Add Conformance Program Doc for AutoML and Training WG (#2048)

* Add Conformance Program Doc for AutoML and Training WG

* Address Review Comments

Author: andreyvelich

docs/images/conformance-crd-test.png

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+# Conformance Test for AutoML and Training Working Group
+
+Andrey Velichkevich ([@andreyvelich](https://github.com/andreyvelich))
+Johnu George ([@johnugeorge](https://github.com/johnugeorge))
+2022-11-21
+[Original Google Doc](https://docs.google.com/document/d/1TRUKUY1zCCMdgF-nJ7QtzRwifsoQop0V8UnRo-GWlpI/edit#).
+
+## Motivation
+
+Kubeflow community needs to design conformance program so the distributions can
+become
+[Certified Kubeflow](https://docs.google.com/document/d/1a9ufoe_6DB1eSjpE9eK5nRBoH3ItoSkbPfxRA0AjPIc/edit?resourcekey=0-IRtbQzWfw5L_geRJ7F7GWQ#).
+Recently, Kubeflow Pipelines Working Group (WG) implemented the first version of
+[their conformance tests](https://github.com/kubeflow/kubeflow/issues/6485).
+We should design the same program for AutoML and Training WG.
+
+This document is based on the original proposal for
+[the Kubeflow Pipelines conformance program](https://docs.google.com/document/d/1_til1HkVBFQ1wCgyUpWuMlKRYI4zP1YPmNxr75mzcps/edit#).
+
+## Objective
+
+Conformance program for AutoML and Training WG should follow the same goals as Pipelines program:
+
+- The tests should be fully automated and executable by anyone who has public
+  access to the Kubeflow repository.
+- The test results should be easy to verify by the Kubeflow Conformance Committee.
+- The tests should not depend on cloud provider (e.g. AWS or GCP).
+- The tests should cover basic functionality of Katib and the Training Operator.
+  It will not cover all features.
+- The tests are expected to evolve in the future versions.
+- The tests should have a well documented and short list of set-up requirements.
+- The tests should install and complete in a relatively short period of time
+  with suggested minimum infrastructure requirements
+  (e.g. 3 nodes, 24 vCPU, 64 GB RAM, 500 GB Disk).
+
+## Kubeflow Conformance
+
+Initially the Kubeflow conformance will include the CRD based tests.
+In the future, API and UI based tests may be added. Kubeflow conformance consists
+the 3 category of tests:
+
+- CRD-based tests
+
+  Most of Katib and Training Operator functionality are based on Kubernetes CRD.
+
+  **This document will define a design for CRD-based tests for Katib and the Training Operator.**
+
+- API-based tests
+
+  Currently, Katib or Training Operator doesn’t have an API server that receives
+  requests from the users. However, Katib has the DB Manager component that is
+  responsible for writing/reading ML Training metrics.
+
+  In the following versions, we should design conformance program for the
+  Katib API-based tests.
+
+- UI-based tests
+
+  UI tests are valuable but complex to design, document and execute. In the following
+  versions, we should design conformance program for the Katib UI-based tests.
+
+## Design for the CRD-based tests
+
+![conformance-crd-test](../images/conformance-crd-test.png)
+
+The design is similar to the KFP conformance program for the API-based tests.
+
+For Katib, tests will be based on
+[the `run-e2e-experiment.go` script](https://github.com/kubeflow/katib/blob/570a3e68fff7b963889692d54ee1577fbf65e2ef/test/e2e/v1beta1/hack/gh-actions/run-e2e-experiment.go)
+that we run for our e2e tests.
+
+This script will be converted to use Katib SDK. Tracking issue: https://github.com/kubeflow/katib/issues/2024.
+
+For the Training Operator, tests will be based on [the SDK e2e test.](https://github.com/kubeflow/training-operator/tree/05badc6ee8a071400efe9019d8d60fc242818589/sdk/python/test/e2e)
+
+### Test Workflow
+
+All tests will be run in the _kf-conformance_ namespace inside the separate container.
+That will help to avoid environment variance and improve fault tolerance. Driver is required to trigger the deployment and download the results.
+
+- We are going to use
+  [the unified Makefile](https://github.com/kubeflow/kubeflow/blob/2fa0d3665234125aeb8cebe8fe44f0a5a50791c5/conformance/1.5/Makefile)
+  for all Kubeflow conformance tests. Distributions (_driver_ on the diagram)
+  need to run the following Makefile commands:
+
+  ```makefile
+
+  # Run the conformance program.
+  run: setup run-katib run-training-operator
+
+  # Sets up the Kubernetes resources (Kubeflow Profile, RBAC) that needs to run the test.
+  # Create temporary folder for the conformance report.
+  setup:
+    kubectl apply -f ./setup.yaml
+    mkdir -p /tmp/kf-conformance
+
+  # Create deployment and run the e2e tests for Katib and Training Operator.
+  run-katib:
+    kubectl apply -f ./katib-conformance.yaml
+
+  run-training-operator:
+    kubectl apply -f ./training-operator-conformance.yaml
+
+  # Download the test deployment results to create PR for the Kubeflow Conformance Committee.
+  report:
+    ./report-conformance.sh
+
+  # Cleans up created resources and directories.
+  cleanup:
+    kubectl delete -f ./setup.yaml
+    kubectl delete -f ./katib-conformance.yaml
+    kubectl delete -f ./training-operator-conformance.yaml
+    rm -rf /tmp/kf-conformance
+  ```
+
+- Katib and Training Operator conformance deployment will have the appropriate
+  RBAC to Create/Read/Delete Katib Experiment and Training Operator Jobs in the
+  _kf-conformance_ namespace.
+
+- Distribution should have access to the internet to download the training datasets
+  (e.g. MNIST) while running the tests.
+
+- When the job is finished, the script generates output.
+
+  For Katib Experiment the output should be as follows:
+
+  ```
+  Test 1 - passed.
+  Experiment name: random-search
+  Experiment status: Experiment has succeeded because max trial count has reached
+  ```
+
+  For Training Operator the output should be as follows:
+
+  ```
+  Test 1 - passed.
+  TFJob name: tfjob-mnist
+  TFJob status: TFJob tfjob-mnist is successfully completed.
+  ```
+
+- The above report can be downloaded from the test deployment by running `make report`.
+
+- When all reports have been collected, the distributions are going to create PR
+  to publish the reports and to update the appropriate [Kubeflow Documentation](https://www.kubeflow.org/)
+  on conformant Kubeflow distributions. The Kubeflow Conformance Committee will
+  verify it and make the distribution
+  [Certified Kubeflow](https://github.com/kubeflow/community/blob/master/proposals/kubeflow-conformance-program-proposal.md#overview).