access the secret from the same namespace as the Pod, trying to make secret namespaced scoped at the moment, won't work.

podSpec.Volumes = append(podSpec.Volumes, corev1.Volume{
	Name: volumeName,
	VolumeSource: corev1.VolumeSource{
		Secret: &corev1.SecretVolumeSource{
			SecretName: config.TLSConfig.SecretRef.Name,
		},
	},
})