ContainerBuilder support for non-GCR registries

[gaoning777]

Currently, the ContainerBuilder only supports the GCR.
Expose the secret configurations for other content registries: https://github.com/GoogleContainerTools/kaniko#pushing-to-different-registries

[sarahmaddox]

@gaoning777 Can we close this issue, after the merge of the above PRs? We have a note in the docs that we can remove when this issue and #337 are closed.

[gaoning777]

Unfortunately, the container builder does not support other registries other than the GCR, yet.

[gaoning777]

/unassign @gaoning777
/assign @numerology

[HassanOuda]

Any updates on this? What are the implications for container builder not supporting non-GCR registries? We cannot push our images to our own registries?

[Trezorro]

I'm trying to evaluate the proposition of using KubeFlow for my company's future ML training workflows. We want to use our local kubernetes cluster, to maintain data security, but this issue has me puzzled on whether we will be forced to set up our experiments via GCP instead.

Can anyone shed a light on this for a novice user?