KEP-2170: Add APIs for TrainJob and TrainingRuntime

[andreyvelich]

Related: #2170.

We should add APIs for TrainJob, TrainingRuntime, ClusterTrainingRuntime.

The directory structure that we want to follow:

/cmd/training-operator.v2alpha1/Dockerfile
/cmd/training-operator.v2alpha1/main.go

/pkg/apis/kubeflow.org/v2alpha1
/pkg/controller.v2/trainjob_controller.go

/pkg/webhooks/trainjob_webhook.go

/assign @andreyvelich
/area api

[tenzen-y]

Could you separate the PR to create skeleton v2 manager and API changes since it is better to define APIs in the dedicated PR for easy tracking?

1st issue and PR is responsible for setting up skeleton v2 manager.

• /cmd/training-operator.v2alpha1/Dockerfile
• /cmd/training-operator.v2alpha1/main.go

2nd issue and PR is responsible for adding APis.

• /pkg/apis/kubeflow.org/v2alpha1

Regarding the below implementations should be treated as other issues:

• /pkg/controller.v2/trainjob_controller.go
• /pkg/webhooks/trainjob_webhook.go

[andreyvelich]

Could you separate the PR to create skeleton v2 manager and API changes since it is better to define APIs in the dedicated PR for easy tracking?

1st issue and PR is responsible for setting up skeleton v2 manager.

• /cmd/training-operator.v2alpha1/Dockerfile
• /cmd/training-operator.v2alpha1/main.go

2nd issue and PR is responsible for adding APis.

• /pkg/apis/kubeflow.org/v2alpha1

Regarding the below implementations should be treated as other issues:

• /pkg/controller.v2/trainjob_controller.go
• /pkg/webhooks/trainjob_webhook.go

Sure, that makes sense! Will do that.